Author Topic: I've searched  (Read 17537 times)

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Offline phil_long

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Re: I've searched
« Reply #60 on: February 06 2013, 11:48:32 AM »
Im talking about the future Steve. I do want to eventually get faster.  Raising the Fp through the chip is what I was referring to. Finally tired of me huh? I understand. This car is getting on my nerves just as much as im getting on yours, or anyone else who gets sick of reading my posts.  But this is why beer and alcohol exists!!! :cheers:

Offline Steve Wood

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Re: I've searched
« Reply #61 on: February 06 2013, 12:24:05 PM »
There are no wires connected to the fuel pressure regulator so there is no way that the ecm can control fuel pressure. :)

The ecm controls the duty cycle of the solenoids inside the injectors which gives it the ability to change the time the injectors spray (pulsewidth) when triggered on a given firing sequence.
The chip controls the fuel curve instructions and the programming varies this as I understand it.

The fuel pressure remains where it was set and varies with vacuum and boost.
Steve Wood

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A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline phil_long

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Re: I've searched
« Reply #62 on: February 06 2013, 12:34:58 PM »
Damn, you got me. Lol. This is good learning.  So, when one increases the boost manually, the FP is suppose to rise 1 to 1 with it.  So, in essense, i wont have to touch anything.  I be tripping every now and then.  Thanks for keeping me balance.  makes sense.

Offline phil_long

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Re: I've searched
« Reply #63 on: February 06 2013, 12:37:38 PM »
You should quiz me.  I promise I understand!!!!!! half the time i dont be thinking before I type. Kind of like being so excited to get in the shower with a lady and forgetting to take off your socks due to your intent to impress her because you already ready!! :D

Offline earlbrown

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Re: I've searched
« Reply #64 on: February 06 2013, 12:58:47 PM »

I think it is time to leave you with Earl or Ed :)

Probably going to have to be Ed.  I don't think I can tune around iffy boost control over the interewebz.... . and there's already lots of "Whats the best head gasket" treads out there.
« Last Edit: February 06 2013, 01:03:59 PM by earlbrown »
'87 GN - 4.2L SFI Turbocharged innercooled V6 - Chrome valve covers - supra pump - 14" K&N - 52mm throttlebody - rocker shaft supports -  1/2 intake spacer - TB coolant bypass - 3" ATR exhaust tip - Alum intake pipe - NOS timing cover - chip - relocated charcoal canister - CR42's - stock

Offline Steve Wood

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Re: I've searched
« Reply #65 on: February 06 2013, 01:35:07 PM »
Damn, you got me. Lol. This is good learning.  So, when one increases the boost manually, the FP is suppose to rise 1 to 1 with it.  So, in essense, i wont have to touch anything.  I be tripping every now and then.  Thanks for keeping me balance.  makes sense.

Not exactly....the more boost you run, the richer the A/F needs to be so you need to run richer at 25 psi than you do at 17 psi.  Therefore, if you buy a chip that is programmed for approx 25 psi, it will most likely be blowing black smoke at 17.  So you will need to program the chip to cut down the pulsewidths so it is putting out less fuel....or vice versa if you have a chip programmed for 17 and want to run 25.

I suspect that 95% of us that run alky, set the boost close to 25 psi, tune for that, and never touch it again.  After all, you don't have to use 25 # unless you want to plant your right foot on the floor at every light.
Steve Wood

http://www.vortexbuicks-etc.com

A lot of broken parts does not make you a racer; it makes you a slow learner.

 

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