did all tpi peanut cam have a 4000 rpm because my 86 305 tpi book reads that it has 210 hp at 4000 rpm and has 270 tourqe at 3200 rpm. and i see on this site that they say all lb9 auto has the 190 hp but i think it just the camero because every other website has the 86 tpi at 210 thanks

 

As far as I know the 86 TA came with 190 HP (due to the peanut). I looked at another site and it also said 190. Since I have the peanut 86 TA as well does anybody know foir sure if it had 190 or 210?

-Max

 

My '86 IROC used to have a peanut cammed 305 TPI and it was rated at 190. Trans Ams and Camaro's have very few differences, mainly appearance-wise. There are a few technical differences from time to time, like exhaust systems and intakes, which cause one or the other to have a few more/less HP and TQ now and then. The difference is not enough to be significant. Are you sure you're not looking at a 1986 350 TPI, or something else? These are Camaros and are extreemly rare (L98). Chances are you'll never see one. Only LB9's (305 TPI) are peanut cammed, even then, some got the hot cam, usually in the later years with the 5-speed. 305 TPI automatics are the ones to look for to have the peanut. If your book truly says that, get another book. There's far too much info on these cars in thousands of places to say they're all wrong and to settle on one. It's a possible typo. As far as I know, the '86 305 TPI automatic (if an '86 manual exists) is 190 HP. If I'm wrong anybody, please correct me.

 

what is the name of the other site because every sit ei looked its 210 hp at 4000 rpm

 

Damn it now I'm confused. I was sure the other site I looked at said 190 HP (forget the adress), but now when I looked in some other places they all say the 86 5.0 TPI was 210 hP and 270 TQ (I thought it was 190 HP 285 TQ)

Look at this site:
http://www.rpi.edu/~serpam/firebird/...rformance.html

Can anybody clear this up?

-Max

 

Yes.

All Pontiac literature I have seen (from GM) shows the HP listed at 205. This number, although published, is incorrect. All 86 LB9 engines, including the ones in the Pontiacs, had the peanut cam. At best, it has 190hp. It should have been listed at 185.

NUN, you have more than beat this subject to death. You have 2 choices:
Dyno your car
Check your cam

Ill tell you now, your car has the peanut cam unless someone during its life changed it. I dont see what the big deal is anyway, 5, 10, 15 hp isnt much of a difference, especially when you throw production tolerances into the mix.

 

i told you that it has 210 hp but it might still have the peanut cam do to all the tpi cars having the rpm at 4000. i would change the cam anyway you will be looking at 230 hp and 300 tourque. by the way what exhaust system do you have mine came with a 3 inch y pipe all the way to the converter. these cars were only exports. if you live in california you have the emissions problems

 

o bye the way are cars are so slow in q-mile because of the borg warner australian 9 bolt 2'77 posi. in 85 the tpi 305 ran the q-mile 15.00 flat with the 10 bolt 3;42 gears

 

I think you need to put the books down and take two steps back.

 

The 85s are faster not just because of the gears, but also because they had the L69 cam. In 86 they put the peanut cam in ALL the LB9s, hence the drop in rated HP. 87 was the first year for stick LB9s and i *think* they got the L98 cam, but the LB9 A4 continued to have the peanut cam.
As madmax says, you are beating this into the ground. It is not really up for debate whether you have the peanut cam or not, all 86 LB9s did, thus the lower HP. You really think the general was making 2 versions of the LB9, one for camaros, and a hot one for TA only? So believe whatever you want to, but this is theonly thing we can respond to these posts with, because it is what we believe as truth. There are so many sources of mis information about these cars out there that of course we aren't gonna believe you w/o physical proof, of which we do have plenty that the 86 cars were significantly slower than the hot cammed 85s.
As proof it isn't just the gears, my heavy as sin 92 vert has 2.73s and LB9 and i pulled 15.1 @ 90.6. Granted my SD LB9 is a little stronger than a MAF car, but you still will not see a stock 86 TPI come near that time because they have the peanut and my 92 has the good one (which is another perfect example of common misinformation out there.)
...ed

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Ed Maher - Moderator @ The Carb Board
92 Z28 Convertible - Quasar blue / Tan top
LB9 4L60 GU2 G80 - stock, soon to be sleeper
-=ICON Motorsports=-

- Definitely prototypes, high powered mutants of some kind. Too weird to live, too cool to die

 

85's had a better cam. YES the 86's all had the peanut cams...so did the 87's for that matter, but they got a few more ponies out of it because of the roller setup.

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Mike Metzler (Desert86Roc)[*] Webmaster: SpeedWorldMotorplex.com[*] Click Here For 86 IROC 305 TPI (406 build in progress) Page

ET's @ 1250 ft[*] 14.28 @ 95.461 mph (uncorrected, NOS, no headers)[*] 15.365 @ 86.785 mph (uncorrected, headers, no NOS)
<><

 

you guys might be right about the 86 305 tpi trans am ws6 has the peanut cam but it's still rated at 210 hp but the tourqe dropped to 270. like i said before my car is stock with 36 000 kilometres and killed a 305 tpi trans am 1987 by 4 car lenghths

 

Just because you raced somebody and won doesnt mean a thing... Maybe they couldn't drive worth a crap, or had something wrong with their car.

Have you dynoed your car? Or weighed it an run it at the track? You can debate all day long, but until you measure your car's performance, you will never know.



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Mike Metzler (Desert86Roc)[*] Webmaster: SpeedWorldMotorplex.com[*] Click Here For 86 IROC 305 TPI (406 build in progress) Page

ET's @ 1250 ft[*] 14.28 @ 95.461 mph (uncorrected, NOS, no headers)[*] 15.365 @ 86.785 mph (uncorrected, headers, no NOS)
<><

 

uhg - the peanut cam is the most evil thing GM ever made - i guess you don't realize it until your engine doesn't have it but then you buy a long block with one and your car then feels like it would be good race against your parents minivan!!!

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91 z28 lb9 5 speed - hooker 1 5/8 headers - high flow cat- full 3 inch exhaust - home made ram air - tpis airfoil - dual chamber flowmaster - Stage 2 Jet Chip and 160 stat - 8 mm Msd plug wires - 55,000 v hypertech coil/rotor/distrib. cap - Mac. White face gauges - lots of sound system crap...

 

Not to pour fuel on any fires or anything...

I also had a late-production 86 WS6 T/A that I bought from the original 55 y/o lady owner back around 1989. At time of purchase, it was stone stock w/16k miles. It was special in that it had the new-for-87 GTA-style black laced wheels on it FACTORY installed, said so on the widow sticker (another 86 controversy?). That car was freakishly fast also. The only mods I did on it were a Hypertech chip, Flowmaster single-in/dual out muffler, and homemade cold air. It had no trouble putting away my friends equally modded 85 LB9 auto IROC and his brother's 86 Mustang GT. It could also hold its own with most 350 3rd gens and later model 5 liters that I came up against on the street. No 5 liter pilot would ever believe that it was only a stock 305. Unfortunately, I never ran it at the strip so I don't know what ETs it was capable of . I do know that seat-of-the-pants was much better than the stock, 20k mi 1990 Formula 350 that I bought about 5 years later. I remember being disappointed in the Formula for getting pulled by the same type of cars the 86 could hang with. Maybe the 86 was just a freak and the 90 was just a slug. Hard to compare against my current 3rd gen, 1989 was a long time ago already .

Nun, I agree with MadMax. Dyno your car and if the results surprise you pull the cam and check it.

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89 Formula
LB9 5-speed