Fellas,

I've combed through the search results on both here and at NastyZ28.com. I've tried to find what the consensus was as far as a cam was concerned, I just want to run it by the gurus and see what you guys think. The combo is for a 70 Camaro (don't shoot me, I still drive a Chevelle :D ).

1970 350 block
stock internals (I've been told freshened up-if need be, will set compression to 9.5ish to 1)
RHS Pro-Torker Cylinder heads w / 64cc chambers
Lunati Voodoo 60102
Edelbrock Performer RPM Vortec
Holley 650 DP
Hooker Comp headers
T-56
4.10

Car is a full weight 70, will have A/C eventually.

The car will be driven quite extensively (long cruises, etc.) and thus I want something that will keep up with a lightly modded LS1. Let me know what you think.

Hopefully you've got a dish piston in order to keep that 9.5 CR target.
Other than that...I like!!! :thumbsup: Have Fun.

I didn't really shoot for any specific horsepower number, looking for maybe 375-400 to the rear. Like I said, the main goal is to keep up with lightly modded LS1s. This combo do the trick?

I didn't really shoot for any specific horsepower number, looking for maybe 375-400 to the rear. Like I said, the main goal is to keep up with lightly modded LS1s. This combo do the trick?

Assuming the RHS heads flow close to GM's Vortecs, I'm sure you'll be in the 375 hp range.

your combo should be good for low 13's possibly high 12's, so i'd say you're in the ballpark depending on what "lightly modded LS1" means.

I didn't really shoot for any specific horsepower number, looking for maybe 375-400 to the rear. Like I said, the main goal is to keep up with lightly modded LS1s. This combo do the trick?

I think you're going to need a little more motor than that to get 375-400 rwhp.

you will see those numbers at the crank, but not at the rear wheels. You will be able to keep up with a LT1, not a ls1.

Sorry...I missed the RWHP reference! :clonk:
I meant 375 HP at the crank is reasonable.

you could stroke it out to a 383...everything the same youd be over 400 hp

stroke it youll never regret it the torque and the feel in the paints is night and day compared to a regular ol 350


id use this cam

http://store.summitracing.com/partdetail.asp?part=LUN%2D60103&autoview=sku

Resurrecting my old thread due to updates:

I got my hands on a 383 short block for a song, and here is my potential setup:

Speed Pro flat tops with 2 valve reliefs (6cc)
SDPC modified Vortecs (good to .550)
should be around 11 to 1 compression
Eddy Vortec RPM intake
Lunati 60103
Hedman 1 5/8'' headers
2 1/2'' X running to Hooker Aerochambers
750 carb
3.23 rear
T-56

Resurrecting my old thread due to updates:

I got my hands on a 383 short block for a song, and here is my potential setup:

Speed Pro flat tops with 2 valve reliefs (6cc)
SDPC modified Vortecs (good to .550)
should be around 11 to 1 compression
Eddy Vortec RPM intake
Lunati 60103
Hedman 1 5/8'' headers
2 1/2'' X running to Hooker Aerochambers
750 carb
3.23 rear
T-56



Unless you planning to run race fuel, the compression needs to drop a point to run that short cam.

Unless you planning to run race fuel, the compression needs to drop a point to run that short cam.

:yes: Vortec heads don't require as much timing as a conventional head but that's still a little too much compression for pump gas.

yeah to the above posts and get atleast 4:11 rear gears. What style of cam do you want? Don't forget that vortecs in most cases have a 63cc chamber.

I want something liveable on the streets, as this will be driven to work on 2-3 times a week. I know, that's a tall order with 11.1, and that's why I made the mention of E85.
E85 has made its presence known in various locations on my way to work, and is a viable source of race fuel.

How big a cam should I be looking at to bleed down some cylinder pressure for 93?
I don't have power brakes right now (most likely Hydroboost in my future) and some bigger gears to take advantage of the T-56.

:yes: Vortec heads don't require as much timing as a conventional head but that's still a little too much compression for pump gas.

I know vortecs :yes: Mine liked 32 degrees.



I want something liveable on the streets, as this will be driven to work on 2-3 times a week. I know, that's a tall order with 11.1, and that's why I made the mention of E85.
E85 has made its presence known in various locations on my way to work, and is a viable source of race fuel.

How big a cam should I be looking at to bleed down some cylinder pressure for 93?
I don't have power brakes right now (most likely Hydroboost in my future) and some bigger gears to take advantage of the T-56.

That would work on E85. I believe the cam required to safely run 11:1 would be more than you're looking for. Something like the Lunati Voodoo 60105. But then that cam is probably too much for your heads.

sounds good.

my vortec combo is 355 10:1, brodix ik 180's, voodoo 60122 hydro roller. 300-36 holley intake, and 3310 holley carb. im hoping for 12's.

aaron

sounds good.

my vortec combo is 355 10:1, brodix ik 180's, voodoo 60122 hydro roller. 300-36 holley intake, and 3310 holley carb. im hoping for 12's.

aaron

What part of that is "vortec"?

the block. thats about it. 96-2000 4 bolt main truck motor.


aaron

just for reference a fellow had a nova with 383 11.4 comp with vortecs that went mid 11's. The cam he used was a cam motion hydraulic with 236-246 @ .050" and around .494/.513" on a 108lsa.

The 383 looks like a much more powerful motor than the 355 you listed. I have to agree, although, that 11:1 is asking for problems. I had a 355 (specs below) that was in a 1972 ventura (same as nova) that ran right with a stock ls1. This particular motor liked gear. I originaly had a 2.73 gear and a 700R4 with a 1900 stall. The motor was really doggy off the line. I then went to a 3.90 gear and it absolutely screamed. I could also run ~2800 RPM at 75 MPH on the interstate and got 18 mpg because of the 700R4. Keep in mind that the 700R4 has a much deeper first gear than a T350 which helped a lot off the line.

355
9.9:1
Vortec heads with Z28 springs
224 230 @.050 .477 .480 lift 110 lsa hyd flat tappet
performer RPM vortec intake
650 holley DP

1 5/8th inch long tube hooker comps

I figure this motor was right around 375 hp compared to other dynoed combos. The 383 you have posted is very similar except with more cubic inches, it should work great (as long as it does not preignite)


Last thing, make sure you incorporate the need modifications to run E85. I am fairly sure you can not just run regular gasoline parts.
Adam