280rwkW at 1.2 Bar

[Freebaggin]

Did a few tweaks to get new power level:

- Exhaust Cam gear (OS Giken), 5° retard

- Tubular SS exh manifold (didn't make much difference on its own unfortunately)

- Swap to better Matrix mode tune with LT-12 Mictotech from old-style mode (leans out some rich spots I had)

Shaun at BoostWorx did the work, excellent stuff as per usual.

Green plot is old setup. The old power curve indicates better low down power but that's due to different ramp rate on dyno helping to spool turbo earlier, so if Shaun had done that same ramp rate, <3000rpm power with the new setup would have been better.

Not sure why he does that because it can make a dyno plot look like shit at lower RPM??? Anyway, if we have another dyno day, we should make sure ramp rates are the same for all, within reason of course.

[MattR]

well done mate she's looking good

[COPYME]

280 lots of fun at that power!

[Clint32]

good stuff mate, the dyno thing is confusing and thats part of the reason im getting mine done on a engine dyno, ill know the exact engine hp and torque to compare against the nornal dd run

[Freebaggin]

Cheers all.

Clint, will also be very interesting to see outright engine vs chassis dyno figures when you're done.

From all accounts it's a linear relationship re engine vs chassis numbers, not a multiple like 1.3 for eg.

So a smallish FWD car might loose 40rwkW through drivetrain whether the engine is pushing out 100 or 200 kW.

A mid size RWD, I have read, is a 50kW drivetrain loss, so for example when I first got my car it had 136rwkW, which = 186kW. Now 280rwkW = 330kW.

For bigger cars like old Falcons, Monaros and also 4WD GTRs, typical losses are 60rwkW.

We'll see as yours is full R33 and GTR running gear is that right? So you might expect 50-55kW loss.

[Clint32]

r32 and rwd only, rb25.5 and yeah a fixed loss is what would be expected

[Bl4cK32]

Excellent results mate I gotta see Shaun real soon....as soon as this damn gearbox goes on AARRGGHHH!!

So is this result going from the std manifold with the external gate mounted on it to a tubular one?

[Freebaggin]

Excellent results mate I gotta see Shaun real soon....as soon as this damn gearbox goes on AARRGGHHH!!

 

So is this result going from the std manifold with the external gate mounted on it to a tubular one?

Thanks. I have internal gate turbo, so just a swap from stock cast manifold to tubular SS manifold.

[Clint32]

was it in the exact same position as the stock turbo?, like to one autobarn has, as they are not as good in my opinion looking at the way the runners merge

[Bl4cK32]

was it in the exact same position as the stock turbo?, like to one autobarn has, as they are not as good in my opinion looking at the way the runners merge

No offence to Trent, but thats what i thought when i seen em.

[Freebaggin]

was it in the exact same position as the stock turbo?, like to one autobarn has, as they are not as good in my opinion looking at the way the runners merge

Yep that's the one, I thought the same re cylinder 5 runner in particular however at the same time I thought it was much better than stock simply by virtue of the larger ID of the runners. Who knows, the extended power range at the top end I now have might not have been achieved with the old manifold. I read around on various forums and the consenses was that three into one from each bank of three was better than six into one. The manifold from Tilbrooks (Mick Stanic...is he still there???) is oen of the best around, but again much more expensive.

Anyway, for the price (less than half of anything else I have been quoted) I'm happy enough.

[Chris32]

Good result mate, gotta be happy with that!

When can I have a drive ?

[whatsisname]

Excellent stuff Lach' As per usual, Shaun comes up with the goods.

Our cars are damn near identical in terms of power/torque now mate! I do run more boost (~20-21psi) to make ~ the same power, but that's to be expected with the lower comp ratio. I'm still using the stock ext manifold, but it was cleaned up and port matched.

You'd better be out at the next AIR meet with me mate! We can try and run vs. each other. It'll make a damn good grudge match

[Steve]

Nice result Lachlan.

The manifold at Autobarn looks alot like the trust one, which is around 3 times the price. I agree 100% on the merge the gasses before they hit the turbine housing, and as you say, bigger ID is all good.

At least it will sound alot tougher, I reckon the note is worth the price alone:)

[Martin Donnon]

I reckon the note is worth the price alone:)

And who said you werent a Rice Boy Steve!

[whatsisname]

Steve just needs to whack the stickers down the doors and he'll have the complete Rice Boy package

[Steve]

Martin, who would say such a horrible thing, I am a ricer to the bone!

Matt, yep, some stickers and perhaps I can borrow one of your neons for a while? gotta be worth a few killer watts.

[Martin Donnon]

Martin, who would say such a horrible thing, I am a ricer to the bone!

I want to buy your roll cage when you sell the car......at least I know it will never be close to being used!

[Steve]

no probs, I dont think you will like it much though, rattles around heaps. Someone said something about bolting it in?????

[Steve]

Sorry for all the whoring Lachlan, I'll stop now (unless Martin keeps going)