The Official Centrifugal Pulley/Boost Combo Thread!!!

DSG2003Mach1

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Ahh I gotcha. Yea shit once you cross the 850ish mark shit gets expensive af

ya on 15# it made 650 pump/715 E85, 18lbs Id guess closer to 700 pump and mid-high 700s on E85. Im just a street driven idiot that doesn't need all that to start with, damn sure don't need to push for more. I feel like this combo is right up to the top of what I'd push for on a factory computer and stuff, it would start going too far away from street car to make passes at the track and not get the boot.
 

Badaz01

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ya on 15# it made 650 pump/715 E85, 18lbs Id guess closer to 700 pump and mid-high 700s on E85. Im just a street driven idiot that doesn't need all that to start with, damn sure don't need to push for more. I feel like this combo is right up to the top of what I'd push for on a factory computer and stuff, it would start going too far away from street car to make passes at the track and not get the boot.
Are your numbers on a 2003 mach1 if so what is your set up.
 

98 Saleen Cobra

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ya on 15# it made 650 pump/715 E85, 18lbs Id guess closer to 700 pump and mid-high 700s on E85. Im just a street driven idiot that doesn't need all that to start with, damn sure don't need to push for more. I feel like this combo is right up to the top of what I'd push for on a factory computer and stuff, it would start going too far away from street car to make passes at the track and not get the boot.
Yea if you’re not racing 7-800 Is perfect for a street car
 

JetmechF16

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Just left HRD with a fresh, much improved tune. We're pretty sure my small JBA primaries are holding back the power along with blower inlet restriction due to placement. Car really loves this tune/power level though, idles damn near like stock and has a nasty pull all the way to redline.

1. 4V C-heads
2. Procharger F-1A-94
3. 5.3 Boss block stroker - 9.8:1 cr
4. Stock '04 Cobra unported C-heads w/BT springs
5. Stock '04 Cobra cams
6. Sullivan lower - HPP custom forward facing upper
7. Treadstone TRST9 A/A
8. JBA 1 5/8 midlengths, JBA 3" h-pipe w/resonators, JBA 3" catback, 4" tips
9. Blower pulley = 3.6" Griptec, Crank pulley = 7.65", Gates K080491RPM belt
10. 25 psi @ 6800 rpm
12. 771/630 (STD cf)

HRD dyno tune graph - 11Apr22.jpg
 

98 Saleen Cobra

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Forgot to update this lol..

1. 2V or 4V : 4V C-Heads (04 Cobra)
2. Type of Blower: Vortech YSI-B Trim
3. Big Bore/Stroker/ Compression: 3.555 bore, stock stroke, 10:1
4. Ported Heads? Foxlake stg 3 (std size valves)
5. What Cams? Custom
6. What intake? (aftermarket, Ported, Ported Short Runner, etc): Sullivan Lower with a Berry Motorsports Upper
7. Intercooled(A/A) or Aftercooled or NO Cooler? Custom 2000hp A/A with 3.5" piping
8. Exhaust Combo?: Kooks 1-3/4" Primary, full 3" off road exhaust dumped.
9. Pulley Combo (blower pulley size, crank pulley size) and belt length if you have it or remember: Custom 10rib 20% (8"), 2.70" griptech 10rib. K100840 (no a/c, p/s etc)
10. Amount of Boost you are seeing at X RPM. 29psi@7300-8500rpm High stall converter
11. Powerpipe?: Vortech Bellmouth
12. HP/TQ: don't have HP numbers.. But the car was getting valve float and a new motor is being built. If I had to guess we were in the 1200rwhp range pretty easily based off fuel data

New motor is going to be nasty. Custom spring package, o ring heads and rcver groove on block. 10:1, copper gasket, double key'd crank (bent the stock single key), Bigger 1-7/8" headers. EGT setup from Holley as well. I'll likely step it down to a 2.50" upper as well if the belt will hold.
 

Badaz01

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Little update to my combo. I just had a set of kooks long tubes put in and I gained another 25 hp to the tire putting the old girl at 596whp.
 

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