turbotrev

The gtx-r range has been out a while now though ain't they?
Some years at least I thought?

Cheers Paul

Mark Shead

I saw there was a update at sema this year from garret but didn't interest me as it's a tweak

Mark

turbotrev

If you took say a 7064 and a 9180, what exh housing do they come with as standard?

Or is it a choice when ordering the turbo? What housings are used on the yb for 500hp and 700hp respectively?

Cheers Paul

Caddyshack

The 7064 is the designation of the trim, I think....................... so you get the standard spec, you buy the 7064 if your limit is about 530bhp and 9180 if you want to go for 700 / 800 bhp

The next one up from my 7064 fits the same housing and will allow for 580bhp if I go for the 2.2 Ally block...this is Marks estimate and he is normally right on the money.

moondustka

You don't like Garrett then...

Ever experienced a Borg Warner get core failure? Or you think they're reliable enough? Nice units, don't get me wrong.

scoooby slayer

iTrader: (4)

My 1992 r32 gtr lost 30 hp per axle, r33 gtr just the same, 18 % is a load of pub talk nonsense imo

moondustka

Still car dependent

Rolling roads give a calculated and estimated flywheel figure. They are measuring from a rubber balloon on a wheel. I think it's been said already and in my opinion, hub dynos are a more accurate way of measuring power. After all, it's hard bolted.

scoooby slayer

iTrader: (4)

R33 gtr 1995 rb26 engine, gained over 100 hp from housing alone, i could tell from driving it that it was restricted and it was massivly

Similar plot to yours may have been in a little earlier, 1.6 bar boost 710 hp 8500 rpm it was a beast just needed lots of revs


Had screamer on aswell sounded awesome, I did manage a high 3s 0-60 but it was very hard on the car to do it lol

scoooby slayer

iTrader: (4)

Hub to crank estimation I don't believe any car will be 18%, nowhere near, tyre to crank is totally different

Mark Shead

I have used more efr than anyone in the uk and only every seen two go wrong the very first Pre production unit and one on a race car that had three inlet manifold failures so for me they have been way better than any other turbo for reliability.
Forgot about exhaust wheel failure on 9180 that we where deliberately over speeding and knowit could happen but 1000hp was sooo close lol.

Mark

turbotrev

Ain't 7064 and 9180 the compressor and exhaust wheel diameter sizes in mm?

What I mean is they come with different exh housing options so for example would 500hp yb on a 7064 be on a .82 exh housing and say a 700hp yb like Mark Hudds be on something like a 1.05 housing?

Cheers Paul

turbotrev

What was the lag difference when changing up to the bigger exh housing out of interest?

Cheers Paul

scoooby slayer

iTrader: (4)

Not alot mate I have dyno plots but poxy photo bucket won't work, il try add on PC tonight when I'm in office

Mark Shead

No they are diff frame turbos. 7064 good for 530 hp and 9180 950hp.

Mark

Mark Shead

Photobucket is dire. Anyone know of a better host for Picts.

Mark

Caddyshack

Its easier just to upload from PC to the computer using the little yellow box above
That one<br/>

Mark Shead

What yellow box to where.
Ok now see.

Mark

gjh

When you go to post a reply, look at all the boxes on top of the text box, there's one that if you hover over it says Insert image, click on that and it will let you link an image directly from your computer so you don't have to go through the likes of photobucket.

turbotrev

On what size exhaust housings though?

Cheers Paul

turbotrev

I know they are different frames btw

Cheers Paul

Mark Shead

Don't get to hung up on housing size as twin scroll changes the numbers as you have a divider in there.
Go with what suits your manifold if selecting your turbo.

Mark

scoooby slayer

iTrader: (4)

My gt40 was divided on divided manifold and it made a huge difference, I'm not saying Trev's will I don't know but it did on my rb26 mate a huge difference transformed the car

Mark Shead

I already know the diff a twin scroll manifold makes lol. But there are many that have no idea or clue at the diff and that includes the tuners that should know better lol.

Mark

turbotrev

So basically a true twin scroll setup?

Cheers Paul

Mark Shead

Has any of the info in this thread helped you with the direction you want to go.

Mark

scoooby slayer

iTrader: (4)

I didn't mean in reference to difference between twin scroll and open scroll mate, I ment housing size going bigger made a huge difference to my rb26 on the gt40, I remember we spoke about it at the time it really bought the motor to life

Mark Shead

From mem didn't you have a tiny housing and I recommend a 1.06 which did the trick.

Mark

scoooby slayer

iTrader: (4)

Yes mate was specced with 0.85, I wanted to change to 1.06 and tuner said it wouldn't make any difference worthy of the change, I spoke to you and you confirmed my feelings it was to small, I swapped it out and it made over 100hp more at same boost with very little extended boost threshold

Not many trustable knowledgeable tuners out there like you mark

scoooby slayer

iTrader: (4)

Mine wasn't it was divided turbo gt40, divided hks I think manifold just divided between 3 and 4, I don't think the screamer was divided though, the only point I was trying to make is IF your turbine housing is to small it will make a huge difference to power, I've not had a gt30 on a yb so I don't know where the limits are for yours, il add pics in abit if I can

Jay,

iTrader: (4)

This is it people mistake divided for twin scroll

scoooby slayer

iTrader: (4)

here you go trev
rb26, worked head, stage 2 cams, gt40 o.85 ar






I wasn't happy it was making the numbers it should and it wasn't as fast as I expected it to be it felt like 600 hp because that's all it was


so when mark confirmed theres a good chance it will help, I went straight to a 1.06ar, I did drive it after fitting housing could instantly feel the difference and was way lean as soon as I got on boost on my wideband, so I got it mapped of hub dyno at same boost









dyno showed over 100 hp extra, and that was confirmed with my 30-130 mph times, and 1/4 mile mph went from iirc 123 mph upto 129 mph


and I only lost 300 rpm, it just felt so much better, the only difference I noticed was harder making boost of the line, once in gear moving it was much better, I was in the middle of sorting some boost build launch control on hks gear but then I had diff and 4wd issues and bought the r35 so the r33 got broke up for parts.

cossynut2

Same for me Jay, I went to stage 3 as soon as I got mine 21 years ago and more again 2 years ago and I have never driven or been in a standard one but have been told it would feel pretty gutless.

Jay,

iTrader: (4)

Love these threads PF at its best

Jay,

iTrader: (4)

They are but I drove my first 2wd 28 years ago as a stage 1 and thought I was going to the moon then 25 years ago my 304r was 330 bhp and then thought I was going to die now drive one that power a fear dying of boredom

R4N SS

iTrader: (6)

i have been in a completely standard 3dr and it was fucking shit slow

Mark Shead

Dave moss Yb 2.15lt on a gt4088


Mark

scoooby slayer

iTrader: (4)

A dynapak or dyno dynamics dyno will be lazier than that won't it mark as it's under less load compared to engine dyno ?

Mark Shead

Yes unless you run a sweep test on the engine dyno.

Mark

3doorcozmess

didn't realise daves what that much of a beast.

correct me if I'm wrong but is that making more power and more Tq than DP escort? on a turbo that's ment to be more laggy?

si

Mark Shead

Your comparing a dd rr to a super flow dyno so diff to compare and Dave's never ran at max power in the car and also is one on my full house stroker engines which will be a better engine for that turbo than the dp car.

Mark