hey guys i was wondering if i am able to put an ls1 cam in my 86 305 TPI engine... im pretty sure it can be done but will my car run right after or will i have to burn a prom or something like that for the cpu to let it run right? explain to me how this works please.

also if i am on the look out to buy a cam will an ls1 cam be good im looking for a very radical cam... something that will give me a nice lumpy idle but can i have a nice lumpy idle and still have it be computer friendly?

 

Last I heard the LS1 small block was nothing like the standard, or even LT1 small block designs.

I know an LT1 cam would work, but I don't think anything from a LS1 is compatable with a standard SBC.

 

I thought 86's still ran flat tappet cams/lifters? You will need to have a roller block to run the LT1 camshaft. Do you have the roller valvetrain?

 

my engine is all stock except for a hyper tech chip and a hurst shift kit... its an 86 305 TPI with 61,000 miles on it.

how radical of a cam can i put in this thing to getmore power and a bad *** idle and still be computer friendly?

 

86 still uses the hydraulic cams.
roller cams such as the lt1/ls1 will not work

i'm not even sure if the ls1 cams will work either....i know the lt1's will.....

 

The LS1 cam wont work in a SBC. Ever.

As for you wanting the 'biggest' cam for your 86, I wouldnt do that if I were you. Its going to be just as slow as it is now. Making a fast car isnt just a matter of stuffing a big cam in there, everything else has to work with it. I'd look for a mild cam, something like the Summit TPI cam they've been offering for years.

 

ls1 is a gen 3 engine, the 86 is a first gen, will NOT work whatsoever. as for a cam that will work, contact tpis and check out their cams.

 

You know i completely bypassed the fact that it was an 86. Didn't even register. Forgot that the change over to roller blocks and 1pc rear main seals was in 87.

 

that really wouldn't matter up to about 92 93, end of the gen 1 era. the lt's were slightly different due to ignition, rev. flow cooling, no distributor and a few more things. the cams might work with a gen1 with an expensive custom grind, but i have yet to see it. the ls's are a completely far out setup and nothing is compatible from the first 2 gens. 1 pc rear seal or 2, flat tappet or roller, 1st gens can be altered for all that, not the lt's or ls's.

 

You might want to check under the intake on that block. I know the 86 350's had the spider mounting bosses and raised lifter rails for the roller cam, they just didn't have the holes drilled and tapped to hold the spider in place. The bosses for the front of the cam should be there as well. If the 305 block has this, you can drill and tap the block and run the roller cam. Consider calling the parts department of a Chevy dealer. In my area most of those guys are car nuts too!!!!

 

I too own a '86 IROC.

I spoke with Compcams, and they told me this would be the ideal cam to run on a stock engine (stock heads, minor mods, etc):

PART NUMBER 12-249-4
ENGINE SMALL BLOCK CHEVY 265-400
GRIND # CS XE249H-12
DESCRIPTION COMP. FLAT TAPPET CAM
INT EXH
VALVE ADJUSTMENT HYD HYD0
GROSS VALVE LIFT .434 .444
DURATION AT
.006 TAPPET LIFT 249 260
VALVE TIMING OPEN CLOSE
AT .006 INT 16 52
EXH 66 14

THESE SPECS ARE FOR CAM INSTALLED
AT 108 INT C/L
INT EXH
DUR AT .050 206 212
LOBE LIFT .2890 .2960
LOBE SEPARATION 112.0 INT MASTER ID
ADVANCE 4 EXH MASTER ID
RECOMMENDED CC VALVE SPRINGS 981-16


No computer tuning should be needed. Doesn't look too 'big' but compare it to our stock 'peanut' cam.

I e-mailed this off to Thunderracing (link on banner above) and they confirmed this was as big as I should go on a stock motor, anything bigger would be pointless.

I have not yet purchased this camshaft though. I'm still stock for now.

 

I seriously doubt it. I've had more 86 305's apart than I care to mention (besides customer rebuilds), and I have never seen or heard of this happening. I think it ranks right up there with 86 350 Iroc Z's.

 

Yep. There were no 350 1986 camaros. Period.

 

Advance autoparts down the road from me sells an LT1 flat tappet police cam for like $45.

 

first off, there were 350's in 86 camaros. they were the 1le's which gm has no prod. #'s. and lt1 and lb9 and l98 and ls1 are all different. only lb9 and l98 parts will go together.

 

Didn't know that. I was going off of the information here:

https://www.thirdgen.org/techbb2/sho...hreadid=233781

and here:

https://www.thirdgen.org/techbb2/sho...light=1986+350

 

i can't believe an administrator wrote that. as of 85 irocs were only known to be available with 305's but certain dealerships were able to custom order them with the 350's. as far as i know there are some out there, but very limited. my friend, a camaro enthusiast, not to mention an old fart, has an 85 iroc with the 350 which he very rarely drives. still has under 60k on it. plus and original 70 1/2 z28. the catch was the with the 5 speed. that was rarer than rare. i almost bought 1 till i thought the guy was lying, told him he was lying. after months of searching, especially after my wife wrecked my blue 86 iroc, i found numerous sites explaining what i just wrote. bastard sold the car before i could swallow my pride and buy it. he even claimed ALL ORIGINAL DOCUMENTS proving it. he even read off some of the data on the sheets he had. that car was going for a lot more than any regular 3rd gen would go for. the next thing the administrator will be telling us is there was never a 3rd gen camaro with 4 wheel steering. AND THERE IS ONE!!! my friend has the pages from a magazine article for years and i have read it and saw it. that car sits in a museum, that was a test mule.

