Hey guys I have a 1985 Trans Am

Specs:
305 Block
350 Vortec heads
Power Plus Cyclone Intake

I ordered a 650 Edelbrock Performer AVS carb. That's on its way.
Also I am going to be putting on Hooker 2460 headers. With a 2.5'' no cat on the back.

I'm looking to Cam the thing as well. Thing is I'm not savvy on cams.
I was looking at the EBL-7102, But it seems that nobody is fond of them.
The Engine does not have a roller cam.

The Car is a daily driver. Its also used extensively in SCCA Autocross. I want a aggressive idle but i need the performance between 1500 RPM - 6000 RPM. (The highest I take the car is 5500 though).

I appreciate any help on this Thank You in advance.

 

thats a pretty aggresive cam. whats your rear gear ratio? how much street driving do you honestly do?

 

Check out the link below, it is a 305 with Vortec heads.

http://www.popularhotrodding.com/eng...s/viewall.html

 

Thanks for the help rear gears are stock 3.23 i believe. Connected to a T-5 tranny.

Thanks spurgeon76 i looked at that article really helped. I'm looking at a voodoo cam with similar properties as the one in the article. I'm wondering though if the stock Vortec rockers and valve springs will hold up to it?

Here's the link to the cam.
http://www.summitracing.com/parts/LUN-60103LK/

 

No. Absolutely not. The rockers maybe, although the slots will probably bottom out on the studs; but the springs don't stand the chance of a snowball in Hades. Worse yet, the retainers will hit the guides long before the valves are fully open. The engine probably won't even make it to being started up before parts start breaking.

That's too much cam for that motor anyway; or more accurately, a 305 isn't enough motor for that cam. You'd do better keeping it a good bit smaller than that. You can do enough machine work and/or buy springs and retainers and such that would allow it to "fit", but ... that's just too much cam.

For autocross you need plenty of low-end torque to come out of those tight turns. Big high-RPM power isn't worth much because you aren't ever going fast enough. Same for daily driver applications; it's not alot of fun having a motor that "sounds" like a race car, but minivans beat it from stoplight to stoplight.

The XE262, or the 60101, are about right.

 

I have the XE262 on my rebuilt motor right now and it seems just about perfect for what I did to the engine. The motor is still breaking in, but so far so good.

You can up the cam to the XE268, but will be getting to the area of needing some good head work, or aftermarket heads.

 

i have to agree. that cam is way to big. the voodoo cams are listed in an advertised duration that is smaller than what they really are. so you would already be getting too big of a cam than you expected. over-camming is a rookie mistake. id go with a cam of around 262-272 advertised for what your doing. however, advertised duration means little. this is probably confusing? learn to read cam specs at .050 duration and youll see the difference.

 

I would go with an xe256 or xe262 depending on the compression ratio. The 262 should sound pretty raunchy in a 305 and still be tolerable. It's what I have in my 350 and I wish I had gone bigger, but it's got its perks too. Thing has MOUNTAINS of torque from 1200+

Do we know that he doesnt have a roller block?

 

i appreciate all the help guys. i've looked it to the heads i have. i read that they will only accept .470 of lift due to its valve seal or i will pinch the seal. these heads dont have the tin and o-ring seal.

So if I was to get a cam that says at or below this id be ok. along with a cam that doesnt exceed 262-272 at .50 dur?

On top of the question if an cam says it has .470 of lift is there any way that part go past that point unless the thing decides to break.

thanks for any help on this. sorry if i dont know what im talking about.