Curborough sprint day 2015

[STR_Strat]

Does anyone require any Polo shirts, jackets, tee-shirts or rugby shirts? if so what size and i shall try to bring along your sizes.
Thank you

Hi Carol,

A white Polo in medium please for me.

Thanks

Dave

[carol]

David Waiting for the order to arrive, shall chase it up to-morrow,
Refreshments, we will be bringing along a stove to boil water for brews, if you wish to join in , bring along your mugs.
Regards John & Carol

[turbonutter]

Mapping session went well today, no big power numbers to impress anyone, but a good safe 475bhp.
Also with all the logging I have , it looks like we have found the big contributing factor to the previous problems.....



See he's you at curborough ��

[Bernard]

"it looks like we have found the big contributing factor to the previous problems.....".................

And they were ??

Also where was the rolling road you used ?

Cheers

Phil

[turbonutter]

"it looks like we have found the big contributing factor to the previous problems.....".................

And they were ??

Also where was the rolling road you used ?


Cheers

Phil

As we know the dreaded DET is caused by either toom much ignition timing or heat, or a combination of both, & my Haltech map had very little temp compensation until it was too late.

Looking at the Logging data from my ECU, it is clear that at 0.9 bar the exhaust pressure is above the Boost pressure, which during overlap allows the Exhaust to flow back to the cylinder increasing the cylinder temp & reducing the amount of new mixture in the cylinder... It would only get worse as the boost rose further. This would also explain why the fuel map on the haltech was "strange" over 1bar.

So for now I am sticking to 0.9bar boos as a maximum, to keep things safe... Its still got 475BHP, which is enough for now.....

That rolling road was at Ric Wood Motorsport in Stockport.

[The Slug]

Looking good for Thursday, and the weather should be good as well.

[strat24v]

So Neil, does that mean having a shorter, straighter and bigger bore exhaust?

[turbonutter]

So Neil, does that mean having a shorter, straighter and bigger bore exhaust?

No a less restrictive turbo exhaust housing, but that gives more lag, so maybe to get more power I need a smaller turbo (compressor side) with a bigger turbine housing..... I need to do a lot of investigation on this one!

[strat24v]

The joys of development. Seems what one gains on the swings, one loses on the roundabout. Keep at it!

[turbonutter]

Real fun isn't it !

talking to Ric wood (cnc heads) at the dyno yesterday he had a similar issue on his 1200bhp 1200lbft skyline engine. He used the recommended turbos, but just couldn't control them - he ended up using a turbo 2 sizes smaller and still made the same figures.

talking to him together with my tuner, the goal will be a smaller turbo which we want to be making decent boost by 2000 rpm and one that will not choke the engine at over 500 bhp..... Apparently with today's technology it should be possible. It's a case of seeing what is available and hopefully there is something that will fit with my v band flanges!