Nascar sbc heads of the 70s and 80s?

[Adger Smith]

I have a set of heads off Harry Gant's Skoal Bandit car. Leo Jackson engine builder /car owner.
I think these are a 12 or 14 degree head. They take a lot of chevy parts. 17 head bolts in chevy pattern, 18 degree Jesel set up.
Spark plug looks like it is in a bad place. I will try to remember to get a picture. They have an Olds part number cast into the head.

[Walter R. Malik]

And then you had the Buick 10 degree heads possibly the best of the era !,

https://www.teambuick.com/reference/lib ... d_head.php

Dave B

Huh - weird thought, I wonder if those found their way into some of the Trans Am cars of that vintage. Would explain why people were running Buick Trans Am cars.

When Trans-Am allowed both V8's and V6's in the late 80's there were a few Buicks ... mainly because the smaller V6 engines could use a Dominator carb.

[6.50camaro]

I still have and use a set of 292 's done by Reed Cams back in the day. 195 cc intake port , 2.20 csa @the PR pinch , 2.32 avg. csa as calculated from port c/l , flowz 276 cfm@ .700 intake 225@.700 cfm exhaust . Nice head on my 376 cu. in. Hyd roller 7.0 1/8 mile index motor . Probably going back in car for next year . More opportunity to race 7.0 than 6.50 in my area at this time. Dan

[pdq67]

Isn't there an Olds head that has a valve angle down around 7 degrees or so? And is double quench.

If so, how does it work?

pdq67

[mekilljoydammit]

And then you had the Buick 10 degree heads possibly the best of the era !,

https://www.teambuick.com/reference/lib ... d_head.php

Dave B

Huh - weird thought, I wonder if those found their way into some of the Trans Am cars of that vintage. Would explain why people were running Buick Trans Am cars.

When Trans-Am allowed both V8's and V6's in the late 80's there were a few Buicks ... mainly because the smaller V6 engines could use a Dominator carb.

That's actually still in the SCCA rulebook, at least for the club class. I know there were some of the 90 degree Chevy V6s run too. I was just wondering if the various V8 head options of the day led to nameplate engineering - it's all pretty irrelevant now with the state of the aftermarket, of course.

[Ron E]

I have a set of heads off Harry Gant's Skoal Bandit car. Leo Jackson engine builder /car owner.
I think these are a 12 or 14 degree head. They take a lot of chevy parts. 17 head bolts in chevy pattern, 18 degree Jesel set up.
Spark plug looks like it is in a bad place. I will try to remember to get a picture. They have an Olds part number cast into the head.

Sounds like the Dart Olds head. I think it was advertised as a 14° head.

[woody b]

What year did Nascar go to "corporate" engines?

[swampbuggy]

What are you thinking when you say corporate engine, what is the meaning of the word corporate in your question (sentence) Mark H.

[hoffman900]

What are you thinking when you say corporate engine, what is the meaning of the word corporate in your question (sentence) Mark H.

It’s a trick question. 1948

[grandsport51]

1951 Hudson Motor Co.

Dave B.

251E289E-9FA2-4E46-8EEF-8F0662C65BA4.jpeg

[woody b]

What are you thinking when you say corporate engine, what is the meaning of the word corporate in your question (sentence) Mark H.

At some point didn't Nascar start allowing all GM engines/heads, in all GM cars? IE a Chevy could run Old's or Pontiac heads and so on. Maybe I'm confused, and it was only NHRA Pro Stock that went "corporate". (Allowing the Old's DRCE in Chevy's, Pontiacs and Buicks.) Ironically now in Pro Stock they can run any (approved) engine in any brand (approved) car.

[68post]

Isn't there an Olds head that has a valve angle down around 7 degrees or so? And is double quench.

If so, how does it work?

pdq67

Batten heads, real Olds heads (and in cast iron or AL). They have some interior intake ports slightly relocated and take a special Edelbrock Victor intake manifold. I've seen them flow as much as good bbc heads - or more, but it takes a ton of work and custom shaft rockers too. All the fast olds use them drag racing, and the smallblocks are faster than than the BBO's ! I don't think they're 7*, stock is 6* !

I have an interesting SBO DX diesel block virgin casting from back then. It has the small chevy size lifter diameter instead of the standard DX .921", and was cast with the stock 307 bore (aprx .500" thick cyl walls, or more), it is very heavy. They made special diesel block castings for racers and changed the lifters and main sizes. AJ Foyt and Warren Johnson had several Olds blocks that have been sold over the last 20 yrs, some would go out to the 403's bore size.