|
Post by JA-Moo on Aug 23, 2015 2:13:02 GMT -5
Denco is a bit small, you are safe to 68% cordle width.
|
|
|
Post by triplepoweredgpz on Aug 23, 2015 8:31:13 GMT -5
I've bin reading that a more squared off port let it rev higher, so I think stay close to stock radius would make sence? Width of the port at 70% of the bore?
|
|
|
Post by triplepoweredgpz on Aug 23, 2015 8:32:21 GMT -5
Sorry didn't see your post moo
|
|
|
Post by JA-Moo on Aug 23, 2015 12:36:14 GMT -5
Depends if you want ring life or not. It's more of the corner radius than the port radius. 12mm radius is semi safe, and stock port curvature.
|
|
|
Post by triplepoweredgpz on Aug 23, 2015 17:36:09 GMT -5
Okay, gonna keep bugging you john. You said for squish less then 0.5mm but then you said more then 0.035". But 0.035" is 0.89mm. So am I missing something? Or was there a mistake somewhere?
|
|
|
Post by JA-Moo on Aug 23, 2015 19:52:01 GMT -5
My bad, was thinking deck height, 1mm or .040" total clearance......
|
|
|
Post by triplepoweredgpz on Aug 23, 2015 20:14:25 GMT -5
Lol, back to the drawings board...so I can lift them another 0.7mm, which puts it at 1.1mm lift. Do the exhaust and check compression
|
|
|
Post by JA-Moo on Aug 23, 2015 20:45:04 GMT -5
Sorry about that. I just do all my calculations off a .5mm deck, and .5mm head gasket......
|
|
|
Post by triplepoweredgpz on Aug 23, 2015 20:57:10 GMT -5
I can't use deck height because my inserts sit below the deck. Everything was design with the lift, but hopefully when I get everything sorted the compression still works out... Let's all cross your fingers for me...lol
|
|
|
Post by triplepoweredgpz on Aug 24, 2015 23:44:53 GMT -5
Ordered new base gaskets, I think I'm good this time...lol
|
|
|
Post by triplepoweredgpz on Aug 30, 2015 14:45:50 GMT -5
So got some chambers from a ski-doo mach 3, similar hp, close cc and slightly lower peak rpm... Think I've found away to modify them to fit and keep them the same length. Just a band aid until I can get the money for custom chambers. Plus they have that hydro form look
|
|
|
Post by triplepoweredgpz on Sept 6, 2015 22:36:41 GMT -5
Has anyone ever used auxiliary exhaust ports? I know there primarily for power valve engines, but wouldn't it help with ring life? Instead of widening exhaust ports?
|
|
|
Post by JA-Moo on Sept 7, 2015 9:58:55 GMT -5
You can't just drill "holes", or grind them in because of the weird angles. And your rings will be fine at 68% with a good chamfer.
|
|
jyrgnorway
2nd Gear
H2B CAFE, H2B, H1B, F8 BISON, Z1000ELR, RD500
Posts: 468
|
Post by jyrgnorway on Sept 7, 2015 14:42:16 GMT -5
Has anyone ever used auxiliary exhaust ports? I know there primarily for power valve engines, but wouldn't it help with ring life? Instead of widening exhaust ports? You don't have enough meat between cylinder liner and the cylinder studs to make aux cyl ports that actually works. But yes, in theory the 3 ex port design is the very best because of the significant increase in blow down area. Even better than bridged exhaust port. If you have a F8 Bison though, or a early S1 cylinders, you can make those ports. But it is a hell of a job to make them correct, and just putting in a 350cc gives more power. ..j.
|
|
|
Post by triplepoweredgpz on Sept 7, 2015 14:57:51 GMT -5
I was looking at that, and ya, think your right
|
|