mike454 Posted April 11, 2010 Report Share Posted April 11, 2010 hi ive got a 87 banshee with a 4 mill crank and big bore sleeves in stock cylinders 67.25 pistons with port and polish got 35mm carbs 140 jetting in them 12-42 gearing with 20/11/9 10 paddle tires and out of frame drag pipes and stock frame im running a 5.322 on motor ive got nitrous for it but i havnt sprayed it yet plan on putting a forty shot on it any help or advice would be greatly appreciated Quote Link to comment Share on other sites More sharing options...
VegasJeff Posted April 11, 2010 Report Share Posted April 11, 2010 I don't know crap about nitrous ,but 140 seems way lean. Quote Link to comment Share on other sites More sharing options...
shanYE west Posted April 11, 2010 Report Share Posted April 11, 2010 is this 300'? 1/8 mile? dirt asphalt? Need some more info here.. Quote Link to comment Share on other sites More sharing options...
dragbanshee98 Posted April 11, 2010 Report Share Posted April 11, 2010 if it is 300' then that time is kinda on the slow side. no offense. i have a 4 mill stock cylinder that runs 4.6's all motor. i know alot of people that can get similar motors runnin 4.2's with an override as well Quote Link to comment Share on other sites More sharing options...
tundish2800 Posted April 11, 2010 Report Share Posted April 11, 2010 Last year with inframes on alky stock cylinder 4mil i went 4.83. Its a stock frame with my 240lbs ass on it. This year i should below 4.4 with me on it. possibly 4.0 with a jockey Quote Link to comment Share on other sites More sharing options...
mike454 Posted April 12, 2010 Author Report Share Posted April 12, 2010 is this 300'? 1/8 mile? dirt asphalt? Need some more info here.. its the 300ft sand Quote Link to comment Share on other sites More sharing options...
mike454 Posted April 12, 2010 Author Report Share Posted April 12, 2010 if it is 300' then that time is kinda on the slow side. no offense. i have a 4 mill stock cylinder that runs 4.6's all motor. i know alot of people that can get similar motors runnin 4.2's with an override as well what degree of timing are you running and wut size domes? Quote Link to comment Share on other sites More sharing options...
Ieat4strokes Posted April 12, 2010 Report Share Posted April 12, 2010 I agree, somethings not right, I was running 5.0's on a stock cylinder, stock stroke, stock length bike, im 200 lbs..... Havent got to run my 4mill drag ported motor yet but I do know it should be a mid 4 sec bike. Yours as well if setup correctly. 140's do seem waaay lean...also wheres your timing and compression at? Quote Link to comment Share on other sites More sharing options...
shanYE west Posted April 12, 2010 Report Share Posted April 12, 2010 a 4mil on alky for 300' is in the 4.0 - 4.5 range depending on setup.. I've seen some run faster.. and some slower.. but this is the average range. Quote Link to comment Share on other sites More sharing options...
mike454 Posted April 12, 2010 Author Report Share Posted April 12, 2010 I agree, somethings not right, I was running 5.0's on a stock cylinder, stock stroke, stock length bike, im 200 lbs..... Havent got to run my 4mill drag ported motor yet but I do know it should be a mid 4 sec bike. Yours as well if setup correctly. 140's do seem waaay lean...also wheres your timing and compression at? the timing is still set on stock and the compression is around 120-130 ive dot the adjustable timing plate but dont know wut degree of timing to set it on i had it on there once an it would barely run at -4 degrees Quote Link to comment Share on other sites More sharing options...
gabybanshee Posted April 13, 2010 Report Share Posted April 13, 2010 your compression is lowwwww i have a 4mill with 19cc domes and i have 155 on each cylinder Quote Link to comment Share on other sites More sharing options...
Ieat4strokes Posted April 13, 2010 Report Share Posted April 13, 2010 the timing is still set on stock and the compression is around 120-130 ive dot the adjustable timing plate but dont know wut degree of timing to set it on i had it on there once an it would barely run at -4 degrees Ok well -4 timing is going the wrong way. You need to ADVANCE your timing. +4 is a good starting point but some members run as high as +6 or +7 in 300ft. Also may wanna talk to your builder about your compression, need to either freshen it up or get some domes cut that will bump your compression up. Maybe I missed it but with a 140 main I take it your on pump/race gas and not alky? Quote Link to comment Share on other sites More sharing options...
NVRBanshee Posted April 13, 2010 Report Share Posted April 13, 2010 i ran a 5.18 this weekend on stock stroke mild port 34mm carbs and 17cc domes Quote Link to comment Share on other sites More sharing options...
dragbanshee98 Posted April 13, 2010 Report Share Posted April 13, 2010 put some 18cc domes in it and put it on 110 octane or higher fuel, it will be worth the investment. turn timing up to +4. and lighten the S**t out of the frame. with my motor setup my bike is turning 220 lbs of compression per cylinder. when you kick my bike over, it kicks back haha. if i had more paddle under mine and a longer frame i could easily hit 4.4's Quote Link to comment Share on other sites More sharing options...
mike454 Posted April 13, 2010 Author Report Share Posted April 13, 2010 This is not an alky motor i run 110 octane gas just added 5 degree in timing seems to be running better but cant get any times till next month if anyone knows were i can go test at around mcalester, OK would help alot Quote Link to comment Share on other sites More sharing options...
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