Cascade Crew

86toy · Posted: Tue Feb 02, 2010 2:15 pm Post subject: camshaft selection.

i want to upgrade the cam in my 86 transam,its a tpi car, what cam should i use? im aware that its a roller cam.
would a zz4 cam or lt1 work with the stock rockers arms? im upgrading the exhaust and will upgrade air intake and instal headers,700r4 already has a shift kit it shifts at 2300 rpm by itself, rear gears are 3.73 aussie possie. Confused

iansane · Posted: Tue Feb 02, 2010 4:39 pm Post subject:

I used an lt1 cam and it woke up my old lb9 quite a bit. Bonus is I picked it up on camaroz28.com for like $10. Very Happy

It's nothing amazing but it helped I think? You'll be spending a heck of a lot more for a more aggressive cam.

chevymad · Posted: Tue Feb 02, 2010 5:58 pm Post subject:

Are you sure that its a roller? Stock engines didnt get roller cams until 87.

86toy · Posted: Tue Feb 02, 2010 6:02 pm Post subject:

i assumed it is. its a 86 transam 305 tpi i was told they where roller motors am i correct? Confused

chevymad · Posted: Tue Feb 02, 2010 6:37 pm Post subject:

No, oughta still be flat tappet. As I said.. 87 is the first year for roller. 86 was first year for 1 piece rear main seal. I have a 305 out of an 86 and its definatly flat tappet.

86toy · Posted: Tue Feb 02, 2010 6:52 pm Post subject:

ok thanx what type of cam should i use then with stock springs and rockers? max about 450 lift?

rjmcgee · The Hammer Joined: 08 Jan 2004 Posts: 2328

Quasi-Traction · Posted: Tue Feb 02, 2010 9:20 pm Post subject:

also, be sure you do lifters at the same time you put the cam in.

86toy · Posted: Wed Feb 03, 2010 6:15 am Post subject:

Okay let me clarify LOL ive had 30 years working on cars, what im asking is. what's the max lift and duration and what lobe center ,can i use with the stock tpi setup, and no stock cam ISNT 450 lift lol. im planning on mounting the knock sensor on fire wall so that i can run a gear drive.

Dewey316 · Posted: Wed Feb 03, 2010 9:08 am Post subject:

max lift varries, lots of people will pull the rocker studs out, before the lift needed to make contact. IIRC the max lift stock is about .480.

The centerline doens't matter so much, but to keep the computer happy, the to keep the LSA at 112 or higher.

86toy · Posted: Wed Feb 03, 2010 9:28 am Post subject:

thanx lama!!!!!!!!

Dewey316 · Posted: Wed Feb 03, 2010 9:35 am Post subject:

just for some other 305 cam help info.

I have a 204/214 .447 .447 112 cam in my car, you can see the dyno results. it put about 230hp down to the wheels.

that gives you at least one reference point.

IF, I was doing it again, i would get not too much more agressive of a cam, as far as I would go on a computer controlled 305, would be in the 210-212 intake range, and try to get lift about .475, and on a 112 or 114 LSA.

That should be good for 250-260 HP at the wheels (figure right about 300 at the crank)

If you cam beyond that, I would think the computer make not like it too much, and will require a lot of tuning. As it is, even with my cam, I spent a lot of time tuning it in. I just want to make sure you are aware, that with computer controled cars like ours, putting a cam in, you will need to custom tune it, and get all the equipment to burn your own chips.

Quasi-Traction · Posted: Wed Feb 03, 2010 11:52 am Post subject:

These might be a couple good picks for you:

http://www.summitracing.com/parts/CCA-12-388-4/

http://www.summitracing.com/parts/LUN-301A4LUN/

86toy · Posted: Wed Feb 03, 2010 12:30 pm Post subject:

that lunati is nice, i used a lunati in my 350 zz4 i built for my 86 z28 carb car. it worked awesome.