When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Engine Mechanical TopicsDiscussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
I am currently running an S&S case and crank@96". I would like to know what is the maximum size I can have the cases bored to? Looking at possible 116"... 4.0" x 4.625". If that's not possible what would be? The case in question is the one shown below.. Thanks..
I believe the biggest bore is about 3 11/16 inch.. The problem is that the studs are too close to the bore and there isn't any gasket surface left if you go bigger. SnS engine cases that support 4 inch and 4 1/8 bore have case deck raised 1/2 inch and different cylinder stud spacing..
Last edited by Max Headflow; Aug 28, 2022 at 12:04 PM.
Reason: 3 11/16
Yeah I'm not totally sure about the 3 5/8" cases.. I do know that S&S does make a different case for 4.0" bore and larger.. might be the way I go.. And then the pistons and cylinders..
Yeah I'm not totally sure about the 3 5/8" cases.. I do know that S&S does make a different case for 4.0" bore and larger.. might be the way I go.. And then the pistons and cylinders..
The 4 inch / larger bore case has a 1/2 in taller deck and different cylinder stud pattern. Heads and cylinders are different.
The 4 inch / larger bore case has a 1/2 in taller deck and different cylinder stud pattern. Heads and cylinders are different.
I've read that even the cam chest is a half inch wider which would be necessary so yeah it's definitely a totally different design but man it sure would be nice to have 116 cubic inch motor in that baby.. My problem is I get tired with what I have and need to move forward. I guess it's like a heroin junkie.. I need another hit man.. Maybe This Time some fentanyl.. Lol..
However you might be right about maybe going to NOS or maybe even a turbo.. at this point I bet it would be cheaper than going to Cases, cylinders and Pistons.. I don't know we'll see..
But in all honesty going with those two options would create so much more power than I really want which means building a bigger drivetrain and I really didn't want to do that.. I just wanted to go with a mid grade 113-116 cubic inch 10.2:1 build that had really nice torque nothing crazy stupid.. like maybe 130-135 lb tq..
Last edited by 98hotrodfatboy; Aug 28, 2022 at 02:51 PM.
EVO run pretty good with AC.Exhaust, head work and Cam. Followed with proper tune. If you keep it with reason they run great and darn near bullet proof.
Mine is 26 years old still doing the job.
I've read that even the cam chest is a half inch wider which would be necessary so yeah it's definitely a totally different design but man it sure would be nice to have 116 cubic inch motor in that baby.. My problem is I get tired with what I have and need to move forward. I guess it's like a heroin junkie.. I need another hit man.. Maybe This Time some fentanyl.. Lol..
However you might be right about maybe going to NOS or maybe even a turbo.. at this point I bet it would be cheaper than going to Cases, cylinders and Pistons.. I don't know we'll see..
But in all honesty going with those two options would create so much more power than I really want which means building a bigger drivetrain and I really didn't want to do that.. I just wanted to go with a mid grade cubic inch 10.2:1 build that had really nice torque nothing crazy stupid.. like maybe 130-135 lb tq..
I don't think it's 1/2 inch but maybe about 1/8 to 1/4.. The crank would have to be different if much more. I do know that SnS TC cases have the tappet covers out about 1/8 inch. The Evo cases moved the Tappet blocks out a little.
Slideshow: Jason Momoa's latest restoration project blends 1920s Harley-Davidsons with modern electric technology, creating some of the most unusual hybrid motorcycles ever built.
Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom
Slideshow: Killer Custom's latest build relies on styling changes rather than performance upgrades, giving the cruiser an entirely different personality.
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Case Boring....
