procharger ho with gibson catback track time

[S550 KID]

I went on Saturday at Tulsa raceway. About 70 degrees, full weight premium gt pp with 3/4 full tank and about 50 lbs of crap in the trunk. I'm guessing 3900+lbs I weigh 190lbs...managed a few 12.9s @121. 7 to 8 psi.
91 octane pump

Mods, p1sc1, dss driveshaft, pro kit springs, procharger bullet bypass valve.

The car spun through the first three gears with full traction control on. Using 315 35 20 invos on velgens vmb5. Trap speed is ok, I was expecting more around 125 though. Maybe with a shifter and more passes will get better.

A few questions though for the experienced supercharger guys. This is my first supercharger so it's a tad different from turbos from which I'm very seasoned with.

Anyways, on the back of my stock procharger HO pulley I see belt dust. Is that normal? I have the slack in the belt where I can turn the belt 90 degrees with two fingers. Should I tighten it more?

Also besides tires or drag wheels the goal was 650/700 rwhp. would it be easier to reach that goal with more fuel better tune smaller pulley, etc, or jumping up to the d1sc .....?:cheers:

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[Todd15Fastback]

Your race weight I bet was 4000lbs or a bit more.

What tune is on the car? Canned tune or custom?

 

[Chargedguard5.0]

What was your 60ft.?

 

[cp5899]

Been waiting for numbers. You have dss driveshaft or shafts?

 

[Chargedguard5.0]

I went on Saturday at Tulsa raceway. About 70 degrees, full weight premium gt pp with 3/4 full tank and about 50 lbs of crap in the trunk. I'm guessing 3900+lbs I weigh 190lbs...managed a few 12.9s @121. 7 to 8 psi.
91 octane pump

Mods, p1sc1, dss driveshaft, pro kit springs, procharger bullet bypass valve.

The car spun through the first three gears with full traction control on. Using 315 35 20 invos on velgens vmb5. Trap speed is ok, I was expecting more around 125 though. Maybe with a shifter and more passes will get better.

A few questions though for the experienced supercharger guys. This is my first supercharger so it's a tad different from turbos from which I'm very seasoned with.

Anyways, on the back of my stock procharger HO pulley I see belt dust. Is that normal? I have the slack in the belt where I can turn the belt 90 degrees with two fingers. Should I tighten it more?

Also besides tires or drag wheels the goal was 650/700 rwhp. would it be easier to reach that goal with more fuel better tune smaller pulley, etc, or jumping up to the d1sc .....?:cheers:

Tires and half shafts should be your next mod. You should be able to get over 650 out of the p1. I'm doing a tune, half shafts, and tires before I take it to the track.

 

[drabon74]

12.9 or 11.9?

 

[Chargedguard5.0]

With that trap speed it should be low 11s with some tires. I'm sure you would have trapped Higher as well with out all the wheel spin.

 

[FATHERFORD]

you need tires...

 

[S550 KID]

Yeah tires, axles, bap, smaller pulley and new higher octane tune. :cheers:

 

[B Gordon]

Always seems to be something.
Modifications lead to more modifications which lead to broken parts which leads to more modifications.
Been there, done that.
According to a different thread, if you actually get some tires and a good tune you will probably be needing a new clutch shortly.

 

[Chargedguard5.0]

^^^^^^thats the damn truth. I was thinking about that today. If you don't track the car you really don't need much. Once u start taking it to the track get ready to open up the wallet.

 

[AdrianMAK]

Nice times, some seat time will get that ET down. What were your 60ft times?
With traction you should go low 11s easily if not faster. If you do good drag radials look into a clutch. I learned the hard way.

I just went 11.97@118 with a bad clutch and a decent 60ft with the same exact setup.

 

[S550 KID]

My 60 fts are 2.1, I'm still 3.73 gears with tall 315 35 20 rears going thru the traps at like 67xx rpms in 4th. So it works out for me there. My 1st thru 3rd is useless I ran 88mph in the 1/8 which means this supercharger is doing all it's work in the back half when actually hook.

I have a McLeod rxt with lightened aluminum flywheel sitting here on my desk waiting to be installed soon as well. That should gain about 2mph and way better shifts up top from my experience with the previous gen 5.0s

 

[Sam@Coastal]

Halfshafts would be the very next thing you should get. I think we have went through at least 6 already. Even in underpowered cars. Where are you going to the track at? Bradenton?

 

[Chargedguard5.0]

Halfshafts would be the very next thing you should get. I think we have went through at least 6 already. Even in underpowered cars. Where are you going to the track at? Bradenton?

Do u think the 800hp half shafts will be fine for these cars around 600rwhp?

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