88 CI to 98 CI UPGRADE

I could have misunderstood what he said. I will get a hold of him and double check. Was going to wait till next month to get the jugs done which is coming u soon.

Ok, I did talk to my Indy and I got it straightened out. Of course he checked cfm at .500 and .600 lift and we are right about the same. I need to make a correction though, my cfm at .400-.450 lift was 251. At .600 we dropped just a tad to 248. I asked that we stop there. I will live that and it is so little, I will never feel it. All in all, we are moving right a long.

factory head at its best will flow 196 at 550 lift . cnc se head at it best will flow 254 cfm at 550 and there is great room for better valves and flow left in them . so not to shabby!

yeah I wasn't wrong with I originally posted about my numbers, he just never did tell me what the .500-.600 lift flow data was. I will get a chart when it is all said and done and I will post that.

Today I got a message from my Indy and he has gotten the heads cc'd and he told me that they are ccing out at 83. I am contemplating on having him shave the head enough to where the heads would cc out at 80. I checked out Big Boyz's calculator and if I did go to 80 cc, I would have about 202 ccp with a corrected of 10.0:1. I think that I am going to have him take enough off just to clean up the surface of the head and call it good. I may wind up with a head that cc's out at 82.

I decided to stay put and leave the chambers at 83 since that is what the measured without any work done. I will have him clean the surface up and that is it. For some reason I am not too worried about detonation, but am aware that I may have some if she gets hot. I am going to use the +4 key. My approximate corrected compression will be about 9.9:1 with about 199 ccp.

I took a look at the intake port and he put a pretty nice texture on them as well as the intake. The intake was port matched as well.

I have the flow numbers from when the head was flowed in its stock form. Will post soon.

not too worried huh:roflmao:

Yep....I'm no engine builder by a long shot,but 9.9:1 corrected seems a bit high to me....I was shooting for 9:1 corrected and 180-185lbs compression in mine,I figured that would give me a good safe touring bike,with good snap and be reliable...pinging/detonation make me cringe....

Here's an article from Hot Bike might be worth a read...down the page a bit, they talk about corrected compression....

http://www.hotbikeweb.com/tech/0710_hbkp_harley_davidson_optimal_engine_efficiency/viewall.html

A lot of this has had me thinking about the EZ start S&S cams if I ever do a cam in my bike.

Here are the charts that I was given of what my heads are doing.

you better check your math,.9.9-1 corrected with the 557 redshift cam would mean your running almost 11.0-1 static & will give almost 210 CCP

Man I hope he had compression release stuck in. And I mean the Big kind ..

ya i did the same thing when i was checking his math ! check it with a dome volume at 6cc and 1600 ft above sea level 198 199

even with that factored in,there better be compression releases installed and a VERY good tune (whatever altitude,thats pushing the 557`s a bit,IMO)

****t you came up with better numbers then me when i first did the math i think i was at 222 then i re did the math and was at 213 then i put in the 1600 ft above sea level and the 6 cc dome per piston . it gonna rip ass on the bottom but hes gonna have to shift in the hot summer . tune is the key word !

my deuce was 10.5.1 200 ccp 1 full revolution delay on the sert map it started fine with no compression releases. it all in the tune cb you know that . could i have used them ofcourse i could have did i need them na! good batt and a stock starter it al good . and good grounds !

Actually. since I most likely won't be using my +4 key, my ccp will be about 195. And with compression releases too. Boy am I glad that I thought of those a long time ago...