Your pretty close Ben. I suspect a couple typo's in your post. I do the same when I try to type to fast.

279/287- not specified/assuming .006.
218/228 @.050
525/525 w/1.6 rocker ratio
Rpm range is 1500-6000

Just to add.....
There is a lobe for a mechanical fuel pump machined on the cam. Have to use either a roller tip or bronze tip fuel pump push rod.

I basically replicated a build up done by Car Craft mag. back in Feb.04. They got a touch over 400 hp out of a GMPP 350 HO. (keep in mind that this block is already set up for use of a roller cam) I don't know exactly what year blocks can be retrofitted with a roller cam.

Valve springs are Comp Cam - P/N 26918-16 Beehive LS1 style. Direct drop in. No machining. With thread in studs you can run up to about .575 lift.
Sarge

no typos... cut and paste from sallee-chevrolet.. but maybe they have them...

anyway.. I was just curious about what modification it took to get more lift..

now I know.

Sarge, what kind of idle do you have, and even more important, what vacuum at idle? Idle speed?

Ken,
Idle speed is 900 rpm. Vacuum is @ 15 Hg.in.(at idle)
The idle is a little lopey, but doesn't rattle your fillings out of your teeth. lol.
Keep in mind this cam was an "off-road" upgrade for the '96 LT4 330hp engine, so it is calm enough for OBD II w/re-flash programming. And it still gets peoples attention.

I've been playing around with spark timing, it seems to like 10 deg. BTC. I am still messing around with the carb.(edelbrock 1904 Q-Jet.) I'm really getting to hate carbs. I still get a dead spot when I intially nail the gas. Sometimes it will pop back through the carb. Very annoying.
I'm going to inquire on the new edelbrock P/N 3507 "Vortec" ProFlo multipoint EFI, to see if it will fit under the hood. And to see if they can burn a chip to work with this cam. I hope I get a lot of O.T. this winter to afford it. lol.
Sarge

Very interesting. Now I have to think about that. I'm going to change the cam on my L-48, and go to a dual exhaust. This won't happen until spring at least. With that vacuum and idle, it may be a cam that I want. The numbers are more agressive than I would have thought and still have that idle and vacuum. That cam is almost a no brainer for a manual trans. My Turbo400 is another story. My concern is installing a cam too agressive, and needing to change my torque converter. I'm not ready to do that, and really don't want to go that far anytime soon. Too much else to do.

How does it pull at low RPM? How high do you rev before it begins to build torque?

Thanks in advance.

Ken, I am running a cam in my 327 that is 485 lift with 282 duration with a 110 lobe separation. It is REAL lopey and the engine lugs out of the hole. It definitely needs more convertor. From a 20mph roll and drop it into first its a rocket ship. Changing the convertor is another project. I have been working on a 350 with Vortec heads for some time. Money constraints keep it at a slow pace. when it is completed, the 327 will go into my 64 El Camino.
Reid '72 T-top

Sarge81 - I'm going to put the vortecs on within a month or so and have a few more questions, if you don't mind.

What casting number did you go with? I heard the 906's are not good and to use 062's.

Did you have any additional machine work done on yours? I heard you can't get much better than stock.

I'm assuming your running headers - any spark plug issues? If so, did you go with shorter plugs and what's the #?

For anyone interested, City Motor in Dallas has vortecs complete for $360 no core or $310 w/

Here's a link to a chevy dealer with more details
http://www.sallee-chevrolet.com/Cylinder_Heads/Vortec.html

Some sights claim the vortecs are only good up to .42 lift while others including Summit Racing guarantee them at .48 max lift - all state they are stock springs. What's the deal? I'm looking at the Comp Cams xe262 with a max lift of .469. Does anyone think this would be a problem with the stock springs?

|UPDATED|8/23/2004 8:28:36 AM (AZT)|/UPDATED|

I will get back to you guy's either tonight or tommorrow afternoon with some answers for your questions.
Messed up day today.
Sarge

76x said: while others including Summit Racing guarantee them at .48 max lift - all state they are stock springs. What's the deal? I'm looking at the Comp Cams xe262 with a max lift of .469. Does anyone think this would be a problem with the stock springs?

my understanding is that .475 is the safe recommended max lift with the heads in the stock configuration

but you can modify them to get it higher..

your .469 should be just fine

76x,
As long as your lift doesn't exceed .480 lift the stock vortec springs should be fine. I have "062's", the other heads "906's" are for 3/4-1 ton trucks. They flow about 20 or 30% less. I had the heads machined down and threaded for a set of ARP screw in rocker studs. The original press in rocker studs were pulling loose out of the cylinder head. I am running full length headers. Spark plugs are R44LTS, Gap is .045". I run the equivalant in Bosch platinum. These plugs have a lot longer thread reach than a regular small block head. So make sure that the auto part store don't give regular small block plug like they did to me. I found out this when I went to index my plugs while the heads were on the bench. The tips were recessed about half way back in the plug hole. I had the run a tap through the plug threads to knock all of the carbon build up out.

Ken,
This cam's operating range is listed at 1500-6000rpm's. My 1st gear ratio is 2.43 and the rear end is 3.07 which = 7.46. Not the greatest for out of the hole launches. The car is comes out of the hole pretty good if I slip the clutch a little and it starts pulling hard between 2500-3000rpm's. If I ever get this carb straightened out or better yet fuel inj. installed I know this will be decent out of the hole. What gear ratio is the rear end of your car?
Here is some dyno #'s from Car Craft April 2004. I replicated this build up "Project Humble Pie". This motor and mine are the same."Gmpp 350 HO 330hp."
RPM - TQ - HP
2600-385-191
2800-392-209
3000-399-228
3200-409-249
3400-419-272
3600-425-291
3800-425-307
4000-425-323
4200-428 -342
4400-425-356
4600-420-368
4800-415-380
5000-407-387
5200-397-393
5400-385-396
5600-375-401
5800-360-397
6000-338-386
Avg. 401-326
Hope this helps out. Feel free to ask questions. I will answer to the best of my knowledge.
Sarge