305 manifolds
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Joined: Oct 2001
Posts: 236
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From: OK, USA
Car: '87 IROC-Z
Engine: Modded 305 TPI
Transmission: 700r4
305 manifolds
Ok I keep hearing that the LG4 exhaust manifolds are small and I was wondering if it's just the manifolds that are small or are the exhaust ports coming out of the engine also smaller?
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
It's the opening to the y-pipe that's smaller.
Of course, now you're going to make me get up in the garage attic and compare the LG4 to LB9 just to be sure. The picture in my mind, though, is that the ports are the same size.
Of course, now you're going to make me get up in the garage attic and compare the LG4 to LB9 just to be sure. The picture in my mind, though, is that the ports are the same size.
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Oops, I forgot to check. Perhaps after Test & Tune tonight (earlier if it gets rained out).
Thread Starter
Member
Joined: Oct 2001
Posts: 236
Likes: 0
From: OK, USA
Car: '87 IROC-Z
Engine: Modded 305 TPI
Transmission: 700r4
No need I found some manifolds off what appeared to be a 350 tpi at the junk yard along with this freakinly huge Y-pipe and yes the ports are the same but the exit hole is bigger.
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