Stroke vs Head(s) turbo application
01-20-2007, 10:47 AM
#21
Originally Posted by pwrtrip75
. . .I dont think you really need a stroker for torque in a boost app either.
In my particular application, more stroke really helped. My old motor was 363 cid with a T76. My best time was 10.40 at 143 mph on a 1.9x 60' time at 18-20 psi boost. I had a terrible 60' because of turbo lag since I can't build boost on the line, even with a 2-step.
I re-arranged my goals a bit because I wanted to get in the 9's without a trans-brake. I stroked it to 388 cid, advanced the cam 4 deg, and stepped up from a 2.73 to a 3.00 gear, all in hopes of getting a better 60' time off boost. I lowered the boost to 16-18 psi for reliability reasons. I also tightened the converter and installed skinnies up front in hopes of getting my mph up a tad (or offset the losses from the advanced cam, lower boost, and supposedly cid increase). Well. . . my plan worked. First pass off the trailer was a 9.92 at 146 mph.
01-20-2007, 02:36 PM
#23
Originally Posted by Pro Stock John
My combo is laggy but it will build boost on the 2step Mike.
Mike
01-20-2007, 03:22 PM
#24
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Originally Posted by pwrtrip75
If you have a stocker and a stroker pumping the same air through them, (smaller cubes would need a little more boost to acheive the same airflow as larger cubes) I would assume the stocker would be better. A de-stroker I think would be better than a stroker in boost applications, less rotating mass and I dont think you really need a stroker for torque in a boost app either. Max bore would be best and minimum stroke.
Just my opinion.
Just my opinion.
