Yes, this will be the limit from this crank. but some timing increase u will see a new star raise again

Also BRB should out last your crank pin. I am still using the GEN 1 BRB but is on my second crank now, lost little bit of bottom end only

Do you mean 0.3mm shim is the limit?
To increase the timing, this would mean modifying the crank, I take it?

yes, I mean crank timing

I'll have to measure the crank timing when the races this week are over.

Thanks for the info. Mark.

First time tested Odonnel plug last weeked.
So far only 7 tanks and felt much more confident using it.

97T , 30%, 0.5mm total head shim, 5.4 carb, 6mm pipe
std Nova crankshaft / crankcase
LSN 1 1/2
HSN 4 3/4
temp at plug 113c
air temp around 30c

I will try 77 and 99 next week.

timing calculation script
Here is attached very small timing calculation script. Sorry, but it is on Russian.
hey I tryed to attached, but it doesn't want to accept extencion.
If anybody can help and do something with it and put it here in forum. I can email it.
Thanks in advance.
Edward

Mark,

I think your temp is a little low. Edward suggests 230-240F to get the sleeve to expand a little more (reducing piston friction). This will help a bit with the top end too.
Try tightening the clutch a little. If it's too loose then the engine might bog a little on engagement.

A simple question, once the crank timing is establish...how do you change it?

Rgds

if you want to advance the opening, cut the leading edge of the port, if you want to delay the closing, cut the trailing edge.

data

Send it to me Ed. Will sort it out for you.

basic timing mod on crank, per your request.

data

Hi guys.
I really appologize to don't be here for last 4-5 days. I was really sick and couldn't get to the Internet.
Now feel much better.
Best regards
Edward

Hi Ed,

Glad to hear your feeling better.

I sent you an email.


Kevin

Glad to hear your feeling better now i won't feel bad waking you up at three in the morning lol!! talk to you soon Peter