Cam Question

[lilredjeep91]

i have a question about cams, i have a 97 trans am lt1 m6 with 1.6 roller rockers, full exhaust with long tubes, cold air intake,port/polished manifold and 58mm tb ( manifold/tb arent on yet ) im still running stock heads just with the 1.6 rr my question is whats a good size cam i can run with this set up and stock heads ? how big of a lift can i go ?

[LTb1ow]

LT4 hot cam. lol

The 305 I think is a the biggest you can really go.

[camaroAL]

the biggest cam is not always best. u need to base ur cam purchase on many things, such as comp. ratio, desired rpm, gear ratio, would u like more tq, or more hp, stick or auto, and so on. also be prepared to do matching valve springs and other improvements

[lilredjeep91]

well the mods are full exhaust with long tubes and ory, 4.10 gears, its stick not auto,1.6 rr, cai, and i also have but not on yet a port/polished manifold and 58mm tb what do you guys think the best cam would be for the quarter mile ?

[LTb1ow]

Well what are your plans for the car?

I would stick a higher converter in there and see how the car runs with that.

[WildBillyT]

Well what are your plans for the car?

I would stick a higher converter in there and see how the car runs with that.

The car is a manual transmission.

[LTb1ow]

Doh, dunnn how I made myself see its an auto.

[FlyingDutchman]

i found this the other day because i was wondering the same thing

http://www.compcams.com/Camquest/

you need to input some information but it doesnt hurt to try

besides, its FREE lol

[WildBillyT]

i found this the other day because i was wondering the same thing

http://www.compcams.com/Camquest/

you need to input some information but it doesnt hurt to try

besides, its FREE lol

It actually looks like they bought the Desktop Dyno 2000 code. I've been playing with it.

[Pampered-Z]

What are your plans for the car? street manners? Performance? future mods? Should I assume emission testing isn't an issue because you have long tubes? or are they passing?

In general terms ( lobe design has a big effect), lift is actually less important then duration for making power. It's more important to have the valve open longer then higher for top end power, for torque, you use more lift, less duration. But if your furture plans include heads, you might as well go a bigger now.

again, generally, for stock heads and looking street/strip, you want to look at cams in the 220-230 intake duration and 230-236 exhaust duration and makes power in an RPM range suited for your stock bottom end. The big cams like the 306 or GM847 need free flowing heads and the engine needs to be spun up high to make their best power.

The most popular street/strip cams I like are the:

Best street cams, if you just want to add some tire spinning torque: ( 310-320 HP )

Crane "503" slightly better then a GM Hotcam, slight increase in power.

Lingenfelter 211/219 cam.

Street Strip: (320-350? HP)

comp cam "305" = 220/230, .510/.510 on a 112 LSA
or
comp cam "305" = 220/230, .510/.510 on a 114 LSA,

** 112 more lope at idle. **

Comp Cam "230-112" = 224/230, .502/.510 on a 112 LSA. This cam on paper looks to be smaller bases on intake lift, but utilizes more aggressive lobe ramps and a bit more intake duration.

If ported heads are in your future, and street manners are far less important then performance, (350+ HP)

Comp Cam "306" = 230/244, .510/.540 or GM847 cam.

Here is the GM847 in a car that isn't a daily driver any more!

http://www.97transam.com/97ta-cam.php

[deadtrend1]

LT4 hot cam. lol ...

whys that funny?

[lilredjeep91]

pampered-z that really helped me out alot thank you