304 remap + MBC ?????

[cameron]

Can you run a HLM 304 + an MBC at the same time?

Would there be a big difference in Performance ?

Any Pro's and Con's ?

Cheers

Lee

[BruceT]

You can, technically.

Aslong as the MBC is within 1-2psi of what max boost of the map is?

[cameron]

Iirc when i went on a test drive the day it was done it was boosting @ 1.1bar, the guage goes off the end of the white bit on the clocks.

Not sure what psi it is though ?

Anybody ?

What would the advantages be if any ?

Lee

[zoomungus]

15.95418 psi nearly 16 psi cool!

[cameron]

So is that good ?



Lee

[zoomungus]

yep! better ask someone who knows but i think thats fair boost

[cameron]

And awesome only registered 222bhp

Its tonnes quicker than my old car, Pault5estates and that registered 226bhp

Think i need to get it run on another RR to get a second opinion.

Lee

[zoomungus]

at the wheels?

[t5 pete]

at the wheels?

yes that figure was at the wheels

[t5 pete]

So is that good ?



Lee

15-16psi is probley the best pressure you can get from the 304

[Enigma666]

It seems strange that RICA only map the 304 for 16psi when the RICA for the S40 T4 is 17psi on a smaller turbo. I guess that is the benefits of the larger turbos needing less psi to flow more power

[cameron]

Yeah 222 atw's

The guy could not get it to run properly at all

Need to get a second opinion me thinks

Lee

[zoomungus]

you will see more bhp at the flywheel maybe 25% more, another 50 brake maybe, ask irf he would know

[cameron]

Tomcats has the same map and he reistered 264bhp.

Id be happier if i seen a read out of about 260

I'll keep you posted mate.

Lee

[Mrsmopp]

Lee just bear in mind that auto's are notoriously difficult to dyno as there is no coast down to measure.

Before you add an MBC to a car that is running right and you are happy with (bar the figures on paper) ask yourself if you want to risk damage to your engine from raising the boost to high?

[BruceT]

It probably isnt far off 260 at the crank/fly.

Autos have more drivetain loss then manuals, too? IRRC?

You can fit an MBC with the HLM304 aslong as the MBC boosts to the same as the stock BCS/Map. IE what it is now, so aim for 15psi-16psi or 1.1 bar.

MBC will be less progressive then the stock unit, but it will "feel" faster and technically would be quicker with the assumption that the stock bcs is tired and the MBC will not limit boost at all, it will aim when at WOT to hit the max the mbc is set too. Where as the stock bcs will aim to be more progressive and not give max boost till higher in the RPMs.

For £30 id try it and set it for 15-16 psi and see how you get on.

Just please remember, start low with the MBC and gradually increase it.

As the ECU will have NO control to reduce boost. Im not sure about fuel cut in on the remap either so things could/WILL go wrong if it boost too high.

[nathT5]

the difference of wheel power and flywheel power on mine was only 17
i,m not sure thats possible, even they said it should be about 15%, thats a 36 difference

as for yours lee, you need to go somewhere who know autos, i bet awesome havent seen many

[Enigma666]

I was wondering the same Nath....whenever I calculated whp on the Volvo's I always assumed 15% tranny loss.....seems like Awesome were suggesting as low as 8% or so....clearly there are some issues here with one of their measurements.

[Wobbly Dave]

you will see more bhp at the flywheel maybe 25% more, another 50 brake maybe, ask irf he would know

That's not correct - at least not in my experience. you can see the difference on Joules's car - 311 ATW = 335 Crank.

Most I have seen is about 10%

[Enigma666]

Ok.....335 bhp -7% in Jules case then is 311 whp...either way I would say still too optomistic for this drivetrain wouldn't you?