blue_thunder91

Guys, I have my 91 z28 with a 307 and im in the processing of installing new heads. I wanted to put some old corvette camel hump heads but im not to sure if they will work on my 307??? I believe they should but i just wanted to get some feedback and double check b4 i purchase the heads!!!!

1MeanZ

iTrader: (9)

are you sure you have a 307? who put it in and why the heck did they use a 307? if the car has the original engine it is a 305 and no the camel hump heads wont work. they will bolt on and the engine will run, but your compression will go way down because the camel humps have larger combustion chambers than the 305 heads. camel hump heads are obsolete anyway. there are many aftermarket castings and even GM castings that blow them away.

blue_thunder91

Yea its a 307, many people dont believe it but there were quite a few of the third gens that came out with the 307 instead of the 305, and yes i do have my original engine in the car. Its too bad that the camel hump heads wont work cause they really are the best heads for any small block chevy. What would i have to do to slap those heads on there??

1MeanZ

iTrader: (9)

you are totally wrong. who ever told you a third generation camaro or firebird ever came with a 307? this is the dumbest thing i have heard on here in a while.

PS: and no camel humps are not even close to the best head for a small block. you are stuck in the 60s

blue_thunder91

Im looking for the webpage to show u that the 307 exists and do some research, with the right combination on those camel hump heads you can get in the low 12's. And a low 12 makes a very respectable street car.

blue_thunder91

Cant find the page cause the domain no longer exists but just like the LS1 isnt really a "350" its actually a 346 rounded off to call it a 350, the 91 and 92 camaro with a manual trans had a 307, and the TBI models had the real 305. Of course GM makes it to where there was only 305 and 350 but in reality that isnt their real displacement.

91 z28 350

If that was true it would be on this website

blue_thunder91

get your engine blueprinted and you will find its real displacement

81ZDan

Are you saying you have a traditional "307" which is a short stroke 3.25" vs the standard 305/350 stroke 3.48"?

blue_thunder91

i dont know the stroke on it but i know for sure its a 307, and let me tell you i love the damn thing, i was thinking of swapping it for a ls1 at one point but im smoking ls1's at the tracks.

kevinc

There's a lot you don't know.

You evidently don't race at any track I've been to.

91 z28 350

Thats funny

91 z28 350

So whats done to the car that your smoking ls1's ?

blue_thunder91

i obsviously dont go race where ur at but come on down to texas and ill make u a believer.

91 Z28 camaro

Fully ported and gasket matched intake
Hedman shorty headers
Custom 3" magnaflow exhaust cutoff at rear axle
Centerforce dual friction clutch and pressure plate
Centerforce flywheel
Just had my t-5 rebuilt(3rd and 4th gears cracked in a burnout contest)
eliminated the pollution pump
smaller crank pulley
running synthetic all the way through(engine, trans, rear-end)
Pro 5.0 shifter

Soon to come.........4-11 gears and kyb shocks and struts

This combination( of course with me driving cause my brother cant run the times i do in this car) beats lt1's and ls1's by about a half car length. Next time i go to the tracks ill try to get a video clip of a run, which probably wont be for about a month after i install my gears.

91 z28 350

So what you running in the 1/4

blue_thunder91

average run on a good cool day is a low 13. By low 13 i mean about 13.2-13.3. My brother best run is a 13.6, and i dont understand how he cant get where i do in the car. I guess speed shifting makes that much of a difference. I wish i had a scanner to post my time slips, but i dont.

blue_thunder91

I really dont know how far off topic we got but what will i have to do to make a set of camel hump heads work????

brutalform

What are your 60' times?

blue_thunder91

i dont have my slips with me here at work but ill post them from my house later tonight.

brutalform

After researching, no where can I find an article or anything that says, third gens came with a 307! 5.0, and 5.7, unless you are running a six banger.

brutalform

You dont know what the 60's are? Not off the top of your head even?

midnight383

sure its not just a 305 with a small overbore from a generic rebuild job? (.010)

Coult_91

that is by far the stupidest thing i heard in awhile but, hey if you want the crappy 307 in your car you can have it and with those mods you had ... i doubt very highly even with a 305 you were running anywhere in the 13s maybe high 14s.. if your lucky.. and drop the 307 thing....its' just not true .......

blue_thunder91

hey time slips dont lie, its not my fault you cant set up your 305 to run deep in the 13's. So what you saying is that its rare for a 305 to get in the deep 13's, yet a 302 can get you into the damn high 12's and its a 5.0 as well. YOu do the math!!! Any engine can get you in the 13's as long as you know what you got and have the right mods with a good driver. There's a stock 92 or 91 firebird somewhere in this forum that is running in the mid 13's, STOCK, timeslips are even posted.

