100" Big Bore Build

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Jan 3, 2019 | 06:27 AM

#11

prodrag1320

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From: deland,florida

Quote:

Originally Posted by reinhold

Hillside, forgive me don't know the technical mathematics of building an engine too much, but I am learning. Is that 98" bore + 4.375 stroke = 107"?
I see you mentioned boring my cylinders to 107, which I don't want to bore the case.

Just thinking that with more vibration from the bigger stroke would take a bit of a toll on longevity, but I guess you're right HD using them in the newer engines.
If the displacement math is substantial, then you and Hillside are leaning me right into one

And I am sure Hillside does some excellent work from what I've read already, but I'm kind of set in getting S&S cyl.s and heads.
If I did the 100" bb and 4.375 stroke, what would my displacement be around and also could I use the same pistons from the S&S bb kit?
May want to have Hillside do my bottom end when time comes.

if you went with a 4.375 stroke,youde get the S&S 110 kit (or better yet,just have your cylinders bored to 3.937" ,107")

Jan 3, 2019 | 07:06 AM

#12

Hillsidecycle.com

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Yep.^^^^^^
Scott

Jan 3, 2019 | 05:17 PM

#13

reinhold

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From: NJ

I appreciate you guys' responses, but I still am not getting it. Maybe I'm thicker than i thought, LOL !

My engine is the 06 tc88b. According to S&S parts availability, the 100" bb is the biggest I can go WITHOUT boring cases.
If I went with that kit (100") and the 4.375 crank my displacement would come to ....what?
Which S&S Heads to match ? Looking for the natural aluminum finish (silver NOT powder coated)
Which S&S chain drive Cams to match?
Also, is there any mod needed for the piston oilers?

Last edited by reinhold; Jan 3, 2019 at 05:21 PM.

Jan 3, 2019 | 06:35 PM

#14

Lambda

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From: Spain

Quote:

Originally Posted by reinhold

What they are trying to say is that the bore of the 88 TC is the same as the 96 and 103, the only difference is the crank stroke, since you're buying a new flywheel instead of going for a 4" stroke just get the 4.345 (same stroke as 96 and 103) so you can end up with a 110 when using the S&S kit or a 107 when boring your cylinders, you can go 100 with 4" stroke or 107/110 with the 4.375" stroke, the bore of the cases stays the same, the thing about the 110 is that S&S uses special cylinders with harder liners, actually the cylinders are the same as the 100" kit, probably the only change between the 100" 4" stroke and the 110" 4.375" stroke is (obiously) the stroke and the pistons.

Jan 4, 2019 | 12:14 PM

#15

98hotrodfatboy

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From: Poolville

Dude.... Your being foolish or your just trying mess with people... No body in their right mind would replace the crank without increasing the stroke... And want to build the **** out of a small block.... It just makes no sense at all.. Stress out a small block but want big block power and reliability.. I've been there/done that.....It will die out eventually and you'll want more.. Don't be a fool.... A big block at 10.0:1 is very reliable with lots of power providing you get it properly tuned....

Jan 4, 2019 | 06:50 PM

#16

reinhold

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From: NJ

Quote:

Originally Posted by 98hotrodfatboy

I did state that I don't know about "building an engine" although I am an auto mechanic. I've never stroked an engine and see that if you ask 100 ppl about doing something, you will get a magnitude of different responses.
I'm not messing with ppl. and if asking questions isn't the way to learn, well, maybe I am not in my right mind. But, that is why I am here and asking .... so I don't be a fool.

Too bad HD couldn't get it F'''''''''ng right, i wouldn't have to do the bottom end at all or timing chain tensioners.
Instead I have to spend as much for parts as I did for the bike itself not to have to worry about pushing it home if I get on it.

Last edited by reinhold; Jan 4, 2019 at 06:54 PM.

Jan 5, 2019 | 07:36 PM

#17

98hotrodfatboy

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From: Poolville

They did get it right when they went to the 4.375 stroke.... All I'm saying is listen to what Kirby and Scott are saying .. it's totally logical and reliable.. you really want to max out that 88"er

Last edited by 98hotrodfatboy; Jan 5, 2019 at 07:39 PM.

Jan 7, 2019 | 06:29 PM

#18

ses

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From: Moorhead MN

I just did my 06 FLHTCI TC88 and had the same questions. It had high mileage so doing only the top end with a big bore was questionable. I didn't need the biggest horsepower in the neighborhood but since going into the bottom end I opted to go with the S&S 4 3/8 flywheels going to 103". I also had the hydraulic cam chain tensioner plate, this added a new set of issues picking a cam since conversion cams are limited. I however had the right case sent in to have the bearings journal machined to accept 07 and up cams. My other concern were starting issues do to no compression releases in the heads. I opted for the S&S EZ start 551 cam to overcome any warm start issues. Due to winter the final tune isn't done but so far the numbers have been around 98 Hp and 106 TQ. This is stock heads and TB.