Mr. Furley

iTrader: (1)

Subscribe.

EvoDan2004

iTrader: (94)

to what? my apple sauce addiction or the topic we was talking about 4 pages ago??? haha

Mr. Furley

iTrader: (1)

I'm on the Apple Sauce too.

EvoDan2004

iTrader: (94)

the **** rules man. no lie. i would not lie.

but to be on tipic. not much has gone on with my car and the 35r testing. i need a anti surge cover. then i can move on.

EVOlution561

iTrader: (13)

that is pretty good spool up.

HaVoC RR

iTrader: (44)

just give me that turbo

EvoDan2004

iTrader: (94)

express or ground??

Monkeysphere

iTrader: (1)

Couple quick ones. I actually have a HKS3037S with a .73 rear waiting to go on. Expecting my spool to be around the 3900 mark but i am looking into this setup for its earlier spool and larger A/R.

Around what RPM is your power tapering off again because the turbo has no more flow in it?

Looks pretty tight against that radiator, i already have a 53mm Koyo in my car. Is there enough room?

Geoff Raicer

iTrader: (7)

the HKS turbo you have is a good center section, but has an extremely restrictive T25 internally wastegated turbine housing. This turbo is designed to be used on t25 flanged manifolds for the SR20DET or rb26dett and it really doesnt work very well at elevated boost and rpm, it just bolts up to a t25 manifold. I think a properly machined twinscroll turbine housing would be a direct bolt-on to that turbo and allow for solid gains. The HKS compressor housing is VERY good tho and you have the good 60mm turbine wheel. We've run this t25 internally gated 3037 turbo on SR20DET and K series honda applications, and have had poor results with both

the reason evodan's power drops off, is not due to the turbo not having more flow in it. The engine was simply unable to breathe more (inhale and exhale). if dan wanted to make more power he could have either increased displacement, used a larger intake manifold, headwork, bigger cams, larger turbine housing or played with cam gears... or a combination of all. there is a LOT of room to go with these setups

i havent personally test fit the 53mm koyo, but i know a 44mm PWR fits with room to spare. Hard to guesstimate, but i believe the koyo would fit fine. worst case scenario trim the upper rad support slightly and tilt the rad forwards.

i hope this helps

Mr. Furley

iTrader: (1)

What difference would doing the FP HTA mod to your TS30 or TS35 do?

discopotato03

Hi Geoff , hate to counter you but every HKS 0.73 A/R turbine housing I've seen was actually a propper GT30 housing but with the T25/28 mount flange cast into it . Also they've all been external gate type only .
I have only ever seen GT28 IW turbine housings in 0.64 A/R (Garrett and HKS) and 0.86 A/R (Garrett only) .

As for the compressor housings the 3037's have two kinds , both T04E 0.60 A/R with either the std ~ 2.75" inlet boss or the larger port shrouded type with the bell mouthed insert . The "straight" GT3037 gets the standard inlet , the GT3037S and GT3037 Pro S types get the port shrouded comp covers though the Pro S housing is the rough cast one common to the GT2835 Pro S too .

One thing to note is that the 3037's with the ported shroud have a slightly different designation cast into them than the Garrett marketed GT3076R . One has "KTT1" on the front of the volute where the other has "BSK1" . I have never seen a 3037 with the comp cover removed to look inside it . I would not be surprised to find that its diffuser section is different ie larger diametre along the lines of the HKS T04Z's compressor housing . This is purely speculation but I think there's more to the HKS variants improved spool/transients over the GT3076R .
If Jays about can you shine a light on this please .

Gotta run , cheers A .

Monkeysphere

iTrader: (1)

Thanks for the info guys. My 3037 is the S type which is an external gate. The Pro S is the internal gate. Mine also has the 4" shrouded inlet.

How much would i be looking at to change the rear housing on the 3037? I got the 3037 considerably cheaper then retail so selling it just getting a twin scroll 3076 was sort of my plan because as far as i know the internals on the 3076 and the 3037 are exactly the same. From the above post though am i right to think the internals on the compressor side of the 3037 are slightly modified from the standard 3076? Would i maybe be better off putting a twin scroll hotside on the 3037 and using the modified insides rather then going a 3076.

Also im not 100% clear on how the twin scroll setups work, is it just the housing or is there something in the turbine wheel that changes?

discopotato03

There used to be an article in the Nissan Performance Magazine (e-zine thing ?) called Project SE/R part IV The Turbo . At Rob Caddles recommendation they used a GT3037 in 52 comp trim and with the T28 flanged 0.73 A/R turbine housing on a long merged collector ext gate tubular manifold .
Its a pity that site doesn't exist any more because they had pics of this turbine housing extrude honed and Swain Coated .

Cheers A .

discopotato03

Firstly you need to look at the turbos ID tag which is on the side of its iron bearing housing (centre section) . Sometimes these Garrett cartridges have the complete turbo assembly number stamped on them and other times they have the cartridge number .

All GT30 turbine BB based cartridges have a common 700177 number followed by a dash (-) number to tell the compressor type .
For the full sized or ~ 60mm turbine equipt 3037's there were 3 GT compressor trims available ie 48T/52T/56T . The 48T version I've never confirmed but the 52 and 56T versions cartrige numbers are 700177-6 and 700177-7 .
Not at home ATM and have to confirm but I think the 52T HKS version is turbo numbers 700382-10 or -11 and the 56T version sold by HKS and Garrett is 700382-12 . If all else fails carefully measure the inlet snout which should be ~ 57mm (56T) or 55mm (52T) . The elusive 48T version is supposed to measure ~ 52.7mm .

I spoke with JayCav about this before , if I was buying a 3037 I'd opt for the 52T version because I think it would be a bit more responsive without giving much away at the top end . My preference would be to have more punchy mid range than extreme top end because thats what feels fast .

Ultimately I want to see Garrett use their newer C117 compressor on these and 3582R turbos .

Cheers A .

SickSilverNLow

iTrader: (5)

nice.