WRX_Rich

iTrader: (5)

any one with much Experience with these turbos

It would be on a 2l with wrx heads ( MY02 ), just trying to find out how laggy it would be

Would only be running 1.3bar

cheers

The Fixer

There is better & cheaper alternatives, whats your power goals?

Conrad

p1mark

I have one on my P1, but i am at 1.5 bar.

I get 1.0 bar at about 3600 RPM.

Im on a RR in a couple of weeks. on the same day there is a couple of other P1's with identical specs (FMIC's etc) but running TD05/06-20G's at similiar boost.

Will be interesting, give this a bump after the 11th feb and should have some good info

PICKLE

Ooooooooohhhh!!

It might be a bitter pill though Mark!! LOL

p1mark

and on cue.......heres one of the lads with the 20G's or similiar

all the cars im talking about are mapped by Bob Rawle so i think it will be a reasonable comparrison.

If i had to hedge my bets now i think the garrett will give more BHP at the expense of a bit of lag.

PICKLE

Maybe!.......... Maybe not

WRX_Rich

iTrader: (5)

goals are a real 365\375 with room for more when the pistons \ bigend gives up will porbably get mapped on booster

could end up going uprated 2.5 later on so want this turbo to last

reason I am thinking this turbo is Ive spent to much on the car already through other companies and ending up replacing due to damage or bad choice of parts

RCM have been nothing but helpfull and I have started to trust them - I know they cost more but have been burnt choosing cheap options in the past

WRX_Rich

iTrader: (5)

cheers

are you on uprated internals or standard STI stuff, I could live with that amount of lag

p1mark

Im on a new age bottom end.

You are right about RCM. im local to them so it makes a lot of sense but they are top blokes with good advice. They dont sell crap stuff, they produce the best engines and best prepared cars around, And are always helpful. The downside is you pay for that kind of service.

I also find it quite amusing they dont have to tout themselves around the BBS's like all the other tuners do. They supply stuff to nearly all the other tuners as well. Go figure!

dazdavies

iTrader: (22)

Its about time someone compared these Turbo's. I too am a massive fan of the guys and the service at RCMS. I am looking for a new turbo and am Looking at RCM's GT35 hybrid but I'm looking at the P20 with ported shroud that they do for my UK classic MY99

I already have uprated crank , steel rods but I am using stock STI pistons and heads (my STI Version 5 engine came with forged pistons fortunately) . I also have the six speed box.
I have an Apexi ECU waiting to go on all I need now is the APS FMIC a decent clutch whichever turbo turns out to be best and 740 cc injectors.

Until then I am waiting to see which Turbo to go for the GT35 Garrett IHI hybrid or the TD05/06 -20G

So someone make my choice easier please !!!

Daz

p1mark

Watch this space Daz or if you fancy it the RR day is at G-force on 11th feb. there is no room for anymore cars but you will be welcome along to watch.

I think your weak point is still your pistons. I have subaru ''forged' ones in mine but i would not consider running a P20 at high boost without a fully built bottom end and aftermarket pistons. And running a P20 at low boost i would think would be very laggy. when all said and done its a 480-490bhp turbo.

Im just bulding a new steel/forged bottom end at the minute. im considering keeping the P18 and running it at 1.8 bar. This will give me 420bhp ish with pretty good spoil up i think.

Olly, Simon and especially Matt know there stuff though.....and wont BS you.

dazdavies

iTrader: (22)

Am Currently Running 1.5 bar through these and have done 16,000 hard miles since I rebuilt my own engine. Have a spare block and heads should the **** hit the fan. I'll try the turbo and see what happens. I'm not afraid to break it now that I'm not scared of fixing it lol

Davey P

iTrader: (1)

Until I come along with my little VF34 and whip you all

p1mark

wrc350bhp

wish i was going to be there to see it, then the bs should stop, good luck p1 mark

Bob Rawle

If it helps, my car with the first P20 Gt35 hybrid made 407 bhp and 350 ft lbs at 1.28 bar when I benchmarked it this week (low boost setting). Split the intercooler pipe on the 50% throttle run though (that made 432 bhp and 375 ft lbs) !!! Still got some decent info to work with over the next couple weeks. The 1.28 bar run is my low boost setting that is normally 1.5 bar (actuator pressure) but due to the leak only ran as indicated. 75% throttle was 459 bhp and 400 ft lbs, wot was 474 bhp and 410 ft lbs, all with the split pipe. Wot boost was 1.65 at peak power instead of 1.85.

