Well, the reports from a few of my customers who have gone from stock stroke BB’s to strokers is...... they love them.
I refreshed a 383 for a guy who was unhappy with his fast rate hyd cammed combo running into the wall at 5500( valvetrain control issues).
I swapped it over to a SFT.
This was a nicely built motor, with custom quench dome pistons, fully ported big valve 346’s flowing about 280.
RPM intake, and I installed a new HP750 on the motor for the dyno session......1-7/8” headers, pump gas.
Motor made what I felt was really good power, and it revved very well, and peaked at a pretty high rpm.
Over 470hp from 5600 to over 7k.
Went in a pristine 70 Challenger, 3.55’s, auto, 10” converter.
Borrowed some 3.91’s and drag radials, went 114mph, I don’t recall if it dipped into the 11’s or not...... but I’m thinking it did.... barely.
It did everything you’d expect it would.
But...... unless you had it up into the power band pretty far...... it didn’t “feel” that hot.
He ran it for two seasons, then decided to put a 4.25” rotating assy in it, so its now a 489”.
He said it totally transformed the cars personality.
Power everywhere...... not just at high rpm.
Absolutely loves it.
It probably has over 125ft/lbs more that it did as a 383.
I don’t understand the Diesel analogy of the stroker.
The rotating assy for the typical 4” stroke SBM has a much lighter bobweight than a stock 340 does.
The motors are very responsive and snappy.
I don’t find them to be tractor-like at all.
I wonder how many Hellcat owners wish they had less tq.
