stock crank, 3.7"pulley=10% od and what blower pulley? - 2003-04 Mach 1 Registry Owners Club

DSG2003Mach1 · 08-31-2012, 01:29 PM

came across a used innovators west 8rib 10% OD crank pulley with paper work showing it was just inspected by IW..thinking about selling my stock diameter IW crank pulley and running this but not sure what blower pulley that would leave me with. Cory (cmylxgo's) page is no longer up with the blower rpm calculator

NeverEnuff · 09-01-2012, 05:03 PM

7.5 crank/4" upper * 4.1 step up * 6500rpm=50k Impellar speed
7.5 crank/3.7" upper * 4.1 step up * 6500rpm=54K impellar speed
7.5 crank/3.4" upper * 4.1 step up * 6500rpm=58.7K impellar speed

Hope this helps.

DSG2003Mach1 · 09-03-2012, 09:32 PM

its definitely a start, thanks

found this link on an fbody site
http://ls1tech.com/forums/attachment...calculator.zip

stock crank (6.5") and 3.7 is about 1600rpm LESS than a 7.25 crank and 4" upper at 6500

i get more confused all the time...the IW site says the 10% OD is 7.25 but doing a search people like cory (cmylxgo) keep saying its more like 7.45

TKat13 · 09-03-2012, 10:29 PM

If you end up selling your stock crank pulley, PM me, I have a buddy that is looking for one. He is selling his F1 and going Turbo. His Crank pulley is bad but does have other 8 rib pulleys.

DSG2003Mach1 · 09-03-2012, 11:24 PM

well that 10% OD pulley sold and my 8 rib kit just got here so I guess Im gonna run what I have and see what happens.

08-31-2012, 01:29 PM	#1
DSG2003Mach1 700 HP Mach Join Date: Nov 2003 Location: Orlando, FL Posts: 8,384	stock crank, 3.7"pulley=10% od and what blower pulley? came across a used innovators west 8rib 10% OD crank pulley with paper work showing it was just inspected by IW..thinking about selling my stock diameter IW crank pulley and running this but not sure what blower pulley that would leave me with. Cory (cmylxgo's) page is no longer up with the blower rpm calculator __________________ 03 dsg mach1 - MPR built 9.5:1 motor, D1, cams, ported intake, full exhaust, magnum t56, built rear, E85 etc... '12 F150 FX2 Supercrew with Ecoboost daily beater

09-01-2012, 05:03 PM	#2
NeverEnuff Add 49ci...but why? Join Date: Jan 2007 Location: Abilene, TX Posts: 622	Re: stock crank, 3.7"pulley=10% od and what blower pulley? 7.5 crank/4" upper * 4.1 step up * 6500rpm=50k Impellar speed 7.5 crank/3.7" upper * 4.1 step up * 6500rpm=54K impellar speed 7.5 crank/3.4" upper * 4.1 step up * 6500rpm=58.7K impellar speed Hope this helps. __________________ 89 LX-NA 32v, 437rwhp NA 79 Coupe-Who knows 93 Typhoon-Daily 95 F350-Tow rig

09-03-2012, 09:32 PM	#3
DSG2003Mach1 700 HP Mach Join Date: Nov 2003 Location: Orlando, FL Posts: 8,384	Re: stock crank, 3.7"pulley=10% od and what blower pulley? its definitely a start, thanks found this link on an fbody site http://ls1tech.com/forums/attachment...calculator.zip stock crank (6.5") and 3.7 is about 1600rpm LESS than a 7.25 crank and 4" upper at 6500 i get more confused all the time...the IW site says the 10% OD is 7.25 but doing a search people like cory (cmylxgo) keep saying its more like 7.45 __________________ 03 dsg mach1 - MPR built 9.5:1 motor, D1, cams, ported intake, full exhaust, magnum t56, built rear, E85 etc... '12 F150 FX2 Supercrew with Ecoboost daily beater Last edited by DSG2003Mach1; 09-03-2012 at 11:18 PM. Reason: i was referencing the wrong pulley sizes

09-03-2012, 10:29 PM	#4
TKat13 Mach-T Join Date: Jun 2004 Location: DFW Posts: 2,865	Re: stock crank, 3.7"pulley=10% od and what blower pulley? If you end up selling your stock crank pulley, PM me, I have a buddy that is looking for one. He is selling his F1 and going Turbo. His Crank pulley is bad but does have other 8 rib pulleys. __________________ Darrell Black '04 Mach 1 Track Times (bone-stock w/drs):60 ft - 1.90 \| 1/8 - 8.67 (100 shot,E85,4:10s,Street tire):60 ft - 1.67 \| 1/8 - 7.88 New build - 750rwhp; not track tested (yet) Mods: Build Log Paint&Body Tuned by Manny @ HPP

09-03-2012, 11:24 PM	#5
DSG2003Mach1 700 HP Mach Join Date: Nov 2003 Location: Orlando, FL Posts: 8,384	Re: stock crank, 3.7"pulley=10% od and what blower pulley? well that 10% OD pulley sold and my 8 rib kit just got here so I guess Im gonna run what I have and see what happens. __________________ 03 dsg mach1 - MPR built 9.5:1 motor, D1, cams, ported intake, full exhaust, magnum t56, built rear, E85 etc... '12 F150 FX2 Supercrew with Ecoboost daily beater

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