Firebird 67-68

Chuck Garey · 08-17-2009, 03:54 PM

Sorry Adam I just know it's a ram air car

Jeff Lee · 08-17-2009, 04:57 PM

As I recall the RA 1968 is called a 400 HO. Virtually the same specs as the RAIV. I have a neighbor that still has his 1 owner 1968 GTO HO. Extremely rare!

Adam Strang · 08-17-2009, 07:02 PM

The HO and Ram Air 1 motors had D port heads and the Ram Air II motor had round port heads with the standard size intake port in `68.In` 69 the Ram Air IV motor was introduced with round port exhaust like the Ram Air II but with a taller intake port had the same cam as the Ram Air II but had 1.65 rockers.The 400 HO was called a Ram Air III in `69 and `70. So,no the Ram Air IV and HO motors do not have virtually the same specs.

johnny shot · 08-17-2009, 07:15 PM

I sent you a pm Janne.
Email me cbminc@earthlink.net for details.
John

bill dedman · 08-17-2009, 07:23 PM

Thanks Adam; that clears up a lot.

Jeff Lee · 08-17-2009, 11:40 PM

Quote:

Originally Posted by Adam Strang

The HO and Ram Air 1 motors had D port heads and the Ram Air II motor had round port heads with the standard size intake port in `68.In` 69 the Ram Air IV motor was introduced with round port exhaust like the Ram Air II but with a taller intake port had the same cam as the Ram Air II but had 1.65 rockers.The 400 HO was called a Ram Air III in `69 and `70. So,no the Ram Air IV and HO motors do not have virtually the same specs.

I agree on the round / D port, etc., but I think the confusion on names is Pontiac never really had a Ram Air II. They had the 1968 400 4bbl with D ports and no numerical designation which was followed by a Ram Air with round ports which technically was never marketed as a Ram Air II. Correct? Followed by the Ram Air III of 1969/1970/1971 with D ports and the RAIV with round ports of 1969/1970. I'm no Pontiac expert so let me know if I'm wrong.

I wonder why NHRA has the 1969 Firebird RAIV and RAIII rated the same 356 HP with all the better parts on the RAIV? Seems like the RAIV would be the best of these two.
1968 shows in NHRA as having the Firebird with a 400 that's OEM / NHRA rated at 330 / 325 - 335 / 327 - 335 / 340 RA & 340 / 335 RA. That would take a lot more investigating.
Since I'm not building a FB, good luck Janne!

Adam Strang · 08-18-2009, 05:20 AM

The Ram Air I came out in `67 and was continued until mid `68 and that`s when the Ram Air II was introduced and that ran until the end of `68. The Ram Air II had the first round port exhaust heads and a .480ish lift cam.

`69 the 400 HO was then called the Ram Air III and the Ram Air IV was introduced.The Ram Air III was still a D port motor with the small lift cam while the IV motor had round port exhaust and tall intake runners.The high lift Ram Air II cam was used again in the Ram Air IV motor but had 1.65 rockers which made the lift somewhere around .520.

The HO moniker was used in `70 for the 455 which was a D port motor and then in `71 and `72 the 455HO had the round port heads with the tall intake runners.

08-17-2009, 03:54 PM	#1
Chuck Garey Member Join Date: Mar 2002 Location: Texas Posts: 173 Likes: 0 Liked 10 Times in 7 Posts	Re: Firebird 67-68 Sorry Adam I just know it's a ram air car

08-17-2009, 04:57 PM	#2
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: Firebird 67-68 As I recall the RA 1968 is called a 400 HO. Virtually the same specs as the RAIV. I have a neighbor that still has his 1 owner 1968 GTO HO. Extremely rare! __________________ Jeff Lee 7494 D/S '70 AMX

08-17-2009, 07:02 PM	#3
Adam Strang Member Join Date: Dec 2001 Location: Jericho,Vt Posts: 207 Likes: 94 Liked 96 Times in 23 Posts	Re: Firebird 67-68 The HO and Ram Air 1 motors had D port heads and the Ram Air II motor had round port heads with the standard size intake port in `68.In` 69 the Ram Air IV motor was introduced with round port exhaust like the Ram Air II but with a taller intake port had the same cam as the Ram Air II but had 1.65 rockers.The 400 HO was called a Ram Air III in `69 and `70. So,no the Ram Air IV and HO motors do not have virtually the same specs. __________________ Adam Strang 1018 STK Last edited by Adam Strang; 08-17-2009 at 07:04 PM.

08-17-2009, 07:15 PM	#4
johnny shot Junior Member Join Date: Aug 2005 Posts: 57 Likes: 0 Liked 1 Time in 1 Post	Re: Firebird 67-68 I sent you a pm Janne. Email me cbminc@earthlink.net for details. John

08-17-2009, 07:23 PM	#5
bill dedman VIP Member Join Date: Feb 2002 Location: Conway, AR Posts: 1,739 Likes: 0 Liked 6 Times in 4 Posts	Re: Firebird 67-68 Thanks Adam; that clears up a lot. __________________ Bill

08-18-2009, 05:20 AM	#7
Adam Strang Member Join Date: Dec 2001 Location: Jericho,Vt Posts: 207 Likes: 94 Liked 96 Times in 23 Posts	Re: Firebird 67-68 The Ram Air I came out in `67 and was continued until mid `68 and that`s when the Ram Air II was introduced and that ran until the end of `68. The Ram Air II had the first round port exhaust heads and a .480ish lift cam. `69 the 400 HO was then called the Ram Air III and the Ram Air IV was introduced.The Ram Air III was still a D port motor with the small lift cam while the IV motor had round port exhaust and tall intake runners.The high lift Ram Air II cam was used again in the Ram Air IV motor but had 1.65 rockers which made the lift somewhere around .520. The HO moniker was used in `70 for the 455 which was a D port motor and then in `71 and `72 the 455HO had the round port heads with the tall intake runners. __________________ Adam Strang 1018 STK