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  • 3 months later...

Theread revival time. back on the dyno yesterday for some preliminary work and promptly spat out 450 hp at 13 lb.Serious time gets serious next week.

I think I'm gonna love the new turbo.

Time for some big power Noel! Keep us updated.

Theread revival time. back on the dyno yesterday for some preliminary work and promptly spat out 450 hp at 13 lb.Serious time gets serious next week.

I think I'm gonna love the new turbo.

Whats the setup again?

I can't remember... Perhaps I'm getting old? :rolleyes:

Time for some big power Noel! Keep us updated.

Absolutely not. The aim is for same power but more reliable at those power levels

Whats the setup again?

I can't remember... Perhaps I'm getting old? :rolleyes:

GT3788R, RB2530, Wolf V500, E85, Bosch Black 1600cc injectors etc etc.

Boost response on the 3788 is virtually identical to his 35R. The lines literally trace each other

Very interesting to hear about the GT3788Rs being that good, I had wondered (thinking the GT40 turbine was a bit overkill on the GT4088R for a "small" motor")... Look forward to hearing the final results, sounds promising!

Wonder why those turbos aren't more popular, they've been around a while now.

Very interesting to hear about the GT3788Rs being that good, I had wondered (thinking the GT40 turbine was a bit overkill on the GT4088R for a "small" motor")... Look forward to hearing the final results, sounds promising!

Wonder why those turbos aren't more popular, they've been around a while now.

They have been super popular. New turbo design. They are only about 1 year old technology now.....well, to retail

This thing sees 20psi before 4k - approx 3800-3900

Very interesting to hear about the GT3788Rs being that good, I had wondered (thinking the GT40 turbine was a bit overkill on the GT4088R for a "small" motor")... Look forward to hearing the final results, sounds promising!

Wonder why those turbos aren't more popular, they've been around a while now.

Not many results around would be the main thing.

Ive always looked at them as an alternate to a T04Z but too hard to find meaningfull results

Not many results around would be the main thing.

Ive always looked at them as an alternate to a T04Z but too hard to find meaningfull results

From what we heard before we put one on Gervase's 33GTR, the XR6 guys were replacing Z's with them and gaining about 100hp at the wheels and 400-500rpm better response

Gervase took off his 0.84 T04Z and put on the 0.89 GT3788 and gained about 400rpm response and made (I think) about 80hp at the wheels more on the same dyno.

This is the 4th one of these turbos I have fitted now, every single one is as responsive as a 35R or around the same but makes 150 odd HP more at the wheels depending on the application of course (mostly 25/30's or heavily modded 26's)

Is that including going from a single entry GT3582R to a twin scroll GT3788R? They've been around for quite a while, I think I gave up on looking for results for them over a year ago - so if there have been a bunch in the last year - that explains that. Looking forward to seeing the final tune results for this!

CAR: nissan stagea 260rs

engine: RB28

engine mods:

N1 block

full hks step 3 stroker kit (crank, rods pistons)

garret gtx4294r turbo

tial 60mm external gate with screamer pipe

hks gaskets

hks timing belt

hks cam gears

hks fuel rail

hks 1000cc injectors

hks oil pump

n1 water pump

trust sump kit

tomei 280 degree 11.5mm lift drag cams

tomei drag valve kit

tomei titanium retainers

tomei valve lifters

race cut valves

race valve guides

arp head and main stud kit

trust PEII 3" exhaust

koyo race radiator

100mm intercooler

2x walbro 255 fuel pumps

sard FPR

POWER:

have to change exhaust so power is "restriced" to:

580hp@18psi on BP98

710hp@23psi on 109 race fuel

Is that including going from a single entry GT3582R to a twin scroll GT3788R? They've been around for quite a while, I think I gave up on looking for results for them over a year ago - so if there have been a bunch in the last year - that explains that. Looking forward to seeing the final tune results for this!

Correct Lith, it is a twin scroll setup. I keep looking up sleeves for hidden cards but at this stage it is showing remarkedly similar boost characteristics to the 35r single entry. Its only running gate spring pressure at this stage but until the gate starts open on spring pressure the curve is identical.

Waiting on a wide band sensor to arrive and then we'll hook the boost control up and go to town on it.

Pretty happy budgie so far.

They have been super popular. New turbo design. They are only about 1 year old technology now.....well, to retail

This thing sees 20psi before 4k - approx 3800-3900

Interesting indeed.

On dyno/loaded/4th i take it?

Correct Lith, it is a twin scroll setup. I keep looking up sleeves for hidden cards but at this stage it is showing remarkedly similar boost characteristics to the 35r single entry. Its only running gate spring pressure at this stage but until the gate starts open on spring pressure the curve is identical.

Waiting on a wide band sensor to arrive and then we'll hook the boost control up and go to town on it.

Pretty happy budgie so far.

Any ETA on that? Surely it cant take long

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