67-69 Firebird TECH Includes 69 TA.

          
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Old 09-21-2010, 12:12 AM
chupiw1 chupiw1 is offline
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Default Ram Air II Pistons?

Kind of curious as to what type of pistons tha 1968 Ram Air II came with, cast or forged. A friend asked me about this the other day, and I wasn't entirely sure. Thanks for any information.

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Old 09-21-2010, 10:16 AM
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I believe they were cast.

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Old 09-21-2010, 11:16 AM
chupiw1 chupiw1 is offline
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Thats what I thought, but I wasn't 100% sure. My friend is getting interested in Pontiacs, and I am doing my best to steer him the proper way. He was really curious about the Ram air engines in general. I am pretty familiar with how most of the engines were set up, but I have noticed through the years that when it comes to this engine there is not much out there.

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Old 09-21-2010, 11:20 AM
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I have a GM parts bulletin somewhere in my archives listing all the replacement part #'s.
Not sure where, but will look for it.

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Old 09-21-2010, 06:01 PM
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Forged I believe, same as RA IV

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Old 09-21-2010, 07:34 PM
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The May 16 1968 GM Blueprint Sales promo states Forged Pistons. I have a set with a dealer Promo album. It also states Ram Air parts were shipped in the trunks of the cars.

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Old 09-22-2010, 09:42 AM
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Find that Sales Promo yet?
I'd like to see a copy.


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Old 09-22-2010, 07:41 PM
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Default RAM AIR II PISTONS

The '68 Ram Air II came with FORGED TRW (#L2262) flat-top pistons with 4 valve reliefs. Factory originals had the part number (9794056) stamped on top. This is the same piston used in the RA IV. Ram Air I engines originally came with CAST pistons (#478810) but were superceded in the parts book around 1974 to use the RA II/IV forged piston.

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Old 09-22-2010, 09:42 PM
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I knew the piston number was 9794056, never saw where it was forged.

Should have looked at the RA IV piston number I guess.


Here's the P&A on the RA II.
(possibly related to the sales memo?)

Attached Thumbnails
Click image for larger version

Name:	pa-extra-68-13-ra2.jpg
Views:	78
Size:	65.8 KB
ID:	219314  

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Old 09-22-2010, 09:45 PM
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Anyone know a Mr. F.E. Barnard in the Parts and Accessories Div?



Maybe he could shed some light on some things.


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  #11  
Old 09-23-2010, 12:56 AM
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Find that Sales Promo yet?

These should post for all to see.
Attached Files
File Type: pdf RA info part 1.pdf (263.0 KB, 67 views)
File Type: pdf RA info part 2.pdf (242.0 KB, 64 views)
File Type: pdf RA info part 3.pdf (101.3 KB, 53 views)

  #12  
Old 09-23-2010, 06:26 AM
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Reading the brochures posted above, it lists the RA II option having less HP as the GTO.
Did the RA II have the throttle stop on the Firebird?
Also, great to see that Jim Mino posted, been a fan of his efforts for a long time.

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Old 09-23-2010, 11:22 AM
chupiw1 chupiw1 is offline
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Thanks for all the replies, I appreciate it.

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Old 09-23-2010, 06:55 PM
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Quote:
Originally Posted by boater bill View Post
Reading the brochures posted above, it lists the RA II option having less HP as the GTO.
Did the RA II have the throttle stop on the Firebird?
Also, great to see that Jim Mino posted, been a fan of his efforts for a long time.
HP rating game GM played
Exhaust on F body was also more restrictive.

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