56 replies to this topic

[siztenboots]

Garrett GT28-71 RS turbo
equal length tubular manifold
forged pistons, steel rods, lightened and balanced, under piston cooling installed
High Flow Injectors (550cc),
80mm air flow meter,
high flow enlarged tophat
uprated inlet and exhaust cams, modified head,
3" bespoke exhaust system with sports cat,
Courtenay-Klasen High Flow Inlet Manifold

[jonnyboy]

Sounds like a total nightmare to me lol

[SteveA]

Ker-ching! ££££££££ Nice to see developers are still producing options for us, even though most will not take this route.

[smithers]

any heat issues? or too early to tell? plus - what clutch are you now running? mine is none too pleased with 300bhp! sounds like a handful

[techieboy]

+80bhp +80lb/ft at 5,000rpm over the Stage 5 Is this the Scottish Astra VXR?

[siztenboots]

+80bhp +80lb/ft at 5,000rpm over the Stage 5

Is this the Scottish Astra VXR?

its an old astra gsi with the z20let block

[slindborg]

meh, the core question is how much?

[turbobob]

meh, the core question is how much?

And how long will it last?

[siztenboots]

meh, the core question is how much?

no idea, I suspect you could build better without so much bling and focussed totally on specification of materials

no details about comp ratio , but looks like mid range has suffered noticeably ,

compare : http://www.dyno-plot...vx220/index.htm

wonder if they used an early x20xev crank instead , no balance shaft cogs, so lighter

apart from that I'm disappointed it doesn't rev out to 8500 for a built engine.

[slindborg]

its got to be knocking on the door of £7-10K if its built by a company etc... for that money you could have the same 420-450bhp with tons of torque mid range on autronic and rev to 8.5K etc blah blah blah im soo bad for being anti tuner blah

[Nev]

I was quoted £ 13.5k for a similar amount of work by a certain company (who I will not name), and that was without the Klassen inlet which itself is £800 more. I am attempting a similar (but more powerful setup (due to larger turbo with more high revs puff mainly) on my car for approx £9000 (and thats including the Klassen inlet). You can thus draw an approx idea of the profit margins made. Having said that, I consider the profit margin fairly sensible. Looking at the torque curve, I would say that it looks excelent with very little mid range peak, making for a very progressively featherable throttle. I will be very happy if I achieve a simliarly 'flat' torque curve. As for not maxing out at 8500 revs, there is a lot of worthyness in not needing to rev the engine over 700 PRM - namely longevity. The difference of engine life from 7000 revs to 8500 is logarithmic. That said however, if you wanted the car for tracking it would be much better to have a steeper BHP curve in the last 3000 RPM, as that BHP curve is too flat to be worth reving over 5700 revs.

Edited by Nev, 02 February 2010 - 05:20 PM.

[Winstar]

apart from that I'm disappointed it doesn't rev out to 8500 for a built engine.

the turbo is too small to flow enough for 8500, it's the classic problem of a fixed geometry turbo that you can't get a wide enough range of flow.

[siztenboots]

ITBs

[Duncan VXR]

Good results from that turbo Looks like the new cast manifold is working well and will def help with heat managment So looking at that spec I need to buy a trubo and manifold and make downpipe lol Be interesting to see how much the inlet manifold free's up on the AET K04/06 hybrid edit: my mistake forgot that was on tubi mani

Edited by Duncan VXR, 03 February 2010 - 03:04 PM.

[techieboy]

ITBs

Well, more accurately, ITB.

[alanoo]

The torque curve looks actually not that bad Looks like a driveable one

[Crazyfrog (Fab)]

Well, more accurately, ITB.

itb's i am in two mind at the moment either to progress on stage 3 itb's or to supercharge don't let me go on the dark side as well please
itb's is a very costly way of modding and i am finding out at the moment but when i start the car it is 100% better oral than s/c

[alanoo]

Well, more accurately, ITB.

itb's i am in two mind at the moment either to progress on stage 3 itb's or to supercharge don't let me go on the dark side as well please
itb's is a very costly way of modding and i am finding out at the moment but when i start the car it is 100% better oral than s/c

You can have both... Rotrex + ITBs

[Crazyfrog (Fab)]

You can have both... Rotrex + ITBs

i know i have been looking on that option

[techieboy]

i am in two mind at the moment either to progress on stage 3 itb's or to supercharge don't let me go on the dark side as well please

All we've heard from you since the moment you had those ITB's fitted is that they're the best things known to mankind and that all a supercharger did was make a whhheeeeeee noise. Now look at you, seriously considering getting an SC conversion.

Edited by techieboy, 04 February 2010 - 04:21 PM.