Turbonetics Gtk Series

[phunky_monkey]

Thanks for that Ian, good to know. Geoff seems to think the that will be the case.

Dave: I'm not mate, from what I'm hearing about the BW range it doesn't seem to be too much of an issue due to their design.

[STATUS]

Lithium: In the same scenario Geoff Raicer puts the 76 in third position, stating he'd definitely choose the BW over it... I did read that thread earlier this morning, but it's not a true comparison to what I'm after. However it is food for thought, and the response is not fantastic. It is a fair midrange loss to the 76.

Dave/Trent: On an old test done by yourself Trent, the T518Z 8cm made 150 by 3400rpm. Geoff thinks the 30R kit will have the same response with more top end on my engine. I'll ask for a chart

Yeah i should have been a bit clearer, ramp rate on that particular setup. the smaller stuff i can have no questions.

It's truly fantastic if it realizes that sort of response on a comparable ramp

[phunky_monkey]

Hey Trent, I realised what you were asking, it was me who wasn't clear enough. Geoff was indicating that the 3071 TS setup could have the same response as the T518Z 8cm, but with T67 top end on the right setup. I sent him your chart, as well as few others from a few years back, as a comparison of what I thought was a good setup.

[STATUS]

Hey Trent, I realised what you were asking, it was me who wasn't clear enough. Geoff was indicating that the 3071 TS setup could have the same response as the T518Z 8cm, but with T67 top end on the right setup. I sent him your chart, as well as few others from a few years back, as a comparison of what I thought was a good setup.

ahh cool, dont get me wrong i reckon the ts 3071 is a good road to travel down if your willing to use a full race manifold etc. I have never done it, and i consider 3500 for the kit to be quite cheap but it is hard to justify to a customer a turbo gate and manifold (if prostreet manifold 2400 alone) setup, especially as most SR customers have the shitty 2871R cemented in their minds as the be all end all..

Edited October 20, 2009 by URAS

[phunky_monkey]

$3500US for the kit seemed quite pricey when I looked at it initially. But with the strength of the dollar, and after pricing up a kit made here it really isn't (even if you're slugged with taxes), and you know you're getting a proven product with good support.

[juggernaut1]

Out of interest Dane, you might remember "_omg" from NS.com - his drift car was reportedly putting out 315rwkw's with a 3071 on a 2.2 SR. "Full boost" was under 3500rpm from memory with the open housing.

Edited October 21, 2009 by juggernaut1

[badhairdave]

omg was the guy i talked to early on in the planning stages of mine.

The 315 was on c16 but the peak figure on it's own honestly didn't do the thing justice.

It was just unfortunate that it kept smashing boxes and drive shafts.

[phunky_monkey]

Funnily enough Greg, _omg, helped me out with specifying my engine in 2006 when I decided to build (yes, it's been that long since the car has been in my hands for longer than a few weeks). Full boost at 3500rpm would be absolutley crazy, I'd be so stoked if I could get near that.

Also, just received some quote back from Full Race. For anyone interested the S200 is not much cheaper than the 3071R, certainly not enough to warrant it based on price like some other BW Turbos. So it's purely down to performance.

But at the same time, if I could achieve anything near what Greg did I'd be over the moon, especially if it was with a single scroll housing as it would definitely be nice to spread the cost over time.

[juggernaut1]

Yes I remember him calling it a "monster" in some of his posts. So it sounded like it had a huge mid-range.....which wouldn't be kind on the weak SR drivetrain.....not that drifting would be kind on any drivetrain

Edited October 21, 2009 by juggernaut1

[badhairdave]

Funnily enough Greg, _omg, helped me out with specifying my engine in 2006 when I decided to build (yes, it's been that long since the car has been in my hands for longer than a few weeks). Full boost at 3500rpm would be absolutley crazy, I'd be so stoked if I could get near that.

Also, just received some quote back from Full Race. For anyone interested the S200 is not much cheaper than the 3071R, certainly not enough to warrant it based on price like some other BW Turbos. So it's purely down to performance.

But at the same time, if I could achieve anything near what Greg did I'd be over the moon, especially if it was with a single scroll housing as it would definitely be nice to spread the cost over time.

Did he recommend the stroker or the big bore? Any reason for going either way?

[phunky_monkey]

I actually just went back and read through my emails. He thought the big bore was a good idea, and also helped with the valve sizes and cam specs.

The S14 had a Tomei 2.2 stroker in it, but Greg thought the big bore was quite good value and said go for it. Cost was the main reason for going one over the other at the time.

[SRS13]

Dane; can you please link to the turbo kits you are looking at? The Powertune 3071/3076 twinscroll kit comes in at $5815 complete. That is a lot of money compared to the normal 3071 version kit at $3800. Seeing Dave's cars results I find it hard to justify the extra 2k.

