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Old 11-21-2012, 08:43 PM   #856
Scooby Specialist
Member#: 856
Join Date: Feb 2000
Chapter/Region: International
Location: Cambridgeshire, England, UK
2005 JDM STi


Originally Posted by kayen View Post
That is some damn good Spool, overall looks pretty fantastic. Especially once you get your Top End back.
OK, did some more work on the mapping yesterday and also found why we lost power with increased boost.

The OEM dump valve wasn't sealing fully it appears, which would have been feeding hot air back into the turbo inlet. So we fitted a Forge recirculating dump valve and did another mapping session on the road.

It instantly picked up 0.25BAR and sharpened up the response even more, so after mapping the car and spending a bit of time fine tuning the cruise AFR's etc. now the pressure of time had gone for the sprints i was doing we have achieved the following.

Power of 473 BHP, Torque of 540 FtLb !

Power and Torque

Power and Boost

The engine knocked a bit of timing out at the top end on the rollers, it doesn't on the road. This is a road mapped car, there is no attempt to optimise the engine for the rollers. It looks like on the road it's producing 490 BHP

That'll do!

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johnfelstead is offline   Reply With Quote