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  #21  
Old 01-13-2018, 05:24 PM
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1967Z28 1967Z28 is offline
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Thanks for the info. Where all the 400 engines available from the start of '68 production except the RAII?

I think any RAII would smoke an L78 and I am a Chevy guy.

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Originally Posted by Tracker1 View Post
-When you ordered a 400 Firebird, you got the base 400 at 330 horses with the #16 casting heads.

-Then you could order a 400 HO which used the high-flow exhaust manifolds from the next-rung-up 400 Ram Air engine and the hotter cam for the manual trans car. Everything else stayed the same as base 400. Closed air cleaner, closed hood scoops.

-Then the 400 Ram Air Engine had the special exhaust manifolds, and different heads, casting 31, with swirl polished valves and special valve springs, for higher RPM operation. And, of course, the foam air cleaner element that mated to OPEN hood scoops.

-In April 1968, came the first "round port" Pontiac engine. The nasty b#*ch Ram Air II (even though Pontiac never used Ram Air I as a designator for their 400 Ram Air) This was a very special engine with completely re-engineered heads with round exhaust ports, forged aluminum pistons (versus cast of the other 400s), special crank, special 4-bolt block, re-balanced Armasteel crank etc. Foam element air cleaner, open hood scoops. A beast in a Firebird.
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  #22  
Old 01-13-2018, 05:25 PM
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Quote:
Originally Posted by Astock View Post
So, it took until 1968 1/2 for Pontiac to finally build an equivalent to the L78 thats been around since 1965.
Oh snap! I think my 67 400 HO GTO would give a 67 L78 Chevelle a good run in bone stock trim. And I'm not a diehard pontiac guy by any means.

That would be a fun race.
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  #23  
Old 01-13-2018, 05:54 PM
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Quote:
Originally Posted by auwrestling View Post
Also add that the 68 RAI Firebird had four bolt main cap 400 block!
You would know sir - how many dozens of these things have you owned Matt? I'm betting you've lost count.
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  #24  
Old 01-13-2018, 06:04 PM
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Quote:
Originally Posted by 1967Z28 View Post
Thanks for the info. Where all the 400 engines available from the start of '68 production except the RAII?

I think any RAII would smoke an L78 and I am a Chevy guy.
Interesting comment...I have asked about this before and others have said the opposite. On paper the torque specs are better than the L78...but, the L78 can rev a little bit higher. I would think that a Firebird vs. Chevelle matchup would lean toward the bird...but with an L78 Camaro or Nova it might be a different story

Either way I would love to see and drive one of those 68 RA2 cars...especially if it had the 4.33 gears.

-wilma
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Old 01-13-2018, 07:24 PM
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https://www.youtube.com/watch?v=KWR0IBTtG80

1969 Corvette L89/L71 vs 1968 Firebird Ram Air II

427 auto 4.56 vs 400 auto 4.10
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  #26  
Old 01-13-2018, 07:51 PM
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[QUOTE=Lee Stewart;1383940]https://www.youtube.com/watch?v=KWR0IBTtG80

1969 Corvette L89/L71 vs 1968 Firebird Ram Air II

427 auto 4.56 vs 400 auto 4.10[/QUO

Vette' may have been sleeping or couldn't hook em up -- looks like the Firebird took a dive in second ... the BBC drove around him on the big end ...
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