Stupid Tuning Question
Thread Starter
Staging Lane
Joined: Apr 2003
Posts: 52
Likes: 0
From: texas
Stupid Tuning Question Stupid tuning question.
I have the Powerdyne SC 6 lbs kit (only made 5 psi) which included the FMU and Superchip tuning. I have since changed the pulley to the next size and get 7.5 lbs of boost at 5,000 rpms. My current problem is that the truck feels sluggish just off idle then pings from 5 psi up to the 7.5 psi max. I checked my FMU, seems I have the 12:1 calibration. I am also running a 180 deg tstat and water injection triggered at 5 psi to suppress the detonation.
Is there a way to tune the truck (small tweaks) with out ls1edit or having a shop custom dyno tune? If I have to have the custom dyno tune, is there anyone near Austin, Texas? What would I expect to pay for the tuning?
Thanks!
I have the Powerdyne SC 6 lbs kit (only made 5 psi) which included the FMU and Superchip tuning. I have since changed the pulley to the next size and get 7.5 lbs of boost at 5,000 rpms. My current problem is that the truck feels sluggish just off idle then pings from 5 psi up to the 7.5 psi max. I checked my FMU, seems I have the 12:1 calibration. I am also running a 180 deg tstat and water injection triggered at 5 psi to suppress the detonation.
Is there a way to tune the truck (small tweaks) with out ls1edit or having a shop custom dyno tune? If I have to have the custom dyno tune, is there anyone near Austin, Texas? What would I expect to pay for the tuning?
Thanks!
Thread Starter
Staging Lane
Joined: Apr 2003
Posts: 52
Likes: 0
From: texas
Re: Stupid Tuning Question Another question. I was looking at tbyrne's website and noticed that he sells a MAF translator, Timing Tuner, and the Predator programmer. All of these can adjust timing and fuel mixtures, with the MAF translator being the cheapest ($190) and the predator the highest at $420. Does anyone here have any experience with these products?
Thanks!
Thanks!
TECH Addict
Joined: Nov 2001
Posts: 2,659
Likes: 1
From: Bellevue, Wa
Re: Stupid Tuning Question water only?
or
water/alky?
if it's water only trying doing a 50/50 mix of water and alky
also have it kick on before 5psi
thats something you can try for bascially free.
otherwise something like ls1-edit or the predator is what you should be looking at
or
water/alky?
if it's water only trying doing a 50/50 mix of water and alky
also have it kick on before 5psi
thats something you can try for bascially free.
otherwise something like ls1-edit or the predator is what you should be looking at
Thread Starter
Staging Lane
Joined: Apr 2003
Posts: 52
Likes: 0
From: texas
Re: Stupid Tuning Question Ok, maybe a little more info would help you guys. With the basic kit install (5 psi) I had zero pinging except for an occasional ping near redline (5,200 rpms). Later I installed the smaller pulley and gained about 2 psi (now at 7 psi). I did no tuning, just added a water injection system (didn’t want an intercooler). Now the truck has better SEAT OF THE PANTS throttle response and power. I now have a light pinging under moderate load (my wife can not hear it) and heavy pinging above 5 psi (water injection OFF). With the water injection ON (trigger set at 5 psi), I have still have the light pinging under moderate load, and LIGHT pinging above 5 psi. Now here is the big question. Is the pinging because the fuel mixture is now too lean (more air flowing through)? If so, would a MAF translator be a quick and easy fix?
P.S. My track times are a little worse with the extra boost. My best time with the basic kit (5 psi) was 15.38 sec, and my best with the new pulley (7 psi) is 15.42 sec. Temperature was about the same both times.
Thanks again!
P.S. My track times are a little worse with the extra boost. My best time with the basic kit (5 psi) was 15.38 sec, and my best with the new pulley (7 psi) is 15.42 sec. Temperature was about the same both times.
Thanks again!
