Dyno Report 9.8:1 vs. 8.7:1 Whipple Tune
04-16-2010, 07:06 PM
#13
6th Gear Member
Thread Starter
Join Date: May 2006
Location: Nicely done
Posts: 11,881
this dyno shop does not have the boost hook up, so
sadly no. what i do know however from "street dyno
sessions", is that the 3.375 pulley is producing right
around 10psi during WOT runs.
i did some "street dyno's" with the 3.125" pulley, but
there's just not enough road to get up past 11psi, so
i don't yet know, what the max is with that one.
sadly no. what i do know however from "street dyno
sessions", is that the 3.375 pulley is producing right
around 10psi during WOT runs.
i did some "street dyno's" with the 3.125" pulley, but
there's just not enough road to get up past 11psi, so
i don't yet know, what the max is with that one.
04-17-2010, 10:21 AM
#14
2nd Gear Member
Join Date: May 2007
Location: Louisiana
Posts: 246
Good info Hammeron. The value of this post is the performance difference between 9.8:1 and 8.7:1. I was scared to get an Aluminator block but not anymore. The difference is minimal. I'd just spin the Whipple up to 16 psi with a separate 10 rib pulley system and call it a day!
04-17-2010, 12:00 PM
#15
6th Gear Member
Thread Starter
Join Date: May 2006
Location: Nicely done
Posts: 11,881
exactly right GerRod. on Monday I'll post up the actual dyno graphs for
the before and after short block swap, so folks can see more of
the real story. even though the peak numbers are similar, they are
moved up slightly, in the rpm band.
04-18-2010, 04:14 PM
#20
5th Gear Member
Join Date: Dec 2006
Location: Redding, CA
Posts: 4,552
i agree onederful!
another thing i learned today is that my whipple tune really is
centered at 10psi (which it should be of course). i put the 12psi
pulley on for an optional run and the results were not very good.
it ran leaner than i expected and it didn't do well in the power
department.
i think with the 12psi pulley and a custom tune (like Simon1 wants), this baby will make some respectable power.
another thing i learned today is that my whipple tune really is
centered at 10psi (which it should be of course). i put the 12psi
pulley on for an optional run and the results were not very good.
it ran leaner than i expected and it didn't do well in the power
department.
i think with the 12psi pulley and a custom tune (like Simon1 wants), this baby will make some respectable power.
Sound different
make more power
get better economy fuel mileage.
You would gain close to 100 rwhp, probably 90 rwhp with a custom tune @ 12 psi.
I'm going to do a thread about my dynoing yesterday.