Stroke length

[Ajax87]

plan to rebuild a redtop next year so I'm going over the options. I saw a piston and crank kit from tomei that was only for use with increased stroke. I'm 99 percent sure I don't wanna go this route but it got me pondering the benefits of increased stroke with forced induction?

[compactfean]

yep 90 mm stroke crank i believe. if you build it right you can still hit 8000 redline easy. with a big bore and stroke imagine having an extra cylinder.... almost. more displacement quiker spool, more spool, more torque more power. food for thought bigger stroke, more heat more friction.

[Ajax87]

Wouldn't increased stroke lower rpms causing more turbo lag

[Sugar]

It's still a larger volume of air. I don't know to much about stroker kits, generally people don't recommend them.

[Hijacker]

On a forced induction setup, people rarely suggest them because they're expensive, and the amount of power:dollar ratio isn't high enough. On a naturally aspirated setup, boring and stroking is one of the top ways to increase power production.

And as for the redline, SRs are notorious for having head issues in the top end, so the stroke kit is negligible in the redline. If I stroked a stock motor, I would still expect a redline near 7000 only because the head is the limitation.