How much Boost on Stock Internals?

abhattan · 01-27-2007, 03:26 AM

okay..So do I have to use the Lexus AFM, or will the VPC be good enough? I will be using it in conjunction with a GCC anyway.

Supra2NR · 01-27-2007, 07:02 AM

Quote:

Have you heard of fuel cut?

i was boostin a steady 12 without hitting any fuel cut

but then my bov broke, and the car was overboostin nut still
i was boostin a steady 10 until my bov got worst
never hit fuel cut

Quote:

okay..So do I have to use the Lexus AFM, or will the VPC be good enough? I will be using it in conjunction with a GCC anyway.

get an afc, a new pump, you can still stretch out the injectors

88Tsupra · 01-30-2007, 06:18 PM

hey whats the best injector brand to go with

dcrusupra · 02-01-2007, 09:25 PM

Quote:

Originally Posted by 88Tsupra

hey whats the best injector brand to go with

Dont ever buy Venom. Your best bet would be RC Injectors.

abhattan · 01-30-2007, 11:01 PM

You guys sound like you know enough, but there is no need ot fight. I don't have much to spend on this car right now, therefore, when I do something, I like to do it right the first time and not half step. If I use the HKS VPC as an afc, will that be sufficient? Like I said, I don't want to buy something now and in a about a year, by the thing I should have bought when I do my rebuild.

IHateHacks · 01-31-2007, 01:11 AM

First of all AFM's run on voltage not frequency, its not a motherboard cpu. Ever read live data from a scan tool?

Guess what happens when there is not enough fuel? Detonation. Air is plentyful, you will never run out of air on a motor. It's fuel you will run out of. Which causes the Air Fuel ratio to spike, causing detonation. All of this happens faster than you can blink your eye.

"And detonation happens because the inside of the motor is getting so hot when the piston is on the way up it detonates the fuel before the sparkplug does"

Nope, thats preignition. Detonation is an explosion inside the cylinder no matter what stroke the piston is on and it usually results in a hole in your cylinder block. I've seen it before.

"also not because of fuel"- No, its because of lack of fuel that the stock fuel pump can not deliver.

"It is not the fuel pump failing."

Never said that, please quote me where I stated that.

Isphius · 02-01-2007, 06:57 AM

Quote:

Originally Posted by IHateHacks

Fuel cut is when the fuel pump can no longer flow enough fuel to supply what the injectors are demanding.

This is where you said the fuel pumps fails. Not fails at life, but fails its job. The fuel pump can flow more than enough for the stock injectors. The ECU causes fuel cut, its a safety feature. It doesnt "just happen"

Quote:

Originally Posted by IHateHacks

First of all AFM's run on voltage not frequency, its not a motherboard cpu. Ever read live data from a scan tool?

Guess what happens when there is not enough fuel? Detonation. Air is plentyful, you will never run out of air on a motor. It's fuel you will run out of. Which causes the Air Fuel ratio to spike, causing detonation. All of this happens faster than you can blink your eye.

"And detonation happens because the inside of the motor is getting so hot when the piston is on the way up it detonates the fuel before the sparkplug does"

Nope, thats preignition. Detonation is an explosion inside the cylinder no matter what stroke the piston is on and it usually results in a hole in your cylinder block. I've seen it before.

"also not because of fuel"- No, its because of lack of fuel that the stock fuel pump can not deliver.

"It is not the fuel pump failing."

Never said that, please quote me where I stated that.

Turbo AFMs produce a frequency. Thats how the ECU knows how much air is going by. And detonation is when the air/fuel is ignited by a source other than the spark plug, Mr technical. And it does not blow a hole in your cylinder, it makes a knocking or pinging sound. ANd no, Im not denying that it can break your block, but it does not always happen. Preignition is when it just happens to ignite because it touches a hot piece of metal. Pre Ignition is a form of detonation. And there is no way the air/fuel can ignite other than the compression stroke, because all other times it isnt inside the cylinder. Please do not try to correct me because your ego is bruised, I only do it so people can read things and know what they are talking about. Im not interested in starting any flame wars or "who knows more" contests. I know what I am talking about, And if i dont, I keep my mouth shut. So you should do the same.

Isphius · 02-01-2007, 07:22 AM

How an AFM works
http://www.supracentral.com/content.php?article.88

Detonation and preignition
http://www.misterfixit.com/deton.htm

01-30-2007, 06:18 PM	#3
88Tsupra 12psi boost Join Date: Jan 2007 Location: long beach, CA Posts: 252	hey whats the best injector brand to go with __________________ 88turbo targa-white original Pin Stripe custom intake-Tenzo filter.....Momo racing seats and steering wheel... apexi exhaust tip-custom 3" piping. Replaced with RSR GT II NGK plug and wires HID conversion head lights HKS Turbo Timer Type-1 (in black) Tial BOV BIC DDP

02-01-2007, 07:22 AM	#8
Isphius 500whp yet? Join Date: Nov 2005 Location: Long branch, NJ Posts: 1,006	How an AFM works http://www.supracentral.com/content.php?article.88 Detonation and preignition http://www.misterfixit.com/deton.htm __________________ Yay the supra assistant is gone!!! WEEE!!

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01-27-2007, 03:26 AM	#1
abhattan 3" Exhaust Join Date: Oct 2006 Location: Brentwood, New York Posts: 162	okay..So do I have to use the Lexus AFM, or will the VPC be good enough? I will be using it in conjunction with a GCC anyway.

01-30-2007, 11:01 PM	#5
abhattan 3" Exhaust Join Date: Oct 2006 Location: Brentwood, New York Posts: 162	You guys sound like you know enough, but there is no need ot fight. I don't have much to spend on this car right now, therefore, when I do something, I like to do it right the first time and not half step. If I use the HKS VPC as an afc, will that be sufficient? Like I said, I don't want to buy something now and in a about a year, by the thing I should have bought when I do my rebuild.

01-31-2007, 01:11 AM	#6
IHateHacks 20psi boost Join Date: May 2006 Location: New Haven/Hamden Posts: 793	First of all AFM's run on voltage not frequency, its not a motherboard cpu. Ever read live data from a scan tool? Guess what happens when there is not enough fuel? Detonation. Air is plentyful, you will never run out of air on a motor. It's fuel you will run out of. Which causes the Air Fuel ratio to spike, causing detonation. All of this happens faster than you can blink your eye. "And detonation happens because the inside of the motor is getting so hot when the piston is on the way up it detonates the fuel before the sparkplug does" Nope, thats preignition. Detonation is an explosion inside the cylinder no matter what stroke the piston is on and it usually results in a hole in your cylinder block. I've seen it before. "also not because of fuel"- No, its because of lack of fuel that the stock fuel pump can not deliver. "It is not the fuel pump failing." Never said that, please quote me where I stated that.