a couple of turbo Q's

[caney]

what dyno gave you the 372bhp steve??
A gt3071r will do 450bhp,a gt3076r will do 500bhp with associated mods.

Thorney motorsport dyno dynamics one mate,it does feel like i've got more than 370bhp tbh.As a comparison,with the vf34/20gi could do 13.2 1/4's and with the tdo5/20g i can do 12.8 1/4's so there is quite a difference between the 2?Both times with no nos btw,also my terminals have gone from 110mph to 116mph!

 

[ryan_s3]

Dyno Dynamics is the only one i trust,v.accurate.Are you running a tubular manifold now? Garratt gt is the way to go for you now.

 

[caney]

Dyno Dynamics is the only one i trust,v.accurate.Are you running a tubular manifold now? Garratt gt is the way to go for you now.

yeah tubular mani now Ryan,i think i might go for some sort of hybrid turbo next year but not sure if i wanna keep chucking money at the tt anymore

 

[ryan_s3]

why not go for a decent gt or will it not fit?

 

[caney]

why not go for a decent gt or will it not fit?

as you know a mitsi tdo5 turbo is flanged differently to a garrett turbo,the one that bills got could be the answer.

 

[tashacupra]

so it's basically a fast spool vf34, the subaru boys say it can hit full boost by 2400rmp is that wishfull thinking on our engine (1.8t)?

sorry forgot the quote bit lol. in relation to vf38 i'm on about.

 

[ibizacupra]

as you know a mitsi tdo5 turbo is flanged differently to a garrett turbo,the one that bills got could be the answer.

Fp green or fp red options... red is laggier but more power.
aka SuperZilla and other peoples stage 3 IHI type turbo
Owens one is also an option on that flange

 

[ryan_s3]

red it is mr caney,i'm sure bill will have one spare now.
Forgot about the flange issues i'm running a tubular manifold on the evo but i can get a twin scroll gt 30r so no worries.

 

[h17och]

didnt want to start another thread for this but what size injectors will i need for gt3071r?
400-450bhp region?

jbs said 550cc but sounds too small to me

another contact said 870cc which was said to be work out for a proper injector calculator type thing !?

any advice please

 

[minimivic]

I'm thinking Genesis 550cc at 4 bar and hope they dont max out. I think 630cc maybe better but have heard of lumpy idle problems.

 

[Ibiza sport man]

I've done about 6 cars with 630's at 3 bar. They run about 75 % duration at 340 BHP. So for a true 450 BHP 550's are going to be too small. They do run a touch rich at idle though, if you try to reduce the pulse any more they won't open. But the idle is smooth, but not emissions friendly.

Bernard

 

[minimivic]

Interesting, I had a long email talk to USRT in the states and they say 550's would suit best

 

[minimivic]

Quote from Scott@USRT
"Okay, what I would for 350whp is use is the Genesis 550cc at 4bar fuel pressure. A high-flow fuel rail is a great idea, too. The Walbro inline pump is up to the task and should work very well. The Bosch 044 unit is quieter and will do the job with even greater ease. I don’t think that water/alcohol injection or race gas will be required to put you where you need to be. However, with the WAI you will drop your intake temps down significantly (40 – 60degF). You’ll also increase your torque by a very healthy margin. So, it isn’t a bad idea in the slightest. If you’d like more implementation details on WAI just ask."

 

[ibizacupra]

my 620cc injectors were max'd (running 4bar) beyond 485bhp

changed to 750cc genesis injectors (3bar) now running 4bar on the FP Red.

Probably going to change for another 4 injectors when on DTA, so I keep control from the main 4 as is, but get more fueling when I need it from the extra 4 switching in.

Tims ibiza running GT30R runs 1000cc injectors and has reported using 80+% duty cycle on his motec

 

[Jon@VAGWORX]

550's is pretty much the cut off point for high impedance injectors in this fitment, which give a perfect idle.
Baisically from there on you will start to have troubles with idle, even on perfect mapping, you just can't map the duty down low enough.

Having said that, 630's aren't too much of a problem, you can usually up the revs a few 100rpm and have a tiny bit of overfuel.
750 genisis are about the same, due to it being a better injector design.
Then, from then on the higher you get the worse it getts low down.

Unless you run low's

Trust me, you won't get over 400hp from 550's without running silly pressures, or better fuel.

 

[ibizacupra]

550's is pretty much the cut off point for high impedance injectors in this fitment, which give a perfect idle.
Baisically from there on you will start to have troubles with idle, even on perfect mapping, you just can't map the duty down low enough.

Having said that, 630's aren't too much of a problem, you can usually up the revs a few 100rpm and have a tiny bit of overfuel.
750 genisis are about the same, due to it being a better injector design.
Then, from then on the higher you get the worse it getts low down.

Unless you run low's

Trust me, you won't get over 400hp from 550's without running silly pressures, or better fuel.

750cc genesis running 4bar reggy on mine idles fine. lambda sits at 1.00 ok
I may opt for a.n.other set of 4 Geneis 750's and drop back to 3bar fuel pressure. (or not... )

 

[ryan_s3]

people run 560cc injectors over 400bhp all the time in the evo world.

 

[h17och]

i will find the email i was sent

 

[h17och]

here you go...

Ideally, in order to achieve say 400 wheel hp, and to support it without taking the injectors over 80%, you will need 830 cc's of injector to be safe. A set of 870 cc units are available for $435 for the set which will give you some buffer.

 

[ryan_s3]

whp is less than fwhp,400whp=460fwhp (2wd)
560cc upto 440bhp max