Whos Interested In The Gt3076r/gt3037 In 52 Trim ?

[GTScotT]

John is that HP or KW?!

[bri73y]

Good pick up....... I'd like to say KW but it's HP.

This dyno is notoriously low reading. My 32 went 630 on Jem's but only 537 on this one with no changes.

Remember though this is a run in tune, pretty fat without a lot of timing.

[GTScotT]

Impressive none the less!

A run in tune and its ramping up in the early 300 mark.

I can imagine at full pelt and 30 odd PSI its going to crank something severe. I may need to consider one of these for myself!

[Lithium]

Awesome, gives a decent idea of how it comes on already - pretty much how I hoped it'd look, keen to hear your driving impressions .... especially when it gets the full tune in and the timing is sorted.

[bri73y]

Yep, if it can hit 450-480 on this dyno then it's going to be a quick car, no question.

I don't see why it won't given we've got atleast another 14-15psi to stuff into it yet.

[Mitcho_7]

That is a nice looking graph for only 17ish psi and a run in tune.

Those turbos are a smidge more in terms of $$$ then the standard gt3076 aren't they?

[GTScotT]

http://store.forcedperformance.net/merchant2/merchant.mvc?Screen=PROD&Store_Code=FP&Product_Code=NTGT3076HTA&Category_Code=Turbo-FP

Plus about 150 to ship it.

[34GeeTeeTee]

http://store.forcedp...y_Code=Turbo-FP

Plus about 150 to ship it.

Worth every cent by the look of it!

[Lithium]

Hmm they're gradually crept up in price, still reasonably comparable with a GTX3076R - and I'd rather the HTA personally.

Yep, if it can hit 450-480 on this dyno then it's going to be a quick car, no question.

I don't see why it won't given we've got atleast another 14-15psi to stuff into it yet.

Crikey - I'm not sure how much was said in terms of power potential of these things, and I don't want to set expectations - but it wouldn't surprise me at all if your target range turns out to be a good part of 100whp low.

[bri73y]

Yeh I know where they can go, but I also know this dyno and how low it reads.

Hence my comment "on this dyno".

We'll push her next week and see where she ends up.

My GTR averages around 500hp "on this dyno" but it's done over 600hp on multiple occasions on two other dynos.

[Lithium]

Yep very mindful of that too, hence being very non-committal to my comment. 388whp on 16-17psi with a soft tune is promising though!

Cheers for keeping us updated

[R31Nismoid]

GT-RS is very snappy on/off throttle compared to the 2835ProS so a better thing in cut and thrust city traffic. The ProS needs a slightly bigger throttle opening to get the car to move so despite dyno printouts looking similar down low they feel very different on the road. Once the roads open up the ProS has more legs and is fantastic particularly 80-110km/h when overtaking.

The GT3040 and GT3076 feel like slightly larger framed turbos and are not as responsive in traffic but have a whole lot more to give once they come on boost. The much maligned GT3040 is very close in performance to the new TS GT3076 with a few hundred rpm difference in boost threshold which could be due to tuning as much as compressor size or TS turbine housing. IMO the GT3040 is a budget GTX3076 and all it needs is someone to use E70-85 to prove it but no one has done it yet. Given the cost vs gain I wish I had stuck with my GT3040 although the GT3076 is a better thing it just wasn't worth the coin changing over.

Very well said, massive thumbs up there!

Just because it "looks" the same on a dyno, doesn't mean they are.

Same as -5s/-9s... Come on very similarly on a dyno - on the street it's totally different.

[Lithium]

Very well said, massive thumbs up there!

Just because it "looks" the same on a dyno, doesn't mean they are.

Same as -5s/-9s... Come on very similarly on a dyno - on the street it's totally different.

Agreed, I should have mentioned that - he gave the exact answer I was looking for. I wouldn't have changed from a GT3082R to a GT3076R if I already had the GT3082R, not surprised the spool improvements weren't worth the effort - though in saying that if I had a clean slate I would have gone the TS GT3076R over the GT3082R. Is that fair to say Wolverine? And which is your favourite after having tried the bunch?

I also totally agree with dyno versus road comparison, more so than ever lately. I've experienced a bush bearing turbo rated to similar power as a GT3076R which dynos VERY similar to a GT3076R but on the road the difference is amazing, GT3076R makes a much quicker car in the real world. Same with tune, the percentage of the time you are hitting the bunch of load zones that you hit on a power run on the dyno isn't 100% by any stretch - if the rest of them aren't optimised sufficiently then a car can end up no way near as quick or smooth as the pretty dyno plot may imply.

One just has use the dyno as a general indicator assuming all other things are equal, though if a turbo has smaller wheel measurements it is easily believable that it may "come alive" quicker even if the dyno plot doesn't suggest as such - one of the reasons I am quite excited to see how this GT30R HTA goes, I reckon it could feel VERY lively for whatever power it makes once it is done.

