MS wont let me rev above 6K

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isaacson06
MegaSquirt Newbie
Posts: 33
Joined: Thu Nov 24, 2011 7:28 pm

MS wont let me rev above 6K

Post by isaacson06 »

i have the settings set to 9000K but after tuning the driving part now im trying to tune WOT and cant get above 6K even if i free rev just sitting there it hits a rev limit of 6k. Ive tried messing with timing seeing if that would help and got no change is there anything i have to change in MS to run boost?? other then that it runs great drives ok still need to do alot of tuning. Any help would be great thanks

Setup
81 yamaha XJ650 stock engine 9:0:1 comp engine
03 gsxr TB 240cc injectors
GM-3-bar map sensor tied into all 4 cy
GM-coolant temp and iat sensors
homemade turbo setup
MS-v3
quadspark
36-1 trigger wheel with one stock vr sensor
420a neon coil in wastespark

MSQ and datalogg is here
Attachments
XJ650turbo.msq
(27.43 KiB) Downloaded 40 times
rev-problem.msl
(22.28 KiB) Downloaded 34 times
isaacson06
MegaSquirt Newbie
Posts: 33
Joined: Thu Nov 24, 2011 7:28 pm

Re: MS wont let me rev above 6K

Post by isaacson06 »

only reason the rpms drop out are caused by the fuel cut if i was to just hold it there lite throttle i could lightly bounce it there but i just cracked it wot.
Matt Cramer
Super Squirter
Posts: 910
Joined: Sat Jul 03, 2004 11:35 am

Re: MS wont let me rev above 6K

Post by Matt Cramer »

Try a 5K or 10K resistor across the terminals of the VR sensor. We've found this essential on the 60-2/VR sensor combo and it may also be needed on other relatively high tooth count wheels.
Matt Cramer at DIY Autotune
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isaacson06
MegaSquirt Newbie
Posts: 33
Joined: Thu Nov 24, 2011 7:28 pm

Re: MS wont let me rev above 6K

Post by isaacson06 »

So just grab a 5k or 10k resister and put it on the + and - wire right ? I read somewhere of doing this
isaacson06
MegaSquirt Newbie
Posts: 33
Joined: Thu Nov 24, 2011 7:28 pm

Re: MS wont let me rev above 6K

Post by isaacson06 »

Did the resistor and no go well I thought I would try adjusting the air gap and that ended up being the problem thanks for your help
Rwilner
MegaSquirt Newbie
Posts: 21
Joined: Sun Oct 30, 2011 3:25 pm

Re: MS wont let me rev above 6K

Post by Rwilner »

Did increasing or decreasing the air gap solve the problem?
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