ProCharger problem?
i gust install my procharger 12 psi with 383ci and i have problem with it first i didnt make any tunning to it. but when i draive the car there is problem from 2000 rpm to 4000 the car is nocking it dasent whant to go fast but when it gos over 4000 rpm to 6000 the car is fine can some one tell me what can be or how can i ***** the problem. and what is the best spar pulgs for using 12PSI.
thanks for help.
i wish that you can understand what i mean because my english is not good but iam traying my best.
As for plugs I run NGK TR6's gapped at .032
They are very good in my book.
As for the knocking issue, i'd say it sounds like you are going lean in that RPM range which is killing power and causing the knocking issues, but it can be a lot of other things too.
Have you had it tuned at a shop or are you doing it yourself? I'd get the tune looked at a little closer before taking the car WOT again...just to be on the safe side.
J
no i didnt tuned my car yet but i will do that later i am waiting for my ls1edit to come to me so i can tuned the car.ok how i can no that the car is going lean or rich by the dyno or the autotap.
i gust install my procharger 12 psi with 383ci and i have problem with it first i didnt make any tunning to it. but when i draive the car there is problem from 2000 rpm to 4000 the car is nocking it dasent whant to go fast but when it gos over 4000 rpm to 6000 the car is fine can some one tell me what can be or how can i ***** the problem. and what is the best spar pulgs for using 12PSI.
thanks for help.
i wish that you can understand what i mean because my english is not good but iam traying my best.

1st you need to change the title of the thread, this is not a problem with your procharger. Without asking a bunch of other questions, The problem sounds like a timing problem. If you have not tuned the PCM, there is the problem of the PCM thinking it is still a 350. So in addition to your timing your fuel is going to be off also.
You need to get to a dyno with load capabilities on it, and tune the car, you cannot tune it driving it on the street.
Since when can you not tune your car on the street? It might not be the most safe thing to do(depending where you live) but you can surely do so if you have a nice stretch of road to do it on(after your LTFT/injector flow rate table is taken care of).

thanks all for the information.
and i will keep you in tach.
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Yes,you can tune it on the street with a scanner and wideband.That is how I do about 80% of my forced induction cars
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Yes,you can tune it on the street with a scanner and wideband.That is how I do about 80% of my forced induction cars

Since when can you not tune your car on the street? It might not be the most safe thing to do(depending where you live) but you can surely do so if you have a nice stretch of road to do it on(after your LTFT/injector flow rate table is taken care of).
While drving down the road, you cannot monitor every cell in the VE table. If you are not using HP Tuners you will not know what I am talking about, anyway, I will continue.
While watching the histogram, you need to be able to map MAP over RPM, you cant do that on the road. because you will never hit every cell.
You need to get a dyno that will hold the car at a certain RPM.
Once the car is being held, you press in the pedel and you can move through each fuel cell in the ve table at that RPM range, tune it to the specified A/F Ratio, then move to the next RPM range. Takes about 2 hours to tune the entire table.
Then you go back and do the same for timing.
Then your car is tuned about 98% of what GM would have done with your car had they tuned it.
There is a class you can take called EFI101.com. I learned more in that class than any class I ever took in School. PERIOD.
You cannot tune a car on a Dynojet. Well that is not entirely true, you can tune WOT on a dynojet, but you cannot tune part throttle drving. Anyone that tells you that they can tune your car by driving it around town is entitled to their own opinion, regardless of how wrong it is.
Last edited by Bryan Wilkinson; Jan 23, 2005 at 09:12 AM. Reason: edit
While drving down the road, you cannot monitor every cell in the VE table. If you are not using HP Tuners you will not know what I am talking about, anyway, I will continue.
While watching the histogram,....
I do use HPTuners. I too use the histogram..you can see your timing/kr/ltft/stft. I basically look at the ltfts and get them slightly negative...except(you might disagree with me on this) when I'm sitting there at idle at a stop light(why run rich when there when you're just sitting there at idle).
As far as hitting every cell, you can vary your throttle while driving throughout the rpm range and different TPS%'s. Yes, it takes a looooooong time. That's why I said find a good stretch of road. I've tuned my car and I have tuned 2 NA cars back east when I was there. I told the guys up front to be ready for it to take a few hours. OTR testing is better then just guessing or "on the dyno". Both guys are very happy with their tunes. Dropped roughly .5 seconds and gained a solid 3 mph afterwards(same track, simular conditions). I'm not a tuning master, I've just had a blower on my car for 70K miles(P1SC) and never had to replace anything but a pushrod in my engine(my shifting got stupid racing one night). Oh..did I mention I have a stock engine?
Firehawk, didn't mean to hijack your thread...someone(slowhawk?) earlier also said to not floor it until you get your LS1edit. I would agree. If you need any help, just ask...that's why we have this area on the message board. Good luck with your blown Hawk, you'll have a lot of fun
but ther is one thing that i need to know what is better to have HPtuner or ls1edit. because thear is one of my frind how is going to seal his HPtuner and its brand new he never used it.what do you all think should i bay it or gust whait for the ls1edit to get to me.
but ther is one thing that i need to know what is better to have HPtuner or ls1edit. because thear is one of my frind how is going to seal his HPtuner and its brand new he never used it.what do you all think should i bay it or gust whait for the ls1edit to get to me.
if it was me, I'd get the HPTuners. it comes with a scanner as well as the edit and flasher and if you're computer loses power/goes blue screen, you don't have to have GM reflash your car's computer. That's just my $.02. I'm very happy with mine.
What injectors did you go with and how many # of boost. What year is your hawk. If you need help, just ask. Slowhawk offered before, I will also offer a file to help you get started. Oh, make sure that the HPTuner he has is the same year as your car. They're year locked not VIN locked like LS1edit.
Slowhawk. can you send me file if i am using HPtuner or not if you can soo i can send you a list of mode of my car.
Thank you very much for your help and cooperation in this matter.
Bryan, are you saying that a car can not be tuned for part throttle on a dyno...period, or just with ls1edit, or what? Does that include Accel DFI's Calmap?
Thanks,
Tom
Slowhawk. can you send me file if i am using HPtuner or not if you can soo i can send you a list of mode of my car.
Thank you very much for your help and cooperation in this matter.


