Compressor-turbine Matching

[180bfj20det]

One thing I should have mentioned last time is that the ATP housing is .63 a/r as in GT30 turbine .63 a/r

Cheers  A .

<{POST_SNAPBACK}>

Hang on, are you saying that if I buy a GT28rs from ATP with the 0.63 AR ex housing, that it will be a 0.63 AR housing calculated on the size of the GT30 60mm turbine and not the 53mm turbine from the GT28rs?

If so, unless I got it wrong, that still works out to smaller AR than the garrett 0.86.....

If I were to go for the flattest, largest in magnitude and earliest torque curve (yes the combination of the three ), I will benefit from using this 0.63 housing as you say...(pending explanation) but could I benefit from blocking of the gate and runnung my Tial 46mm gate to ensure the least back pressure in the housing too?

Last of all, you talk about reversion which is very impt, could I benefit from a split pulse manifold and housing?

Summary:

GT28rs with ATP 0.63

TiAl gate 46mm

Split pulse equal length 1 1/4 inch manifold

Split pulse housing

Heeps of torque really early and 330rwhp?

Add more to the equation of need be please...

Last question of all, since this thread is about matching turbine to compressors...why do you not recommend the 52 and 56 trims and only the 48t in the gt2871r???

Also, why just the 0.86 housing?

There are a few on nissansivlia who make 320-340rwhp at low boost (ie 15psi) on srs using the 56t gt2871r with 0.63 housing.....take this into consideration when asnwering cause from evertying I have ever read from you (which i appreciate), it contradicts what you have said and im confused as hell now

Thanks a lot

Boosted Frog

Edited February 3, 2006 by 180bfj20det

[fantasy]

Disco,

Forgot to mention the HKS GT3040R-50T I have here has a T25 foot print.

The few customers I have that have GT28RS or similar already had them on there cars before they came to me. Most of my business is done with people that are chasing higher power out puts than the GT28RS can deliver on sensible boost.

The most impressive car I have seen with a GT28RS is a customers S14 200SX making very close to 300rwhp on a good day @ 6000rpm on 20psi and tons of torque from 3000rpm. Max rpm is 6200. No worth while power past this point. This 200SX has backed this power up by doing several 112mph - 113mph passes at WillowBank.

Most of my customers want more than 300rwhp and don't want to run more than 18psi. So even know the GT28RS is an absolutely awesome turbo it does not suit the majority of my customer basis.

Cheers,

[fantasy]

The test car I built my new SR20 turbo kit on is now finished. It uses the Billet Turbo combo I mentioned earlier using the 56T 71mm GT compressor wheel.

This car made 245rwhp on 10psi and 311rwhp on 16psi.

This means for me the turbo kit and the turbo combo is a success story.

[nuffin_werks]

can anyone tell me the specs on this turbo part no: 714569-5002

like is it the gt30/40 ?

[discopotato03]

Need the cartridge no (CHRA) . 700177-0014 is 56T GT3040R pt no .

No time ATM , back tonight .

Cheers A .

[fantasy]

can anyone tell me the specs on this turbo part no: 714569-5002

like is it the gt30/40 ?

<{POST_SNAPBACK}>

The closest match I have to your part number is 714569-0002.

This turbo is a 52 trim T04S version of the GT30R's.

If it is this turbo it will have a .70 compressor cover,

7 bladed 52 trim T04S compressor wheel with an inducer size of 55.1mm and a major diameter of 76mm.

It will have a .82 rear housing (if it hasn’t been changed) and the standard 84 trim 60mm GT30R turbine.

Disco may have an exact match to your part number if this is not your turbo.

The easiest way to check would be to count the compressor blades and measure the compressor inducer size, then cross reference it with the information supplied.

Cheers

[discopotato03]

Yep thats the one , Turbo number 714569-0002 = cartridge no 700177-0018 =

GT30/TO4S 52T and being -0002 should have .82 a/r turbine housing if unaltered .

-0001 = 1.06 and -0003 = .63 a/r .

Cheers A .

Edit : I may be wrong here , have conflicting information as to which of these two has the 7/14 blade 82mm compressor . Could be either 700177-13 or 700177-0018 though the -18 is more likely .

Need to remove the compressor cover and measure the major diametre and count the blades . The smaller front or inducer diametre would be good so we can work out the approximate trim no .

Cheers A .

Edited February 4, 2006 by discopotato03