R32 Gtr And Small Single Turbo (sst) Upgrade

[Roy]

Maybe i see the whole save the labour cost for other things....but then again im not as rich as others, so thats how i work. Plus im always keen for the experience, it can only help.

I hear ya ! I do as much spanner work as possible on my car...in the long run im pretty sure im saving money. But i have made a few mistakes, and the older i get it seems the less time i have to do things on my car.

[Duncan]

Didnt Fatz have a GT35 on his RB26 in the R31 or was it an RB30?

Yeah it was an rb26 and it was too big/laggy

[jarkowy]

I try to make my GTR on turbonetics 62-1 stg V .63 - T3 hot side. http://www.turboneticsinc.com/turbomatrix.htm

I try to calculate it and study compresor map and I think it well be fit witch small lag. I hope it well be like gt3240 garett.

In Poland it cost me

turbo 1000$ US dol

mainflod 300$

wg 100$

downpipe and all pipe work 200$ by my self

For me it is a cheapest option (I broke my std turbo)

I have Blitz sus power intake stock AFM, exhaust 88mm, walbro fuel pump, fuel pressure and I make chip by my self.

If I well have 450hp+ at flywell and quick response i would be happy.

Do you think it is possible (maybe I buy turbine on monday if you agre witch my project)

Second reason is that car must be lefthand drive and it well be easier to do it witch single downpipe.

I make the conversion RHD->LHD for R33 - www.skyracing.pl

[Beer Baron]

i dont know much about turbonetics turbos, they are not as popular here as they are in the USA (and Europe).

But it sounds like you have it all figured out. Please let us know how it turns out.

[Faid]

Hey beer baron, i worked on a R33 S2 adn we put in a RB26, because he wanted GTR status but in RWD mode. While doing that i told him that the chance of one of the ceramic wheels from the turbs could die on him and f**k the engine up. so we bought a turbonetics T3/T4 turbo, it had a BB core etc, i was quite sruprised what we could acieve with it. the mods on that car are, cam gears, nismo 550cc injectors, PFC, Z32 AFM's, Pods, nismo fuel punp etc but we made 400-420HP on a relative safe tune. the manifold he constructed himself. but the turbonetics is on full song at about 2900-3000, so better than stock response, and i dont think it robs the car of top end because when we stuck the Gtech in it showed consistant accelaration.

[Steve]

if people claim a big single is better for big power than big twins (not saying they are right), then by that logic wouldn't a smaller single be better for moderate power than low mount twins?

doesnt keir wilson's gtr run twin trust turbos? one of the quickest (if not the quickest?) gtrs on street tyres in the world

I was always under the impression BFOT was purely for economical reasons? - 1 big turbo is cheaper than two medium turbos that need 2 new dumps, inlets blah, blah, blah

The physics of twin turbo v's single turbo, for the same flow, twins should spool up quicker (less rotational mass) - this is what I have been led to beleive...

can someone shed light on this?

[Adriano]

Im under the impression that one turbo should be more efficient than two at the end of the day, as one 500hp turbo will not be twice as big internally as two 250hp turbo's. we did a gtr with everything standard except the hot side with a gt35R .63ex, made an easy 309rwkw at 16 psi, and comes on earlier than the stock setup, with cam timing and 19psi, 350rwkw should be in reach.

[Faid]

On th physics of the twin setup, there will be les rotational mass for sure, but lets say the flow measuered at the intake pipe is about 100 cfm, than the flow of each turbo given they both have the same shaft speed should be 50 cfm. they can spool earlier because of the smaal rotational mass, but youd also have to consider that they have half the exhaust flow available, for a response setup id use twins, but for outright top end HP id still use a big single to retain some response. its what your after.

[T04GTR]

a while back i was reading a zoom mag. it had a gtr with a 3037 on it. it made full bost at 3500 (big ex housing) and made around 320 rwkw with the wick turned up.

[T04GTR]

single for the win. one you go single you cant go back.

ive driven a few rb26,s most with twins. 2530's gtss,34n1 all were pretty good. but they felt quite lasy and were slow to boost.

ie.. they start building boost quite low but dont reach the target boost till quite late. the norm with those was 1 bar at around 4500 in a meadium loaded gear.

thats the same as my t04z. with less power from the twins.

i persomaly prefer the single. maintance is easier and it looks tough. but you kinda loose the rb26 howl at hi revs. but thts ok the external gate makes up for it

[Roy]

So no dyno sheets of RB26s using GT30R, 3540 etc etc. TO4Z is bigger then 3540 right?

