4.100 Crank in Ls1 Help
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Teching In
Joined: May 2008
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4.100 Crank in Ls1 Help Just been bouncing this idea around in my head, I know that it is not a common build and I dont want a lq4/9 I just want a different build
4.100 crank in Ls1 with 3.903 bore= 392 stroker
Also would it be able to hold a 250 shot?
4.100 crank in Ls1 with 3.903 bore= 392 stroker
Also would it be able to hold a 250 shot?
more cubes isnt everything, a stroke like that is going to take forever to rev up, prob wont rev about 5000rpm, and will be a torque monster lacking in the higher rpms
as stated theres reasons for not doing it, plus it would be a PITA to balance and alot of machine to to the block to fit, if its even possible to fit
just my .02
as stated theres reasons for not doing it, plus it would be a PITA to balance and alot of machine to to the block to fit, if its even possible to fit
just my .02
more cubes isnt everything, a stroke like that is going to take forever to rev up, prob wont rev about 5000rpm, and will be a torque monster lacking in the higher rpms
as stated theres reasons for not doing it, plus it would be a PITA to balance and alot of machine to to the block to fit, if its even possible to fit
just my .02
as stated theres reasons for not doing it, plus it would be a PITA to balance and alot of machine to to the block to fit, if its even possible to fit
just my .02
If you find a machine shop that can't balance a 4.1" crank they do not know what they are doing with a 4.00" or 3.622" crank either. It will fit in the block just fine; you have to space the windage tray away from the main caps and modify the pick up tube mount to maintain pick up to pan clearance. You also have to clearance the oil pan for the #1 and #2 rod bolts.
I'd only do a 4.100" crank with a motor with more bore so it can breathe better. 4.03" at the minimum.
you can go all the way up to a 4.125 stoker crank in a LS1 to make it a 402, with the stock bore, if you do the stroke that you want, make sure that you check the number 7 piston at BDC for a interferance with the reluctor wheel on the crank shaft. Ran into that with a build, and a buddies shop, never seen it before. It turned into a real PITA having to notch the piston and rebalance all the other ones. I say you go for it.
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For these motors a 4.100" crank will make a hell of a motor if it is built correctly. Mine is a Callies Compstar crank, Eagle 6.125" rods, and 4.07" Wiseco pistons. Cartek 5X heads, 239/247 LSL cam, Victor Jr intake and Accufab 4150 throttle body. With just routine oil changes it makes a hell of a street/strip motor.
For these motors a 4.100" crank will make a hell of a motor if it is built correctly. Mine is a Callies Compstar crank, Eagle 6.125" rods, and 4.07" Wiseco pistons. Cartek 5X heads, 239/247 LSL cam, Victor Jr intake and Accufab 4150 throttle body. With just routine oil changes it makes a hell of a street/strip motor.
It's really not worth the risk of oil burning issues, aggravation, irritation, etc for an extra 9-10 cubic inches.
Yes, I have a 6.0L iron block. I guess I didn't pick up on the fact that he was talking about only an LS1 block. I stated above that I thought a 4.100" stroke would be overkill unless you teamed it with a larger bore so the engine can breathe better and use larger cylinder heads.
more cubes isnt everything, a stroke like that is going to take forever to rev up, prob wont rev about 5000rpm, and will be a torque monster lacking in the higher rpms
as stated theres reasons for not doing it, plus it would be a PITA to balance and alot of machine to to the block to fit, if its even possible to fit
just my .02
as stated theres reasons for not doing it, plus it would be a PITA to balance and alot of machine to to the block to fit, if its even possible to fit
just my .02
LMAO
If you dont know what your talking about....which is very clear you dont...please dont go around the internet posting **** like this ever again b/c one day someone that doesnt know any better it going to believe you.
I know this is a crank/stroke debate but if you are starting from scratch why the interest in the smaller bore?
All the cylinder head flow charts I have seen for both bore sizes look quite a bit better on the 4.0" plus a better selection.
4.1 in a LS2 block
if you are sold on the 4.1
All the cylinder head flow charts I have seen for both bore sizes look quite a bit better on the 4.0" plus a better selection.
4.1 in a LS2 block
if you are sold on the 4.1
. There's no reason to be an *** about it, everyone learns by making mistakes.