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67 Camaro SS/RS L78 M20 Convertible
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Discussion Starter · #1 ·
Hi guys,
as the title says:
i cant find the build specs of this engine in this hotrod article.

I suspect them to be written below the pictures, which my country doesnt allow to load.
I dont know what the problem is, i only can see the text on the site, not the pictures.

Much appreciated and thank you in advance!!

Chevrolet Big-Block Engine Buildup - How To - Hot Rod Magazine
 

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Discussion Starter · #3 ·
There are no specs in the pictures. That's pretty much just an ad for the builder.
oh ok i see, thank you very much nontheless. would have been interesting though..
 

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Pump Gas BBC 582, 12 to 1 for 93 octane.Conventional heads by Straub Tech, HS Shaft rockers, custom Straub Solid Roller 55MM, camshaft, Morel Black Mamba Lifters, Port single plain intake, Stef's wet sump oil pan. Dyno'd on 93 at Nowack Racing.

715932
 

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67 Camaro SS/RS L78 M20 Convertible
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Discussion Starter · #6 ·
Pump Gas BBC 582, 12 to 1 for 93 octane.Conventional heads by Straub Tech, HS Shaft rockers, custom Straub Solid Roller 55MM, camshaft, Morel Black Mamba Lifters, Port single plain intake, Stef's wet sump oil pan. Dyno'd on 93 at Nowack Racing.

View attachment 715932
wow Chris, thank you very much, who would have thought!

12:1 and 93? I think thats a new one for me.. I think a giant cam and aluminum head makes it possible?

you remember any more about the heads? CSA size would be interesting..

That thing really breathes well, impressive torque curve
 

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wow Chris, thank you very much, who would have thought!

12:1 and 93? I think thats a new one for me.. I think a giant cam and aluminum head makes it possible?

you remember any more about the heads? CSA size would be interesting..

That thing really breathes well, impressive torque curve
I did the heads, intake and valve train for that engine. Heads started as AFR 335cnc. They got a valve upgrade to 2.375/1.85 and port work to get them to flow near 460cfm. Jayden at @ Straub did an excellent job of digitizing and reproducing the port and a CNC version was created. The heads were built for nitrous and had all new alloy seats and coated Ti valves. The intake was a Sniper that was heavily ported to match the combination. The valve train is a Harland Sharp shaft system and I believe this was their first one for these heads. CSA was a little over 3.4, ports were 351cc. The engine wasn't pushed very hard with 93...only ran that for cruising between tracks. Dyno pull was a mix of 93 and Renegade race gas.
The heads and intake are now on a 565 I built that did make 1035hp with some compression.

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Hi guys,
as the title says:
i cant find the build specs of this engine in this hotrod article.

I suspect them to be written below the pictures, which my country doesnt allow to load.
I dont know what the problem is, i only can see the text on the site, not the pictures.

Much appreciated and thank you in advance!!

Chevrolet Big-Block Engine Buildup - How To - Hot Rod Magazine
Dave Ebbert of DNE built that engine a long time ago and it was a very expensive engine. Lot of trick stuff like big journal cam, keyway lifters, spread port heads, coated pistons, crank trigger, vacuum pump, big oil pan, etc. I'm pretty sure he used every trick in the book he knew back then. It's also a tall deck, long rod engine which helps a lot. 4.60 bore, 4.25 stroke and probably a 6.80" rod.
 

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67 Camaro SS/RS L78 M20 Convertible
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Discussion Starter · #9 ·
I did the heads, intake and valve train for that engine. Heads started as AFR 335cnc. They got a valve upgrade to 2.375/1.85 and port work to get them to flow near 460cfm. Jayden at @ Straub did an excellent job of digitizing and reproducing the port and a CNC version was created. The heads were built for nitrous and had all new alloy seats and coated Ti valves. The intake was a Sniper that was heavily ported to match the combination. The valve train is a Harland Sharp shaft system and I believe this was their first one for these heads. CSA was a little over 3.4, ports were 351cc. The engine wasn't pushed very hard with 93...only ran that for cruising between tracks. Dyno pull was a mix of 93 and Renegade race gas.
The heads and intake are now on a 565 I built that did make 1035hp with some compression.

View attachment 716059 View attachment 716060 View attachment 716061 View attachment 716062 View attachment 716063 View attachment 716064
my god, what a feedback. Thank you very much.

Yes it appears it was a high effort build. So the dyno run wasnt actually real pump gas, but mixed with race gas?

Still around 1000hp would be one nice build for almost 20 years ago..
 

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my god, what a feedback. Thank you very much.

Yes it appears it was a high effort build. So the dyno run wasnt actually real pump gas, but mixed with race gas?

Still around 1000hp would be one nice build for almost 20 years ago..
The engine and dyno session I was referring to was the one Straub posted. It had nothing to do with the Hot Rod Magazine article you asked about. The one Straub posted about was dyno'd on a mix.
Dave Ebbert's engine was dyno'd on Westech's dyno in So Cal and yes, was CA 91oct pump gas and legitimate. It was an impressive build for the time.
 
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