Turbocharged 4A GZE

**SG-EE100** · 01-02-2006, 11:15 PM

Hi people. Just turbocharged my 4agze engine. Thanks for the help. These are the things that i did. Took out the supercharger and use a 4age intake manifold. VF35 turbo, Evo 8 fuel pump, Sard fuel regulator, Vr4 intercooler, Greddy E-manage piggyback ECU and a OER boost controller. Went for dyno last week , boost up to 1.3 bar and it came out like 295bhp. Quite content with the outcome cos dun think any guys in Singapore have this kind of results on their Ae101 and also i didn't really do much to the engine. Guys out there who turbocharged their gze, is it possible to boost higher? I am still using the stock piston and stock Injector.Thanks.

**mullett** · 02-02-2006, 12:16 AM

It's possible to boost higher for sure, it's just a matter of how long you want your engine to last. Frankly, I think that's a bloody good figure for a standard 1600, especially with a piggyback ECU. I've seen a GZE make 350 ATW, but that was a big, laggy turbo and aftermarket forgies. I have no idea how long the engine would last under that kind of treatment, I guess it depends how good the tune is and how hard you thrash it...

RM.

**4agte** · 02-02-2006, 07:29 AM

standard injectors with stock regulator is supposed to be good for 150 rwkw a cheap upgrade is to 440cc black injectors from the 7mgte they cost about $150 for 4 and they will allow about 200rwkw

edit: is that hp figure at the wheels or flywheel?

**bathurst-91** · 02-02-2006, 09:11 AM

295bhp (220kw) on a stock gze at 19psi? Ok Im guessing you mean an engine dyno?

Eitherway a 4agze wont last long at 19psi. Im not saying its going to die next month but it will definately die sooner if your driving it hard regularly. Wind it down a bit if your concearned about engine life. Otherwise you'll be needing a rebuild within the year (or so)

4agte> it has to be flywheel. that figuire with a stock gze at 19psi isnt possible. (If he is talking atw then the only thing i can forsee is that its with 110octane and the dyno it ran on is on 'downhill' mode. ie its shit.)

But I mean... even then I cant see 220rwkw.

**4agte** · 02-02-2006, 09:38 AM

Originally Posted by bathurst-91

295bhp (220kw) on a stock gze at 19psi? Ok Im guessing you mean an engine dyno?

Eitherway a 4agze wont last long at 19psi. Im not saying its going to die next month but it will definately die sooner if your driving it hard regularly. Wind it down a bit if your concearned about engine life. Otherwise you'll be needing a rebuild within the year (or so)

4agte> it has to be flywheel. that figuire with a stock gze at 19psi isnt possible. (If he is talking atw then the only thing i can forsee is that its with 110octane and the dyno it ran on is on 'downhill' mode. ie its shit.)

But I mean... even then I cant see 220rwkw.

i figured it was an engine dyno but thats why i asked him to clarify

any engine when you put it under more strain power wise then flog the sh*t out of it will not last as long but hey who cares when it pops build it stronger

**YLD-16L** · 02-02-2006, 10:17 AM

Eitherway a 4agze wont last long at 19psi

My engine is bog stock ZE with a turbo, has been in the car for 6.5 years and has run 19psi for the past 3.5 years. No problems at all, it's my only car too so it goes everywhere

It also sees the track, drags, motorkhanas and general good times

Please keep the tech section to facts and peoples personal experience not hearsay and rumour

is it possible to boost higher? I am still using the stock piston and stock Injector.Thanks.

My brother ran his 4AGTE (OEM pistons, bottom end etc) on ~24psi with no problems for a short while. He did need to upgrade the valve springs (due to the level of boost causing valve float) and he was running 550cc injectors. I have run mine at 21psi but it's beyond the efficiency of the turbo and peak power is not much higher than at 18-19psi so it's not worth running any higher on my car.

An experienced tuner should be able to find the maximum boost/timing/rpm your engine will safely handle. Probably better to let them determine the limits and see what power you make with it rather than having some people on here hit you with numbers that may not be suitable for your particular engine setup. Detonation and excessive rpm are the main killers of an engine that is going to get hard time.

What sort of driving do you plan to do with your car mate?

**bathurst-91** · 02-02-2006, 07:50 PM

Originally Posted by YLD-16L

My engine is bog stock ZE with a turbo, has been in the car for 6.5 years and has run 19psi for the past 3.5 years. No problems at all, it's my only car too so it goes everywhere

It also sees the track, drags, motorkhanas and general good times

Please keep the tech section to facts and peoples personal experience not hearsay and rumour

What sort of driving do you plan to do with your car mate?