 

Oh please.

I tell you what, you are so sure, go get copies of said documents and post them here. In the 8 or so years this board has been around, I lost count of how many people said that... and then they came here to post 'proof' and left disappointed and wrong.

5-speed. ROFL! Give me a break.

 

well since you wanna be such a smart ***. READ. certain dealerships were able to order. now isn't it funny that there were existing irocs with 350's for 86 and some people got their hands on em. so u gonna tell me that for 2 years gm decided to not drop a 350 in a camaro. ur a tard. LMFAO!!!!!! and besides only a few and test mules at that, how in the F(%K am i gonna get those papers. u have nothing to say about the 4 wheel steering, so why would i lie about that. or how about a camaro with t/a wheels and a 6 speed, 3RD GEN., or the big block twin plenum tpi 3RD GEN. GM did a ton of experiments that they didn't keep track of info or even evolve with them. 8 years on the post and that makes u smart. i'm not a rocket scientist, and u obviously aren't either, so stop acting like ur ***'s gift to mankind. such a 3rd gen enthusiast.
OH PLEASE!!!

 

I totally disagree there. I've been a member here since late 2000. Madmax is one of the many senior members of this website who goes out of his way to provide accurate help for people here.

Not to discredit your claim, it's just that nobody here has any solid proof to dispute this. Most of our tech data here is based on GM/Chevy documented fact. We are always welcome to new accurate information, providing it has true references.

 

You read first. I asked for proof. Where is it? All you have done so far is prove that you can run your mouth. Dealers could order? Show me an order sheet showing that. There are 86's 350's in private hands? Show me a single 86 350 Iroc that someone owns, that is factory original, anywhere. You're the one making rediculous claims here, with no proof whatsoever besides your mouth running.

Your post doesnt even make sense. Thirdgens were released in 1982, so... 1987-1982 isnt 2 years. In case you were wondering... the 350 was around way before 1985. And if people could order them by going to a dealer, howcome you are calling them test mules and they are only 86's? Well... I think I've pretty much obliterated whatever it was you had to say. I'll be sitting here waiting for your proof, good thing I wont be holding my breath.

 

I have a factory 1986 w/ the experimental V10 :lala:

 

Chrome: I have a factory 1986 w/ the experimental V10.





yeah right!!! Did they do that for real??? If so then how does it run???

 

It runs like my 1988 GTA with the factory Ramjet 502...I have the build sheet and everything

...And no the car actually has a stock 305...see my sig for proof

 

i must be lucky, my roc came with a b-16 vtech motor.

 

Exactly what I thought, YOU are a moron!!! you can't even do math. third gens 82-92. the 2 years I am talking about are 85 and 86, 2 years. You still can't comment on that fact that gm for 2 years would not have installed a 5.7 liter engine in a camaro when it was doing it for how many years, hmm 35 years of existance and only 2 years no 350? I plan on making a few phone calls and emails in the next few days to get some hard evidence. If I can't get a piece of paper, of well, you win an internet post battle. trust me if you were holding your breath, i'd be glad to wait forever. you can't read so I'm not explaining any further. I just received an email from Calloway, Customer Relations Manager @ Chevrolet and should hear back soon. The office is going to do an investigation. I'll also get a copy of my friends article on the 4 wheel steering setup for real 3rd gen enthusiasts to check out too, if my friend won't let me I'll get the name and issue of the mag and try to order it.

 

What are you talking about?? I would love to see a 3rd gen with 4 wheel steering. I believe you would have to at least eliminate the solid rear axle to manage that one. I dont doubt that it could be done or claim to know everything, but this claim seems a little unreasonable. I believe what the VIN tags tell me. That is what I consider original. Everything else is not true or a one of a kind type of thing that no one will probable ever see or hear of. As for me, I would like everyone to believe that I have a special Testarosa Firebird that was hand built by Enzino Ferarri with a modified spaceship engine that was blessed by the Pope himself!!!! Its true, I promise!!!! Just kidding, I dont want to get anyone upse at me too much

 

I'm a moron huh?

Only 2 years without a 350?
What about 1982?
1983?
1984?

Lessee... thats 3 right there. Plus 85 and 86, thats 5. Who is it that cant do math again? 1987-1982 is what I wrote, thats.. lets see... 1987-1982=5, what a concept! 1982, 1983, 1984, 1985, 1986, thats 5 separate years. Golly gee, I passed the first grade! Wooohooooooo!!!

Oh yea, and you forgot one, you forgot the super, extra-rare Iroc limo! Only one made! 350 Corvette LT1 engine, factory GN turbos, 6-speed, 4 T-tops, and a pool in the trunk! (though you cant see the pool)



Also found one of the Firebird X4, a rare experimental that someone must have gotten their hands on! Made for people that wanted an F-body but lived in the sticks where a lowered car just wouldnt work.

