What are you thought on this concept for an all bore 401?

LSX cast iron GMPP block
4,20 custom pistons, copy of stock but obviously larger diameter.
Reuse ALL stock parts such as crank, rods, plus all the bits and pieces.
(If you are looking beyond DD use, replace the rods)

Top it off with a stock set of L92 heads with L92/L76 intake.
The L92 heads should flow well on that big bore I guess.

This would, depending on cam choice, make a very strong DD.
For a tow motor also keep the stock heads for that BB oval port kind of low down Tq.

What´s your opinion on the benefit of an all bore motor,
as well as the cost of doing one compared with a stroker 402/408?

BR//

 

Rick @ synergy motorsport which is building my 438 is not a fan of stroke at all, I am going 4.175 Bore and a 4.00 stroke.
Mark

 

Rick is not a fan of stroking a Forced Induction engine set-up, but a longer stroke will give some low end torque at the cost of higher rpm's. ASAIK

 

I stand corrected

 

I agree with him, I wouldn't go over a 4" stroke in a Gen III/IV sb either.

Just curious though, what in your mind is a stock stroke in a LSX block??? I didn't know they came with a stroke # let alone a crank...

 

this was also put on 'tech...

all bore 401 would be good for high Hp apps... not high Tq... get a stroker if you want stroker power.

 

Yep, there's something to be said about the torque of "square" motors -- a 4" (or 4.0x") bore x 4" stroke would be a stout tow rig.