Originally Posted by Wenbiao

Hi Houston,

Some questions on the BTTS.

We bought 3 pcs of BTTS from you somewhere this time last year.

1) I broke in the engine using heat cycle method, with OS P3 plug. The whole process turned out well except the tightness.

2) Tuned the engine, went for race, using werks 4 pcs clutch. All good.

3) 2nd race, problem arised, tuning went haywire, idling went up high when coming in for pit. No power when moving off and power suddenly kicked in after 2-3 seconds. Temp was arounf 140 to 150 degree. when tried to lean down the top, it lost the top end and when tried to rich out the bottom, no pick up and clogged. Whatever methods we tried didnt seem to be right.

4) Shelf the mill for few months, one of the local top racer told me, cant run OS on Nova, either Nova plug or O Donnel.

5) So switched to O Donnell as I got some on hand.

6) Went for another tuning session last Sat. Immediately all went smooth, idling was stable and the power resumed. Completed 2 tanks without any complain. Cool the engine down and decided to try again

7) Nightmare was back. Engine started, throttle car didnt move except RPM kept going up and car stayed put. It came to a certain RPM when it stayed and the car still stationery. Sound like low end was rich.
And we had to retune all over again.

8) Any advise.