 

Max, I might be interested in trading my Ferarri firebird for your Iroc Limo if I can keep my Ferarri spaceshuttle engine out of the car!!!.

 

HotRod magazine ran a story several years back on a handful of test mules GM was toying with, a 4 wheel steering IROC was indeed one of them. Kinda interesting but I don't know what a one-off test mule has to do with 85 and 86 350 Camaros that "people got their hands on"... Dealers ordering 350 Camaros for sale to the public in 86 is crap.... If one or two of the 50 or so 86 350 Camaro test mules slipped through that is one thing, but nobody was going around ordering them for regular sale...

You seem to be under the impression that 85-86 were the only two years with no 350 if I'm reading you correctly. That is not right, there were no 350s in third generation Camaros from 82-86 at least. The 87 was the first time a 350 was offered in the then 5 year old 3rd generation Camaro from the factory for public sale, end of story. And I'm not sure about the 2nd generation years, they may have snuck a year or two in there with no 350 available as well, beats me...

Don't waste you time, read the response from Scott Settlemire, Corvette/Camaro Brand Manager at Chevy in this thread, which was posted above and you apparently didn't read: https://www.thirdgen.org/techbb2/sho...light=1986+350 None for public sale, ie none being ordered by dealers for sale, especially not in 85. Your old fart buddy with a 85 350 IROC 5spd from the factory for public sale is apparently senile, or you're mistaken.

To sum it up the guy you're calling a "moron" rather loudly is right and all available information/evidence backs him up. Perhaps you should quit while you're only neck deep in sh*t...

z28monster To get back to the actual thread topic, I'd look into the "Summit TPI cam" for a good cam for a 86 305. It is a generic cam sold by several companies, specs out at 204/214 dur @.050, lift of .420/.442. I ran that in my 86 IROC's 305 TPI and would recommend it for a mildly modded car (heck it'd be an improvement in a otherwise bone dead stock 305 too I suppose). It gives a great power boost for the money/effort, yet won't throw the computer into fits or get the smog police on your ***. Summit sells it as a kit with lifters and valve springs for $159, changing the valvesprings at this time would be a great idea. Summit TPI Cam kit Link (I just got the cam/lifters for mine, no problems yet but your mileage may vary...) You can get just the cam/lifters for around $80 I believe.

 

the 305 i pulled out of my 86 ta was flat tappet and one piece rear seal. and yes the motor was original 153k on it.

 

this is for passenger vehicles only....

85 older - 2 piece rms, flat tappet hyd

86 only - one piece rms, flat tappet hyd

87 later - one piece rms, hyd roller

 

WOW!!!! Wish I didn't have to be off the computer for so many days. What a flame-throwin thread......


IIRC, 350's were available in 86 Corvettes, Pickups and full size Vans. I never said they were available in Camaros.

The only 86 Camaro's with a factory 350 that I know of were experimental models that GM destroyed after their testing was completed. They never saw the highway.....

The 350 wasn't offered in an "F" body until 1987. Since many 1986 350 blocks had the aforementioned mods (including a one piece rear main seal). I thought maybe some of the 305's had them as well. Judging from a post up above, evidentally not....

Hope that clarifies my position....

 

great post,,,

I've been on this board since 1995 (so I might predate madmax), madmax is one of the most respect guys on this board and he really knows his stuff. You can count on what he says is dead on right.

When a person starts to call another names here, you have already lost the battle. Anyway, this is nothing to get upset about.

FWIW: I own an '87 IROCZ with a 350 TPI. I am the only owner of this car. I remember back 17 years ago that I was mainly interested in this car because it had a 350 in it,,, the 350 was brought back in the Camaro and Firebird. Also, if you bought an '87 350, you HAD to take the 4 speed automatic and the rear end was the 9 bolt BorgWarner unit from Australia. I traded in my '84 Z28 305HO car for the '87 350 IROCZ.

Right now I am putting together a 395 cu in stroker for my '87 IROCZ... The motor just needs the SuperRam put back on and I am waiting on a Pro-Built 700R4 tranny.

 

z28monster,

looks like your post was highjacked. Getting back to the original post,,, no LS1 components are compatable with earlier engines.

In fact, the firing order is different, so even if the LS1 cam would fit, the lobes for the intake and exhaust valves would have the valve timing totally messed up with the piston positions.

 

im just kinda curious.... i havn't been around here long and all but my dad bought my 88 iroc-z brand new.... set it in the garage just for me until i turn 15.... it got driven everyonce in a while other then that left alone.... it didn't get an oil change till i did it myself at 15... well ive started getting into cars not that i turnd 18 and and can get a good paying job... point of all this is... when i ran my vin number it came back as 305 and a 5 speed... i got a problem with this... i know that a BONE STOCK 305 can't run the 14.3 that my car ran.... i would bet money that its a 350... but a 350 with a t-5 wasn't supposed to be a stock option? how did that 350 get in there???