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Driveline Performance Cylinders


BANSHEE HP

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cnc tunnel porting sounds like a big time winner!!

 

421 cub is pretty much drag ready right out the box. get the domes right  right pipes good tune alky carbs your sitting on 100 hp pretty easily.  so you dont really need to know shit about porting  its this fact that has made a bunch of not really porters seem like a good shop.   getting a nice midrange overall setup has seemed to be the killer with most places..  not to many can lay out a nice flat curve in the 75-80+ hp range.  even with servals its seeming hard to do unless you really know whats going on in there. 

 

even new porters should be able to have a lot of fun with these cylinders.  and knowing your not going to be plauged with nico issues or weld leaks is even better

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Were seeing high 70's low 80's and 45 ftlbs of tq from a 421 with 35mm carbs  and cpi or shearer pipes with very little intake and exhaust work, other than adjusting the port heights to just under a cub as cast. While talking on the phone with someone today I had to explain how "as cast" is going to be only sold as un-plated cylinders. We wont be sending as cast to be plated, the cylinders we'll sell ourselves will all be ported to some degree. A port job, effectively a "dune" port job will replicated on the cylinders that we have plated and will sell as bolt on kits with our pistons and domes etc. We can at the time of purchase port your cylinders to however you like for an additional cost. Another question I was getting was whether or not there were room for "boost ports"? Today I figured that out. This is the result of about a hour and a half figure out where to drill and how to start them to a ported finished product. Builders that are handy with porting tools like Cam said should really shine with these.

 

PART_1437438384819_.IMG_20150720_202537.

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When will we see some dyno charts on them? Will you guys do the porting in house or send them out? The 775 is a great deal. But buying an unplated set, by the time you port and replate, your lookin at well over a price of a cub and more hassle. What are your prices to port? Can transfers be opened up more then stock? Is it a triple exhaust? If not, why not lol. You guys are the shit, great customer service fast shipping etc. We haven't seen any drivline drag ports yet though, dat'd be interesting, or even doing a deal were you can port it and plate it after if someone wants to pay the extra, most builders I know will port an unplated cylinder cheaper because u gotta be careful in there with fresh nik. Just IMO, and if these sell good, will we see any bigger bore sizes then the 68?

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