78 pinto e50
15mm bing w/ 82 jet
Proma Gp Exhaust
70cc airsal kit w 70cc hi compression head
So i got the 70cc Airsal kit and 70cc hi compression head and installed it yesterday.
I followed the break in procedure here http://www.mopedarmy.com/forums/discuss/7/165899/165899/
Before installing the kit I was getting 31 top with the stock 50cc.
With the 70cc head and kit on I was getting 30 as my top speed.
I then bolted the stock 50cc head back on I was getting 35.
I didn't port or case match it , so I know im not getting the full power (thats my winter project).
Why would the high compression head perform worse? The top speed was lower and acceleration felt the same with it on.
I have no air leaks and have adjusted my point gap.
Also, on the performance sheet, others are getting 45 with the same set up but instead of a proma gp a techno estorill pipe. Does that pipe give 10+ mph boost?
What gives? What should I check next?