94 octane not pulling

[Fabron757]

Hey don't get on it until u get the problem fixed. If something don't feel right, don't chance it.

[Adeets]

Originally Posted by Fabron757

Hey don't get on it until u get the problem fixed. If something don't feel right, don't chance it.

I second this motion.

[Scalzo]

So i've got a response from Toni, and its not within the Tune, it's because I don't have my injectors or fuel pump. So i'll order it next year. But problem is, I hope there is no damage as i've already done 2 drift sessions and tons of 1/4 miles. Grrrrrr...

[ecko04]

Which trim kit do you have and how much boost are you running?

Last I checked, unless he sold it, @Sportsguy83 was selling a good combo of fuel injectors and fuel pump.

And yes, you're causing damage if you're starving the motor of fuel. Boost with a lack of fuel can be quite catastrophic.

With the 57 trim 7 psi is the max for the stock fuel pump and injectors, not sure which is the bottleneck so I said both. As a safety precaution and to give a bit more of a safety buffer, I err on the side of upgrading the injectors and pump when boosting it.

[King Tut]

Originally Posted by ecko04

Last I checked, unless he sold it, @Sportsguy83 was selling a good combo of fuel injectors and fuel pump.

He sold them already and got paid in $1 bills.

[Scalzo]

Originally Posted by ecko04

Which trim kit do you have and how much boost are you running?

Last I checked, unless he sold it, @Sportsguy83 was selling a good combo of fuel injectors and fuel pump.

And yes, you're causing damage if you're starving the motor of fuel. Boost with a lack of fuel can be quite catastrophic.

With the 57 trim 7 psi is the max for the stock fuel pump and injectors, not sure which is the bottleneck so I said both. As a safety precaution and to give a bit more of a safety buffer, I err on the side of upgrading the injectors and pump when boosting it.

I got the 57 trim, on my boost gauge i boost peak at 8-9 PSi.

I'll be buying fuel injectors and pump soon. Just waiting for my UEL headers to come in! been a month already :/

[ecko04]

Originally Posted by Scalzo

I got the 57 trim, on my boost gauge i boost peak at 8-9 PSi.

I'll be buying fuel injectors and pump soon. Just waiting for my UEL headers to come in! been a month already :/

Yeah outside of the range for stock fueling. If you insist on boosting, safely, I would dial the boost back to 5-6psi and wait for the injectors and pump, along with a tune adjustment, before cranking it back up.

[Scalzo]

i dont know why its boosting that high.. I dont have a mbc or ebc..

[ecko04]

Originally Posted by Scalzo

i dont know why its boosting that high.. I dont have a mbc or ebc..

Well that's another issue. Have you changed the the 5psi base pressure spring?

You're doing some over boosting there. Without some boost controller that spring should max around 5.4psi.

[Scalzo]

Originally Posted by ecko04

Well that's another issue. Have you changed the the 5psi base pressure spring?

You're doing some over boosting there. Without some boost controller that spring should max around 5.4psi.

It was the yellow spring for waste gate right?

[mad_sb]

Originally Posted by Scalzo

Ever since I put the 3" turbo back i've had this prob, I'm putting the new fuel pump next summer along with injectors. I called Toni he said hes gonna check the datalog

This, larger exhasut on a turbo car = less backpressure in the turbine and exhaust manifold section = more boost. Your boost went up when you installed this exhaust. Your tracking load ranges that were probably not tuned and you are probably beyond the fueling capacity now, or some combination of those two things. Also, if you are using an MBC or just spring pressure, you will make more boost in the higher gears. You need to get the boost back to were you were tuned or where the stock fuel system can keep up. If you need to turn the boost down, get a softer spring for your wastegate, and an mbc if you don't already have one.

[Scalzo]

Originally Posted by mad_sb

This, larger exhasut on a turbo car = less backpressure in the turbine and exhaust manifold section = more boost. Your boost went up when you installed this exhaust. Your tracking load ranges that were probably not tuned and you are probably beyond the fueling capacity now, or some combination of those two things. Also, if you are using an MBC or just spring pressure, you will make more boost in the higher gears. You need to get the boost back to were you were tuned or where the stock fuel system can keep up. If you need to turn the boost down, get a softer spring for your wastegate, and an mbc if you don't already have one.

So basically to be properly set up I need the following:
- injectors
- Fuel pump
- EBC or MBC
and of course a retune

[Andy@FA20Club]

Originally Posted by mad_sb

This, larger exhasut on a turbo car = less backpressure in the turbine and exhaust manifold section = more boost. Your boost went up when you installed this exhaust. Your tracking load ranges that were probably not tuned and you are probably beyond the fueling capacity now, or some combination of those two things. Also, if you are using an MBC or just spring pressure, you will make more boost in the higher gears. You need to get the boost back to were you were tuned or where the stock fuel system can keep up. If you need to turn the boost down, get a softer spring for your wastegate, and an mbc if you don't already have one.

[mad_sb]

Originally Posted by Scalzo

So basically to be properly set up I need the following:
- injectors
- Fuel pump
- EBC or MBC
and of course a retune

And the softer spring for your wastegate. Boost controllers bleed reference pressure away from the wastegate diaphragm allowing you to raise boost.

In your case, you need to lower boost so you don't turn your motor into a frag gregnade. A softer wastegate spring will lower the base boost pressure for now until you can get the tune and the fuel supply sorted out.

If the boost is too low with the softer spring, then you can add a boost controller to get it back into the range you were tuned for.

As for electronic vs manual... most EBC's are no better than MBC's at maintaining the same boost in each gear. They do tend to improve spool though.

My two favorite EBC are:
Apexi AVC-R - hands down the best EBC i have ever tuned. It has per gear base wastegate duty cycle compensation and per gear boost targets. Yes, 1990 called and wants it's superAFC back, but once you get past the looks it is the tits.

Greddy Profec B Spec 2 - best budget ebc. easy to setup, has overboost boost cut. Just make sure you get a real one and not an ebay counter-fit one.. those are a nightmare and create a sawtooth boost pattern from hell.