Rumor? I own a 4agte. My mate also does, and due to him driving it fairly hard on the street it has gone from 160rwkw and perfect to needing a total rebuild after a short period of time due to constant 20psi. Mine was run on 18psi for a year or so valve stems then became a problem so I've detuned to 13psi cut. And its happy to take a trashing at that and has for close to 2years.

I was once at a shop and saw what appeared to be a gze piston with the top missing and I enquired what happened to which the mechanic replied.. owner ran 22psi for a long time.

So yours has lasted, congrats. Im just trying to give this guy a heads up that in most instances running around the 20psi mark on these engines isnt a good thing for the longterm If you drive like a nutter.... Sorry I dont agree the stance that 20psi is a good thing for longevity....

Fun.. hell yes

Wise.. maybe not so much.

**SG-EE100** · 02-02-2006, 09:50 PM

Originally Posted by 4agte

standard injectors with stock regulator is supposed to be good for 150 rwkw a cheap upgrade is to 440cc black injectors from the 7mgte they cost about $150 for 4 and they will allow about 200rwkw

edit: is that hp figure at the wheels or flywheel?

The hp figure at the flywheel....

**pro-16t** · 02-02-2006, 09:56 PM

So if thats at the flywheel whats that roughly at the wheels?

**SG-EE100** · 02-02-2006, 10:04 PM

Originally Posted by bathurst-91

295bhp (220kw) on a stock gze at 19psi? Ok Im guessing you mean an engine dyno?

Eitherway a 4agze wont last long at 19psi. Im not saying its going to die next month but it will definately die sooner if your driving it hard regularly. Wind it down a bit if your concearned about engine life. Otherwise you'll be needing a rebuild within the year (or so)

4agte> it has to be flywheel. that figuire with a stock gze at 19psi isnt possible. (If he is talking atw then the only thing i can forsee is that its with 110octane and the dyno it ran on is on 'downhill' mode. ie its shit.)

But I mean... even then I cant see 220rwkw.

I actually drive my car like once a week. And i seldom whack the engine. My tuner told me that this engine is strong enough to take 1.3 bar. Is it? Got a friend who use a 7A engine with GZE piston, Vr4 450cc injectors, Microtec LT8 and a VF39 turbo.My tuner actually told him that he can only boost up to 1.0 bar cos the engine can't take it, and he can't rav high. Dyno results came out like 243bhp on flywheel. Seems like its a failure engine after he had spent so much money.

**SG-EE100** · 02-02-2006, 10:07 PM

Originally Posted by pro-16t

So if thats at the flywheel whats that roughly at the wheels?

Roughly around 250 on wheels

**SG-EE100** · 02-02-2006, 10:19 PM

Originally Posted by YLD-16L

My engine is bog stock ZE with a turbo, has been in the car for 6.5 years and has run 19psi for the past 3.5 years. No problems at all, it's my only car too so it goes everywhere

It also sees the track, drags, motorkhanas and general good times

Please keep the tech section to facts and peoples personal experience not hearsay and rumour

My brother ran his 4AGTE (OEM pistons, bottom end etc) on ~24psi with no problems for a short while. He did need to upgrade the valve springs (due to the level of boost causing valve float) and he was running 550cc injectors. I have run mine at 21psi but it's beyond the efficiency of the turbo and peak power is not much higher than at 18-19psi so it's not worth running any higher on my car.

An experienced tuner should be able to find the maximum boost/timing/rpm your engine will safely handle. Probably better to let them determine the limits and see what power you make with it rather than having some people on here hit you with numbers that may not be suitable for your particular engine setup. Detonation and excessive rpm are the main killers of an engine that is going to get hard time.

What sort of driving do you plan to do with your car mate?

Seldom drive my car though. Done all these just to win those bloody EGs civics. In Singapore, those EGs civics always look down on Toyota, and they says that a corolla can never win civics. So must teach them a lesson.

**bathurst-91** · 02-02-2006, 10:19 PM

Well if you want to guesstimate..

170-180rwkw? thats with a 15-20% guesstimation of drivetrain loss. Ofcourse thats being very general and drivetrain loss is speculative to each car.

The figuires sound ABOUT right. A friends stock gze + t28bb makes around 165rwkw. I believe from memory Singapore has a deacent rated fuel octane... 103ron?

**SG-EE100** · 02-02-2006, 10:27 PM

Originally Posted by bathurst-91

Well if you want to guesstimate..

170-180rwkw? thats with a 15-20% guesstimation of drivetrain loss. Ofcourse thats being very general and drivetrain loss is speculative to each car.

The figuires sound ABOUT right. A friends stock gze + t28bb makes around 165rwkw. I believe from memory Singapore has a deacent rated fuel octane... 103ron?

My engine is on fuel actane 98ron