2 bolt or 4 ?
Thread Starter
Drifting
Joined: Aug 2000
Posts: 1,805
Likes: 36
From: Annapolis MD
2 bolt or 4 ?
Just wondering what opinions/experience is for how much HP a 2 bolt main with studs and forged crank might be able to take? Saw a roundy-round motor shortblock with nice parts but to my somewhat surprise still running 2 bolt 400 blocks.
-Greg
-Greg
Pro
Joined: Aug 2002
Posts: 702
Likes: 1
From: the corner of walk and dont walk
Re: 2 bolt or 4 ? (GregP)
Saw a roundy-round motor shortblock with nice parts but to my somewhat surprise still running 2 bolt 400 blocks.
-Greg
-Greg
Safety Car
Joined: Mar 2002
Posts: 3,780
Likes: 442
From: Southwest MI
Re: 2 bolt or 4 ? (GregP)
in the late 60's / early 70's a friend of mine raced a 68 302 Z-28 (2 bolt, small crank), granted the stroke was only 3", but that engine turned 8000-8500 (maybe even a bit more) for many many runs, never a problem. top end was built up to make enough HP to do the 1/4 in ~11.70. the only problem with drive train durability
Melting Slicks
Joined: Jun 2000
Posts: 3,215
Likes: 6
From: Tampa Florida
Re: 2 bolt or 4 ? (sinistervette)
I wonder if the 4 bolt 400 production was stopped more for the possibility that 4 bolts aren't necessary on that 'new' engine with the long stroke-meaning durability concerns weren't :confused:
How many engines die from main bearing failure from lack of rigidity...few I would say.
And that is why I just sourced a 4 bolt main LT1 block... :D Do as I say not as I do...:)
How many engines die from main bearing failure from lack of rigidity...few I would say.
And that is why I just sourced a 4 bolt main LT1 block... :D Do as I say not as I do...:)
