S W Autos & The Mouthy Blonde

Hi,

Let's get this thread back on topic:

I think that 288bhp with a std ecu is very good, infact I would say it is quite incredible.
However in one of Bobcat's earlier posts he quotes Marco Asterplock as saying that the transmission losses should be 10 - 12 % if thats the case this T5R only has 267 bhp at the flywheel based on 238 bhp at the wheels. So who is right Power Engineering or Marco MTE ?

Regards,
Hamish.

[bobcat]

So PE have used 17% tranny loss in this case.

what figure do you use hamish? and what figures for tranny loss were used for the rica figures.

Bobcat,

I was just wondering who in your opinion is most likely to be correct, P.E. or MTE. You speak very highly of both. Is it possible that they are both right ?

Regards,
Hamish.

[bobcat]

Originally Posted by hamish

Bobcat,

I was just wondering who in your opinion is most likely to be correct, P.E. or MTE. You speak very highly of both. Is it possible that they are both right ?

Regards,
Hamish.

Im with marco on this one (this will become apparent later),

what do you reckon?

but aslong as P.E stay consistant then we can compare julies figure to other tme and rica'ed cars that have been tested at P.E such as dan f's c70 with vvt that made less bhp with a rica ecu and catback.

[Dan F]

Originally Posted by bobcat

Im with marco on this one (this will become apparent later),

what do you reckon?

but aslong as P.E stay consistant then we can compare julies figure to other tme and rica'ed cars that have been tested at P.E such as dan f's c70 with vvt that made less bhp with a rica ecu and catback.

Don't forget that the smaller turbo too.....

[bobcat]

Originally Posted by Dan F

Don't forget that the smaller turbo too.....

cant use that as a reason dan, Ive had discussions with vt before and they imply that no more power is achievable from the 18t over the 16t. even rica indicate this as the s70r manual makes 310 "rica corrected" bhp from an 18t and a normal s70 t5 makes the same with a 16t. - and i 100% believe rica's claims.

Originally Posted by bobcat

Im with marco on this one (this will become apparent later),

Bobcat,

Are you implying that P.E. dyno is not correct ?

Regards,
Hamish.

[sholtby]

I'm interested in this 'top secret' mod that Stuart can do. The ecu is described as standard however MissD's car is running 1.3 bar boost. We also know that a MBC valve isnt being used. I doubt an EBC is used as Stuart claims he can fit a new turbo and give these gains for less than a Rica chip. How much is a Rica chip these days Hamish?
Anyone got any ideas how these cars are being modified?

Simon

[bobcat]

Originally Posted by hamish

Bobcat,

Are you implying that P.E. dyno is not correct ?

Regards,
Hamish.

dyno's give whp, i thought you would have known that hamish!!

dyno operators give estimated crank figures as this is what customers prefer. And this figure is often from an assumed tranny loss figure, it can also be measured. so on a dyno a crank figure can really be treated as accurate as to many factors are at play.

but if you noticed hamish, julie posted her whp figures.

but lets just say i believe that marco and pe tranny loss figures are a lot lower than the ones that i seen vt use.

for those people not sure what tranny loses have to do with a dyno result and why the value used is important here goes, the dyno measures the power at the wheels. the forumla is as follows:

bhp (engine power) - transmission loss = whp (wheel power)

you can measure whp, so you assume a value of "transmission loss" and this allows you to work out crank power.

so as you can see, if you use a high transmission loss you can give the customer a nice crank figure which makes them happy!!!

so thats why its best to quote whp to people as this is whats measured and no guess work!!!

now i answered your question directly, will you answer mine:

what figures do you typically use for tranny loss?

[Shestica]

Originally Posted by sholtby

I'm interested in this 'top secret' mod that Stuart can do. The ecu is described as standard however MissD's car is running 1.3 bar boost. We also know that a MBC valve isnt being used. I doubt an EBC is used as Stuart claims he can fit a new turbo and give these gains for less than a Rica chip. How much is a Rica chip these days Hamish?
Anyone got any ideas how these cars are being modified?

Simon

As we all are Sholtby

Stuart, as you have been good enough to answer many questions on this thread perhaps you could explain why MissD's car is not suffering from the overboost shut off that so many of us have had in the past using MBC's etc.

I know when i ran an MBC on my first S70 the ecu would stop the engine instantly when i went anywhere near 1 bar of boost, it was quite a violent shut off aswel. Everyone that uses an MBC really finds the limit at 13PSI ish.

So how do your modifications work around this problem ?

Thanks