402ci d1sc only makes 5 psi.. Help
#1
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i have the 3.40 blower pulley and 7.25 crank pulley with the SDCE 8 rib kit . im told my pulley combo is spinning the blower to 57000, max is 62000. Why am i only making 5 psi? pulley combo should make 10 - 10.5 psi from the formula i found on here last night
few more details on setup.
402 ci tsp block , 317 heads with SS valves no porting or polishing
90 mm fast intake, 90 mm Nick Williams TB
d1sc procharger with the FMIC and Procharger Race valve. i am running the stock maf with combo'd sd tune
few more details on setup.
402 ci tsp block , 317 heads with SS valves no porting or polishing
90 mm fast intake, 90 mm Nick Williams TB
d1sc procharger with the FMIC and Procharger Race valve. i am running the stock maf with combo'd sd tune
Last edited by Punisher_ws7; 06-18-2011 at 12:36 PM.
#6
12 Second Club
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Same pulley combo I'm running (Stock motor though). When I first got mine on the dyno it only made 8#s and I felt like the belt was tight already. Well I cranked down some more on it and was able to get 9#s. Still showing some slip though and cranked on it some more to get 10.5 #s and the belt was silly tight.
I ended up getting a SDCE setup and although it never went back on the dyno, my boost gauge showed 15ish and the belt isn't like a guitar string.
Try to tighten it some more if you haven't. Also check for leaks.
I ended up getting a SDCE setup and although it never went back on the dyno, my boost gauge showed 15ish and the belt isn't like a guitar string.
Try to tighten it some more if you haven't. Also check for leaks.
#7
LS1Tech Sponsor
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I'm going to make a guess that it is your FAST 90mm intake, as they are well known for leaking under boost. Bob
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ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website
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