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10/11/12 2:23am - Original Message: 'Good set up for my vette'
Vetto1974
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Hayward, CA - USA

Vette(s):
I have 1974 Corvette, with white exterior and silver interior. It has 350.

Joined: 10/9/2012
Posts: 30
Hi Everyone, Just got my 1974 Vette about a month ago and would like to find a good engine set up. Currently, it has 350, 3speed automatic. It is pretty much bone stock. So, I a, thinkimg of modifying the upper block. I am thingking of getting 650-750 cfm 4 barrels carburator, intake, lifters, rollers, cam, and gear drive, and possibly a side exhaust or full length headers. Can you suggest any brands, ratio, or specs, that can improve the performance.. And any place to get good price Thank you

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10/11/12 8:13am - Reply: 'Re: Good set up for my vette'
Case75
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, - Canada

Vette(s):
1975 Corvette 383 stroker w/Patriot 190 heads, Eagle stroker kit, Comp 279TH7 cam, DUI distributor, Edelbrock 7116 intake, Edelbrock 1806 carb, Hedman Hedders, TH400 w/TCI Breakaway 2400 stall, Transgo 1-2 shift kit.

Joined: 6/19/2012
Posts: 230
Well, here's what mods have been done to mine:
 
Edelbrock 750 CFM Performer carb.
Edelbrock Performer RPM intake.
14X3 Air cleaner.
Comp Cams Magnum roller rockers 1.6 ratio.
Hedman 1 5/8 into 3 inch collector long tube HTC coated headers.
2.5 inch mandrel bent pipes with crossover.
Magnaflow mufflers.
High flow water pump
4 core rad.


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Build Date: May 7, 1975. 383 w/267 RWHP/310 RWTQ
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10/11/12 8:47am - Reply: 'Re: Good set up for my vette'
corvette440hp Lifetime Member
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Joined: 7/2/2006
Posts: 8205
Summit Racing can supply you with just about anything you might want or need. Great people!Thumbs Up

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corvette440hp
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10/11/12 5:05pm - Reply: 'Re: Good set up for my vette'
CCasey
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New Albany, OH - USA

Vette(s):
1980 Coupe / Snowcrest White / L48, 350 / Comp Cam / Edelbrock Heads / Cyclone Intake / Holley Carb / Holley Fuel Pump / Patriot Headers / Dual Exhaust / Magnaflow Mufflers / 1964 Coupe / Riverside Red / L76, 327, 365hp

Joined: 8/17/2010
Posts: 173

I had the same questions a couple years agao and sent an email to VETTE Magazine.  One of their editors, Dave Emanuel, set me up with the following modifications.

Comp Cam Hydraulic Roller Cam

      Duration @ .050: 210 intake; 220 exhaust

      Lobe Lift: .3340 intake; .3420 exhaust

      Lobe Separation: 112-degrees

      Gross Valve Lift: .501 intake; .513 exhaust

                      

Comp Cam Lifters

Comp Cam Timing Set

Comp Cam Valve Locks

Comp Cam Retainers

Comp Cam Valve Springs

Comp Cam Roller Rockers

Comp Cam Wear Plate

Comp Cam Cam Button

 
Edelbrock E-Street Aluminum Cylinder Heads

      2.02-inch intake / 1.60-inch exhaust Valves

      64-cc Combustion Chambers

      RPM Range: Idle – 5,500

 

Holley Street Avenger 770-cfm Carburetor

 

Holley 80 GPH Fuel Pump w/ 3/8-inch Fuel Line

 

Power+Plus Cyclone+Plus Dual Plane Intake Manifold

 

ECC Distributor Cap / Rotor

 

Patriot Ceramic-Coated Tight-Tuck Exhaust Headers

           1 5/8-inch Primaries

            2 ˝-inch Collectors

 

2 ˝-inch Aluminum Dual Exhaust

 

MAGNAFLOW 2 ˝-inch Mufflers

 

14 x 3-inch Chrome Performance Air Cleaner

 

And just to make it look good, PML “Corvette” Script Valve Covers.

 


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Chuck

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10/11/12 5:38pm - Reply: 'Re: Good set up for my vette'
ROCKRDR
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Lakeside, AZ - USA

Vette(s):
1975 C3 Stingray

Joined: 7/23/2012
Posts: 126
ok I havent pulled the valve covers off my 75 Vette, but do our Vettes have "Roller" rockers stock????

Jason


____________________________________
1975 Corvette Coupe 
My first Vette.....trying to fix stuff

My Project:
https://docs.google.com/folder/d/0B6uOAIjGf3cWejQ5TjNkcVRybGs/edit
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10/11/12 6:44pm - Reply: 'Re: Good set up for my vette'
Case75
Former Member
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, - Canada

Vette(s):
1975 Corvette 383 stroker w/Patriot 190 heads, Eagle stroker kit, Comp 279TH7 cam, DUI distributor, Edelbrock 7116 intake, Edelbrock 1806 carb, Hedman Hedders, TH400 w/TCI Breakaway 2400 stall, Transgo 1-2 shift kit.

