4agze Turbo Questions

[z0ton]

Does anyone know how much boost these would handle with a T3/T4 turbo? Ive got a AE101 4agze and not sure if I need to upgrade my injectors. Im gunna have a 500hp fuel pump and aftermarket FPR.

Ive had a quick read around the forums and one person said their td04 maxed the injectors out at 13psi so im guessing im gunna need new ones...

What other injectors fit and what type am I looking for?

[sergei]

The maxing out of injectors is not boost related.
When you are going to put new injectors (different size) you will need new ecu. unless you are running aftermarket one, then you will need to retune it.

[Crucible]

If your going to run on standard ecu use stock injectors but get a fuel check done. People have had differant results with differant turbos and differant boost levels with stock map ecus.

like sergei says you can only run bigger injectors with an aftermarket ecu to control pulse width.

stock injectors are supposedly good for 200hp and 440cc injectors are good for on or just under 200kw atw.

2jzgte and 7mgt injectors will go straight into gze rail and the plugs fit also.

[z0ton]

The other thing I was wondering was is it better to have the turbo mounted at the top or bottom of the manifold? In terms of how easythe piping etc is.

Any help is appreciated.



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[CozmoNz]

youll find it far easier with a low mount turbo... you have far more room, and high mount is just bling.

[z0ton]

I know all these questions would of been asked before but I cant find anything cause its usually written in the middle of some random thread.

Anyway where are some places in Auckland to get some piping for the intercooler? I hear its best to get aluminium so im after some bends and straight pieces.

[Bazda]

I know all these questions would of been asked before but I cant find anything cause its usually written in the middle of some random thread.

Anyway where are some places in Auckland to get some piping for the intercooler? I hear its best to get aluminium so im after some bends and straight pieces.

tube bending in east tamaki for alloy bends.

with ur standard ecu and injectors I would say around 13psi would be ur limit of boost.

[Lloyd]

youll find it far easier with a low mount turbo... you have far more room, and high mount is just bling.

Depends on what part you're talking about, both have their good and bad points for working on. I'd say high mount is nicer (if we're generalising) as everything on the turbo is right there

[flygt4]

low mount can be a hassle to work on at a later stage. i pretty much need to remove my radiator to do anything involving the turbo or first piece of piping. ive got it down to a 2 min job now but its still slightly irritating.
i think i had it in and out 5 or 6 times last weekend while trying to get the first pipe off the compressor to stop popping off

[z0ton]

Im looking at buying a T3/T4 turbo and im not sure what BOV and wastegate to buy. Is it worth buying a tial wastegate for twice the price and an expensive BOV? Are the cheap ones nasty or are they alright? I dont exactly want to spend a lot of money if I dont need to.

[flygt4]

consider what could happen if they fail. you do get what you pay for, theres no point paying 1kplus for a turbo if you're going to risk it with a dodgy wastegate.

probly not such an issue for the bov , but id go for a reputable wastegate seeing as its dealing with your boost levels. i could just be paranoid tho seeing as a boost leak recently ended my turbos life quite quickly

[Skin]

Gavins got a xspower wastegate hasnt he? And thats worked well for him so far hasnt it? Oh hang on.......

[Bazda]

The cheap wastegates work fine, you just gota pull them apart and locktite the grub screws that hold the diaphram to the shaft and also the big nut that holds the diaphram to the valve and its all sweet from there.

any bov will do, dont get a immitation ssqv i found it cant release enough air.

[Crucible]

any bov will do, dont get a immitation ssqv i found it cant release enough air.

yeah they defeat the whole purpose, cheap bling!!

just changed the crap ssq copy I had and fitted a Tial 50mm copy, am still getting slight compressor surge on low boost shifts upto around 4psi. Spring looks quite heavy though, will look into a differant rate spring

how much compressor surge is normal and safe anyways?

[Bazda]

low boost is ok, i cut the spring in my copy one, just a little bit at a time so at idle it was just about to open and was pretty sweet after that.

[z0ton]

So you reckon a wastegate like this would be alright?
http://www.trademe.co.nz/Trade-Me-Motor ... 153604.htm

And a BOV like this?
http://www.trademe.co.nz/Trade-Me-Motor ... 742967.htm

[Crucible]

low boost is ok, i cut the spring in my copy one, just a little bit at a time so at idle it was just about to open and was pretty sweet after that.

ok sweet, yeah I was thinking about cutting the spring a little haha, when reving it without load it seems to a little delayed to open when the throttle is closed, thats the surge im getting I think......

have to admit they're a pretty cool looking bov

[Bazda]

also taking a lien straight from the manifold is the best, if you T it off anything it doesnt respond as well I found, and use the fat vacuum line thats the same i/d of the fitting on the bov.

[matt dunn]

I had to do the opposite with my BOV.

It had an adjustment screw for soft and hard which adjusts the spring tension.

I had to dismantle it and make a large thick spacer to go under the spring to give it a lot more tension on the spring, otherwise it would open and leak boost, even with good pressure on the top of it.

The car now sounds so different on gear chaanges, and I can now run higher boost.

[Crucible]

So you reckon a wastegate like this would be alright?
http://www.trademe.co.nz/Trade-Me-Motor ... 153604.htm

And a BOV like this?
http://www.trademe.co.nz/Trade-Me-Motor ... 742967.htm

cant vouch for either but they seem to fairly good quality, as long as the diaphram and valve are made from the same materials as the well known brands they should be fairly decent.

any bov should do bar ssq copys, I went with the tial 50mm because a couple of guys here used them and they seem to hold well on high boost..