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4.3 L Lt1 ??????

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Old 11-30-2006, 11:53 PM   #21
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I believe I read one of my magazines a while back,they(GM)took a 93-95 formula with that size LT1 V8 and put a supercharger on it.I'll have to look for it.

Last edited by EVILWS6; 12-01-2006 at 11:11 AM.
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Old 12-01-2006, 12:38 AM   #22
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So, can you take the baby LT1 4.3 V8 (265 ci) and use something like BS3 to allow the motor to spin to 7800 to 8000. Would that be the range you would need if you were trying to build 302 LT1 ? Just curious, it would be cool if someone actually put one of these little monsters together and set it up for some nasty high rpm horsepower....
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Old 12-01-2006, 05:37 AM   #23
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Quote:
Originally Posted by EVILWS6
I believe I read one of my magazines a while back,they took(GM 265 c.i.) in a 93-95 formula with that size LT1 V8 and put a supercharger on it.I'll have to look for it.
It wa a 93 car i believe and GM itself did this
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Old 12-01-2006, 05:41 AM   #24
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The smallest SBC is either a 262 or a 263, I can't remember. A friend in high school's Impala (85? boat still) had a 265 V8. He never changed the oil since it leaked/burned a quart every week LOL

We had a little discussion about the 4.3 LT1. I wanted to take the crank and make a destroker motor from it for higher revs out of a stock setup. With out having to drop a bunch of money on a different setup.
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Old 12-01-2006, 08:38 AM   #25
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http://www.akmcables.com/l99.htm

That's pictures of one going in to my 94Z. Put down 203 rwhp untuned. I mighta been able to get 210 out of 'er. That's with SLP single cat headers, ported intake, 58mm tb, etc.

It's out now, a 383 went in over the summer. I'll sell the L99 cheap if anyone wants to come get it.
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Old 12-01-2006, 10:00 AM   #26
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Wow! This turned into a pretty good thread!

I might have to pick up this engine for the hell of it!!
GREAT INFO GUYS! THANKS!


Ross
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Old 12-01-2006, 11:08 AM   #27
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Quote:
Originally Posted by zlover129
It wa a 93 car i believe and GM itself did this
Thats correct,an early '93.I found the magazine,it's High Performance Pontiac Sep.2006.It's definitely a L99 with an Eaton 112c.i. roots style supercharger.It made 339 hp @5750/364 lb/tq @3250.It had a 6 sp and did 0-60 in 5.2 and the 1/4 in 13.47@106mph.
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Old 12-01-2006, 02:26 PM   #28
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Quote:
Originally Posted by Formula350
The smallest SBC is either a 262 or a 263, I can't remember. A friend in high school's Impala (85? boat still) had a 265 V8. He never changed the oil since it leaked/burned a quart every week LOL

We had a little discussion about the 4.3 LT1. I wanted to take the crank and make a destroker motor from it for higher revs out of a stock setup. With out having to drop a bunch of money on a different setup.

that would be a 4.3L V6.. I dont recall there being a 4.3L v6 until the L99 came out...
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Old 12-01-2006, 03:52 PM   #29
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My ECM/PCM documentation (~1981 onward) only shows 2 computer controlled 4.3L V8's - the 82 Oldsmobile LV8 and the little L99.
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Old 12-01-2006, 04:20 PM   #30
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Well I don't know what year it was, I know it was an 80s, and I know it was a V8, a 265. Because he prided himself on having the second smallest GM V8 in his boat lol
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Old 12-01-2006, 06:12 PM   #31
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You chirren listen up to us old fogies, now, hear?

The SBC was introduced in 1955 (how old were YOU then? I was 10). It had 265 cubic inches. Then in '57 or so they upped the size to 283. Then 327, then 350. Various and sundry other sizes appeared over the years including 302 (the '67 - '69 Z28), 305, 307, 262, and probably a few others I'm forgetting - it's not alzheimers, just crs.

And let's try not to refer to the mid-90's reverse flow fuel injected 4.3L V8 as a "4.3L LT1", shall we? It's an L99, dammit.

Easy, Gary, where's your nitro pills?

Cheers -- Gary
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Old 12-01-2006, 07:11 PM   #32
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1979-1981 there was a 4.4L... which is a 267ci small block chevy v8
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Old 12-01-2006, 08:13 PM   #33
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When I first built my Camaro I worked with the NHRA and GM to get the L99 into the Stock/Super Stock classification guide. I then built one and ran it in IHRA Stock GT. At 3300 lbs (RW) it ran 7.85 in the eighth mile! It made just a little over 300 rwhp and was a blast to drive. It's a shame that the IHRA banned fuel injection from the Stock GT classes, because I never got near the potential out of that motor (I only ever made four passes with it before it was banned).

There was one car running an L99 in Super Stock GT that was running in the 10.80's last year (1/4).

Daren
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Old 12-01-2006, 09:20 PM   #34
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I wish I had not parted mine out. Would love to have run it with the current stall and gears, it would have liked it.

Other than insurance I think it would have been better for GM to use it as the base f-body motor rather than the V6, would have made the engine cheaper by volume as well as the f-bodies cheaper to produce due to all the same k-memebr wiring and all. Insurance companies would have seen it as a V8 though even if it was only V6 like power.
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Old 12-01-2006, 09:25 PM   #35
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400, and didn't GM have a SB 427 for a short while? Not the LS7 mind you.

EDIT: NM I'm thinking the GM "W" Block. 348, 409 and 427.

Last edited by Formula350; 12-01-2006 at 09:38 PM.
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