what cam for 86 lb9?
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From: Villa Park, IL
Car: 1986 Iroc z28
what cam for 86 lb9?
Hi all.. I'm Thinking of doing a cam swapto get some more hp... What cam do you suggest. Car has smog deleat as well as no ac. It must pass emissions. ( just did ). Other mod listed in sig listed under the z28. Also w/sugested cam will i need prom tuning?
Thanks to all in advance.
Thanks to all in advance.
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From: Montreal\Quebec|Canada
Car: Camaro Z281991 Engine: 5.7L/350 TPI Transmission: TH700R4 ··································· Car: Acura CL 1998
Engine: 3.0L/183
Transmission: 4 spd auto/OD
Senior Member
Joined: Sep 2001
Posts: 968
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From: Montreal\Quebec|Canada
Car: Camaro Z281991 Engine: 5.7L/350 TPI Transmission: TH700R4 ··································· Car: Acura CL 1998
Engine: 3.0L/183
Transmission: 4 spd auto/OD
thats odd, I specified 1986 ..
Check- www.compcams.com
XE256H
XE262H
either 110 or 112 LSA
112 is better for fuel injected engines.
Check- www.compcams.com
XE256H
XE262H
either 110 or 112 LSA
112 is better for fuel injected engines.
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From: parishville NY upstate
Car: 86 IROC-Z
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.42s/posi/disc
im also going to be upgrading my 86 lb9 and want to know whats the largest cam i can put in this engine and get the most out of it.
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From: St. John's, NL, Canada
Car: 1988 Trans Am GTA
Engine: 383
Transmission: 700R4
Why not swap in a cam out of a newer 305 TPI?? Preferably out of a 5-speed car. They were making decent numbers in the '91 and '92 model years, and this would make for less computer tuning.
What a minute, as I was typing this I just answered my own question. The computers were different, so it might not work that great.
What a minute, as I was typing this I just answered my own question. The computers were different, so it might not work that great.
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From: West Des Moines, IA
Car: 2008.5 Mazdaspeed 3 GT
Engine: 2.3 DISI Turbo
Transmission: 6 speed MT
Originally posted by speed88
Why not swap in a cam out of a newer 305 TPI?? Preferably out of a 5-speed car. They were making decent numbers in the '91 and '92 model years, and this would make for less computer tuning.
What a minute, as I was typing this I just answered my own question. The computers were different, so it might not work that great.
Why not swap in a cam out of a newer 305 TPI?? Preferably out of a 5-speed car. They were making decent numbers in the '91 and '92 model years, and this would make for less computer tuning.
What a minute, as I was typing this I just answered my own question. The computers were different, so it might not work that great.
Personally, I have the Summit 1104 cam in my '86 LB9, but... it would be a bit big for a non emissions exempt car though, so I'd recommend probably the summit 1102 for your car... less duration and tighter lobe separation than the 1104. Summit Chevy cams click here. Any cam at all will require some amount of tuning to get the full benefit of the change, so either plan on some tuning, or expect lackluster results.
Just for reference, I put down 192.1 RWHP and 242.8 RWTQ with no cat, SLP runners, the 1104 cam, a CAI, and a custom tune. Not bad for not even having headers...
Last edited by bnoon; Sep 10, 2004 at 10:43 PM.
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