Anybody have any new updates on the 912 big bores, zipper or edge, especially the 1622 big bores?
Thanks, Steve
Anybody have any new updates on the 912 big bores, zipper or edge, especially the 1622 big bores?
Thanks, Steve
I love mine. 500 hours and counting flawless service!
I emailed Zipper Big bore about a month ago. Never heard anything back. About 3 weeks ago I emailed them again, and Jay called me. He is more of the sales guy so in my situation, he thought it would be best to have Hal Stockman call me. That was 2 weeks ago and I haven't heard anything from either.
So I guess an update would be....they are not easiest to get get ahold of.
I have heard good things about Zipper bigbore, hence the reason I called but I am bummed about the lack of response and communication especially when I am ready to spend money to get my engine going.
A long time member on the AvidFoxFlyers forum has a set listed for sale. Here is part of his add. JImChuk
For sale Zipper kit piston and cylinders 105 hp used 3000 USD PLUS shipping. 274 hrs will include new pushrods seals
Have you tried Mike at Stolcreek? Seems very knowledgeable and he does big bores.
Dustin Dickerson
Building 7ss STI x 2
Oratex
29" shock monster
EP912STI 155hp
Garmin
N33TF......FLYING!
N53TF......FLYING!
I've been in touch with Michael at Stol Creek Aviation located near Whitewater, Kansas. He is very responsive, and very knowledgeable. He does Edge Performance big bores, and most other engine work. Check him out. easy to find via google.
Kitfox Sport TW
Colorado
Yes I actually bought the 1484 kit from Mike at Stol Creek, but was actually thinking of selling it and going with the 1621 kit, just curious if that bigger bore was still reliable as smaller kits?
Steve
I talked to Mike as well. He mentioned that he also has take off cylinders from 912 ULS engines that were upgraded. They will fill the UL. Said it gives 95 hp. This is a 50% cheaper upgrade.
I have a 1994 912 UL. brand new never run, still on the plywood from the original crate. But, it has been sitting untouched. I am on the fence about using it. It will need a teardown inpsection and I think a Stator replacement? (SB I think) Weighing all my options.
Steve, if you go with the bigger kit, I might be interested in your 1484 kit.
I have just installed one of Hals 104 hp kits, this is an amazing upgrade,.
A few questions
1 has anyone done a before and after cranking compression test, my pressure is 145 psi I didn't do a before upgrade comparison.
2 the reason I am asking is we weren't happy with the amount of valve shrouding with the stock 80 hp heads, does everyone leave these as stock?
The heads were cnc machined to be more like the 100 hp heads, this requires a small cutting of the heads to restore stock pressure.
This was a bit of an educated guess ,also valve geometry was taken into accoumt.
BTW we set the ivo 72 inch prop to 5100 static with the original setup. After the upgrade I could easily exceed 5800 after an hours breakin
I'm looking forward to getting some more testing and solid performance numbers
Jerry, this is the 114 high compression kit, don’t think you would want that on the UL 80 horse.
steve