Procharger Boost???
Thread Starter
Intermediate
Joined: Mar 2005
Posts: 47
Likes: 0
From: Houston TX
Procharger Boost???
My procharged 02 Z made 8lbs of boost using a 4.38 Pulley from an older D1-SC w/ an A&A stage 2 setup. The motor is bone stock. Does this sound low?
The D1 is an older unit off a mustang reclocked to run on a C5.
Thanks
The D1 is an older unit off a mustang reclocked to run on a C5.
Thanks
Melting Slicks
Joined: May 2002
Posts: 3,210
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Racer
Joined: Aug 2004
Posts: 353
Likes: 16
From: Twister Country
Considering the following:
A P1SC-1 on the stock ATI kit with the Twin intercoolers.
Makes 8psi with a Huge 4.63" Pulley.
A D1-SC should make considerable more boost.
You either have some belt slip somewhere, or you have an intercooler restriction. Sure you don't have a "restrictor" plate in the blower like Andy, and ECS like to use?
How much HP is it making? Cause that will determine how much air she is moving as well.
Team Owner
Joined: Jul 2003
Posts: 20,474
Likes: 2
From: Detroit
Considering the CR of the LS6 motor and the fact that you run long tube headers you may not have a problem at all.
At what RPM do you make 8 #'s of boost? Also what is the ambient temperature? 8 #'s in the heat is not 8 #'s in the cool air.
At what RPM do you make 8 #'s of boost? Also what is the ambient temperature? 8 #'s in the heat is not 8 #'s in the cool air.
Thread Starter
Intermediate
Joined: Mar 2005
Posts: 47
Likes: 0
From: Houston TX
There was no belt slip. There are no boost leaks.
On the dyno at about 5000 the car would level out at 510 HP and the boost would stay at 8psi no matter the rpm form 5000-6500. It made 510HP at 5000 and did not increase after that. We made several pulls no matter the tune, same thing. It pulled hard and look great till about 5000 after that nothing.
We went to the lower pulley (4.38) it still made the same boost with the smaller pulley as it did with the larger.
It was installed and tuned by a very reputable tuner. Like they said the only X Factor was that old D1.
On the dyno at about 5000 the car would level out at 510 HP and the boost would stay at 8psi no matter the rpm form 5000-6500. It made 510HP at 5000 and did not increase after that. We made several pulls no matter the tune, same thing. It pulled hard and look great till about 5000 after that nothing.
We went to the lower pulley (4.38) it still made the same boost with the smaller pulley as it did with the larger.
It was installed and tuned by a very reputable tuner. Like they said the only X Factor was that old D1.
Last edited by tckylem; Mar 22, 2007 at 01:13 AM.
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Drifting
Joined: Apr 2002
Posts: 1,941
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From: Stealth So Cal GOCC ...comming to invade your neighborhood soon
There was no belt slip. There are no boost leaks.
On the dyno at about 5000 the car would level out at 510 HP and the boost would stay at 8psi no matter the rpm form 5000-6500. It made 510HP at 5000 and did not increase after that. We made several pulls no matter the tune, same thing. It pulled hard and look great till about 5000 after that nothing.
We went to the lower pulley (4.38) it still made the same boost with the smaller pulley as it did with the larger.
It was installed and tuned by a very reputable tuner. Like they said the only X Factor was that old D1.
On the dyno at about 5000 the car would level out at 510 HP and the boost would stay at 8psi no matter the rpm form 5000-6500. It made 510HP at 5000 and did not increase after that. We made several pulls no matter the tune, same thing. It pulled hard and look great till about 5000 after that nothing.
We went to the lower pulley (4.38) it still made the same boost with the smaller pulley as it did with the larger.
It was installed and tuned by a very reputable tuner. Like they said the only X Factor was that old D1.
Instructor
Joined: Apr 2003
Posts: 236
Likes: 0
From: Houston Texas
I have the a and a setup with the D1 head unit. With 6.0l heads, TPIS long tubes and 2 1/2" xpipe g5x2. I see 11# @ 6700 for 665rwhp 550rwtq. That is with the 4.38" pulley, I would have your head unit checked.
Racer
Joined: Aug 2004
Posts: 353
Likes: 16
From: Twister Country
IF your boost levels off..... only one thing causes that....SLIP.
