Timing on a 10mill 535 cheetah

3799 Views 17 Replies 10 Participants Last post by camatv, Sep 8, 2009

kubitza123

Discussion Starter · Aug 31, 2009

Ok guys every1 knows what bike i have its a 535 10mill cheetah with 44 lectrons with bb oof shears and all the goodies you can stuff in it.

Its on Alky whats every1 think the timing should be set at? I'm running 1/8th mile and currently at +7.

What are the advantages that can be noticed if i run more timing or need more???
Anything to worry about when running more?

Went to the track with 19/37 gearing this weekend and never could get past the 6.3 mark at 103-104.

Previous weeks ran the same time running out of gearing 20 yds early with 19/40 gearing??

Was hoping to see faster times? I know i have the bike running fat now leaning it slowly just wonder if timing might be a problem? I weigh 200-205 as well. Hoping to get in the 5.8 area atleast on motor in time.

Possible clutch slipping slighty maybe? Nothing serious i can notice?

Any ideas would be great. Most 60fts were int he low 1.4 range when running a 6.3

Looking for ideas to get faster

1 - 18 of 18 Posts

bigboybanshee

· #2 · Aug 31, 2009

Having too much timing will cause issues with heat. Too much heat and you can run into a lean condition / detonation. Looking at your plugs now will determine whether you need more or less heat inside the cylinder.

Not sure what to tell you as far as picking up a better ET, the 6.3 is a pretty good number for a stock framed bike with 200+ lb rider. Maybe a new chassis or doing some really fine tuning on your existing chassis? Once you get the engine running its best, everything else revolves around rider/setup.

itschris

· #3 · Aug 31, 2009

I'm running +7 on mine, but I have 25cc domes and use 110 gas. That was pretty much the perfect spot for it, on the dyno. Plugs look great too. I'm not too familiar with how to dial in the Lectrons. But, with my PWK's I'm at 52/178/CGK, 3rd clip, 1 turn out on A/S. If you can figure out a way to convert that to how the Lectrons work, you should be close. I have a M&M drag port too. I don't know what porting you have.

Radar

· #4 · Aug 31, 2009

Kubitza if your fat now try leavin the timing where it is and tuning it till its not so rich. I bet your mph and et gets better.

tripledsracing

· #5 · Sep 1, 2009

QUOTE (Radar @ Aug 31 2009, 04:17 PM) index.php?act=findpost&pid=55043Kubitza if your fat now try leavin the timing where it is and tuning it till its not so rich. I bet your mph and et gets better.

i agree..but if u are way fat bump it to 8* and give it a try and check the plug..also you jumped 3 teeth on the gearing so maybe go 1 tooth at a time and that should help u out also...

Radar

· #6 · Sep 2, 2009

Yes you can bump your timing up Kubi and it will lean it out a bit without a carb change. I think I'd do a little more timing i know you are being conservative with it after rebuilding it recently but I know most alky bikes are safe with more than your 7 degrees only dragging one or two passes at a time and not hot lapping it.
To pull big gearing you'll want as much torque as you can get and timing will help that quite a bit. I dont even want to tell you where my bikes timing is set at.
You seem to be gearing your bike to run 125 mph isnt it with the big gear setup?

dajogejr

· #7 · Sep 2, 2009

I'd try both. But it at 9...make a pass.
Put it back at 7...take some fuel away.

camatv

· #8 · Sep 3, 2009

mccoy runs the pd plate maxed out on alky. bikes make a lot of power that way but will heat up..

i can tel ya. going from +4- +12 degree's on my 480 made a HUGE inprovement in the power..

i'm trying more timing now. i cant afford anything else so might as well play with the tuning more..

if your a track racer and have time to let the motor cool down crank it up!!...

REDLINE

· #9 · Sep 3, 2009

QUOTE (camatv @ Sep 2 2009, 08:09 PM) index.php?act=findpost&pid=55330mccoy runs the pd plate maxed out on alky.