Joined: 6/19/2012
Posts: 230
ROCKRDR said: ok I havent pulled the valve covers off my 75 Vette, but do our Vettes have "Roller" rockers stock????

Jason

No, stamped steel.

____________________________________
 
Build Date: May 7, 1975. 383 w/267 RWHP/310 RWTQ
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10/12/12 7:32am - Reply: 'Re: Good set up for my vette'
VikingVette
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Greer, SC - USA

Vette(s):
1978 Black with Viking mural painted under hood AM/FM/CB radio, T-top and a 2013 Cyber Gray Grand Sport Coupe, 2LT for my daily driver

Joined: 3/13/2012
Posts: 264
I swapped motors and went with a ZZ4 (I should have gone with the fast burn ZZ4) and even those have the stamped rocker arms (I was a bit suprised to discover that).  Don't forget about the rest of your power train if you beef up the engine (torque converter especially).  When I did the engine swap, I knew NOTHING about engines and had no one to talk to about it.  If I had known more, I might have put a stroker in there, or at least the fast burn.
Breast (oopsEmbarrassed....I mean BEST) of luck to you

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Warning: The surgeon general has declared that it is NOT unhealthy to smoke your competition AND I just discovered that my corvette is a hybred.  It burns gas and rubber! 
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10/12/12 7:59pm - Reply: 'Re: Good set up for my vette'
Case75
Former Member
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, - Canada

Vette(s):
1975 Corvette 383 stroker w/Patriot 190 heads, Eagle stroker kit, Comp 279TH7 cam, DUI distributor, Edelbrock 7116 intake, Edelbrock 1806 carb, Hedman Hedders, TH400 w/TCI Breakaway 2400 stall, Transgo 1-2 shift kit.

Joined: 6/19/2012
Posts: 230
VikingVette said: I swapped motors and went with a ZZ4 (I should have gone with the fast burn ZZ4) and even those have the stamped rocker arms (I was a bit suprised to discover that).  Don't forget about the rest of your power train if you beef up the engine (torque converter especially).  When I did the engine swap, I knew NOTHING about engines and had no one to talk to about it.  If I had known more, I might have put a stroker in there, or at least the fast burn.
Breast (oopsEmbarrassed....I mean BEST) of luck to you

That's the one I want as well...money is the issue. My L48 still runs very strong; just a bit of oil consumption but no other issues so hard to justify spending the money on a new motor. I want to do some supension/steering work before that.

____________________________________
 
Build Date: May 7, 1975. 383 w/267 RWHP/310 RWTQ
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10/13/12 12:45am - Reply: 'Re: Good set up for my vette'
F4Gary Gold Member
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.

Joined: 8/26/2006
Posts: 862
If you are going to spend that much money, I'd go for a 4 speed overdrive auto tranny.

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10/13/12 1:08am - Reply: 'Re: Good set up for my vette'
Vetto1974
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Hayward, CA - USA

Vette(s):
I have 1974 Corvette, with white exterior and silver interior. It has 350.

Joined: 10/9/2012
Posts: 30
Thank for all suggestions. I spent quite a good time talking to Suumit Racing tech service. With the stock bottom block that I have, they are recommending 650 cfm Holley, comp cams, rollers, and lifters. Also recommending MSD 6201. Also, he told me dont change my intake and distributor if not broken. I called again after 30 minutes and talk to a different guy, suggesting to use, I believe, a new brand of carburator, Quick Silver, or something quick. I did ask him about changing my intake he recommended edelbock 2101 with spacer, but he said it might be tight on top unless I can find a skinny air filter. My question, and need your help, if i am changing my carburator, to 4 barrels, do I need to change my intake? Should I go higher than 650 cfm? If I will chnge my intake, which one, I can use without mods to my hood? Or better yet, which air cleaner is skinny enough, that i dont need to change my hood. Thank you

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10/13/12 7:45am - Reply: 'Re: Good set up for my vette'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6804
Alex, if you are doing some upper end work and going with a new performance carb, I would absolutely make the investment in an aluminum manifold. An Edelbrock performer or performer RPM manifold would do nicely and I do agree with a 650 CFM carb on a slightly "warmed up" 350. You don't need anything bigger than that.

I have seen used performers on Ebay for $60 if you're willing to take a chance with a reputable seller, but again, definitely worth the investment. It is more of a performance design, and will keep the carb and juices cooler than a cast iron manifold.

I have been playing with small block combos for years and Edelbrock makes great manifolds. I have a Performer PM Air Gar on my car now - simply awesome!!