[NXTIME]

Yes: 2835, GT30R (GARRETT), 3037, 3040, 3240, 3540, T04R, T04Z, T51R

[BaysideBlue]

So, it's been a long time, has anyone had this done yet (sst on a gtr)?

[Gts-t]

I plan to put a GT3040 on a rb26/30, wont be done for awhile tho

stupid mortgage

[BaysideBlue]

GT3040 on a rb26/30

Thats a sweet combo! Lots of early boost Keep us posted.

[Beer Baron]

well I wimped out and now have:

HKS GT-SS

tomei expreme manifolds

tomei expreme dump pipes

HKS stainless front pipes (twin 76mm into single 90mm)

twin nismo AFMs

all going onto an R34 Nur N1 motor (built by prime garage with head work, cams, oil control mods, metal head gasket etc).

will also put in the full Greddy piping kit, and a new ARC intercooler.

BUT

seeing this thread again has got me longing for a SST or MST... now that my engine is pretty decently sorted I could probably even cope with a SBST (semi big single turbo). or the daddy BST/BFOT. perhaps a T04Z would be good for it? I really only want something between 320 and 350rwkw.

So I pretty much want a turbo running at it's peak at this power. No point getting a T04Z and making this power at a pissy 14psi.

so the question is:

what turbo, running at say 18-22psi will deliver me between 320 and 350rwkw with lots of torque? is T04Z too big in any of the available HKS housing configurations? I also have 4.375:1 diff gears F+R so that will help make the car feel very responsive.

[Gts-t]

Hey bb

that sounds like a sweet setup, i think u should keep going ahead with it and see what its like to drive before swapping over to whatever sized single.

Im not sure what turbo would be best for you but im looking for 300rwkw and hoping the GT3040 can pull it on 1bar on a 26/30 with about 8.3 cr

If i had the money id love to go a set of tomei cams and cp pistons(9.0 cr), spool rods, tomei oil pump, ati/ross balancer(7500rpm maybe )

Since i dont pay for labour i think ill go the stock rebuild of the rb30 with stock gtr cams, and oil pump and 7000rpm rev limit, and move onto the above line later...

Edited November 6, 2007 by 2630GTS

[Beer Baron]

yeah well my total engine parts list so far is (and 90% already bought):'

R34 Nur N1 crate motor

prime garage built head

tomei metal head gasket

oil restrictor

tomei valve springs

tomei cams 260/9.15

tomei sump baffles

GTS4 diff gears

sard 700cc injectors

sard fuel rail

sard fuel reg

nismo fuel pump

nismo engine mounts

nismo air flow meters

HKS GTSS turbos

tomei manifolds

tomei dumps

HKS front pipes

trust hard pipe kit

apexi power intake kit (thinking of swapping for the FULL trust suction kit)

of course lots of other bits like oil cooler, PFC, EBC already in use. But I could flog most of that suff and get a small T04Z or even a 3037 and get similar power. on the other hand the above set-up is what I thought would be best for track, and my head tells me that's probably the case. but my heart says GO SINGLE! tough choice.

[Gts-t]

Very nice list BB!

Im planning on a single for these reasons in no particular order

1. Its going in a gtst with a gtst pfc therefore 1afm, 02 sensor etc already in place (more messing around for TT)

2. I think a turbo with external gate on a high quality exhaust manifold is technically less compromised that a twin system in the space available in the engine bay.

3. I just want a high mount.

4. Im pretty happy with the 215ish rwkw i have now from my rb20 and the response of the HKS2530 with it being nicely sized and all. I guess im just trying to emulate that as well with the 26/30 looking for 300ish rwkw or same as the rb20, about 100rwkw/per 1000cc's

I do like the idea of twins and an airbox so i can make it look stock but that kinda went out the window awhile ago

Edited November 6, 2007 by 2630GTS

[drag-on silvia]

so was doin a bit of thread mining today and come back across this thread and wondered if anyone had finally put a gt3037 on a gtr in single form? was thinkin with the new gtx series available in a 3037/3076 it would be a good choice for a single to make 300-350kw. makes me wanna buy a gtr just so i can do it and see if its as mad as i think it would be. think gtx3076 with a .82 tial housing high mounted on a 6boost manifold with a 50mm gate.

Edited May 6, 2011 by drag-on silvia