84 V6 - 2 different CRs? (8.4:1 or 8.9:1)

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CarGuru > Open discussion > 84 V6 - 2 different CRs? (8.4:1 or 8.9:1) 25 April 2005 08:45:49

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84 V6 - 2 different CRs? (8.4:1 or 8.9:1)
LoadHawg 25 April 2005 02:33:20
	My '84 Firebird came w/ the LC1 engine (Code '1' in 8th spot of VIN) that is an 8.4:1 CR. Apparently there was another V6 in '84 w/ slightly higher CR (8.9:1) - Can anyone tell me more about this slightly higher CR V6? thanks,
		Add comment


Andy Warren 25 April 2005 03:04:27 [ permanent link ]
	In 1985 the 8.5 C/R LC1 2.8L @ 107 hp was changed to 8.9 C/R LB8 2.8L @ 135 hp. This lasted until 1990 and the introduction of the 8.5 C/R LH0 3.1L @ 140 hp which was used until the 4th gen came out. I don't know which parts will swap between the 3. "LoadHawg" <not@chance.com> wrote in message news:0p5o615t2a8tmh9918ul1lavdv27oqa70s@4ax.com...> My '84 Firebird came w/ the LC1 engine (Code '1' in 8th spot of VIN) that > is an 8.4:1 CR.> Apparently there was another V6 in '84 w/ slightly higher CR (8.9:1) - Can > anyone tell me more about this slightly> higher CR V6?> thanks,
		Add comment


LoadHawg 25 April 2005 03:40:52 [ permanent link ]
	So in '84 they offered BOTH a 102hp 8.5 C/R AND a 107hp 8.9 C/R 2.8L V6? Mine was the LC1 (8.5 C/R w/ 102hp) What was the RPO code on the 107hp higher C/R V6? thanks, On Sun, 24 Apr 2005 18:04:27 -0500, "Andy Warren" <andywarren@otelco.net> wrote: In 1985 the 8.5 C/R LC1 2.8L @ 107 hp was changed to 8.9 C/R LB8 2.8L @ 135 >hp. This lasted until 1990 and the introduction of the 8.5 C/R LH0 3.1L @ >140 hp which was used until the 4th gen came out. I don't know which parts >will swap between the 3.
		Add comment


Andy Warren 25 April 2005 04:24:10 [ permanent link ]
	No. Depends on whos specs you look at if the 8.5 LC1 was 102 or 107 HP. There may be an error in your spec sheet for the LB8. It is listed at 8.9 &135 hp for each year it was used. Supposedly the LB8 wasn't installed until the start of the 85 model year. But you know GM, ever heard of a 1968&1/2 firebird? (or is it a 1969&1/2) "LoadHawg" <not@chance.com> wrote in message news:mhbo61d713uopoc3mu94gv0t6iasssi7f1@4ax.com...> So in '84 they offered BOTH a 102hp 8.5 C/R AND a 107hp 8.9 C/R 2.8L V6?> Mine was the LC1 (8.5 C/R w/ 102hp)> What was the RPO code on the 107hp higher C/R V6?> thanks,> On Sun, 24 Apr 2005 18:04:27 -0500, "Andy Warren" <andywarren@otelco.net> > wrote:> In 1985 the 8.5 C/R LC1 2.8L @ 107 hp was changed to 8.9 C/R LB8 2.8L @ >>135>>hp. This lasted until 1990 and the introduction of the 8.5 C/R LH0 3.1L @>>140 hp which was used until the 4th gen came out. I don't know which parts>>will swap between the 3.>
		Add comment


LoadHawg 25 April 2005 08:45:49 [ permanent link ]
	Yep I know how GM can be. ... ;) All I'm going by is the '84 Pontiac Firebird's Owner's Manual: It lists 2 V6s. One they call the '1' engine and the other they call the 'L' engine. The 1 or L come from teh 8th spot in the VIN. The '1' engine is listed as 8.5 CR and 'L' as 8.9 CR. To be honest I'm not familiar with the LB8 engine and was wondering if both CRs could possibly be for the LC1 ... ? Or maybe the LB8 made an appearance in '84? Dunno - just speculating... thanks, On Sun, 24 Apr 2005 19:24:10 -0500, "Andy Warren" <andywarren@otelco.net> wrote: No. Depends on whos specs you look at if the 8.5 LC1 was 102 or 107 HP. >There may be an error in your spec sheet for the LB8. It is listed at 8.9 >&135 hp for each year it was used. Supposedly the LB8 wasn't installed until >the start of the 85 model year. But you know GM, ever heard of a 1968&1/2 >firebird? (or is it a 1969&1/2)
		Add comment

CarGuru > Open discussion > 84 V6 - 2 different CRs? (8.4:1 or 8.9:1) 25 April 2005 08:45:49

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84 V6 - 2 different CRs? (8.4:1 or 8.9:1)

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