Dave; What do you think you would make on a built motor with 24psi on board and C16? I bet it would be around 315rwk... and its a 2.0ltr. I dont think your set-up is too far behind these kits that are being discussed including _omg's. 20psi by 3600rpm still amazes me and I imagine it would have cost around $3k-$3.5k all up for the turbo, mani, gate, lines etc? Not a bad result at all.

[badhairdave]

I actually just went back and read through my emails. He thought the big bore was a good idea, and also helped with the valve sizes and cam specs.

The S14 had a Tomei 2.2 stroker in it, but Greg thought the big bore was quite good value and said go for it. Cost was the main reason for going one over the other at the time.

I'd be interested to know whether one or the other would have an advantage in the real world. If i had the money i'd probably lean towards a stroker from the (misguided?) view that the valve train would limit revs anyway so having the longer stroke would give better off boost torque. That and i thought the s14 was the shit back in 06-07.

Dane; can you please link to the turbo kits you are looking at? The Powertune 3071/3076 twinscroll kit comes in at $5815 complete. That is a lot of money compared to the normal 3071 version kit at $3800. Seeing Dave's cars results I find it hard to justify the extra 2k.

Dave; What do you think you would make on a built motor with 24psi on board and C16? I bet it would be around 315rwk... and its a 2.0ltr. I dont think your set-up is too far behind these kits that are being discussed including _omg's. 20psi by 3600rpm still amazes me and I imagine it would have cost around $3k-$3.5k all up for the turbo, mani, gate, lines etc? Not a bad result at all.

It's possible it could get there, There is certainly more in it on 98 octane but due to sparks breaking down and boost controller not liking running at a really high duty (i had a softish spring in the wastegate for the initial tune) i didn't get to see it. Though the delivery with the stroker engine would be different in the bottom half of the rev range, probably a lot more linear like the rb25 with the same turbo in that regard.

Price wise:

Turbo 2200 (it's been a while but i think thats what it cost me)

manifold 500

44mm flange and mods to manifold 150

gate 400 s/h

lines and sheathing 430 (teflon water, braided oil return with sheath,) I already had the oil feed

cams 690

greddy springs 100 s/h unused

so $3680 for the basics ($4470 inc cams and springs)

I also paid for the springs and cams to be installed which was 550 if you want to factor it in

You could probably save money on the lines and get the turbo cheaper by buying online, though if i were to do it again i'd spend more on a steam pipe manifold for piece of mind as it'll only work out a few hundred more in the scheme of things.

[phunky_monkey]

Dane; can you please link to the turbo kits you are looking at? The Powertune 3071/3076 twinscroll kit comes in at $5815 complete. That is a lot of money compared to the normal 3071 version kit at $3800. Seeing Dave's cars results I find it hard to justify the extra 2k.

The Powertune kit is not a good deal in my books, can be done for a lot less and with a proven kit to boot. I'd definitely choose the Full Race kit over the Powertune kit, and the bonus is it's cheaper.

This is the kit with the 71R/76R. http://www.full-race.com/catalog/product_i...roducts_id=1748

The same kit can be had with the BW Airwerks S200SX in T4, or the S200 in T3, but these are untested. For a single scroll 3071R kit I think the cost would be the following:

6Boost mani - $1000

3071R - $1800

Tial 44mm gate - $600

Dave: It will be interesting to see, and would be good to get some kind of back to back comparison. In hind sight I should have gone for a solid head with the ability to rev a bit harder, but I can always do that down the track a bit if that's how I want to go, and depending on the power delivery I get.

For reference, with the mild run in 14psi/220rwkw tune at 3200rpm I'm making 25rwkw's more with the new engine despite the 272 cams. Now sme of this surely can be attributed to the airtight seal with the manifold repairs, but despite this for it to have that sort of gain impressed me.

[phunky_monkey]

Check this thread out too: http://nissansilvia.com.au/forums/index.ph...459&hl=full race&st=0

It's Ian's (Juggernaut1) thread for his Full Race kit.

[BoostdR]

BoostedR: Do you have a dyno sheet by any chance? And is that a full V-Band system (ie Tial exhaust housing), or just for the dump pipe?

I am chasing that up for you. Would be good to see the response compared to a GT3017R form memory it made 1 bar just over 3000rpm.I was wrong about the Vband. I gave him a call(i built the motor a few years back) and the exhaust housing is the 4 bolt .63A/R option. It was ported to transition smoothly into the exhaust. It also has the 4" bell mouth comp cover(not the anti surge one) and yes it does surge slighlty. The Sr20 also has tomei poncams (256 i think), mild porting(bowl and short turns), tial 44mm gate, chinese 4-1 manifold(match ported turbo exhaust housing) Fuel is BP 98. Intercooler was a 620x500x70 PWR tube and Fin.

[phunky_monkey]

Thanks for the info Matt. I'd look forward to seeing the dyno if you track it down.