Boost/Power increase from pulley change? D1sc 346 ci
#1
Boost/Power increase from pulley change? D1sc 346 ci
Heres the current setup:
346/D1sc
54375 impeller speed at shift point (about 87% of max)
creeps up to 15 psi at shift point (just barely hits 15)
If I change to a pulley combo to max out the D1 at 62000 impeller speed, how much boost should I expect to gain?
I have no idea what kind of rwhp it makes right now, but it traps 126 mph in a 4550 lb. truck. I'm guessing somewhere between 600 and 650 rwhp. Do y'all think it would be possible to hit 130 mph or more with this pulley change?
Other details in sig.
346/D1sc
54375 impeller speed at shift point (about 87% of max)
creeps up to 15 psi at shift point (just barely hits 15)
If I change to a pulley combo to max out the D1 at 62000 impeller speed, how much boost should I expect to gain?
I have no idea what kind of rwhp it makes right now, but it traps 126 mph in a 4550 lb. truck. I'm guessing somewhere between 600 and 650 rwhp. Do y'all think it would be possible to hit 130 mph or more with this pulley change?
Other details in sig.
#2
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i dont know but im doing the same thing this year right now im running a 7.25 crank and a 3.7 headunit but im going with a 3.4 headunit this year that SHOULD be max rpm and im hoping to see some were around 17-18 psi but but i would rather see 700RWHP i dont care about boost numbers LOL
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#11
Use this equation to help you out.
(Crank Pulley Dia. x Max RPM x Blower Step Up Ratio)/Blower Pulley Dia.= Impeller RPM
For example a typical maxed out F-body setup would be
Crank Pulley: 7.65"
Blower Pulley: 3.4"
D1sc Step Up: 4.1
Max RPM: 6800
7.65 x 6800 = 52020
52020 x 4.1 = 213282
213282 / 3.4 = 62730 rpm impeller speed