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General L98 cam ?

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Old Jan 2, 2006 | 03:48 PM
  #1  
AZZ28's Avatar
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Joined: Mar 2005
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Car: 1990 IROC
Engine: l98
Transmission: 700r4
General L98 cam ?

(sorry its a little long) This is a general question, I know there is no definite answer but I would simly like to here back from someone who has experience with this set up.

Anyways, I am currently an engineering student at ASU, until I graduate I will not have the time, money, or ability to really build my '90 IROC to the extent I would like. Cosequently after a few mods I decided from then on I would only add parts I knew I would want to retain on the final car, like my Koni shock and some other stuff. Along those lines I also decided not to touch the motor since the final one will share no major parts.

Lately however I was considering installing a cam. I figure they are relatively cheap, my valves seals are somewhat worn out, it wouldn't hurt to replace the springs, and I am going to be driving that L98 for at least another couple years.

FINALLY MY QUESTION: Asuming I do the research and choose the most absolutely appropriate gind that would fully utilize the stock top end, what kind of results could I expect? I know the heads runners and base are all very limiting. I would greatly apprecite some insite into how much THE CAM ALONE would improve the power band. I would not swap any other top end parts simply because of cost. I would also not what to re-tune the prom for the same reason. Thanks in advance for any opinions/knowlege anyone can offer.

Current set up: Hooker shorties and 3" Y-pipe, magnaflow cat, SLP cat back, crank pulley, AFPR, K&N, Accel wires Bocsh plugs, fresh 700-R4
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Old Jan 2, 2006 | 04:39 PM
  #2  
Sonix's Avatar
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From: Calgary, AB, Canada
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
You don't want to bother trying to get more 'top-end' as the restriction there is more the runners then the cam. A cam swap for you, would be more to improve lower end, that can avoid machining as well.

I'm not very smart w/ respect to computer tuning, so I don't know if you have speed density or mass airflow injection, which kinda decides if you'll need to burn a new prom.

I would guess if you changed nothing but the cam (and valve springs), you could see 20HP or so, on the lower end if you didn't want to re-program...

Perhaps start looking into a cam grind. Comp has the computer friendly series, and you can check on other boards here to see how much duration you can have before you need to burn a new chip...
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