harvey

iTrader: (48)

Can anyone identify the turbo below with an indication of when it might hit 1 bar, ultimate power output and boost pressure ?

silent running

Looks like an IHI VF-series turbo. Are there any markings at all on the front (compressor) side?

Welloilbeefhooked

iTrader: (3)

Harvey, I have one of these on my car at the moment. What I have been told (nasioc) is that it is based on a VF29. Mine had the badge, which I removed to see what was stamped underneath. There is nothing there, just a blank casting.

Zerosports have these made for them by IHI. The hotside is the p18 as standard and the compressor and cover are specified by Zersports. I was going to take it apart to see what compressor it has but never did.


I tried everything to find out what spec it is, but with no joy.

DH cars can't help, but have tried, and Zerosports in Japan just don't respond.

The guys on nasioc liken it to a PE1818 if that helps.

My car came with their kit: Turbo, venturi turbine support, SP data ECU. The ECU was set at 1.2 bar flat. I have no dyno figures though.

Wayne.

Welloilbeefhooked

iTrader: (3)

I do have a Power FC map that Andy did for me which may show the flow etc.

Forgot to say that I hit 1 bar at 3600 and full (1.4-1.45) at 4000-4100 according to my logs with my current spec (view my scooby)

Bob Rawle

If its a Zerosports jobby its basically almost a std VF ... not particularly good, car I am involved with had one of these fitted being told it would do 380-400 .... barel;y made it to 350, had it checked out and not really modded virtually a std spec VF. Not worth the bother imho much better out there.

cheers

bob

Welloilbeefhooked

iTrader: (3)

Bob, what were the differences though?


I always thought of mine as virtually standard as it on par with what others are getting from there VF28's


Wayne.

gti00eater

my turbo doesnt kick in until 5500 and revs past 9k only reved it past a few times it still pulls strong right up to 9k again dont know which 1 it is all i know is it says zero sports on it

gti00eater

can any 1 tell me y if i give it rice 1-2 it'l only boost to 1.2 but 3rd-4-5th boosts to 1.5 bar also wot is safe boost to run at its a 380bhp sti ra i have only got it so am trying to figure everything out cheers

jaytc2003

iTrader: (1)

You will never hit full boost in 1st and 2nd gear due to the speed in which you will go through them, however if your turbo "doesnt kick in" until 5500 revs and your car also revs to 9000 rpm then I would suggest there is something seriously wrong (or there will be) unless your rev counter gauge is totally wrong (by about 2.5k)

gti00eater

that doesnt sound good i thought i didnt kick in cos it was a bigger turbo my mate who had a sti sayd that it was twice the size of his turbo

harvey

iTrader: (48)

Thanks for all the feedback guys and particularly the actual experience and knowledge from Wayne and Bob.
The turbo will go on a P1 with a VF28 at present so we will get some good comparisons which I will be happy to share.
The turbo came off an 02 Jap Import already owned by the P1 owner.

9K RPM on a standard Scoob is asking for trouble.
Kicking in at 5,500rpm is very late. Even on laggy turbos/set ups, 1 bar at 4,000 rpm in 4th is less than desirable and if you have not got full boost by 4,500 or a little more, the car will be very unrewarding to drive unless you want to screw the back side off it for a short while...............................before it breaks.
Best have it checked out by someone who knows what they are doing.

gti00eater

cheers but its not standard i was told it was 380bhp+ standard they are 280 is this not something that you would expect with a mod'd car what would a real laggy turbo kick at?? what is it you meen by screw the back side of it? cheers

harvey

iTrader: (48)

The red line on STi engines is below 8,000 rpm.
The red line on most WRX is 7,000 rpm.

Valve gear as well as piston speed are limiting factors and it is nothing to do with whether the engine has 280 bhp or 380 bhp.
Only after VERY substantial investment can the RCMS engine rev well beyond 8,000 rpm.

What is the spec of your engine and where is the red line on your rev counter?

A coloquial term.
You could unscrew the set screws on the backside of the turbo compressor by an equal amount just to see what happens on these odd occassions you rev past 9,000rpm.

gti00eater

thanks how could i set a rev limiter to 8k then as i obiously dont wana reck or is this something i would need to leave in to do??

Ian

iTrader: (10)

get your self a shift light, and set it to a lower rev, so you know when to change up. hitting the limiter is never a good idea really

silent running

Revving to 9000, sure that's not a bike you've got there?

harvey

iTrader: (48)

I might be wrong but did these cars not leave the factory with rev limits in the ECU anyway?

Welloilbeefhooked

iTrader: (3)

Harvey,

Any news on the fitment and use of this turbo? The reason I ask is that I'm curious about the spool as I think I may be able to improve my map.

Also, just wondering what size the up-pipe is that you will be using. Mine is a 50mm ID and I think it may be a little bit to big.

Wayne.

harvey

iTrader: (48)

50mm is certainly too big for this size of turbo/VF28 slight upgrade.
I will know more when I get some actual figures from it on the road on Saturday. So far the impression is torquier and nicer to drive but probably not much more ultimate power so this would not be an obvious upgrade but lets see what is learned at the week end.

Welloilbeefhooked

iTrader: (3)

Harvey,

Thanks for the reply. Looking forward to the results.

Wayne.

Welloilbeefhooked

iTrader: (3)

Harvey,

Did you manage to get any results for this turbo?

harvey

iTrader: (48)

Yes. Spool was the same as the VF 28 but it hits full boost harder. The car has not been on a rolling road so I cannot give you a meaningful figure but it had more go than the VF28 so that was a pleasant surprise.
Boost has now been turned up slightly, which had not been done with the VF28 so whatever final results we get will not be particularly meaningful.
During next week I will get you the rpm for 1 bar in 4th on the P1 but remember this car may have different gearing to other cars with a VF28.

Welloilbeefhooked

iTrader: (3)

Totally forgot about this, any news on the performance?

Welloilbeefhooked

iTrader: (3)

Harvey,

Got my turbo off the car at the moment and have noticed that the compressor housing inlet looks to have been machined to accept a larger compressor wheel. Ive seen a few VF28's close up and the internal diameter of those look to be alot smaller that the one fitted to my car. Also, the blades on mine seem to be doubled up if that makes sense. 6 Blades with another 6 just behind.

If they go to this trouble, why dont they do something with the outlet of the housing to smooth the flow?

Anyway, just thought I would add to this info.

Wayne.