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#1
11-13-2016, 03:29 PM
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Squish band grooves
Has anyone had their head modded similar to the attached images? Seems a few reputable tuners do it. I suffered a bit of pre ignition with running my compression ratio so high (13.6:1) so am considering a diy job.
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2006 EC300 Enduro - Ignitech CDI - 38/NECW#2/165 FMF gnarly, FMF shorty, .50 front 5.7 rear 2016 RM-Z450 
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#2
11-13-2016, 10:33 PM
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I've never seen that. What's it supposed to do? Increase atomization? It would cut compression a little I suppose.
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2013 GasGas XC300E 2005 YZ290 1973 Honda CB175 1997 KX60 1983 Yami Tri-Zinger 1984 Suzuki Alt 50 1969 Trail 90 1971 Trail 90 1972 Trail 90
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#3
11-13-2016, 11:44 PM
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Hahahaha. No `reputable` tuners do that.
Everyone is looking for a gimmick that can be CNCd. They do rifled spiral grooves and holes drilled from the squish to the chamber. All that sort of stuff just increases trapped gas in a pposition it can't burn and decreases the squish effect. If you want more turbulence or max squish velocity you can do that with size of squish area and clearance. Too much isn't good anyhow.
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'07 EC300 GG '14 TXT250 GG '? 496 CPI Cheetah RZ/RGV hybrid '22 765 Street Triple RS '21 XTrainer '69 Stinger T125 Suzuki '23 TRS 250RR (it's a Trials thing)
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#4
11-14-2016, 07:13 AM
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The urge to delve into the unknown was too great... Each groove is angled directly at the spark gap
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2006 EC300 Enduro - Ignitech CDI - 38/NECW#2/165 FMF gnarly, FMF shorty, .50 front 5.7 rear 2016 RM-Z450
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#5
11-14-2016, 07:29 AM
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I don't know how dicks racing managed to make his look so bad on http://www.dicksracing.com/motorcycl...roke_carb_mods
But mxa magazine tested a bike fitted with it in 2014 and loved it
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2006 EC300 Enduro - Ignitech CDI - 38/NECW#2/165 FMF gnarly, FMF shorty, .50 front 5.7 rear 2016 RM-Z450 Last edited by motopsycho87; 11-14-2016 at 10:53 AM.
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#6
11-14-2016, 11:02 AM
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Seems to start and idle well, couldn't be bothered to drain the paraffin mixed with red diesel out after measuring the volume, so my shed looks like this. Pretty much band on 12:1 now. I like pushing the boundaries, but if I can't ride in the woods without detonation then what's the point of the bike
 ...
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2006 EC300 Enduro - Ignitech CDI - 38/NECW#2/165 FMF gnarly, FMF shorty, .50 front 5.7 rear 2016 RM-Z450
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#7
11-14-2016, 12:14 PM
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Couple of in progress photos
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2006 EC300 Enduro - Ignitech CDI - 38/NECW#2/165 FMF gnarly, FMF shorty, .50 front 5.7 rear 2016 RM-Z450
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#8
11-15-2016, 04:01 AM
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Quote:
Mxa mag probably got some stickers to play with. Or decals in the us. Scuse my cynicism, seen this stuff all before.
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'07 EC300 GG '14 TXT250 GG '? 496 CPI Cheetah RZ/RGV hybrid '22 765 Street Triple RS '21 XTrainer '69 Stinger T125 Suzuki '23 TRS 250RR (it's a Trials thing)
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#9
11-15-2016, 11:08 AM
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Oh I'm skeptical too, the general consensus is more low down, less top end which seems to coincide with more squish velocity / turbulence. Apparently my mpg will go up also lol. Nothing to lose by doing it so might as well give it a try!
And it's to the plug on the up, and away from the plug on the down  I hope...
__________________
2006 EC300 Enduro - Ignitech CDI - 38/NECW#2/165 FMF gnarly, FMF shorty, .50 front 5.7 rear 2016 RM-Z450
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