What happened ?

[Frédéric CM]

Hello Guys,

Health goes bad, engine goes bad, what else will fail

Was doing a WOT to pass a car, then at around 5500rpms, engine cut off like if i've stalled... and nothing more, no more power/throttle... then few seconds latter (was coasting to stop on the side of the road), engine goes "clac clac clac clac"...
Removed the plugs once home (2 hour laters...), something seems to have hit the front plug (small impact, and it closed the gap by half), and no more comp on that cylinder...
Bike is a 2014 103 Street Bob, with 57H, 0.030" and stock heads.

Almost finished the tear down : broken valve spring retainer (front intake), valve almost falled into the cylinder (the seal catched the grooves), the valve bent, broke the guide wich fall into the combustion chamer, to finish into the squish area of the head...

How do I check the crank ? no excessise play on the wirst pin, i cannot fell any up and down movement of the rod just some side play, and 'ill measure runout today...


I know head can be rebuild, but I guess it's the good time to go 110", with ported head and new cams.
I need some advices for the cams, I like what Durwood get when he tune CR595 cams, but i'ld like the torque curve a little more on the left. Maybe a TMan 585 ps ? (I don't want the HP still climbing at 6k rpms).

Thank you !

[Frédéric CM]

(and the head)

[tmwmoose]

What a bummer , feel for ya hope you get feeling better so you can tackle this motor

[Armin]

Gee, that really sucks... hope that you're able to get things straight again!!! What valves and locks were you using in that config? I wouldn't go for 110" without examining the crank/flywheel outside the engine housing. Options are to go the S&S way or to get your crank repaired. Camwise your idea to use Tman cams ain't bad since you are seeking low end torque. I'm running Tman TR625G in my 95 build and it appears to be a torque monster with ported heads and 10.7 static compression. I used Wood TW6G and TW9BG before, they are great cams for stumppullers, but the are noiy because of their steep lobes.

Lots of luck to get things done...

Armin.

[Yo_Boss]

Looks like the Tman 590 PS or the Tman 600 PS might be good options. I too had been eyeing the CR 595 but I also like the torque more to the left.

[sfmichael]

Sorry for your bad luck 

Fix the head and go back together, not likely you really hurt anything. How many miles? I might do both heads just to be thorough.

If going 110, pull the cylinders and rotate the crankshaft by moving the connecting rods and see if it feels smooth. No tight spots or additional friction while turning usually indicates the crank is okay. Measure the run-out with a dial indicator if you're worried but I would say rod bearing failure is more common than crank failure... and both were rare in my world.

Going 110 and want torque? Try the CR575 - should be a home run. Message Durwood and see what he says.

Good luck 

[Frédéric CM]

Measured the runout yesterday, got 0.004", no play on the rod bearing (hard to fell because the front have some side play), and no excessive play on wirst pin bushing... good to go !

Back to my parts list to order...

- Can someone confirm me that the M42 inj is the usual 5.3gr injector ? https://www.fiveomotorsport.com/harley-davidson-black-ops / https://www.fiveomotorsport.com/56010us450-42lbs/hr
- what clutch spring ?

[rageglide]

That is the same injector I'm using on my 120".  Might be overkill for your combo, but I have no doubt they will work, as long as you get it tuned properly after.   

I used the Harley's add-a-plate clutch w/spring kit and it held up to 140+tq without slipping on the dyno.  It does slip in day to day use.  The heavier spring is available seperately from H-D and probably work fine.  The H-D spring is pretty stiff and can get old in heavy traffic.  That said, I never had any issues with my 103" with 57H cam and the stock clutch and clutch plates.

edit - btw my comments above are assuming you are skipping the 110 idea if you're not splitting the cases for a new crank...

[Frédéric CM]

Crank is fine so no cases splitting, and will do the 110

[yobtaf103]

Real tough luck, TR625 110 bolt on /head work/supermeg, nice torque early & holds on

2011 FLSTF, in dyno section

[Armin]

Real tough luck, TR625 110 bolt on /head work/supermeg, nice torque early & holds on

2011 FLSTF, in dyno section

Could you post your dyno run when you're done?
I run the TR625G in my 2001 FLSTCI 95 with ported heads and it's a real stumppuller. I'll get it dynoed soon and shall post my results.

Armin.

[yobtaf103]

Real tough luck, TR625 110 bolt on /head work/supermeg, nice torque early & holds on

2011 FLSTF, in dyno section

Could you post your dyno run when you're done?
I run the TR625G in my 2001 FLSTCI 95 with ported heads and it's a real stumppuller. I'll get it dynoed soon and shall post my results.

Armin.

Bumped it to top of "Dyno Runs" page

[Armin]

Got it, great curve!

Armin.

[Frédéric CM]

what exhaust do you recommend for the build ?

[Frédéric CM]

Bassani Road Rage II mega power ?

[Frédéric CM]

Cylinders will be on my hands today First new parts !

[sfmichael]

Cylinders will be on my hands today First new parts !

   

[Frédéric CM]

Current state
[attach=0]

[Frédéric CM]

...and the maths
[attach=0]

[sfmichael]

have you decided on the cams yet?

[Frédéric CM]

Yes, T-Man 585 PS (now called 590 PS2), here are the final specs :
2014 FXDB Street Bob
S&S 110" Bolt In cylinders
WFO Larry Stage 2+ CNC heads
TMan Performance 585 PS cams
HPi 55mm TB with 5.3inj
Bassani Road Rage 2 Mega Power 2-1
SE stage1 intake
10.7 static, 204ccp

Btw, does someone here have a tune (DPV) I can use as basemap ?
Thanks

[Yo_Boss]

Looks like a nice build. Can't wait to see a dyno sheet, I have been wondering about that cam.

[sfmichael]

Yes, T-Man 585 PS (now called 590 PS2), here are the final specs :
2014 FXDB Street Bob
S&S 110" Bolt In cylinders
WFO Larry Stage 2+ CNC heads
TMan Performance 585 PS cams
HPi 55mm TB with 5.3inj
Bassani Road Rage 2 Mega Power 2-1
SE stage1 intake
10.7 static, 204ccp

Btw, does someone here have a tune (DPV) I can use as basemap ?
Thanks

excellent recipe 

[jsachs1]

What a bummer , feel for ya hope you get feeling better so you can tackle this motor

That's becoming more common.  That and broken beehive springs. That's why I won't use them unless the customer insists.
John

[No Cents]

   Frederic CM...do you have your piston dome calculated correct in the Big Boyz's calculator?
You entered 0.8 cc's. The pistons in your picture look to have a little more dome on them than 0.8 cc's.    Maybe it's just me and I'm seeing them at a bad angle.