WARNING: Nate sets his domes up right, meaning that not all motors will make it down the track without blowing a hole through the top of the piston with this kind of timing.

See less See more

richport4

· #10 · Sep 3, 2009

leave your bike at +7 turn the power jet out 3 full turns make a pass have someone at the ticket house to pull you back check your plugs by you living in waco, tx that should be fat so your plugs should be wet start closing them a 1/4 turn at a time until you see a burn mark half way around the base of the plug 9 o'clock and 3 o'clock so they say, now on your et you are not hooking you need to be around mid or low 1.2's work on your 60' and you will see a better et now on the gearing what tranny do you have with a 19/37 gearing you should be running a 1-5 hope that help you . (IF IT WAS ME I WOULD LEAVE THE TIMING ALONG)

dajogejr

· #11 · Sep 3, 2009

They're right...you'll hit a sweet spot in your timing.
I went from 9 to 12 and instantly lost a few MPH in 300 foot, it was the only adjustment I made.
More fuel didn't make a difference...

bubba297

· #12 · Sep 3, 2009

No offense here to anyone, but a low to mid 1.2 60ft time is not easy to obtain. I dont see it on a stock modded frame with a 535 motor only setup. Realisticly he should be in the mid to high 1.3 60ft range with the bike and his weight.

tripledsracing

· #13 · Sep 3, 2009

QUOTE (bubba297 @ Sep 3 2009, 07:37 AM) index.php?act=findpost&pid=55357No offense here to anyone, but a low to mid 1.2 60ft time is not easy to obtain. I dont see it on a stock modded frame with a 535 motor only setup. Realisticly he should be in the mid to high 1.3 60ft range with the bike and his weight.

i agree

kubitza123

Discussion Starter · #14 · Sep 4, 2009

Good input guys i'm going to lean the bike out and maybe step up the timing to a +8. Yes 1.2's 60fts are almost unheard of. I know a few doing it but very hard to pull off. I have a 1.40's and would like to get in the 1.32-1.35 area and i'll be happy. I know Angel and them on Planet sand running the 1.2's are very light riders and shooting big shot of NOS.

I'll let you know what happens next time i get out to the track . Id like to see 5.9's on motor and i'd be happy but we'll see will just take some time.

dajogejr

· #15 · Sep 4, 2009

I'm pretty sure the PR bikes running 1.2s on pavement have a small rider as well as a few hundred cc's on that Cheetah!
And as said...a boatload of NOS.

I think Wiseco sends them Christmas cards every year.....LOL.

richport4

· #16 · Sep 4, 2009

QUOTE (bubba297 @ Sep 3 2009, 06:37 AM) index.php?act=findpost&pid=55357No offense here to anyone, but a low to mid 1.2 60ft time is not easy to obtain. I dont see it on a stock modded frame with a 535 motor only setup. Realisticly he should be in the mid to high 1.3 60ft range with the bike and his weight.

i do it all day long but i wasn't think of his weight you are right 1.3's would be good for him i myself only weight 155 and i cut 1.25 to 1.28 all the time.

kubitza123

Discussion Starter · #17 · Sep 5, 2009

yeah the guys from PR are running lots of nos or the record holder bike is. But his motors not any bigger its just a 10mill t-rex so at its biggest might be a 78 bore? biggr but not much. Just alot in rider weight and i haven't gotten might near lean enough just yet. I would be happy with high 9's int he 1/4 and high 5's in the 1/8 on motor then with the NOS close to mid 5's and mid's 9's but like i said that takes time and perfecting the setup which the PR guys have perfected and hats off to them.

camatv

· #18 · Sep 8, 2009

i agree nate mccoy spends a lot of time on domes..

i dont have any nate domes yet.. but the 480 has a pretty big dome in it and i havent had an issue with the increase in timing. only more hp . its about a 52-55 clearance and around 165 comp dome pretty mild. i think about a 12mm band? but flat inner face cut. i went from +4 to +11 or 12..

oh and they are beat up pretty bad from a crank exploding a few years back..

1 - 18 of 18 Posts

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