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Post by oldgeek on Dec 31, 2014 22:41:02 GMT -5
Cleaned up the piston and cylinder today, installed thin base gasket coated with copper spray. Installed the head, head gasket, and torqued it down to check squish. It was around 1.5mm, so I removed the head gasket that was about .5mm thick and coated the head with copper spray. Put the head back on, and squish now measures .96mm to 1.01mm depending where you measure. I don't know if squish will change much after it settles in and I re torque the head.
I sealed up the reed cage and the spacer I made for it with threebond, but I am not going to seal the intake with anything but a gasket because apparently to install or remove the motor requires removing the rear facing intake pipe.
It looks like the motor will be done well before the rest of the scooter is. The shop that I bought the vento zip carcass from has been busy, and has not started to work on it yet. The Zip uses 100/60-12 tires and it needs both of them replaced. The cheapest place I could find that size tire is Parts for scooters for $30.99 ea,
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Post by oldgeek on Jan 6, 2015 23:02:39 GMT -5
Here are the #'s for the Turbo Kit pipe I was planning to try on this 99cc build. I would attempt do the math for this pipe, but my math skills are horrible.  EDIT: Made dimensions a little easier to read. |
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Post by 2strokd on Jan 7, 2015 10:07:29 GMT -5
Looks like a complete hydroform build. Very nice "blend" from section to section this way.
Edit: Excuse me, i see John already mentioned it was a full hydro pipe. My bad, i have not
been on enough lately.
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Post by oldgeek on Jan 7, 2015 10:57:09 GMT -5
Yes, he did say it looked hydroformed. I thought it looked like 2 stamped halfs, but the more I look at it I think he and you are right☺I see some welds added to fix split seams here and there.
Sent from my SGH-T999 using proboards
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Post by 2strokd on Jan 7, 2015 11:03:40 GMT -5
Here are the #'s for the Turbo Kit pipe I was planning to try on this 99cc build. I would attempt do the math for this pipe, but my math skills are horrible.  In this pic it looks like a "bung" or fitting for the water inlet is still in the pipe? Up on top the diffuser cone? Not back far enough to be an EGT sensor hole is it? |
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Post by oldgeek on Jan 7, 2015 11:59:15 GMT -5
That is the bolt mount for the silencer clamp. I think this pipe looks like a C16, I hope it works like one!
Sent from my SGH-T999 using proboards
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Post by 190mech on Jan 7, 2015 12:50:21 GMT -5
Get me some diameters and I'll see how close to a C16 it really is.Just looking at it makes me think its a higher rev pipe than the last one..
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Post by palezu on Jan 7, 2015 14:53:02 GMT -5
Length from flange to end of baffle cone is 711mm, that is a real screamer pipe  . If the cylinder can keep up, I'd expect a powerband of 9000-13000rpm, with peak power at around 12000. I'd recommend an exhaust duration of 192-195 degrees and 130 transfer for that pipe to work properly. Did you measure cone lengths from the angled outside of a cone or estimated the straight length, "inside" the pipe? If the lengths in the picture are the cone outside lengths, then the actual tuned length of the pipe is even shorter. Under 700mm starts to be a bit too short for these engines. |
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Post by oldgeek on Jan 7, 2015 16:49:56 GMT -5
Get me some diameters and I'll see how close to a C16 it really is.Just looking at it makes me think its a higher rev pipe than the last one.. I posted dimensions last night 1 page back. I will repost them when I get home later if necessary. I am sorry for the small labels in the picture, they looked a lot better when I was making them. Sent from my SGH-T999 using proboards |
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Post by 190mech on Jan 7, 2015 18:49:56 GMT -5
I didnt even know there were dimensions there!I'm color blind and reds in certain backgrounds are invisable..Could you change them to white or yellow?
Thanks, John
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Post by oldgeek on Jan 7, 2015 19:10:30 GMT -5
I didnt even know there were dimensions there!I'm color blind and reds in certain backgrounds are invisable..Could you change them to white or yellow? Thanks, John Yeah, sorry about that. It looks like I purposely made it hard to read, but I didnt. Working on the better one now. I just pulled the head you cut for me out of the mail box. Thanks again for doing that! |
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Post by oldgeek on Jan 7, 2015 19:33:58 GMT -5
I edited the dimensions in the picture, they are a little better now. I also just fished a piece of string through the pipe then measured the string. The string measured 835mm |
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Post by oldgeek on Jan 7, 2015 19:59:53 GMT -5
Length from flange to end of baffle cone is 711mm, that is a real screamer pipe . If the cylinder can keep up, I'd expect a powerband of 9000-13000rpm, with peak power at around 12000. I'd recommend an exhaust duration of 192-195 degrees and 130 transfer for that pipe to work properly. Did you measure cone lengths from the angled outside of a cone or estimated the straight length, "inside" the pipe? If the lengths in the picture are the cone outside lengths, then the actual tuned length of the pipe is even shorter. Under 700mm starts to be a bit too short for these engines. I pushed a piece of wire in the headpipe, and the stinger to get their length. The rest was measured on the outside. I just fished a piece of string through the pipe then measured the string. The string measured 835mm |
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Post by 190mech on Jan 7, 2015 20:40:39 GMT -5
Waay Hot Rod pipe!
Head pipe 1.7 degree
1st stage diffuser 5.4 degree
2nd stage diffuser 7.9 degree
spacer/belly
Baffle cone 10.7 degree
total pipe length 611mm (stinger not included)
head pipe 31% (30-32% ideal)
Headpipe/diffuser 70.5% (64-68% ideal)
The Yasuni C21 has a total length of 689mm,This one is only 611mm!Very high RPM set up needed..For a 90cc+ build a spacer in the head pipe,or belly would be needed to get the tuned length in the much lower range of 10.500 to 11,000 RPM..
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Post by oldgeek on Jan 7, 2015 20:54:50 GMT -5
Waay Hot Rod pipe! Head pipe 1.7 degree 1st stage diffuser 5.4 degree 2nd stage diffuser 7.9 degree spacer/belly Baffle cone 10.7 degree total pipe length 611mm (stinger not included) head pipe 31% (30-32% ideal) Headpipe/diffuser 70.5% (64-68% ideal) The Yasuni C21 has a total length of 689mm,This one is only 611mm!Very high RPM set up needed..For a 90cc+ build a spacer in the head pipe,or belly would be needed to get the tuned length in the much lower range of 10.500 to 11,000 RPM.. Well dang! I guess this pipe is also too much for the 70cc streetrace build? And the Malossi MHR race pipe is not a good choice for the 99cc build either. That leaves me with the Technigas next R pipe, and the technigas RSII (much larger pipe) I guess I need to get dimensions for them to you to see if either pipe is suitable for the 99cc build. |
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. If the cylinder can keep up, I'd expect a powerband of 9000-13000rpm, with peak power at around 12000. I'd recommend an exhaust duration of 192-195 degrees and 130 transfer for that pipe to work properly.