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9/30/14 9:37am - Reply: 'Re: new suspension and brakes'
cinor Lifetime Member
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, - Canada

Vette(s):
1975 L48 Stingray 1992 LT1

Joined: 12/24/2013
Posts: 277
Was happy to see your post. I also have a 75 that I am going to tie into this fall.  I've been waiting all year to get started.  I am going to completely replace the suspension and was going to come to this site for suggestions as to what would be my best bet, I was hoping to update to the newest bestest possible without worrying about converting or modifying anything so suggestions would be awesome on this.  I too get a hard time about my cars (from my mother) but I remind them that they told me I needed to get  a hobby.

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9/30/14 7:25pm - Reply: 'Re: new suspension and brakes'
Sarge81 Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Joined: 12/3/2001
Posts: 2376
gveld said: Thanks for the compliments from all . Most people say I am crazy to spend so much money fixing up a 75 vette . Those of us who own these cars do see the value in them and love them for what they are an American Classic .   

Nice ride man. Yeah I agree, many will think your nuts for sinking big money into a "rubber bumper" car. But it's your car and it makes you happy. That's all that counts. 

I won't even tell you the stupid amount of money I've sank into the '81 over the years. I don't care, I just know it makes me happy. Thumbs Up



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GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975




Click here to see more pics of my Vette on CarDomain.


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9/30/14 9:01pm - Reply: 'Re: new suspension and brakes'
gveld
Former Member
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, - Canada

Vette(s):
1975 Orange Flame . I have owned car for 20 years now . Had 44000 miles when I first bought now just about to hit 60000. Had new motor built in 2012 upped hp to around 350 . New paint and front and rear fiberglass bumpers also 2012 .

Joined: 2/28/2014
Posts: 20
Thanks again for all the encouragement and compliments  I have received on my car.
Hard to believe an other year of driving the vette is almost done . Will get one more week next week when I am home from work and put to rest for the winter . All in all was a good year did get upgrades done that were planed for year and got to go to drag strip to see all the improvements pay off.
Stock 75 vette with 165 hp 1/4 mile 16.5 to 17 seconds so to get down to 14.17 I thought was pretty good .
Next maybe change out 3.36 gears for 3.73 and see times drop even more . Any advice on that would be welcome ?  

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10/1/14 1:45pm - Reply: 'Re: new suspension and brakes'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19449
gveld said: total rebuild of turbo 400 adding 2800 3000 stall convertor .

Change the converter to one that isn't so high a stall...your 60ft times will drop dramatically. ET should come down some, too. That's a LOT of stall for a street car. A lower stall would complement a 3.73 gear better, too.
My old '72 ran 12.20s all day, and drove around town too. 3.73 gears, 2200 stall converter, and an engine that was barely street-able....we stole it out of our circle track car.....Embarrassed  LOL
355 small block, 13.1 pistons, roller cam, Strip Dominator intake, and plenty of blood sweat and tears made that '72 the quickest street car around at the time(late '70s). Thumbs Up






|UPDATED|10/1/2014 10:45:45 AM (AZT)|/UPDATED|


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Joel Adams
C3VR Lifetime Member #56    
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             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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10/1/14 8:47pm - Reply: 'Re: new suspension and brakes'
gveld
Former Member
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, - Canada

Vette(s):
1975 Orange Flame . I have owned car for 20 years now . Had 44000 miles when I first bought now just about to hit 60000. Had new motor built in 2012 upped hp to around 350 . New paint and front and rear fiberglass bumpers also 2012 .

Joined: 2/28/2014
Posts: 20
Thanks for the advice Joel . The converter was put in on the advice of the shop that built my motor . They said more rpm to rear wheels should help to launch off the line better . I do not have any spin on starts as all seems to hook up nice . Going back to transmission shop next week for service will chat with him about this as well . Thanks again 

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10/1/14 10:59pm - Reply: 'Re: new suspension and brakes'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19449
Well...is this a drag car that sees occasional street duty, or a street car that hits the strip every now and then?
Gotta set it up for the best performance/durability for it's primary purpose. Stall speed on a "race" car needs to be set for when the engine is up on the cam, meaning, where the cam is working to make torque.
What cam/compression ratio does the engine have? A big cam sounds neato, but without the mechanical compression ratio, it's only good for that....sounding kewl.
If the cam is all in by 3000 rpm, a 3000 stall converter is pretty useless.
If the cam don't start really making torque until ya hit 4500rpm, a 3000 stall converter would be appropriate....but that combination would be a pita to drive on a regular basis on the street.
Torque is for drivin....horsepower is for braggin....Approve


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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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10/1/14 11:59pm - Reply: 'Re: new suspension and brakes'
gveld
Former Member
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, - Canada

Vette(s):
1975 Orange Flame . I have owned car for 20 years now . Had 44000 miles when I first bought now just about to hit 60000. Had new motor built in 2012 upped hp to around 350 . New paint and front and rear fiberglass bumpers also 2012 .

Joined: 2/28/2014
Posts: 20
Hello again Joel . I do not have all the specs with me as I am not at home right now I am working out of town. I do know it is a comp cam high energy 262 peak torque is around 415 ft lbs at 4000 to 4500 rpm .Peak hp is supposed to be around 5300 rpm and 350 hp . The compression is around 10.25 to 1.
The car is a street car that I have only taken to the track on one occasion just to see what type of times it would produce .   

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10/2/14 1:17pm - Reply: 'Re: new suspension and brakes'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19449
gveld said: The compression is around 10.25 to 1.


This is the key...10.25.1 would be IDEAL for that cam. Nice choice on that, for sure. Thumbs Up You could go a little more radical on the cam, but vacuum would be seriously effected.
If the specs are close to what you posted, then that would change my mind on what ya need some, but I still think the converter, IF it is indeed that high of a stall, could be lowered some and improve your 60ft times....especially if you go with the 3.73 gears.
Has the engine been dynoed, or are we "guessing" at the HP/Torque?
Sounds like you have a really nice combo there, anyway. Shouldn't take much to get it into the lo/mid 13s, but remember...the faster it goes, the harder it will be to drive(comfortably) on the street....our '72 mentioned above would barely even start on pump gas....we had to use aviation fuel in it....which gets expensive real quick!LOL




Yup....those ARE wheelie bars on it! Thumbs Up

|UPDATED|10/2/2014 10:17:28 AM (AZT)|/UPDATED|


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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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10/2/14 8:48pm - Reply: 'Re: new suspension and brakes'
gveld
Former Member
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, - Canada

Vette(s):
1975 Orange Flame . I have owned car for 20 years now . Had 44000 miles when I first bought now just about to hit 60000. Had new motor built in 2012 upped hp to around 350 . New paint and front and rear fiberglass bumpers also 2012 .

Joined: 2/28/2014
Posts: 20
Thanks again for your help Joel this is all new stuff to me as I have never rebuilt a car before .
 
The motor has not been dyno tested because nearest place to me would be around 500 miles away . The numbers I am using are the dyno sheet that came with the cam so may not be right on the money . I have checked 1/4 mile times for stock 1970 LT 1 vette  with 370 hp and 3.73 gears times around 14.2 to 14.4 so I am thinking my HP should be close to this .
 
The stall convertor does break my tires loose at around 2300 to 2400 with the foot break on . I have read that foot breaking will not give exact number for convertor but will be close . I have not figured out the exact flash point on the convertor.     


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