As for the distributor, if your HEI is in good shape, it'l do fine. Check the cap and rotor and make sure you use good quality wires. Thumbs Up

Good Luck!!

Paul


|UPDATED|10/13/2012 4:45:00 AM (AZT)|/UPDATED|


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10/13/12 8:37am - Reply: 'Re: Good set up for my vette'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6804
http://www.ebay.com/itm/SBC-Edelbrock-performer-RPM-intake-manifold-chevy-350-383-400-/261110545703?pt=Motors_Car_Truck_Parts_Accessories&hash=item3ccb66bd27&vxp=mtr



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Veteran of Operation Iraqi Freedom
101st Airborne(AirAssault!)
God Bless America

Support Our Troops


     
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10/13/12 9:14am - Reply: 'Re: Good set up for my vette'
Case75
Former Member
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, - Canada

Vette(s):
1975 Corvette 383 stroker w/Patriot 190 heads, Eagle stroker kit, Comp 279TH7 cam, DUI distributor, Edelbrock 7116 intake, Edelbrock 1806 carb, Hedman Hedders, TH400 w/TCI Breakaway 2400 stall, Transgo 1-2 shift kit.

Joined: 6/19/2012
Posts: 230
lukesvette said:
Alex, if you are doing some upper end work and going with a new performance carb, I would absolutely make the investment in an aluminum manifold. An Edelbrock performer or performer RPM manifold would do nicely and I do agree with a 650 CFM carb on a slightly "warmed up" 350. You don't need anything bigger than that.

I have seen used performers on Ebay for $60 if you're willing to take a chance with a reputable seller, but again, definitely worth the investment. It is more of a performance design, and will keep the carb and juices cooler than a cast iron manifold.

I have been playing with small block combos for years and Edelbrock makes great manifolds. I have a Performer PM Air Gar on my car now - simply awesome!!

As for the distributor, if your HEI is in good shape, it'l do fine. Check the cap and rotor and make sure you use good quality wires. Thumbs Up

Good Luck!!

Paul



I agree, 650 CFM is all you need. The previous owner put the 750 CFM on mine. I've been looking at changing to an Edelbrock 650 AVS Thunder carb rather than the performer series. The Performer RPM will fit under the hood with a 14X3 filter. The stock air cleaner won't fit.




 



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Build Date: May 7, 1975. 383 w/267 RWHP/310 RWTQ
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10/13/12 10:49am - Reply: 'Re: Good set up for my vette'
PB2
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Portland, OR - USA

Vette(s):
1974 roadster

Joined: 9/30/2012
Posts: 26
Hot Rod Magazine has a great artical on buiding small block chevy's, see the link below.
 
    Good Luck
 
 
    


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10/13/12 3:58pm - Reply: 'Re: Good set up for my vette'
Vetto1974
Former Member
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Hayward, CA - USA

Vette(s):
I have 1974 Corvette, with white exterior and silver interior. It has 350.

Joined: 10/9/2012
Posts: 30
Hi this really helpful. I am glad i joined the club and really learning all about the vette. From the get go, i was looking for ford classic mustangs...but vette is more fun to talk about. And I hardly see classic vette around where I am at. With the set up I am thinking, do I need to do anying on the heads? Regarding the bottom block, when do you know when to change it, or re-built it? Thanks everyone.

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10/13/12 4:23pm - Reply: 'Re: Good set up for my vette'
Case75
Former Member
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, - Canada

Vette(s):
1975 Corvette 383 stroker w/Patriot 190 heads, Eagle stroker kit, Comp 279TH7 cam, DUI distributor, Edelbrock 7116 intake, Edelbrock 1806 carb, Hedman Hedders, TH400 w/TCI Breakaway 2400 stall, Transgo 1-2 shift kit.

Joined: 6/19/2012
Posts: 230
Vetto1974 said: Hi this really helpful. I am glad i joined the club and really learning all about the vette. From the get go, i was looking for ford classic mustangs...but vette is more fun to talk about. And I hardly see classic vette around where I am at. With the set up I am thinking, do I need to do anying on the heads? Regarding the bottom block, when do you know when to change it, or re-built it? Thanks everyone.


I found this site to be a good read...
 


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Build Date: May 7, 1975. 383 w/267 RWHP/310 RWTQ
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10/14/12 11:43am - Reply: 'Re: Good set up for my vette'
daveo76
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Vancouver, WA - USA

Vette(s):
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.

Joined: 8/25/2005
Posts: 830
Here's what I did with mine:

- rebuilt original block with .030 overbore, new pistons, original rods reworked, new Eagle crank, 9.4:1 compression ratio.  Had machine work done by a local shop and he purchased all parts for me.  But I put it all together.  (would not have cost a lot more to have machinist do the assembly, I just wanted to do it myself)

- Bought used Vortec heads (they were used on '96 and later 350 powered GM trucks).  Best production heads GM ever made for vehicles with a 350.  Had those reworked by the same machinist.  

