Mohawk

OK, did an amp check on a spare battery. CBR CoP units draw 7.5amp. Original coils draw 3.9amp. These are COLD figures, the CoP units resistance goes up with Temperature. Your choice, works fine for me ;)

Well I remembered to test the coils resistance last night, the CBR1000 (2007 model) CoP units register 1.5ohm, the original VFR coils show 3ohm. A previous HOT resistance check on the CBR CoP showed 2.5ohm, so I'm happy. I'll try to do an AMP test tomorrow, won't have time today.

I think the GSXR 600/750 & poss 1000's are all the same, as the engines are practically the same. I used CBR ones, beacuse they were available cheap at the time I was looking. GSXR ones would probably be better as they are a little shorter. I had to add a couple of O-rings to my CBR ones to centralise them in the hole & seal it against water/dirt entry ! Strange I was a Bristol Flyer courier in 87/88 then had an acciden that put me out :( Best job I ever had, people think I'm nuts but nothing I've done since was that enjoyable !

The plugs have no bearing on the use of CoP, but you asked which plugs I use !

I use NGK iridium plugs on all my bikes, never change them, I've never had a set wear out :) Just clean & check them when I do valve adjsutments.

I think you guys are reading too much into this. Coils are really simple, they don't draw hardly any ampage, just look at the length & diameter of the cables from the ECU which only acts as a trigger unit to collapse the Low tension field to generate the HT field. Coils DON'T use much juice. The resistance of a coil is directly related to the amount of power it requires, the newer ECU's are even smaller than the old tech VFR one & they use the same grade wiring for their CoP units. In theory a 3ohm resistance should draw 4amp & 1.5ohm 8amp, but when i tested the original coil it only used 2amps. I'll test one of each on Monday evening to see what they register.

Pic of working rear ones & test fit of front

About a thousand miles with the 2 rear cylinders running the CoP.

Oh and another thing re the CoP issue. I tested the ones I've used & if memory serves the resistance was about 3ohm of the orginals & only 1.5 on the CoP, so I ran the rear two, then had a brain wave, that resistance increases with Temperature, so got everything ready to test the rear CoP with the bike hot, remember that CoP sits in the plug tunnel surrounded by HOT metal. It took about 2-3 minutes to stop bike get off, get meter & attach whilst trying not to burn myself & the resistance hot was 2.5 so close enough in my opinion & has been running great since !

he he he, are you forgetting that in a V engine the conrod big ends share a crank pin & thus when one is at TDC, the other can't be. On a VFR cyclinder #1 is the rear left & it shares a crank pin with Cyl#2, which is spaced 90degrees futher on,so can't possibly be at TDC at the same time. Plus remember that each piston requires 720degree between firings. The best you could do with a V4/180 crank engine is this, 1-2-3-4 all 90degrees apart, then have a 450degree freewheel cycle or a very rough running engine, or need a VERY big flywheel to carry it over that hump ! You could twin up a 360 crank, with 1+3 then 2+4 90 degrees later, followed by a 450 degree freewheel cycle, again a very rough engine with huge pulse power delivery, which would in theory require larger bearings & shafts to deal with the extra grunt. OK in a race engine maybe, but not a road bike, if you want to keep your teeth :) The screamer engine or as close as you can get with a V4 works by using some of the power stroke of one piston to power the compression stroke of another, this allows the crank webs (flywheel). The V4/360 big bang would have to rely on flywheel momentum to force two full & two half comp cylinders to TDC on compression with the second two only 90degrees behind the first, that would require a lot of weight in the flywheel to carry that through TDC's for both banks.

I've added CBR1000RR CoPs to my 5th Gen, 2-wire units, 2007 model I think, needs an O-ring to seal the plug tunnel & keep the the CoP from flapping about, but I ran the rear 2 for 3 months on CoP & the front on standard coils as a test, works fine. Will be adding the front 2 CoPs during my rebuild at the moment.

Oh forgot one thing, your EBD may be wrong about the oil cooler ! If as he asserts the oil flow is not great then an upside down cooler would crud up with contaminated oil, as the cooler is a sperate circuit to the pressure feed system & pumps oil straight from the sump to the cooler. By being this way up there is no dead space for old oil crud to collect. I think you will find there is easily enough flow to use all the galleries in the cooler. If you look at my second ramair solution, this increases flow to the cooler & I will add a baffle underneath between the cooler & the cylinder head cover when I put it back together, this will further increase airflow through the cooler due to the baffle causing higher air pressure in front of the cooler & lower air pressure behind it at the same time !

OK so what's happened to this project ? I'm in the middle of installing my own cams, awaiting shims at the mo, hope to have the bike back on the road next week & then dyno tuned for the new cams (assuming they work OK) with my PC3. Once I have a finished product to show, I'll release the cam info for others to follow if they so desire. Mine took 3 weeks to get, first order, new profile etc, any other orders would take a week ! Hey Larry, thanks for the pics of the RC45 airbox/bellmouths. Interesting that the 5th Gen has the SAME 40mm bellmouth entry to 36mm throttle bodies. I just hand lapped mine to match the throttle bodies as the ID at the base of the bellmouths was only 35mm & another set I have were only 38mm at the entry & 34mm at the base ! For RAMAIR inlet, you can see what I did last year here, it seems to make a difference at speed as the bike was still accerlerating hard at 140mph, which is as fast as i've taken it so far. http://vfrworld.com/forums/5th-generation-1998-2001/33383-vfr800-5th-gen-10-year-update-project.html Phase 2+3, will be written up in a couple of weeks time, to cover the upgrades/changes made during the past winter Chris W.