[wolverine]

Agreed, I should have mentioned that - he gave the exact answer I was looking for. I wouldn't have changed from a GT3082R to a GT3076R if I already had the GT3082R, not surprised the spool improvements weren't worth the effort - though in saying that if I had a clean slate I would have gone the TS GT3076R over the GT3082R. Is that fair to say Wolverine? And which is your favourite after having tried the bunch?

I had the engine out so I figured why not change turbos. I have very few vices so spending a few dollars on the car to see if there was any step up in performance isn't a big deal. Since the main practical difference is a slight change in driving style to keep a few hundred rpm on board to keep parity it was a bit of a waste of time.

Picking a favourite out of the bunch is hard because they all work well at different times. It feels like picking between blondes, brunettes and saucy redheads.

[discopotato03]

The red with brown eyes , unique combination .

Good to finally see some RB results with a HTA30R , somewhere in Evolutionm.net Burcher is supposed to have got 600 whp + tq in pounds with one of those at from memory 30+ pounds of boost .

Lith did you ever see any results from the little known about 73mm HTA30R ?

A .

[Lithium]

Wolverine - yeah sorry wasn't knocking you for doing it at all, but more looking for confirmation that my assumption was that they were close enough in performance to not provide an amazing improvement (ie, already had the GT3082R) but doing it right first time would be going to the GT3076R?

Disco - Nope, I only know of one guy doing a build with one and he is mostly out of the country so in no particular rush to get it done

[wolverine]

I wasn't feeling knocked Lith, it really depends on what you want from the turbo. GT3040 on pump is probably a little too much compressor for the turbine but add pineapple juice and it all changes. It really comes down to what you want from the car.

I did prefer the GT3076 over a GTX3071 on pump so yeah GT3076 is a pretty good choice as an all rounder.

[Lithium]

Yeah - will have to see how this result for Bri73y's car goes, in my head the FP GT3076R is the perfect match for an RB25 and I'm pretty cool to see how that matches up with real world results

[discopotato03]

After speaking and or reading thoughts mainly from Dale Wolverine Lithium and Mr Mafia I think my best path ahead is to unwrap my GT3037S/GT3076R 52T and get the bits to fit it . From what I could find out a few years ago these are about a 49 lb/min turbocharger or about 5 down on the 56T version .

My reasoning is that it has just a bit more capacity than a GT3067R and a bit less than a 56T or GTX3071R . I think with these GT3076Rs you have two valid choices of turbine housing AR (0.63/0.82) so its possible to size them to suit your needs ie a bit earlier response or a bit more top end power .

There just isn't going to be big performance with a GTRS and the GTX67 is an unknown quantity , and too small for anything larger than 2.5L .

With a turbine housing change you could probably get away with a mid trim GT3076R on say a street RB30DET where smaller units just aren't going to cope - IMO anyway .

The only decision now is turbine housings and I plan to read everything I can find that Mr Mafia said about his car . My gut feeling is 0.63 AR because I don't use big revs much so getting 300 odd revs sooner boost would be more usefull - to me anyway . Mr Mafia ran water methanol injection where I'm using E70 Eflex .

I don't know what the real world difference is between the 52 and 56T versions response wise but it would make some difference in boost response .

From memory my GT30 has the Garrett big can 18 pound actuator on it already and its 0.82 housing the large valve .

Its been quite a while since I looked into a GT30 turbine housing particularly a 0.63 AR one and I'm wondering if they could use a little smoothing inside , not so much to enlarge it but just to let it flow as well as possible if its a bit rough .

Not sure if this is the right place to ask who sells good spacer plates and studs to bolt these turbos to an OE manifold . I will re-use the HKS water and oil lines because they should all reach the GT30s center . I hear there are some good one piece front pipes to join the t housing to the cat . After that I suppose oil drain and a 100mm rubber or silicon bend to make up an induction pipe . I run MAP sensing nowdays so reversions here should be no issue .

I'm guessing it could make 300 or a little over if the exhaust and filter are up to it and fingers crossed should lift its skirts from about 3000 up .

Thoughts , cheers A .

Edited March 12, 2013 by discopotato03

[Lithium]

I am actually surprised, didn't see that coming.

I don't think the 52trim will stand up hard at 3000rpm, even with the .63 hot side - I'm not sure where the GT-RS wakes up to be fair. Do you have a way of showing a datalog/graph of spool with the GT-RS etc? Would actually be quite interesting to see what you are dealing with and how much more you can live with.

If I were a betting man I'd honestly say the GTX3067R with a .63 hot side would be a good goer for you - get a ViPEC/Link, and use the Link boost control to make a boost curve which comes on hard up to 1.4 bar and bleed it back to 1bar at 6500rpm+ to not overwork the turbo.

I believe it will see around your 300kw @ wheels (maybe a bit more), and pull like a monster from low down. You know you have strived to make something that does something like this, there is some risk being a pioneer and I reckon the worst case scenario is you end up with something a bit laggier than the GT-RS and a bit more power - but there is a very real chance it will give you a substantial power gain with little driveability compromise.

That is my first thought, anyway. You mentioned there will be results from someone soon for the GTX3067R - you've waited this long, just hold out for them before doing anything hasty.