This is my winter project. 1998 Softail. Rebuilding a TP 107 to replace the factory engine. It will be backed by a Sputhe 5 speed.

 

Whew, Looks serious!

 

How much of a shot do you run on the Nitrous? Serious looking setup.

 

30. Might bump it to 40 on the TP engine.

 

While admittedly my knowledge is limited on it, I've heard nothing positive about that engine. In fact you're the first and only person I've heard of running one besides my neighbor who bought a bike with one and blew a hole in the bottom of the case first time out. No bs.
A quick scan of their website dud nothing to improve that image and they sound like they just invented the wheel in their description. No more timing lights needed? Seriously? Makes them sound ​​​desperate to come up with anything positive about their product because that sure isn't it.
So my question...why?

 

Because it's a Hot Rod...No further explanation is necessary. Right?

Nice bike!

 

60Gunner I've heard people bash and complain about every engine ever made. Every manufacturer has had bad engines. I've had people tell me that S&S is the best. I've also seen them have quality issues. I had a friend with an S&S 113 that was cursed with issues from day one. I have a Revtech 100" in my other bike that I have ridden hard over the years. Only problem I've had with that engine is a crank seal that needed replacement. Yet there are people that wouldn't even use that engine as a tire chock.
I did 22 years as a technician for Ford. I've seen all kinds of mechanical failures over the years. I've seen engines last 300 miles yet some last 300,000. It's all hit or miss.
The TP 107 is a mutt of an engine. I will admit that.
*The TP 107 cases are a 6" deck height from crank centerline (more than the typical 5.875 on SS cases)*The 107 SS rods are 7.440 (standard)*The TP 107 cylinders are TALLER at 4.885 vs typical 4.780.
*TP Case deck height to crank centerline = 6.000 (higher than typical S&S 5.875") and oh these cases are THICK! Bomb proof- you typically only see 6" deck heights on big inch motors like 134, 145 and S&S's "SA" motors - There is also plenty of meat on the case to punch out to a 4.25 bore if needed.
*The TP specific Edelbrock heads are actually VERY GOOD- they are a special run not sold to general public - 88cc chamber, 1.94" intake, 1.625 exhaust, CNC ported, raised intake an exhaust ports. Good for up to a 15:1 CR.
*Rods and flywheels are S&S.

I will basically be blueprinting this engine through the rebuild. Just like every other engine I have built over the years.

 

Heads are getting closer to being finished. I installed some compression releases. Installed new valves and did a 3 angle valve job. Then cc'd the combustion chambers. Just waiting on new valve springs.

 

Pretty bad ***