Help Me Decide Which Turbos For A Street/track Setup Gtr

[Marko R1]

any news 'boostdR' about your choice with turbo setup? how did u go with the gtrs v's 618z?

i am looking at the same thing & possibly building up an rb30 with 618z's (my current gtss setup will be too small for an rb30 if i take this path)

[BoostdR]

Still in production =)

[Marko R1]

are u still building the rb30? im stuck between a rock and a hard place whether i stick with the 26 or not

[BoostdR]

Yeah still with the Rb30, so much so I sold my complete 26 bottom end. I have all the parts now, accept the sump adapter.

[XRATED]

Any updates guys?

Who ended up with what... and how did it turn out?

Also, had anyone got a head to head t517z 10cm to t618z 10cm comparison???

[Marko R1]

im not sure where matt is up to but ive got my setup running.

my 'forklift' rb30 (tongue in cheek dirtgarage lol) with garrett -10's made 270.9awkw @ 6500rpm on 10psi, rich run-in tune.

final tune is booked for next week very happy with results thus far

i posted a thread here with dyno graph if u want more info: http://www.skylinesaustralia.com/forums/Pr...la-t277399.html

[BoostdR]

Hi all,

I ended up with a 89mm sleeved bore rb263# ?? HKS GTRS turbo's, E85 and 8.7 to 8.8:1 Comp for E85. I have had it on the Dyno for a initial tune. Maxed the fuel pump out @ 534kw and 20psi. I have a new fuel pump now and will install and get it happening.

Will be playing with the ingnition trasition onto boost and the cam gears for some extra response. I am using Stainless Mani's but may see if the 6boost ones fit without having to move all my lines.

Matt

Before and after. Similar response with more power

For those wanting to know if the HKS version of turbo is better. I can say they still surge slightly when loading up on boost in a high gear/low rpm...sound like a Cho cho train. I have no BOV's. Installing the std BOV's would prob fix most part throttle surge...but it's very minor and doesn't bother me.

Edited August 12, 2010 by BoostdR

[BoostdR]

Me personally, I'd go for HKS GT-RS twins interestingly. I'm not arguing with what your tuner says - but if I had not heard that and for some strange reason I wanted to go for twins at that power level, HKS GT-RS would be floating around the top of my list. Going for under 272deg duration is probably not something I'd do when going for turbos that size/power that high however.

The CAMS I ended up using are much smaller than 272 with just under 10mm. They work extremmely well. The Prelude was that we actually ordered a set of JUN 272's for a customers track GTR with -10's but by mistake got the lower duration and figured we will give them a go...results were very impressive and suprising to say the least.

[Marko R1]

Hi all,

I ended up with a 89mm sleeved bore rb263# ?? HKS GTRS turbo's, E85 and 8.7 to 8.8:1 Comp for E85. I have had it on the Dyno for a initial tune. Maxed the fuel pump out @ 534kw and 20psi. I have a new fuel pump now and will install and get it happening.

Will be playing with the ingnition trasition onto boost and the cam gears for some extra response. I am using Stainless Mani's but may see if the 6boost ones fit without having to move all my lines.

Matt

Before and after. Similar response with more power

For those wanting to know if the HKS version of turbo is better. I can say they still surge slightly when loading up on boost in a high gear/low rpm...sound like a Cho cho train. I have no BOV's. Installing the std BOV's would prob fix most part throttle surge...but it's very minor and doesn't bother me.

534kw YIKES!

u make me want to switch to E85 sooner rather than later! with that fuel u should be able to run 30psi without a problem.

is this power reading rwkw, awkw or engine dyno?

amazing power from the good old low mount setup, congrats

[DVS JEZ]

wow 534kw well done.

what fuel pump did u max out?

[DVS JEZ]

that 380kw is a lie, check out the intake temps of 63degrees,

[BoostdR]

that 380kw is a lie, check out the intake temps of 63degrees,

lol, agreed. Not sure what the correction would be. I have other graphs for 372 @ IT of ~21degree's

good spot

I more put it up for a Curve comparsion

[BoostdR]

534kw YIKES!

u make me want to switch to E85 sooner rather than later! with that fuel u should be able to run 30psi without a problem.

is this power reading rwkw, awkw or engine dyno?

amazing power from the good old low mount setup, congrats

It's at the Fly Marko. Was 457kw at the wheels.

Fuel setup currently is a GTR pump and single 044. I have another 044 to go in. Injectors(1000cc) are pretty much out of flow already even with my high rail pressure.

[DVS JEZ]

haha, atleast u admit it lol.

when are you taking it to test it at eastern creek

[BoostdR]

haha, atleast u admit it lol.

when are you taking it to test it at eastern creek

I don't live in Syd anymore. I'm in Adelaide. Will be at Mallala this weekend.

Will be Pit Crewing at Eastern Creek on the 3-5th of Sep. Might bring it up to WSID on the truck.....May need a couple of spare gearboxes...

[DVS JEZ]

ahh k. take lots of footage

[bigmikespec]

I don't live in Syd anymore. I'm in Adelaide. Will be at Mallala this weekend.

Will be Pit Crewing at Eastern Creek on the 3-5th of Sep. Might bring it up to WSID on the truck.....May need a couple of spare gearboxes...

When will be you be at Mallala on the weekend, weather permitting I guess? Would not mind coming to have a look if you wouldnt mind...

[Marko R1]

It's at the Fly Marko. Was 457kw at the wheels.

Fuel setup currently is a GTR pump and single 044. I have another 044 to go in. Injectors(1000cc) are pretty much out of flow already even with my high rail pressure.

that figure of 457awkw is aligned with what my tuner advised i could achieve if i switched to e85.

what exhuast diameter are u running?

[BoostdR]

ahh k. take lots of footage

Planning on it =)

[BoostdR]

When will be you be at Mallala on the weekend, weather permitting I guess? Would not mind coming to have a look if you wouldnt mind...

Will be there on Sat. All day

Come say Hi.

Matt