Valin Posted August 30, 2009 Report Posted August 30, 2009 Well, the crank on the bike I picked up is pooched, so I'm going to go with a 4mm stroker 115mm crank and am going to run a base spacer plate. I am wondering if anyone can give me some porting specs for this setup for a trail to dune setup. We're going to run the numbers in the TSR software, but would also like some input since we have never ported cylinder reed cylinders before. Setup specs: 65mm bore Toomey T5's 33mm Mikuni Flatslides V-Force 3's K&N Filters with outerwears 4 deg. timing pump fuel - 91 octane coolhead - 21cc domes Thanks in advance guys. Just PM me if you don't want to post in here. Quote
mopar1rules Posted August 31, 2009 Report Posted August 31, 2009 valin, i don't know if you will be able to get away w/91 octane, on 65mm bore, 21cc domes, and +4 timing, as i believe i was getting a little deto w/93, 65mm bore, and 21.5cc (or so) domes. you have TSR? Quote
Valin Posted August 31, 2009 Author Report Posted August 31, 2009 valin, i don't know if you will be able to get away w/91 octane, on 65mm bore, 21cc domes, and +4 timing, as i believe i was getting a little deto w/93, 65mm bore, and 21.5cc (or so) domes. you have TSR? A very good friend does. It seems like most guys are running 21cc domes on pump fuel with that timing. I've even seen guys on here claiming they're running 20's on pump fuel with 4 deg. of timing. I'll figure out the head volume and timing I get it running. Quote
00tbanshee Posted August 31, 2009 Report Posted August 31, 2009 A very good friend does. It seems like most guys are running 21cc domes on pump fuel with that timing. I've even seen guys on here claiming they're running 20's on pump fuel with 4 deg. of timing. I'll figure out the head volume and timing I get it running. don't take this the wrong way, but the really good builders out there are not going to give you any specs.maybe i'm wrong.from experience,i would ditch the plate and have the domes in the head cut to make up the difference Quote
Valin Posted August 31, 2009 Author Report Posted August 31, 2009 don't take this the wrong way, but the really good builders out there are not going to give you any specs.maybe i'm wrong.from experience,i would ditch the plate and have the domes in the head cut to make up the difference I know the builders are not going to give away their specs, so I am hoping that somebody who has had cylinders done, or has measured cylinders previously will lend a helping hand. As for the domes, I can do it either way. I just figured it would be easier with the plate instead of cutting domes that could then no longer be run on a non stroker. Quote
blowit Posted August 31, 2009 Report Posted August 31, 2009 I know the builders are not going to give away their specs, so I am hoping that somebody who has had cylinders done, or has measured cylinders previously will lend a helping hand. As for the domes, I can do it either way. I just figured it would be easier with the plate instead of cutting domes that could then no longer be run on a non stroker. You say that like you would ever go back to a stock stroke...... No chance of that .lol You will find out with your software where you need to be with your setup. I think if you are headed to a 4 mil, you should consider a better fuel. There is plenty of extra performance with better fuels. Brandon Quote
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