Guess what she will make this time on the dyno

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03-04-2009, 10:28 AM

#21

Sxynerd

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Location: Virginia

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Quote:

Originally Posted by mustangman281

I will guess 530rwhp and lots of belt slip. The car is not set up right (for a vortech)to make high boost and high numbers. The overdrive crank pulley will help but there will not be enough belt wrap on a vortech set up to handle 17-18 lbs. With stock heads and crap cams (for a blower) your power is going to really be killed.

I don't think he was clear enough...

He didn't have belt slip with the 2.9RR pulley and the S trim before, why would he now? especially with the addition of the OD crank pulley and the T trim.

He's at 10lbs "WITH" the 2.9RR pulley is because of his 8:1 compression and his Intercooler combination. He's adding the ODCP and a power pipe so no matter what that should increase his boost at the least another 5lbs.

Am I off base?

03-04-2009, 11:38 AM

#22

mustangman281

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More boost makes the supercharger harder to turn which will cause the belt to slip.

03-04-2009, 01:06 PM

#23

Mustang_NTriangle

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My guess is 545 RWHP and agree that stock heads and no blower cams will hurt his figures.

03-04-2009, 01:38 PM

#24

SVTeeshirt

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probably like 1110whp.

but really 527

03-04-2009, 01:51 PM

#25

lizzyfan

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540rwhp

03-04-2009, 03:08 PM

#26

2000AZ5.0GT

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there seems to be alot of guys here that don't like having upper power, I'm guessing it's because you aren't built for it?

Reason I say this is because I have a 10% UNDERDRIVEN crank pulley, as opposed to you guys running an Overdriven one.

I guess I just prefer more topend than lowend, either way, OP won't make more than 540rwhp with his mods.

03-04-2009, 07:49 PM

#27

mustangman281

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10% underdrive crank spins the blower slower. How does that give you more top end power. Unless your spinning to 8000rpms I don't see how it will help and will still give you less of a powerband.

03-04-2009, 08:25 PM

#28

2000AZ5.0GT

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Quote:

Originally Posted by mustangman281

10% underdrive crank spins the blower slower. How does that give you more top end power. Unless your spinning to 8000rpms I don't see how it will help and will still give you less of a powerband.

I'm spinning to 7100 with the 6spd. Trust me, I still have plenty of power, and keeps belt slip away.

Plus, the T-trim is only rated to 55,000RPM. At 6900RPM on the motor, with a 3.4" pulley, I was seeing something like 54,000RPM at the blower, so going to an underdriven crank pulley, it lets me go to 7,000+RPM, and not have to worry about over-spinning the blower.

oh, and I never said it gives me more, it just lets the engine rev higher without fear of hurting the blower