garagedweller2

Is it possible to build a 302 using a large crank journal SBC block?(350 block)? Is there anyone who makes a custom 3'' stroke forged crank? Also, does anyone make a repro of the original crossram intake? what are the specs for the GM151 cam? Thanks a lot!

ylose

uh oh ! someone has been reading up !! :yesnod:

I love these old stories of cars produced so limited in quantity yet they are ***** to the wall.

from the stories I heard...these cars came with hooker headers and flowmasters right from the factory allowing the SBC 302 to breathe something fierce !! :cheers:


the engine !

more info on them ! http://www.67camaros.davidv.net/models/z28/z28.htm
http://www.67camaros.davidv.net/bynumbers/302.html

want internals ?




[Modified by ylose, 2:45 PM 6/6/2002]

Neo Fender

I thought that the '68 and '69 was a large journal block and only the '67 was a small journal block. A 302 has a 4 inch bore just like a 350 (but with a 3 inch stroke vs. the 350s 3.48 inch stroke).

I rode in one once. Unless you're restoring a first generation F-body, I'd look for a more streeetable engine. the 302 was a very peaky engine with very little low end torque. It was designed just to meet the 305 displacement limit for Trans Am racing (327 w/ a 283 crank).

The cross ram intake would be hard and expensive to find but very cool nonetheless.

burners

Yes, several companies make 3" stroke cranks for the large journal small block. In fact, the '69 302 was a large journal engine. I believe Lunati, Cower and Scat make forged cranks with 3" strokes. Basically any crank company can. Nobody makes a repro crossram but Edelbrock and (I think) Offenhouser make their own designs. I'm not sure the specs on the cam.

dladd74roadster

I have a catalog at home (sorry, can't remember the name of it) that lists that cross ram intake. They have it in stock. It is expensive though. It is a Camaro only catalog. I have no idea how I got on the mailing list. I remember this manifold specifically though because the catalog was very in depth and I looked for it because I knew it would be rare. I was dumbfounded when they listed it.

I'll post the catalog name once I get home.

dl

gerry72

Edelbrock quit the STR10 some time ago. You can still buy the Offy crossram, which is actually much closer in appearance to the original GM design.

As far as making a 302 today, I would have to wonder why. You would be moving in the wrong direction.

garagedweller2

hey, my dad likes high rpm sceamers. judging by the way he drives on the street(keeps the engine at redline), he would love a cross ram fed 302 :jester
oh yea, thanks guys


[Modified by garagedweller2, 2:33 AM 6/7/2002]

Chuck Harmon

I ran the STR-10 cross ram on my 350 with angle plug heads, 1st design factory racing cam, and a pair of 600 double pumper Holley's. That was one screamining combination. Would have loved to find a factory cross ram. Came close a couple times, but never close enough. The only engine I thought would be better was the L88 I've since put in.

Chuck

garagedweller2

ok, the GM151 cam is the duntov 30/30 cam, does anyone know the specs to it? i would appreciate it

Vetterodder

The 151 cam is NOT the 30/30 solid lifter cam used in the DZ302 (and in the `64/`65 365 & 375 hp 327 Vette). The 151 is the L79 (350hp 327) hydraulic cam. At 222º @ .050 and .447 lift, it was quite a bit milder than the 30/30 solid cam.

The purpose of the original Z28 was to have a car that was legal in TransAm racing, which had a 5 liter limit on engine size. The end result was very similar to the 365hp 327 but with the same stroke as the 283, an improved intake manifold, and a 780 cfm carb instead of the 365's 580. Except for the shorter stroke, the 302's long block was the same as the 365's. Same cam, same cr, and same heads (by then the heads had been drilled for accessories but were otherwise the same). They didn't build that many more than was needed to qualify as a stock car for racing purposes in `67 but the demand was there so they upped production a bunch the next year. In `69 they sold about as many (perhaps more?) Z28's as they did Corvettes.

67HEAVEN

Flowmasters were around in 1967?

VegasJen

i was wondering about that too. talk about cutting edge, geez :rolleyes:
this string has kind of hit a nerve for me though. so, say you build a 302 SBC. yeah, i know it's not the torqueiest engine out there but what if you put said 302 in a car that was, oh, i don't know ;) about 2400#? and then let's imagine you could rap that bad boy up to about 8200 and get rubber in the first three gears. i think that would be kind of fun to go :smash: a bunch of ricers :lol: got a 350 block in the garage, hmmm....

LT1driver

no flowmasters in those years, cam has 485 lift and around 248 duration at .050 I am pretty sure, solid lifter cam, no bottom end but a screamer up top. Headers did not come on car, if ordered came in trunk to be dealer installed, never saw one on the street that way however. High 14, low 15 in street trim in quarter. :cheers:

ylose

I ran into an old coot who used to race and it was the first I ever heard of these cars....that was like 5-6 yrs ago, so I don't remember the 'brand' names but he said the dealers were selling them with headers and true duals....as we all know...when they leave the plant till when they are sold, many things can be done and people will think that was how they were when they left the plant. :cheers: when he told me 302 SBC I was like...say what :eek:? after looking on the net I see he was right down to the wire...so I bet there was hopped up ones being sold also.....I'll never know..he was there back then...I wasn't . :lol:

67HEAVEN

The company that manufacturers Flowmasters was started in 1983. http://www.flowmastermufflers.com/web10/MP_about.html

The 1967 Z-28 came with the deep-tone muffler #3910566 from the factory.

garagedweller2

No, I can gurantee that it is a solid cam

PROSOUTH

I had a '69 Z-28, best thing that ever happened to it was to lose the crank. I replaced it with a 350 crank and pistons. Major improvment !!!!

First Camaro I ever saw with a 302 was not a '67 Z/28 but a plain RS with yes, Cast Iron Manifolds. It also had no spoilers, no Z emblems on it although it did have a tilt wheel, fold down backseat and gauges.

This Camaro was one of the first 500 produced and was called a " Little Stinker " This was a little term of endearment tagged on it by GM. The Option code for the engine was Z/28 and hence a star was born after that the car was referred to as a " Z " JIM :chevy

Schmucker

My dad has a 302 in his 10 second '64 Corvette. ~550hp, cranks up to 9-10 grand (passed the redline) at the line. Really revvy engine. I've got to rebuild that thing at some point. It will be on the roads again in 20 years or less, I PROMISE!

garagedweller2

IMHO, your missing the point if your going to stroke the 302