Looking around on e bay this evening I found Ultima engine cases that say Evolution bottom end Twin cam top end. Would this be a good way to go for a big inch Evo build?
Very good way to go. The TC heads and cylinders in their oem form have much better cooling thanks to larger and more cooling fins. The heads are much more efficient and will typically be in much better condition that even the most cherry evo castings and have potential to support a lot more horse power than factory evo castings. Plus there is the improved head vent system, leak free rocker boxes, abundance of inexpensive heads and cylinders, etc, etc. Everything about a FATVO is better than an oem based EVO engine. Everything.Looking around on e bay this evening I found Ultima engine cases that say Evolution bottom end Twin cam top end. Would this be a good way to go for a big inch Evo build?
Thanks Mattbastard. Why do you think nobody is building them anymore?I did a little Fatvo recon before I went 106" with my Evo. The TC top end will get you to 100" if you have a 3.875" bore on the TC cylinders using the 4.25" stroker crank, but you have to have the pushrod tube holes in the head modified to fit the new pushrod angles.
Probably why it's going for pretty cheap on eBay, nobody builds them anymore.
Not true. Way too much misinformation and here say. Good grief.Thanks Mattbastard. Why do you think nobody is building them anymore?
I don't THINK they're as popular as they used to be now that S&S has created their Special Application cases that come with piston oil jets and it bolts right up in a stock Evo location, and go all the way up to 124".Thanks Mattbastard. Why do you think nobody is building them anymore?
Having fully rebuilt both engines, while also not being a professional engine builder but I am a mechanical engineer, the following is exclusively my opinion. I believe the TC is a better overall engine design for the following reasons (in no particular order):Matt
i don't think anyone needs to PM you-
You are allowed to agree/disagree with other thoughts on here.
You might have a good one.
Or I might disagree with it .
It would great if you just say whatever is on your mind.
It is all a learning curve.
We all have different experiances to draw from.
As for me, so far I have run with a passion from the Twinks!
It seems the net is overwhelmed with out of phase wheels, cam chest that is good for about 30K.
As I always say "no matter what HD you choose they all come with congenital defects and it is a matter of what you are familiar with and what you want to fix.
The M8 has already had a ration of problems.
My favorite engine case would be a Delkron 4 cam Big twin .
Albeit I have never owned one it would seem to be the best of all worlds.
They are just not available anymore.
The look from the guy on his 30K$$$ plus bike as you pass him going up 4th O July is worth every penny!I've been riding for 59 years and always love tinkering changing front ends etc. I just recently decided to make my 01 fxst chopper with 3 over tubes harder to ride so I built my on parts for sucide clutch/ jockey shifter. But I just have never been clear as to why people want bigger engine's. I did own a Big dog Ridge back 117 cubic power plant. It was fun just for me it was unnecessary. Plus my most portant reason is money and skill. Not saying anything against big engine's I just never had the need. Oh by the way thanks for the great forum. Snake out