- Speed pro cam (if I were recommending, I'd say go with comp, I did Speed-pro since my machinist could get them for a good price).  Roller rockers, new pushrods (but old would have worked).  

- GMPP aluminum intake.  There are not many intakes available that fit the Vortec heads and also fit under the stock hood of a Corvette.  I think there is an Edelbrock that would have worked as well.  

- Original cast iron "rams horn" exhaust manifolds.  I did a little bit of porting on them myself.  Not a bad option if you want originality, simplicity, low cost, and less heat under the hood.  There are many on this site that say headers are a must, but I like my torquey new motor and feel that headers provide the most gains at higher RPM, where I do little of my driving.  

- Original style Quadrajet carb.  Q-jets are good for our cars when they're street driven.  They have small primaries and huge secondaries so they CAN get good fuel economy, if driven judiciously Wink.  You need to get a good book and a good rebuild kit from a reputable company to get them set up correctly.   I'd recommend Cliff's High Performance for both.  

- I already had true dual 2 1/2" exhaust with Magnaflow mufflers.  I had made this mod a few years before doing my engine and I'm not sure I'd recommend it by itself.  It probably gave me some gains in HP at the higher end, but I feel like I actually noticed a torque loss at the lower end.  Not sure a giant exhaust system is what a stock L-48 needs.  Made it sound better, though!  

So would I recommend the approach I took?  Maybe.  Depends on how into things like this someone is.  There were a lot of evenings spent out in the garage and a lot of $$ spent on a lot of things.  (Example: tools.  Lots of tools that I had to buy to finish this project).  Not sure I saved money over buying a crate motor, but I'm pretty happy with the result.  I've got a fairly high-po original motor, that runs well and sounds and looks cool.  

Good luck!




____________________________________

 

1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
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10/15/12 3:38pm - Reply: 'Re: Good set up for my vette'
Vetto1974
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Hayward, CA - USA

Vette(s):
I have 1974 Corvette, with white exterior and silver interior. It has 350.

Joined: 10/9/2012
Posts: 30
By reading your post it inspire me more to work on my car. But sad to say, I am not quite a handy man. Just cutting the grass sometimes cut myself..I cannot imagine myself doing the work especially the engine. I know it is the best part of owning a car if you will work on it your self. I will work on the interior though. I have contacted a machinist in my area and asking them if they can work on overhauling my engine from bottom to top. I am trying to compare it is worth the money if I buy it pieces by pieces rather than a reputable working on the whole thing engine. For now, because of $$$ contraint, I am looking at changing my carb, intake, cam, lifters, rockers, putting a gear drive, msd box, and headers (full lenght or side pipes). Some one suggested to change the heads too, but will see. I know changing the heads for $700 is worth the money. I think with these minor upgardes I will get extra horses and the car will run better than it is now. After the upgrade, If I am not happy with it, I am thinking putting a B&M torque converter, 2400 rpm stall and a good shift kits, and changing my flexpalte. If I am still happy,then upgrade my rear-end. I am building the engine this way for me and my wife to enjoy it. Is not 300-600 Hp but good enough to cruise and look good.. But,thank you to all, very good suggestions, i am gathering these information

|UPDATED|10/15/2012 12:38:10 PM (AZT)|/UPDATED|


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10/16/12 1:01pm - Reply: 'Re: Good set up for my vette'
B Woogie
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Joined: 7/7/2009
Posts: 32
MSD box/ignition will do no good if you still have the original distributor/ignition system. '74s still had point type ignitions.
Be careful with the cam selection, if you decide to go with a new cam. If you get too aggressive with the duration, you'll have an engine that sounds cool, but won't run for doo-doo. Stay with a short duration cam(below 280 degree), with a higher lift. A little more carb, a good intake, and headers, along with a proper cam will wake the engine up.Thumbs Up


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Every day I learn I know less than I thought I did.
Every time something is made idiot proof. The world produces a better idiot!

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10/16/12 4:30pm - Reply: 'Re: Good set up for my vette'
Vetto1974
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Hayward, CA - USA

Vette(s):
I have 1974 Corvette, with white exterior and silver interior. It has 350.

Joined: 10/9/2012
Posts: 30
Hi, Thank you for additional information. I am going to put in: COMP Cams Xtreme Energy Cam and Lifter Kits. Intake duration: 262, Exhaust duration 270. I am also getting the following: msd distributor assembly: MSD Street Fire HEI Distributors msd ignition coil: MSD Blaster 3 Ignition Coils Caps and sparks plugs and wires.

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