Thread: Help Needed From Mappers / Tuners / Knowledgeable Engine People !
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Old Jun 12, 2008 | 11:41 AM
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From: Northwest
Default Help Needed From Mappers / Tuners / Knowledgeable Engine People !
I have a friend that has built a kit car and using the F20 Honda engine from a S2000. The engine has standard internals but has had throttle bodies and a Racetech ECU fitted.

The car has been ‘mapped’ (4 hours total on the rollers) and has just failed SVA on idle / fast idle emissions

The car has been back to the mapper / supplier for a further 7.5 hours for the owner to be informed that basically due to the engine / ecu combination the emissions can’t be corrected to suitable levels and the ecu does not have such mapping facilities. Note that the mapper / supplier was fully aware of the spec / application of the engine / car etc from the start of the project

To be fair the mapper has offered to (at his expense, other than fuel) to spend a further 3 days on the car and an additional 3 days rewriting the ecu program which he ‘thinks’ will sort out the problems.

I am not after slagging the tuner so I won’t name and shame etc (I don’t even now who it is and haven’t asked my friend - so I can’t snitch anyway !) I am after sensible / technical input on the following :
  • Is the Racetech ECU a good enough piece of kit suitable for a modified’ road going’ car ?
  • Is it possible to map aftermarket throttle bodies for good low down (SVA passable) emissions ?
  • Is the Honda F20 a pig of an engine to map normally or just when on throttle bodies ?

Thanks in advance for all sensible input.

WD
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