pc5 Tuning results stock w Graves vs custom - Yamaha R3 Forum
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post #1 of 4 Old 06-08-2019, 06:49 PM Thread Starter
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pc5 Tuning results stock w Graves vs custom

stock bike w Graves system (without dbkiller)


green = Graves exh system and no retuning


blue = same bike, same day and FUEL retuned


red = same bike, same day and IGN retuned (and fuel retrimmed)


The HP is in the lower reading TRUE HP scale. The 37.2 true number = about 42 dynojet when you add in their inflation factor.


The ign timing was significant.
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Last edited by MarcSalvisberg; 06-09-2019 at 05:39 PM.
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post #2 of 4 Old 06-09-2019, 03:00 AM
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Thank you, again direct comparisons, which everyone can understand.
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post #3 of 4 Old Today, 09:50 AM
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Quote:
Originally Posted by MarcSalvisberg View Post
stock bike w Graves system (without dbkiller)


green = Graves exh system and no retuning


blue = same bike, same day and FUEL retuned


red = same bike, same day and IGN retuned (and fuel retrimmed)


The HP is in the lower reading TRUE HP scale. The 37.2 true number = about 42 dynojet when you add in their inflation factor.


The ign timing was significant.
Put the DB killer back in. It runs much better that way

Sent from my SM-G930V using Tapatalk
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post #4 of 4 Old Today, 12:12 PM Thread Starter
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Lightbulb

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Quote:
Originally Posted by bbsteinnewyork View Post
Put the DB killer back in. It runs much better that way

Sent from my SM-G930V using Tapatalk
Looks like you guys have determined that.

I wasn't tasked with testing exh configurations, so, it may or may not have had the db killer installed.

FWIW, if the bike makes better power / a restricted outlet, that means that the pipe length isn't right and/or there's too much exhaust cam.

It was the same deal as a 89-90 fzr400 and a Yosh exhaust system - the bike made 1.5 to 2 hp more with the street baffle as compared to the "race" baffle.

Marc Salvisberg
Factory Pro Tuning
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