Dyno Comparo - Various Twins Rb26

[R31Nismoid]

How come the one with -9s has boost control issues?

I'm curious on how -9s with boost control issue fixed would stack up compare to -7s in terms of response.

Don't know. Mate of mine said mine was quite a bit more responsive than his, given our turbos are similar, we now know why.

No doubt he'll get it fixed eventually. Could be 100 things.

[SimonR32]

Black wins

[NYTSKY]

^^^^^^I agree, doesnt really give that much away in low down response and has a healthy top end, plus the boost curve is almost flat 20psi.

[R31Nismoid]

If you wanna discuss winning lines, the green one is winner, much fatter midrange with the extra boost.

[NYTSKY]

Considering both black and green are using the same turbos, it shows what a good engine build does for response/power.

[adzR34]

Ash, great effort on the comparo this is exactly what makes this site useful.

I'm looking for turbos at this stage and your turbos seem very appealing, theyre more responsive and overpower the 9s. Boost issues aside, the 9s seem to be behind these hybrids by some way.

Do you know if race pace will be selling these offshelf?

[SimonR32]

If you wanna discuss winning lines, the green one is winner, much fatter midrange with the extra boost.

I discounted this because it had the better motor, but still same turbos

Edited January 16, 2011 by SimonR32

[Count Grantleyish]

Don't know. Mate of mine said mine was quite a bit more responsive than his, given our turbos are similar, we now know why.

No doubt he'll get it fixed eventually. Could be 100 things.

With a GTR, it's more like 10,000 things!

Yeah yours look as responsive as, wouldn't mind having a ride in it.

I'm curious on -9s being bit laggier than -7 from my exprience, it's the other way. But I'm comparing 302rwkw GT-SS to 270rwkw R34 N1 with EBC, but I'm comparing apple with orange here.

[R31Nismoid]

All I know so far is they are 4 GT2860's made into 2.

Given Garrett don't sell the wheels separate to the cartridge for that series... So it gets very expensive quite quickly.

When I find out more I'll update.

[acsplit]

Maybe scan the graph rather that a photo easier to read and mark

[bigmikespec]

Garrett don't sell separate but you can get individual parts for Garrett turbos elsewhere.

SimonR32 would be interested to see your old T04Z graph I know it is a twins thread but just for comparisons sake as you had it pretty sussed out. Or maybe the thread should stay on topic a bit longer

[SimonR32]

Garrett don't sell separate but you can get individual parts for Garrett turbos elsewhere.

SimonR32 would be interested to see your old T04Z graph I know it is a twins thread but just for comparisons sake as you had it pretty sussed out. Or maybe the thread should stay on topic a bit longer

Similar to the 517z's up to about 120 then ramps hard and monsters everything... But yes stick to low mounts for now

[Snowman]

I discounted this because it had the better motor, but still same turbos

Really the major difference between the 2 is the amount of boost they are running.

Either way - they were both good track set-ups thats for sure. For everything else I'd prefer Ash's one.

[NickR33]

ash is that my T517 graph? if so head not stock... 260° 10.8mm lift cams... they're prob hurting the low rpm a bit

I'll take green thanks

[R31Nismoid]

Ah ok cool - I thought you'd taken them out.

Will adjust

[NickR33]

no that would have been sensible... sif listen to Benno, what would he know

also I wound the boost up another 1-2psi... so my butt dyno says mine is making well over 400rwkw now

[VB-]

any chance of labelling them? i'm partially colourblind and all i can see is lines...

[RB2600]

All I know so far is they are 4 GT2860's made into 2.

Given Garrett don't sell the wheels separate to the cartridge for that series... So it gets very expensive quite quickly.

When I find out more I'll update.

Apologies for the MAJOR thread revival, but I don't think anything else has been mentioned about these Racepace Hybrid turbos on this forum according to what my search results are showing.

Was the EBC eventually installed to see if there was any difference? (especially after the boost curve of this setup crosses over with the -7 setup, if it were able to at least maintain 19psi like the -7, that would be interesting to see)

Was there any further development into this setup?

[R31Nismoid]

Nope.