what am i doing wrong?
Joined: Jun 2004
Posts: 1,501
Likes: 7
From: Ft. Irwin, California (But Virginia is home)
Ricky, something's causing the car to "hiccup" at 4900RPM. Most likely a Ve tuning value needs a slight adjustment in the 4800-5200 RPM boost cells. Also, how much timing you currently running? HP is about right, but you should be seeing the torque earlier...and more than 405. I'm running 20* timing WOT. Timing increase will help the torque.
Also noticed the HP is getting pretty wavy in the upper RPM range....even with a smoothing factor of 5 on the graph. Leads me to believe that there is a "surge" in the incoming airflow. Belt slip, probably. Also check to make sre there's no "air-blockers" from the intake to the throttle body, such as overlapped pipe connections against the "flow" of the incoming air.
Here's my graph as a comparison at 5PSI:
Don't worry Ricky....you'll get the car running faster
Also noticed the HP is getting pretty wavy in the upper RPM range....even with a smoothing factor of 5 on the graph. Leads me to believe that there is a "surge" in the incoming airflow. Belt slip, probably. Also check to make sre there's no "air-blockers" from the intake to the throttle body, such as overlapped pipe connections against the "flow" of the incoming air.
Here's my graph as a comparison at 5PSI:
Don't worry Ricky....you'll get the car running faster
I feel that a set of 4.10 gears would totally transform your car, Ricky. For dragstrip use I'd also ditch the front sway bar and, as has been suggested, get a set of 90/10 shocks up front. Hal/QA1 double adjustable shocks were very well for this, as they can easily be redialed for normal street use.
KP is right, (as always) see if you can find someone who has the MM overdrive crank pulley, ASP also sells new ones. The stock ProCharger LS1 6 rib crank pulley is on the small side, making it hard to get much boost out of a P-1SC without excessive belt slippage, as it causes you to have to run a small pulley on the head unit. Bob
KP is right, (as always) see if you can find someone who has the MM overdrive crank pulley, ASP also sells new ones. The stock ProCharger LS1 6 rib crank pulley is on the small side, making it hard to get much boost out of a P-1SC without excessive belt slippage, as it causes you to have to run a small pulley on the head unit. Bob
I also have the EPP FI cam, patriot gold dual springs, and lightly ported 317 heads. I was getting some valve float @ 6500.
My tuner said that i might have to shim the springs, or try the patriot extreme springs.
I was kind of surprised by that, that was actually the last thing that i thought i might have had an issue with. Again, in my case that was @ 6500, and i'm on a d1, but still something that i wouldn't over-rule completely.
FWIW
--Mike
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From: MOREHEAD KY
I feel that a set of 4.10 gears would totally transform your car, Ricky. For dragstrip use I'd also ditch the front sway bar and, as has been suggested, get a set of 90/10 shocks up front. Hal/QA1 double adjustable shocks were very well for this, as they can easily be redialed for normal street use.
KP is right, (as always) see if you can find someone who has the MM overdrive crank pulley, ASP also sells new ones. The stock ProCharger LS1 6 rib crank pulley is on the small side, making it hard to get much boost out of a P-1SC without excessive belt slippage, as it causes you to have to run a small pulley on the head unit. Bob
KP is right, (as always) see if you can find someone who has the MM overdrive crank pulley, ASP also sells new ones. The stock ProCharger LS1 6 rib crank pulley is on the small side, making it hard to get much boost out of a P-1SC without excessive belt slippage, as it causes you to have to run a small pulley on the head unit. Bob
im right there with you man im learning as i go
Ricky,
I also have the EPP FI cam, patriot gold dual springs, and lightly ported 317 heads. I was getting some valve float @ 6500.
My tuner said that i might have to shim the springs, or try the patriot extreme springs.
I was kind of surprised by that, that was actually the last thing that i thought i might have had an issue with. Again, in my case that was @ 6500, and i'm on a d1, but still something that i wouldn't over-rule completely.
FWIW
--Mike
I also have the EPP FI cam, patriot gold dual springs, and lightly ported 317 heads. I was getting some valve float @ 6500.
My tuner said that i might have to shim the springs, or try the patriot extreme springs.
I was kind of surprised by that, that was actually the last thing that i thought i might have had an issue with. Again, in my case that was @ 6500, and i'm on a d1, but still something that i wouldn't over-rule completely.
FWIW
--Mike
Thread Starter
10 Second Club
iTrader: (13)
Joined: Feb 2006
Posts: 3,297
Likes: 0
From: MOREHEAD KY
Ricky, something's causing the car to "hiccup" at 4900RPM. Most likely a Ve tuning value needs a slight adjustment in the 4800-5200 RPM boost cells. Also, how much timing you currently running? HP is about right, but you should be seeing the torque earlier...and more than 405. I'm running 20* timing WOT. Timing increase will help the torque.
Also noticed the HP is getting pretty wavy in the upper RPM range....even with a smoothing factor of 5 on the graph. Leads me to believe that there is a "surge" in the incoming airflow. Belt slip, probably. Also check to make sre there's no "air-blockers" from the intake to the throttle body, such as overlapped pipe connections against the "flow" of the incoming air.
Here's my graph as a comparison at 5PSI:
Don't worry Ricky....you'll get the car running faster
Also noticed the HP is getting pretty wavy in the upper RPM range....even with a smoothing factor of 5 on the graph. Leads me to believe that there is a "surge" in the incoming airflow. Belt slip, probably. Also check to make sre there's no "air-blockers" from the intake to the throttle body, such as overlapped pipe connections against the "flow" of the incoming air.
Here's my graph as a comparison at 5PSI:
Don't worry Ricky....you'll get the car running faster
Im runing 4:10's in my car. It is a love hate relationship, I love the quick acceleration but some times the short gears get on your nerves. I usually go first straight to fourth.
Troy
Troy
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why did you put 3.08 gears??? you want like a 3.73 or even a 4.10.. with centri superchargers, you get boost with rpm... they are belt driven, so as to why you would have put longer gears confuses me.. running 6 lbs on that set up should make run what you ran.. get a smaller pulley and get some gears...