alright guys, heres the deal. my motors been broken in for about 800 miles now and i decided to test it for the first time (un-tuned). btw, its a 95 gsr running dsm450cc's, t3/t04e custom drag settup with 3"dp straight through 3" n1 muffler, ngk bkr7e sparks gapped right, vafc hack, chipped ecu, with nos inline fuel pump, aem fpr, je pistons & rings (honed)/stock rods, new oem rebuilt gsr head and no boost controller. well i was looping down the freeway entrance ramp and punched to about 6krpm on first gear when i heard a loud backfire noise from the end of my exhaust and slowly shifted to higher gears driving normal on the freeway. what could have been the problem?? also, its running rich. hrmmms... i think its time to dyno tune too.

 

you answered your own question at the end.

 

 

Did you reduce the distance of the contacts of the NGK's ? I got the same problem until I reduced it to 0,8mm.

 

"and i decided to test it for the first time (un-tuned)"

tune your ride!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tslex &raquo;</TD></TR><TR><TD CLASS="quote">Did you reduce the distance of the contacts of the NGK's ? I got the same problem until I reduced it to 0,8mm. </TD></TR></TABLE>

reducing the contacts of the plugs took away ur back fire problem? hmm...i may have to try that.

 

Why are you running a hack when you have a chipped ecu? I guarantee you could to take an uberdata basemap to redline with no issues.

 

I wouldn't. Depending on who made the UberJuber basemap, how many brain cells they had active during making it, how conservative they made it, how the plugs are gapped and various other factors beyond our understanding and control, I'd say your comment re: Uberdata baseline is totally off base.

 

i guess to make things easier, i'll just pay to have it dyno tuned. save me the troubles n hassles of not knowing. but thanks for the help!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blundar &raquo;</TD></TR><TR><TD CLASS="quote">I wouldn't. Depending on who made the UberJuber basemap, how many brain cells they had active during making it, how conservative they made it, how the plugs are gapped and various other factors beyond our understanding and control, I'd say your comment re: Uberdata baseline is totally off base.</TD></TR></TABLE>

A rich basemap with some timing pulled out made by a person with many brain cells. How's that?

 

are you catless?

 

how big was the flame? haha...

 

haha i have a high flow cat on.. so no flames... but it woulda've been nice.. haha