Once thats sorted we should do a bit better.

Looking forward to being there on the 11th, will make a real change to be able to spend time enjoying whats going on instead of staring at a laptop.

cheers

bob

WRX_Rich

iTrader: (5)

well we will soon see how long a std wrx bottom end and gear box copes with the p18

cheers guys

going with 650 injectors - I probably keep the aps top mount... then again

p1mark

If you are keeping a top mount, get yourself a charge temp gauge. i had a STI8 top mount and could not get it to keep the temps under control and by all accounts the APS top mount is no better?

I have now put a FMIC on, and Bob will vouch for how much of a difference it has made in intake temps. i have no more noticeable lag with the FMIC than thhe TMIC.

WRX_Rich

iTrader: (5)

could one of you guys help me out

fitting the turbo - on the garrett the water pipes are in different locations I have the fitting kit which includes what looks like water pipes off a td05

which pipe goes to which side - I had a look a fuzz's web site but it looks like he used different water pipes

the kit also came with a blue samco but seems far to long ???

any ideas guys, I probably sort it tomorrow but light ran out on me today

Rich

p1mark

Thought i had a pic showing this but i cant find it.

Thhe banjo ends should be a different diameter to suit the bigger threads in the Turbo. IIRC the water pipe loops under the turbo and requires a bit of a jiggling to get it in.

Make sure you put the vacuum elbow in before you bolt the turbo on otherwise it wont fit, and make sure you use an oil banjo bolt with the bigger feed hole in.

The samco inlet pipe needs choping down, but it will still be very tight and will push up to the PS reservoir. proper fix is to relocate the tank.

WRX_Rich

iTrader: (5)

cheers

I have the correct banjo bolts etc


this is the kit I have

just trying to work out which water pipe went at which side on the turbo... I had the longer pipe going under the turbo like you say, just the shorter one seemed very tight on the actuator - think i might just bend away a bit

cheers

jbagh

At what rpm do you see 1 bar of boost on these turbos (P18 & P20)? (wundering on what turbo to go for next on the 04STI).

p1mark

see post #3 for P18 at 1.5 peak.

jbagh

oh sorry...

Interested to see the results..

Rollers

Also Interested in this turbo,when do you see 1.5bar mark(rpm)?

hi bob, was those results on 2l or 2.5l?

p1mark

Not looked TBH mate. this time next week car will have been dynoed though.

Bobs car is a 2L, runing high boost with a forged / steel bottom end. Mine is running on a STI8 spec-C bottom end.

Bob Rawle

Yup mine is 2 litre, sti7 semi closed deck box, sti wrc crank, arrow rods, omega's, 8.5:1 comp, 740's, vernier pulleys, k&n induction, exhaust, fuel pump, tubular headers, Motec M800 and all the goodies.

Just cleaned the air fillter and fitted new plugs ready for next week.

BTW anyone know why the rear overtakes the front when accellerating in a straight line, had that on the test run afterwards, scary to say the least. Had to oppo lock it to keep it out of the Armco !!

bob

Rollers

Talked to RCM on saturday about one of these turbos for my car,it's a fully built 2.0 .They said i should see full boost at 4600rpm,i currently see 1.5bar on my vf34/p20 at 3500rpm.I would really like to see some dyno graphs on these turbos,does anyone have the compressor/turbine maps?

Bob have you had any inlet/head work as i was told this might be necessary?

p1mark

LOl. i think 480+ bhp, and cold wintery roads may have something to do with it Bob!

Rollers, both Bobs and my own cars are on the same RR next sat. I have no probs putting my graphs up or sharing info.

Rollers

What were the results then bob and mark?
Where was the dyno?