3-5psi?
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Elder User
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From: Canada, ON New Market
3-5psi?
hey guys
recently bought a supercharger off the net. Was wondering if I was to run it at 3-5 psi of boost would great mods be needed? compter tunning,feul regulator/pump, timing, etc...
I own a v10 99
Regards
Skoda
recently bought a supercharger off the net. Was wondering if I was to run it at 3-5 psi of boost would great mods be needed? compter tunning,feul regulator/pump, timing, etc...
I own a v10 99
Regards
Skoda
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From: Calhoun GA
It'll need a more fuel and less timing. You'll probably want to look into some aftermarket tuning; it's going to need a little more fuel and a little less timing. You may need to close the gap on the plug a little, or go with a set that have a colder heat range than stock.
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From: Canada, ON New Market
Thanks for the reply blurry,
So to deal with the feul problem, I can just swap ot the old injectors (22lbs correct?) for 25lbs. Now would I have to adjust the feul curve for the ecu?
The OEM feul pump shouldn't have any problems flowing the new injectors?
How many degrees should it be retarded? how do I go about retardind the timing?
Regards
Skoda
So to deal with the feul problem, I can just swap ot the old injectors (22lbs correct?) for 25lbs. Now would I have to adjust the feul curve for the ecu?
The OEM feul pump shouldn't have any problems flowing the new injectors?
How many degrees should it be retarded? how do I go about retardind the timing?
Regards
Skoda
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From: Calhoun GA
You'll benefit with some type of aftermarket tuning with a boosted application and larger injectors; for both power and longevity.
A general rule of thumb is to retard the total timing 1 degree for every pound of boost. It really depends on the application though; air charge temps, fuel octane, etc...play a larger role for timing advance.
I'd suggest putting a fuel pressure gauge on it, something you can watch while driving. The injectors would be a good start, but I'd recommend installing a fuel pressure gauge and watch it while you're driving. If the pressure drops, you'll need to do more to your fuel system; tuning can only do so much.
A general rule of thumb is to retard the total timing 1 degree for every pound of boost. It really depends on the application though; air charge temps, fuel octane, etc...play a larger role for timing advance.
I'd suggest putting a fuel pressure gauge on it, something you can watch while driving. The injectors would be a good start, but I'd recommend installing a fuel pressure gauge and watch it while you're driving. If the pressure drops, you'll need to do more to your fuel system; tuning can only do so much.
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From: Canada, ON New Market
"aftermarket tuning" How would I go about doing this? I just email a place that burns chips and tell them my setup? or are you talking about those diablo,jet programers?
"A general rule of thumb is to retard the total timing 1 degree for every pound of boost. It really depends on the application though; air charge temps, fuel octane, etc...play a larger role for timing advance"
exactly the noledge I wanted to hear, thank you :-)
when having the feul preassure gauge installed, what desired range should I be looking for?
Regards
Skoda
"A general rule of thumb is to retard the total timing 1 degree for every pound of boost. It really depends on the application though; air charge temps, fuel octane, etc...play a larger role for timing advance"
exactly the noledge I wanted to hear, thank you :-)
when having the feul preassure gauge installed, what desired range should I be looking for?
Regards
Skoda
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From: Calhoun GA
Higher fuel pressures will force more fuel through the injectors and this can be done with a larger fuel pump, and/or FMU (fuel management unit). An FMU operates much like a fuel pressure regulator, except that it increases the fuel pressure based on boost pressure.
There are quite a few companies that can do aftermarket tuning; SCT, Diablo and Banks are just a few that I can think of and I believe there are some supporting vendors here that can help you with that as well.
Like you said, just let them know your setup, and be as detailed as you can (even the main purpose of your vehicle and the fuel octane you plan to use), and they can make a program for you.
The best way is to put your truck on a dyno and have it tuned with the fuel you plan to use. If that isn't an option, then mail order tuning is a good alternative.
There are quite a few companies that can do aftermarket tuning; SCT, Diablo and Banks are just a few that I can think of and I believe there are some supporting vendors here that can help you with that as well.
Like you said, just let them know your setup, and be as detailed as you can (even the main purpose of your vehicle and the fuel octane you plan to use), and they can make a program for you.
The best way is to put your truck on a dyno and have it tuned with the fuel you plan to use. If that isn't an option, then mail order tuning is a good alternative.
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Originally Posted by Blurry94
It'll need a more fuel and less timing. You'll probably want to look into some aftermarket tuning; it's going to need a little more fuel and a little less timing. You may need to close the gap on the plug a little, or go with a set that have a colder heat range than stock.
i would close the gap to about .040 since 3.5psi is mild. and also got 1 step colder on the plug, and get a general tune up like cap/rotor wires and coil. it is going to take more power to make the spark jump that gap, thats why you close the gap
also how are you coming to 3-5psi? is that what the kit says? also is the kit made for your engine? there are alot af variables that dictate how much boost a supercharger wil make, the same blower on 1 car making 5psi is not going to make that same 5psi on another car.
also just adding a higher PSI or flow fuel pump will not automatically allow more fuel to flow thru the injectors, there is a fuel regulator on the fuel rail that buumps the fuel rail pressure down. with any good kit comes an additional inline fuel pump to assist the stock fuel pump.
an aftermarket tuner will work but getting it n a dyno is the best way to do it
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From: Calhoun GA
As I stated previously, a dyno tune is the best way to go.
The factory FPR will increase the pressure when the vacuum decreases (under heavy throttle conditions), it doesn't necessarily maintain a certain set point; it's a mechanical device. It'll actually increase the fuel pressure 1psi of fuel pressure per 1 psi of boost.
The stock V10 pistons are not forged, they're hypereutectic and they don't hold up well at all to pre-detonation. There is nothing wrong with pulling some timing to keep things safe until it gets proper tuning. I'm not going to recommend it to anyone that they leave their timing alone (stock), even if it is a low boost application. And higher fuel octane isn't the only thing to prevent pre-det.
The factory FPR will increase the pressure when the vacuum decreases (under heavy throttle conditions), it doesn't necessarily maintain a certain set point; it's a mechanical device. It'll actually increase the fuel pressure 1psi of fuel pressure per 1 psi of boost.
The stock V10 pistons are not forged, they're hypereutectic and they don't hold up well at all to pre-detonation. There is nothing wrong with pulling some timing to keep things safe until it gets proper tuning. I'm not going to recommend it to anyone that they leave their timing alone (stock), even if it is a low boost application. And higher fuel octane isn't the only thing to prevent pre-det.
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