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[Yellow09SERG]

Mine HD kit started with the front .009 in the hole ,back .010 . If you go to  http://www.bigboyzheadporting.com/TwinCamComp.htm and start doing the math with a .045 head gasket and piston in the hole .010 it ain't real pretty. These need compression to make decent  power.

On mine We zero decked the cyls., milled heads  .020 for 92 cc, cometic .030 gasket. 2.120 intake valve , SE 585 cams.  static CR  is 10.6-1  Corrected 9.96-1. 208 CCP. My goal  is 125 squared with a nice "warranty" motor  HD warrenty's that kit for 1 year if HD dealer does work. I have an outstanding wrench that really  knows the tuning side also..   

Be very interested in seeing how it turns out for you.
Finding very similar deck heights with mine. .008 rear and .010 front. Builds are similar except looking at 94cc to end up around 195 cc with the 24D cam. I really want to say at the middle of the compression range. 2up always and not beyond the possibility of getting in to an area where 89 could be all the choice there is and would like to be able to fill up and go. I'll take the loss of a few horse on paper for that lack of PMS

[Snakepit]

Mine HD kit started with the front .009 in the hole ,back .010 . If you go to  http://www.bigboyzheadporting.com/TwinCamComp.htm and start doing the math with a .045 head gasket and piston in the hole .010 it ain't real pretty. These need compression to make decent  power.

On mine We zero decked the cyls., milled heads  .020 for 92 cc, cometic .030 gasket. 2.120 intake valve , SE 585 cams.  static CR  is 10.6-1  Corrected 9.96-1. 208 CCP. My goal  is 125 squared with a nice "warranty" motor  HD warrenty's that kit for 1 year if HD dealer does work. I have an outstanding wrench that really  knows the tuning side also..   

Have you dyno'd the build yet? Why the SE585? thanks

[jackjr68]

Those that have the 117" kit installed, what kind of engine/cyl head temps are you seeing?  I was able to finally get out for a decent ride today on my 117" FXSE and the temp got up to around 280/290 before I stopped for gas and let her cool back down.  Seemed a little hard to start at first once it was hot, but then she fired right up and seemed fine.  I've just never remembered any of my bikes getting this hot before and I'm a bit concerned.. 

[Yellow09SERG]

Those that have the 117" kit installed, what kind of engine/cyl head temps are you seeing?  I was able to finally get out for a decent ride today on my 117" FXSE and the temp got up to around 280/290 before I stopped for gas and let her cool back down.  Seemed a little hard to start at first once it was hot, but then she fired right up and seemed fine.  I've just never remembered any of my bikes getting this hot before and I'm a bit concerned..

Hard to start as in turning it over or actually starting?

Not back together so not sure on temperatures but tune will effect it a lot

[jackjr68]

Hard to start as in turning it over or actually starting?

Not back together so not sure on temperatures but tune will effect it a lot

Seemed hard to turn over really.  Once I let it cool to ~250 or so it started up fairly easy.  Now that I think about it, I've noticed that when starting up it seems to fight the compression a bit, but I assumed that was from sitting the past two months and the cold in the garage.   Or it could also be an ACR issue.   

I should also note that I'm running a canned map from fuelmoto loaded from my PowerVision at the moment.  Winter hasn't afforded me the time to get any tuning in. 

[Yellow09SERG]

Seemed hard to turn over really.  Once I let it cool to ~250 or so it started up fairly easy.  Now that I think about it, I've noticed that when starting up it seems to fight the compression a bit, but I assumed that was from sitting the past two months and the cold in the garage.   Or it could also be an ACR issue.   

I should also note that I'm running a canned map from fuelmoto loaded from my PowerVision at the moment.  Winter hasn't afforded me the time to get any tuning in.

I would sure check the ACR's if it is a turning over issue. Not sure on PV but could there be a chance they have been turned off?

[jackjr68]

I would sure check the ACR's if it is a turning over issue. Not sure on PV but could there be a chance they have been turned off?

Yeah, I have to be away for work for the next two days, so I'll be checking that as soon as I'm back.  According to the map from the ECM, the ACR's are turned on.  I'll have to check the physical connections on the bike.

[HunterJ]

Make sure they are turned on in the map you are loading. Also, it should not get that hot while riding, in traffic yeah probably. Try a few auto tune runs to see if it helps. Or talk with Jamie, fuel moto, he can tweak the map for you, I assume the pv came from him.

[HD Street Performance]

Too darn hot.
Get it properly tuned. This is winter still.

[Texas 103]

Have you dyno'd the build yet? Why the SE585? thanks

Should get parts back this week and built. Planning on tuning this weekend.. Will post up numbers. Did the SE 585  vs 259 to get more down low..     

[jackjr68]

Too darn hot.
Get it properly tuned. This is winter still.

Pretty much what I figured.  Dynojet Target Tune should be here tomorrow and installed before the weekend is done.  (Not to mention that I'll also be installing my oilbud oil cooler this weekend as well)

[Yellow09SERG]

Just an FYI for those of you that are or planning on a drop in 117 kit with a set of 2.12 valves. Be sure to check your valve to piston clearance.  Not using a big cam...... .188 @ TDC and it was next to touching outside of valve relief

[BADRDE]

Just an FYI for those of you that are or planning on a drop in 117 kit with a set of 2.12 valves. Be sure to check your valve to piston clearance.  Not using a big cam...... .188 @ TDC and it was next to touching outside of valve relief

That with the kit pistons?

[HD Street Performance]

Good catch, most do not even check.

[FLTRI]

Too darn hot.
Get it properly tuned. This is winter still.

Don,
They relocated the temp sensor to a place where it reads higher than the TC mounting location.
First time I saw these temps I also was concerned. You should see how hot a Sportster shows (>300 before considered warmed) due to its mounting location.
I'm not at all convinced the actual comparable temps (TC vs M8) are that much different. I even think the new motor runs cooler combustion temps than the TC due to increased combustion efficiency.
Perceived heat and comfort (radiant) are much improved after the engine redesign (M8) and exhaust system (moved rear head pipe and converter).
Bob