Barbz, what would be the difference between all that package and the GTIR instead of the Superspool? Funny you also recommend the DV007. What does it bring over the 006? I'll probably have all the above + small FMIC but GTIR and DV006 so would be interesting to hear why you personally recommend those specific parts!

Wonderful to see quality people on the Forum more again. I have no doubt your 'little project' there is the cause of that.

interesting that Barbz also recommends the standard exhaust, albeit with sports cat, as that's one of the first things that everyone replaces, is that stock exhaust cat back as well

Not me. I actually run the standard exhaust and have a racecat ready. Joe! You're sending me that for my birthday?

I think he was saying you wont get more power by increasing the bore size at that power level, but reducing the cat restriction is beneficial. I would go for 2.75" just for the sound though.

Most people put a stainless one on out of necessity when the tail pipe falls off the standard one...

i changed mine to a decat almost purely for the sound, if it released a few bhp too then all the better imo

Nigel- its great to be back, thanks.
Ahh! My little project is on going and nearing completion. I was unable to resist when i got back, something to keep me out of trouble .
Nice to see the coupe tuning scene still going strong as ever.
There are great gains to be had with headwork and glad your still reaping the benefits.
Peak BHP figures only give a small reflection of the performance but not a true indicator of the overall powerband.

Hi Kayjey,

Well, out of all the hybrid turbo's we released over the years the Superspool is my favourite. Gives great low to midrange torque/response and minimal supporting mods to enjoy its benefits.
DV007 more compact and discreet ..

Thanks Matt.

Barbz, how would you compare the GTIR to the superspool? Judging from the stories on here I too would think the superspool would be the one I would go for, but I don't think the GTIR is all that far off, other than the powerband being shifted to the higher revs a bit? By... 500-700rpm or so? Saying you have the mods as you described, then superspool versus GTIR would mean what?

someone uploaded a direct comparison graph ages ago, they were almost identical with the superspool coming in a tiny bit earlier and the GTIR going slightly higher at the top. superspool was a lot closer to the GTIR than it was to the std turbo.

One thing I'm thinking is not just the 0-60; but the 0-100, 50-90, quarter mile times etc...

Superspool gains ahead from 3000-5500rpm then GTIR takes the lead. For everyday road use, most your driving will be in the above rpm ranges.

Yes they are my charts

GTIR = stage 1 hybrid?

different folk call there hybrids different things just to confuse the issue, the stage 1 hybrid above would be the gti-r with 60trim compressor wheel

from what Barbz said his hybrids are

stage 1 superspool 55trim compressor wheel standard turbine wheel

stage 2 gti-r 60trim compressor wheel with standard turbine wheel

stage 3 62trim compressor wheel (from gt28rs) with standard turbine wheel (aka mini rsr)

whereas to confuse the issue rog from poweritalia hybrids are

stage 1 standard wheels with uprated seals and 360 thrust bearing

stage 2 gti-r 60trim compressor wheel with standard turbine wheel

stage 3 62trim compressor wheel with larger 76trim turbine wheel (aka mini rs)

flea has called the gti-r a stage 1 just to add further confusion lol

Barbz.

Drop me a PM with your number, be good to catch up

Flea, a bit confused: your Stage 1 hybrid shows max bhp at 305 bhp, but the graph would say around 290? Noticed the Torque graph has the correct bhp figures but no torque figures - not that it matters that much, personally more interested in the graphs, although the standard turbo does seem to have got a bit lazy. A brand new standard one shows a slight 'bump' around the 3.200 mark, like the superspool does, although the mapping to 265bhp may have smoothened that out?

I'm sure that the superspool and gtir turbo's are very good, but I made the decision of going for the full fat 62 trim with larger turbine after speaking with CRTurbos.

The guy basically said that the STD exhaust turbine did not flow enough even for the STD turbo, so when you go fitting larger com
Pressor wheels you are making the balance of flow through the turbo even worse as it then has to deal with more exhaust gas and higher temps that It can't expel quick enough.

With the 62 trim and larger turbine with the 76 trim you are balancing the turbo back and it will make a more efficient turbo as it can now flow enough to get rid of the exhaust.

In my opinion the 62 trim is the one to go for, to me it doesn't feel laggy at all and in my personal opinion the lower spec hybrids don't give you as much potential so not as good value, this is all in my opinion though and yes I have had a superspool before, great at the bottom end but the party fizzes out to quickly.

Hope someone may find all that dribble useful hehe

Davie

As you know, every car is a little different Kayjey. With this in mind, I have averaged a few cars and then plotted the graphs to getter a better representation for the typical setup.

The thing with modifying a car is that you don't "have" to do it all in order to get some good gains! We all have budgets and desired goals, all of which will affect the power output and general driveability +/-. One of the biggest simple variations is the fuel quality used i.e. 95, 97 or 99 octane.

In answer to the original poster's question, yes there certainly is a huge difference between 220bhp and 300bhp. By this I mean not just peak power, but if done correctly all the way through the rpm range. At this level you can improve on every single aspect of the engine's performance.

If your pockets are deep enough then you can even do some remarkable things even when pushing well over 400bhp. We currently have a GT3071R 0.64 turbo that is making 1bar in 4th at 2950rpm!!

regardless of what the theory says about the flow rates of a t25 wheel in a 0.49a/r turbine housing in terms of what bhp it can support, i think it has been shown on numerous occasions that a t25 wheel in a 0.49a/r houseing can flow 300bhp on a 20vt

that's not to say that the larger 76trim turbine wheel wouldn't do it more effeciently and the larger wheel certainly has more potential for increased flow

I wasn't saying they were so inefficient they would not flow at all, obviously they can make the power.
But I would bet that the EGT's would certainly be higher on the lower hybrids. And if I was using one on a track under hard conditions I would be a little worried.

A turbo that encourages higher EGT's is not a good thing.

As said this is all my opinion.

The biggest problems when using hybrids is that there are no suitable maps to look at, sure you can estimate but your never really going to know how close you are to the choke line other than from results of an
engine dyno or maybe live mapping.

I think a lot of it's down to how you drive the car as well, if you go on track or drive it hard then you are probably better going for the most efficient set up with the lowest exhaust gas temps etc

but if its an everyday driver and driven gently a lot of the time then the saller wheel will give better response particularly lower down, all down to different opinions i suppose, possibly why Barbz uses a t25 in his 62trim hybrid and rog uses a 76trim wheel in his 62trim hybrid

Barbz did say that he found the 76trim wheel a very on/off type wheel and that he found the smaller wheel more progressive, but again part of that will probably be down to the rest of the setup

the only real way to know for sure how the different hybrids would perform all things being equal would be to swap the various turbos on the same car and then dyno them

Leighton, would this 1bar be on the dyno, or on the road? I'm intrigued to see where my little disco potato makes this now for comparitive purposes.

When I was into the R5 scene a few years back, the VNT turbo's were really making waves, they would make boost so low and so aggressively the owners were splitting liners.

So.. I have no doubt that if you really know what you're doing and have the cash then you could build a coupe with a VNT and a carefully setup boost map and make a seriously quick car.

In many ways, the coupe scene is a some way behind the R5 scene, because they have to work with an engine from the 60's and have had an extra 10 years to experiment they've tried everything.

But I also think that the R5's were cheap to fix if you did split a liner, something that puts a lot of us off pushing a coupe too far.

just think a 1.4 R5, with fuel injection, has run an 11.2 quarter! that's insane!

Good stuff Babz. Superspool all the way! I never liked the way the GTir turbo kicks and its only good for high end of the power band. Babz how about a basic Aquamist S1 for the ones who want to do frequent autocross and track session in summer. Is it worth?