Jim85IROC

iTrader: (2)

This is the dumbest thread I've read in months! A stock 307!

GM hasn't built a 307 since 1973.

kevinc

Pay for my plane ticket and I'm there, always looking for an excuse to return to Texas. I can watch 305s creep down the strip here, no way I'd pay to come back to TX to watch it happen there.

Or post a video of your car running the 1320' and be sure the time and speed is captured...no editing allowed.

thirdgen88

GM has produced a lot of 307's past 1973... They're just not SBC...

http://jadcock.oldsgmail.com/cutlass/307spec.html

Tell us some casting numbers on your "307"...

Jim85IROC

iTrader: (2)

I shouldn't have said "GM", but since none of the olds motors ever found their way into a thirdgen, they don't count anyway.

rgarcia63

Searches with a reference to a 307 Camaro Z28, but not all.

- Paul Edwards 70 Camaro Z28

From a Camaro spotters point of view.
- Camaro Spotters Guide & Yearly Changes

More to the point, GM hasn't put one in any Camaro since 1973.

Question:
blue_thunder91 is this a four barrel carb?, and will you post your VIN numbers so we can decode it, because no matter what has been done to the car the VIN will tell what stock was put in it.
Better yet, post a picture of the engine bay.

Coult_91

I didnt say it was immpossible to get a 305 to run in the 13's i seen guys on the sight that have claimed 12's... but with the mods you listed i dont think so and their are some difference between the 305 and the 302....and the ford 302 is truely a 4.9, and my 305 is almost completely stock and i dont have money to make my 305 faster right now...Also right now i dont care as long as it gets me from home to school

midnight383

blue thunder, if you "got your engine blueprinted" and know anything more about engines, you'd also know that there is a MUCH more significant difference between a 305 and a ford 302 than just 3cid...characteristics of these differences dynamically changing power output, potential, rev qualities, etc

ford 302 > chevy 305 every day of the week
chevy 302 > ford 302 in the same respect

your car did not come from the factory with a 307

and sure, camel hump heads will be fine, just shave the hell out of 'em, might have clearance problems, but you seem to have your mind set anyway

btw, what is your method for determining displacement from blueprint specs?

kevinc

Let's go with this...the guy evidently got an old-tech Oldsmobile 307 flat-tappet smog engine instead of the later design 305 w/ roller cam...and he's proud of it.

brutalform

The times you mention are a great accomplishment, for a 350. You talk as if its no big deal. You CAN provide the board with 60' times? No? I think I speak for a lot of racers, saying they ALL remember their best 60'! BTW, yes, its VERY rare to do that.!!

91 z28 350

rgarcia63

Neither do casting, and VIN numbers, post your's & pictures so we can put this to sleep.

Chrome

Are you sure your car doesn't look like this:

Apeiron

It could be a 307 if it was bored +.010". Of course it wouldn't be stock then.

I'm surprised nobody's commented on the "camel hump heads really are the best heads for any small block chevy" remark yet.

Jim85IROC

iTrader: (2)

We're having too much with the 307 comments right now. We'll get to that later.

1MeanZ

iTrader: (9)

I remarked on the heads, in my second post way at the top. I should have never wasted my time replying to this guy, what a joke.

Daz

iTrader: (1)

Question:
Are camel hump heads made in the middle east?

NYC LSC

KiLLJ0Y

iTrader: (1)

i cant beleive he compaired a chevy DZ302 to a 307.. i dont think he realizes the bore size of tha 302 and a 307..



can we ban him for stupidity?

blue_thunder91

i wasnt talking about a chevy 302 i was talking about a ford302

blue_thunder91

on another note i dont race every weekend, i race about once every two months thats why i really dont pay attention to my 60 times, all i really care about is passing the line first at the quickest time possible

arrowcamaro

iTrader: (2)

what.....the.....fukk

Coult_91

why do his post keep getting dumber just put the camel hump heads on your car and shut up!

KiLLJ0Y

iTrader: (1)

a ford 302 still has a 4.00 inch bore size, same as the chevy 302.. basically a 350 block with a 283 crank..(other people dont flame me, i think thats what it is)

Parrydise7

iTrader: (1)

4 inch bore and a 3 inch stroke = 302.

Have you found that scanner yet?

brutalform

Then he will find that he cant bolt any accessories up to his heads, if they do lack the mounting holes. Some did, some did not.

Jim85IROC

iTrader: (2)

Accessories are for sissies! When I installed my camel hump heads on my car, I had to make a bracket to stabilize the back of the alternator, but as long as you don't have a/c, you can get away without the holes.

But unfortunately, you can't get away from the fact that the camel humps are a **** poor match to TPI and a mild cam.