Ace cylinder porting???....

[viclioce]

I was going thru my spare cylinders today. One of them appears to have had some kind of porting done to it.

There are, for lack of the known terminology, some type of “finger ports” running up the inside of the cylinder wall.

Second, the holes in the base of the cylinder have been enlarged on either side.

Third, the exhaust port opening has been widened.

The porting looks like it was done by someone with a somewhat unsteady hand.

Finally, tho what appears to be somewhat crudely, the intake ports on the back of the cylinder have been enlarged.

Here’s a few photos. Can someone tell me what’s been done to the cylinder porting wise? Is it reed porting for an Ace? Is it something else? Is it useable? Victor

[Bullfrog]

Yup. Reed valved and "hot rodded".

Ed

[viclioce]

OK. So then it would need either an Ace piston drilled with 4 open holes on the back of the skirt, or a similar Super Rat piston?

This is the first example I’ve seen of a standard Ace cylinder converted to reed and the porting which goes with it. I get what all the enlarging does, but what do those funny looking finger ports, or whatever their correct terminology is, do for the motor?

[Bullfrog]

Those ports provide for increased "transfer" flow. ie transfer of fuel/air from the bottom end of the engine up to the combustion end of the engine.
Ed

[viclioce]

I see. Well good to know! I’m not quite sure of the bore on it yet, std, .010 maybe. Do you concur that it looks to have been done well enough to use even though it wasn’t done by a real steady hand? Victor

[Bullfrog]

Long distance review suggests that the cylinder may be a "full race" cylinder with peaky power-band, a possible tendency to eat rings or pistons . . . but which runs like a cheetah on nitrous between (possible) top end failures. Waviness in the porting may not be ideal . . . but has very little to do with above knee-jerk assessment. Probably a cylinder best used by an experienced old school tuner.

Ed

[viclioce]

I’ll trade it to anyone who will swap me a stock Ace cylinder which is ready for a piston! Free port job for anyone who wants it! Victor

[taber hodaka]

I will trade you Victor. ------------- Clarence

[viclioce]

Let’s Do It Clarence!!! Victor

[taber hodaka]

what address do I use? I also need to send out to a few others, Bruce and the trivia winners. -------------Clarence

[viclioce]

Clarence. Here’s my address!

Victor Lioce
1088 Sunshine Way
Santa Fe, NM 87507

[viclioce]

Clarence. Have you sent that Ace cylinder yet? Just checking in? Victor

[taber hodaka]

Victor please call me or I will you. 406 261 9326 ------ need to know what I have you could use cylinder wise. ---------------- Clarence

[viclioce]

Clarence. Just a stock Ace cylinder from standard bore to .020 over. Anything usable. Doesn’t need to be reeded or special porting. Just a stock Ace 100. I’ll be holding it for a spare. Victor

[taber hodaka]

Packed and ready to ship.--------------- Clarence

[viclioce]

Great news! I’ll send the ported one back in the same box! Victor

[taber hodaka]

In the mail Victor and Bruce. ------- Clarence

[viclioce]

Great Clarence! I’ll be watching for it! Victor

[viclioce]

Clarence! The Ace cylinder arrived today!!! Yeay!!! I’ll get the ported one in the mail to you tomorrow! Victor

[taber hodaka]

Victor how did it look to you?

[viclioce]

Looks fine inside! Inside a little dirty & rusty, but nothing I can’t clean up & repaint! Be watching for the same box coming back to you! Victor

[viclioce]

Clarence. Here is the tracking number for the cylinder being sent to you! It went out today!

Victor

9534 6118 0023 1221 1941 23
USPS

[viclioce]

Clarence. According to the post office the box with the cylinder was delivered today. Did you get it? Victor