IF your boost doesn't increase with a smaller pulley......SLIP.
The blower is just gears turning an impeller.
If it's turning, it's turning.... no need to send it in.
Look for the following.
1) Belt Dust
2) Hole in Tubing
3) Loose clamps
4) A bypass valve that is not sealing all the way.
Best of luck, but you should be making much much more.
EA
PS: And to the guy that talked about the twins vs. single. You have the right idea, but you are 100% backwards. If the ProCharger Twins were in fact MORE restrictive, then his A&A intercooler. He would then in fact see MORE boost at the manifold with the A&A then the ATI Twins.
IF your boost doesn't increase with a smaller pulley......SLIP.
The blower is just gears turning an impeller.
If it's turning, it's turning.... no need to send it in.
Look for the following.
1) Belt Dust
2) Hole in Tubing
3) Loose clamps
4) A bypass valve that is not sealing all the way.
Best of luck, but you should be making much much more.
EA
PS: And to the guy that talked about the twins vs. single. You have the right idea, but you are 100% backwards. If the ProCharger Twins were in fact MORE restrictive, then his A&A intercooler. He would then in fact see MORE boost at the manifold with the A&A then the ATI Twins.
My stock pullied P1SC with A&A latest P1SC bracket kit runs 11psi...
Thread Starter
Intermediate
Joined: Mar 2005
Posts: 47
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From: Houston TX
Thanks for the responce. I am in the process of replaceing the head unit.
I never had the car run stock, on the dyno. It did however run a 11.9 @ 117 in the 1/4. I am an "ok" driver.
I think the problem lies in the head unit. The head unit in ? was purchased used trying to save a few $$. I have sence bought a NEW unit thinking that will solve the problem. We will see.
I am thinking the unit will not flow over 520HP.
Thanks for all the input
I never had the car run stock, on the dyno. It did however run a 11.9 @ 117 in the 1/4. I am an "ok" driver.
I think the problem lies in the head unit. The head unit in ? was purchased used trying to save a few $$. I have sence bought a NEW unit thinking that will solve the problem. We will see.
I am thinking the unit will not flow over 520HP.
Thanks for all the input
Racer
Joined: Aug 2004
Posts: 353
Likes: 16
From: Twister Country
A blower is not a "wear item" it doesn't wear out. It doesn't slow down, or anything like that. Pretty much either works.... or doesn't (fails)...... no inbetween.
The only things that can limit the blowers flow is well...... a restriction. Either a clogged or dirty air filter, a restrictor plate, an intercooler that is clogged, hole in a tube, hole in intercooler, ect.
I wish you the best with the new head unit. But I hate to say it will not be the fix of your issue. Maybe when you install the new unit, you will find the cause of the issues at the same time.
Headunits can always be rebuilt by a manufacture, but that is just bearings and seals, and if it's "touched down" they can always replace gear sets, and impellers if needed. Maybe you could have had procharger do an inspection of the blower, since they only charge $75 to check it out, and it takes less then a week. Chances are it's a weak or worn out tensioner.
I hope you get it figured out, cause you will love it once you get the boost up, and the power up!!!
EA
Last edited by E.A.; Mar 23, 2007 at 11:06 AM.
Thread Starter
Intermediate
Joined: Mar 2005
Posts: 47
Likes: 0
From: Houston TX
The new head unit was installed and with the very same pulley (4.38) it made 604 RWHP on the first pull. A far cry from 515.
It was late so it will be fine tuned tomarrow. I will report the final numbers.
-Thanks
It was late so it will be fine tuned tomarrow. I will report the final numbers.
-Thanks
Racer
Joined: Aug 2004
Posts: 353
Likes: 16
From: Twister Country
What was the difference in the units?
Do you have both units side by side?
EA
Thread Starter
Intermediate
Joined: Mar 2005
Posts: 47
Likes: 0
From: Houston TX
My final numbers were 604.
That is with an A&A kit, LG long tubes, 4.38 Pulley.
I honestly have not look at both side by side. I am sending the old unit back to ATI for a full rebuild and clean bill of health.
thanks for the support
That is with an A&A kit, LG long tubes, 4.38 Pulley.
I honestly have not look at both side by side. I am sending the old unit back to ATI for a full rebuild and clean bill of health.
thanks for the support
