I know, it's corny, but it's winter and even in Florida we're having withdrawal.

So, we got ONE day this week when they weren't sprayin' oranges and strawberries with water to try and insulate them from the cold. It was cold this morning, but it got up to the high-60s to low-70 this afternoon. I figured that would make a nice ride home today. But...

I have the bike on a tender, but when I hit the button, it cranked REAL SLOOOOOW. Like I said, it was cold -- I took the truck to work. When I got home, I went right to the shed and tried crankin' the ol' gurl over. It cranked just like normal (like I said, it was warmer) and fired right up.

You may remember that I recently had my indy do an upgrade to a FM 95 ci kit with Woods 222 cams. I'm still lovin' it, but it has always cranked harder. I've attributed that to the higher 9.75 compression. In speaking with the folks at FuelMoto, the 9.75:1 kit was recommended since I wouldn't need to send out my heads for comp releases. Even so, it has always struggled much more than it used to whenever I start it. I'm lovin' what that added compression is doing for my complexion, but i was just surprised how much more my starter is feelin' it too.

So, I was going to do a cranking compression test, but found out that I don't have the M12x1.25 adapter. One is on the way. But, I figured I'd toss the question out there and see if you would like to take a guess at how much squeeze is going on under those twin-cam covers.

Here's the info on the kit used on my 2004 TC88:

• Fuel Moto 95" SP Cylinder / Piston Kit (FM95-0611) (9.75 compression - Slightly lower compression eliminates the need for manual compression releases).
• Wood Performance TW-222-1 Chain Drive Camshafts (TW-222-1) - Works best at 9.75 compression - Does not require a different valve spring like the TW-555-6R and makes 10-15 more Torque under 3000 RPM than the TW-6R - Because it is stronger in the lower RPM, it will work better with your dual exhaust
• Feuling OE+ Hydraulic Cam Kit 01-06 Twin Cam Engines Factory Style (7090) - will utilize a standard, not a conversion cam - (More cam options in the future if you want to go bigger or change this up - only a handful of conversion cams vs hundreds of standard cams.

So, what say you? Got an idea what the final compression numbers will be? I should have the adapter in a day or so, and I'll update with what I find on the gauge. Happy guessing!

 

I'd say 190 psi.. If you didn't clean the carbon out of the heads, 200 psi.

 

175-180 psi. Throttle wide open, cold cranking.

 

189.9999

We celebrating up here in north country cause the temp cracked 20 degrees for the 1st time in a month.

 

I’ll go with 175-180. I’m kinda surprised FM said you may need compression releases over 9.75:1… is that corrected or mechanical compression? I’ve never really understood everybody freakin out adding compression releases and big starters… I turned 5” stroked 13:1 motors over with stock prestolite starters and an AGM battery from Harley… never an issue. My 93 inch Shovel is almost 12:1 and it currently uses a stock 1994 softail starter and an AMG battery. The trick was mostly in timing and big clean cable connections.

My little 93 inch shovel consistently shows 230 cranking compression. 590 lift 210 seat, 264 duration

 

Agree with Rains2much on the CCP; maybe the OP needs a battery? Just because it's on a tender doesn't mean much.

 

Not only that but you may have a typhoid mary charger..

BTW Being a softail. it has a battery smaller than a bagger.. The smaller AGM likely drys out faster.

 

 

Everybody needs one of these...

 

Always a possibility. I did go out and it fired right up. But, definitely something I'll be looking at.

LoL...
I figured someone would do that!
And, is that chick to your right flippin' us off?