Oh no ... injector seals!

[paulmc]

Just been outside, horrible night. I have nothing in either pipe both are soft and fully squeezable.

[WingedBeast1968]

Originally Posted by paulmc

Just been outside, horrible night. I have nothing in either pipe both are soft and fully squeezable.

Thanks for doing that mate.

How weird. I'm confused

[WingedBeast1968]

To be absolutely certain, you couldn't pull the end off and have a look inside could you?

[paulmc]

its pissing with rain and dark !!!!!!!!

the things i do. Give me 5 mins

[WingedBeast1968]

Originally Posted by paulmc

its pissing with rain and dark !!!!!!!!

the things i do. Give me 5 mins

You are a very handsome and intelligent man

[paulmc]

Originally Posted by WingedBeast1968

You are a very handsome and intelligent man

You clearly dont know me lol

Ok, muppet alert you are right. I have a some sort of restrictor on my driver side bank. it was tight againt the bollom hose connection so could feel nothing until i took the hose off the top connection. Sorry cant take a pic its too dark to get the hose off the bottom pipe. Taking the hose off the top pipe allowed me to feel the slug of metal in the pipe.

Deffo nothing on the passanger side.

like i tell my kids, do it once do it right, tripped on my own words. Sorry for the confusion.

[WingedBeast1968]

That's okay, thanks again.

Cruising, the breathers actually suck air out of the turbo inlet, vacuum caused by the PCV and plenum. Why restrict one bank and not the other?

That must surely cause a differing air volume between bank 1 and 2?
Maybe that's why the bank balance is required. Balanced, despite different levels of bleed off through the breathers.

I need to get my engine design book out again.

Once again, you're a star dude! Thank you

[keithmac]

Maybe so you don't have stagnant air in the valve covers?.

Good luck, sounds like you may have a rich spot in your fuel map and the short term fuel trim does a good job for the most part to cover it up.

Retarding the ignition as softens the resumption throttle after coasting.

I run an OS Giken R3C clutch in the GTO, tuned decel fuel cut out completely due to the harsh reaction when coming back on throttle.

Could the gearbox have anything to do with it, maybe it should slip the clutch slightly to soften the transition?.

I think the actual torque differnce at low throttle between 14.7:1 and 12:1 afr would be negligible?.

What injectors have you got fitted?.

[paulmc]

Originally Posted by WingedBeast1968

That's okay, thanks again.

Cruising, the breathers actually suck air out of the turbo inlet, vacuum caused by the PCV and plenum. Why restrict one bank and not the other?

That must surely cause a differing air volume between bank 1 and 2?
Maybe that's why the bank balance is required. Balanced, despite different levels of bleed off through the breathers.

I need to get my engine design book out again.

Once again, you're a star dude! Thank you

No probs, happy to help.

You got logs you can post up. or I can do logs of mine at idle etc if that helps?

[WingedBeast1968]

Maybe so you don't have stagnant air in the valve covers?.

What's the restriction on bank 1?

Good luck, sounds like you may have a rich spot in your fuel map and the short term fuel trim does a good job for the most part to cover it up.

Stock map does it too. Defo an issue

Retarding the ignition as softens the resumption throttle after coasting.

Okay

I run an OS Giken R3C clutch in the GTO, tuned decel fuel cut out completely due to the harsh reaction when coming back on throttle.

Could the gearbox have anything to do with it, maybe it should slip the clutch slightly to soften the transition?.

It does, but no amount of adjustment can dial it out. Touch points and clutch capacities are -7 to +7 range. Should be around zero for stock.

I think the actual torque differnce at low throttle between 14.7:1 and 12:1 afr would be negligible?.

It's pretty sensitive to torque. You can feel it surge forward.

What injectors have you got fitted?

Stock injectors. 570cc/min

[WingedBeast1968]

Originally Posted by paulmc

No probs, happy to help.

You got logs you can post up. or I can do logs of mine at idle etc if that helps?

I'll post up some logs tonight. I've got tonnes of data, through Cobb AP and EcuTek. All showing the same thing.
Stock map, stage 1, stage 2, stage "stock like". All the same.

[WingedBeast1968]

Fuel cut overrun for a short time, then very light throttle pick up.
AFR bottoms out at 12.2; not good.

datalog14.csv

[WingedBeast1968]

This one is STFT going to 120% under same driving conditions.

datalog13.csv

[WingedBeast1968]

Originally Posted by paulmc

No probs, happy to help.

You got logs you can post up. or I can do logs of mine at idle etc if that helps?

A log of your car off throttle coasting, and then very light throttle pick up would be a great help.

[paulmc]

Busy fitting a new kitchen, sorry not had the time.

log attached I did a while ago, idle, cruise (light throttle) and full load / boost, only runing 1 bar of boost in log

[WingedBeast1968]

Originally Posted by paulmc

Busy fitting a new kitchen, sorry not had the time.

log attached I did a while ago, idle, cruise (light throttle) and full load / boost, only runing 1 bar of boost in log

Thanks mate. Good luck with the kitchen.

[WingedBeast1968]

Originally Posted by paulmc

Busy fitting a new kitchen, sorry not had the time.

log attached I did a while ago, idle, cruise (light throttle) and full load / boost, only runing 1 bar of boost in log

Well, I hope she's all better now.
That log is proper messy man. Is that with big injectors?
It looks like you've a vacuum leak, but the opposite to mine.

[paulmc]

Originally Posted by WingedBeast1968

Well, I hope she's all better now.
That log is proper messy man. Is that with big injectors?
It looks like you've a vacuum leak, but the opposite to mine.

Not looked at it in detail. Yes ID1000 injectors, big turbos etc.

I was going to pressure test the system after I had the engine out but not had the time. It certainly goes well.

What you see in the log??

How's yours any further on finding the problem??

[WingedBeast1968]

The trims look like either the tune is a bit off, or there's a leak somewhere.
She's adding fuel under cruising, and removing it under load, but can't quite make it's mind up.

I've got the opposite to that, and a definite problem somewhere.
Mine is still messing about, but I've noticed the turbo outlet pipe on bank 1 is oily and sooty (no sweep), which can only be coming from inside the pipe.
When the temperature in the garage drops below 40, I'm taking them both off to have a look.

Better since the injector seal replacement though, so I'm on the right track.

[paulmc]

Originally Posted by WingedBeast1968

The trims look like either the tune is a bit off, or there's a leak somewhere.
She's adding fuel under cruising, and removing it under load, but can't quite make it's mind up.

I've got the opposite to that, and a definite problem somewhere.
Mine is still messing about, but I've noticed the turbo outlet pipe on bank 1 is oily and sooty (no sweep), which can only be coming from inside the pipe.
When the temperature in the garage drops below 40, I'm taking them both off to have a look.

Better since the injector seal replacement though, so I'm on the right track.

Ah that's ok. This was base tune just to see how it was going. 1.0bar on 95 got 5 maps after that one.

Good to gear it's going better. Mine had a bit of oil but deffo no soot.