HWB Posted November 22, 2022 Posted November 22, 2022 Engine specs: 1127 barrels, ported 748 D ot head with flush valve guides, cams set at 105° 105° Rs 38s with 55mm velocity stacks, yosh full system. Today i installed a dyna 2000 on and was wondering what degrees do you guys run ? I set it at 36° and on advance curve 2, rpm limiter at 10.5k might set it a bit higher tho. I only started the bike for like 20 seconds and called it a day, i did realise the rpms were quite high so i dont know if the advance made the rise or if i should check other causes ANYWAY.... can anyone tell me whats the stock rotor have as for degrees so i can set a baseline ? Is the stock rotor 40° or what. And also what do you recommend concerning degrees and curves. I know a dyno is the best most accurate solution here but its just not possible for the moment. Cheers and thanks for any help Quote
rodneya Posted November 23, 2022 Posted November 23, 2022 The 1127 manual I have only mentions 13 deg btdc below 1500rpm For a 1052 motor the timing is 13 deg btdc below 1500rpm and 35 deg btdc above 2350rpm Quote
Gixer1460 Posted November 23, 2022 Posted November 23, 2022 And although 'ballpark', don't trust the timing marks for accuracy! Only way to reliably check is with degree wheel and / or timing light (although with a GSXR, that is a bloody messy operation!) I've never found any advantage of using anything other than curve #1 and timing total set anything between 36 - 40 degrees. If you have the 2000i version you could try putting a timing 'bump' in the mid-range / cruise area of 40 - 45 degrees then back off to around 36 deg for WOT. This is a profile often used with mapped ignitions to improve the burn around peak torque. 1 Quote
HWB Posted November 27, 2022 Author Posted November 27, 2022 Gix, you think on my setup 40 deg is ok or much ? I reckon ur setup has hi comp if u run 40 and ur good means its kinda safe ? Quote
Gixer1460 Posted November 27, 2022 Posted November 27, 2022 36 - 40 is relatively safe although I haven't tried that with 'modern' E5 and E10 fuels! I was running those numbers with a 1186 kit @ 12.5:1 CR that only pinked on one local hill during summer - that same engine with a spacer plate + turbo was used with same timing and leaded fuel . . . . 40 degrees and 10psi boost ! ! ! Quote
HWB Posted November 30, 2022 Author Posted November 30, 2022 So what fuel are you using ? Race fuel ? Quote
Gixer1460 Posted November 30, 2022 Posted November 30, 2022 4 hours ago, HWB said: So what fuel are you using ? Race fuel ? God knows - that was 20+ years ago so more than likely 4* (if you can remember that?) It certainly wasn't often or intentional, but useful in a head to head race. Quote
Lachie04 Posted December 2, 2022 Posted December 2, 2022 (edited) I have a Dyna 2000 and set it the same as you iirc manual says to set@36-35 Anyhow the second time I set it up on a different tacho found the read revs were doubled not sure what was going on there so ended up taking a feed straight from coil to the tacho which sorted the double rev reading Edited December 2, 2022 by Lachie04 Quote
rodneya Posted December 3, 2022 Posted December 3, 2022 4 hours ago, Lachie04 said: I have a Dyna 2000 and set it the same as you iirc manual says to set@36-35 Anyhow the second time I set it up on a different tacho found the read revs were doubled not sure what was going on there so ended up taking a feed straight from coil to the tacho which sorted the double rev reading The Dyna 2000 has two different colour tach takeoff wires for different tach ratios.. The one will read double what the other reads. Quote
Lachie04 Posted December 3, 2022 Posted December 3, 2022 3 hours ago, rodneya said: The Dyna 2000 has two different colour tach takeoff wires for different tach ratios.. The one will read double what the other reads. Yep that's right idk what the issue was with mine though Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.