Go big or go home... Big bore/Stroker talk

[GretchenGotGrowl]

Originally Posted by RacnJsn95

12.2 sounds good. I wouldn't touch a thing to try and drop it back down.



I can see offset grinding the crank to 1.850" (Honda journal size) to gain about .175" of stroke... Of course custom rods will be needed... I think it would be find for an NA application, NASCAR, and circle track guys run that small journal all day long at 8k+ rpms... Going with this stroke, and a 98mm max bore would yield a 4.1. Going with 97mm bore would yield a 4.0.

I guess would really needs to be looked at, is will the head gasket take a piston that big, or would custom gaskets be needed also?

Just by offset grinding the crank to a Honda journal size, it would bump the engine up to a 3.8L (just barely, it would actually be about 3751.9 ccs , or 3.75L).

I have to agree, these ideas are really for a NA setup. You can do a lot with FI without changing displacement at all.

Grinding the stock crank would be cheaper than getting a custom crank, but you lose the roll-hardened journals. I don't think most people will worry about that.

[Jason@JacFab]

Seems I was a little off on my math for the crank offset grinding numbers... You can get a 3.8L just by going to a small journal SBC size rod journal (2")... That may still be suitable for boost? Going all the way down to the 1.85" Honda journal size would yield a 3.9L... With stock bore...

So given this new info, if a guy was to do the Darton sleeves and a max bore of 98mm, it would yield a 4.1L (w/ 2" journals), and a 4.3L (w/ 1.85" rod journals).

Either way, it's not going to be cheap. Just received a quote to have some rods made to fit the 1.85" rod journal... $1329

[c_cook94]

Interesting, I would love a stroker but lack of market is going to make it outrageous. It's definitely something I'd love to see though

I think we would see some pretty good gains with raising the compression

[OfficiallyTook]

Hmm...very interesting...

Taking mass notes...

Let's keep it going

[OfficiallyTook]

I'm just going to bring this over to this thread,



Well, 400 rwhp m6, then go twin turbo set up, and a laundry list of parts

I have the LLT so not really thinking lfx stroker kit but still will enjoy the read, thanks for the link

I was thinking bore/stroke of 3.720/3.770

Bring it to 4.025L or so...

How do you think that would work?

For na, and to boost it.

[_Onyx_Wolf_]

Mannnnnnnn this looks good I would consider getting it ������������