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R34 Gtt Ecu Remap (road Tuned) With Toshi - Results!

Wacky Dee

By Wacky Dee,
in Engines & Forced Induction

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Wacky Dee Veteran

Wacky Dee

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Graphs are below .. red line is stock ecu (which couldn't cope with anything more than 10psi boost) and blue is the new remapped ecu (and 11psi boost) after road tune with Toshi. Car has a turbo back exhaust (JJR front/dump and HKS Silent Power catback) and Greddy EBC, but is otherwise stock.

Can anyone suggest how to hold the boost steady ? As you can see in the 2nd photo it starts dropping from about 5200rpm (11psi) down to approx. 9psi at redline (7000rpm). I have a Greddy ProfecB Spec2 EBC (settings are, boost 55%, gain 15% and start boost '94' ie. 9.4psi)

I'm pretty happy with the new remapped ecu .. car feels more responsive in mid range and is obviously making about 15kw more power at the top end. It's obviously a SAFE tune, not too lean but leaner than stock. Toshi listened for pinging during road tune (microphone connected to the engine block, back to his headphones) and adjusted timing accordingly so theres no pinging. Cost was $500 which included the necessary ecu daughterboard etc

post-49910-1213515277_thumb.jpg

post-49910-1213515289_thumb.jpg

Edited by Delta Force
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Wacky Dee Veteran

Wacky Dee

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at redline? I'm not worried about redline .. boost seems to be steadily falling off from 5000rpm or so. According to the greddy manual, upping the 'gain' should fix boost that gets reduced as rpms increase.

But I'm not clear on one thing .. it also says that if you increase gain, your overall boost will automatically be higher. So am I right to think that if I increase gain by say 2 points, I should reduce boost 2 points, in order to regain 11psi ?

Wacky Dee Veteran

Wacky Dee

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Wooa :D Thats very impressive, Well done Toshi,

looks like my ex-ecu had secret powers after all :)

lol so that was your ecu hey ? Nice, I liiiike. My one was version 500 (first r34 gtt ecu) and yours was an updated revision v502 Thanks for the brain transplant!

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