Did the auto LB9's in 1991 have the peanut cam or did they all have a bigger cam, not just the 5 speeds?

 

what the heck is a peanut cam or what does it mean? someone told me that about my car and wouldnt explain it to me

 

it's a low lift, low power cam. my 88 Formula has one in it still.

 

zeph....is your car a t5 stock?

it should have the hotter cam in it.

 

It was an auto stock. I put the T5 in it about 2 or so years ago.

 

Soo is that yeah?

 

"Peanut cams" came in 88-89 TPI 305 automatics, all 86 TPI's, all LG4's, and all TBI's. The 90-92 TPI cars all have the better 350 cam. I dont know about 87's.

Its specs can be found in the Camshaft tech article on this website, but its really small, hence the name. The lobes are about as small as the bumps on a peanut.

 

from what ive read all auto 305 tpi's had the peanut cam and the 5 speed tpi with the g92 option got the hotter 350 cam. Also if you look at your tach the ones with the hotter cam redline at 5500 when the peanut cam cars redline at 5K. Also look at the hp difference between the auto and manual tpi 305 cars the manual has a little bit more power and its not do to it having a manual because there tested at the fly not at the wheels.

 

85 Auto TPI had the hotter cam.

 

Hotter cam yes, with the shitty computer. 86 got the better ecu with the peanut cam.

 

this is odd, i have raced a handfull of 91/92 lb9's with the "hotter" cam. and i usually beat them by a little bit. why? only 1 other lb9 has beat me it was a 85-89 iroc. dont know exact yr, but he took me by about a 1 car. he may have lied and really had a 350?- could my car possiblly have the bigger cam even with the auto?

 

Just your gears alone (3.73) would probably make up for a weaker cam, when you consider 91-92 cars are running a 3.23 max. Other than that, from your sig you would be 30+ hp over stock anyway. The difference in cams isn't exactly extreme; any stock cam in these cars is pretty small to begin with, it's just the peanut cam is the smallest.

 

Yes, we've all read that, and it was proven wrong about 3-4 years ago. All 90-92 305 TPI's got the 350 camshaft. This was verified by several people who pulled out their camshaft and measured it.

The 25 HP difference between 305 TPI's with the 5-speed G92 package, and 305 TPI's with automatics and 5-speeds without the G92 package, is due to the G92 package consisting of the dual cats, and larger y-pipe and cat-back exhaust (2 3/4"). The single cat cars have the same small exhaust as the TBI cars (2 1/4").

 

Between 85 and 86 there was 25hp lost, and the engines are pretty close to identical except the cam being the 179/194 and the 202/206; that's over 20 degrees more intake duration compared to the peanut cam. IMHO that's a pretty big deal.

 

Jesus well I dont know, my car redlines at 5000rpm......so why does it make 205hp instead of 190hp?

 

this is a dumb question but just want to know what others input, but is the difference in performance wise from the LB9 peanut cam to the hotter L98 cam or even a higher preformance cam than the L98 reasonably noticable?, I still have the peanut cam , so I wouldn't really know

 

What do you guys consider a redline? Mine redlines at 6000rpm.

 

sorry, i should have specified, i was refering to when my car was stock, all it had was an ads superchip, airfoil and a k+n. oh yeah sorry im not trying hijack the post guys

 

With a full bolt-ons car it's the next logical step. Past that, if the intake is being pulled (esp if it's a roller cammed car) I'd put one in if I had the time. Even the 9C1 TBI motors gained 25hp with the L98 versus the peanut cam. If you consider that's on an induction crippled engine (lousy exhaust and marginal intake) It should improve significantly more with induction mods.

 

?- WHICK AFTERMARKET CAM IS CLOSET TO THE L98 CAM? COULD ONE BE BOUGHT FROM GM? ALSO ANYBODY KNOW THE CODE FOR THAT ON THE BUILD SHEET.

 

Actually, since you are in Canada, that is 6K in Canadian RPM's, which is 5500 RPM in the USA.

 

LOL!! Seriously, why do you guys call it a 5500 redline if the yellow starts at 5500 and it redlines at 6000rpm?

 

Well, yours is a 6K redline (obviously) My two tachs (6K and 8K) are 5K and 5.5K redlines.

 

Hmmm........I thought all 305 tpi cars with the bigger cam were a 6K redline like mine. Learn something everyday.

 

The 85 is a 6K redline, just like the L69 Cars, in fact the 1985 TPI 305 IS a L69, just has TPI instead of the Q-Jet. The 90-92 305 TPIs all got the L98 Camshaft and a 5,500 RPM redline.

 

uh soo 87 it seems is an odd ball year. i believe the gta shifts at 5000 rpm, but redline is 5500. digital dash doesnt help.

 

Sorry, I guess I need to brush up on my cam specs, I thought the 'peanut cam' was more in the 190ish range for intake. It's surprising that 23 deg of intake duration only gains 25 hp!

 

My friend who was asking the question has a 91 firebird with the lb9 auto and his car redlines at 5k.