Autosport Labs

Out of interest are resistive plugs a requirement??

I have been using the standard spec ones for the engine which arent resistored and they keep failing.
Happened twice ran three days then plug in No 3 went bad. Swapped it and next day plug 2 went.

Further question... Just after some clarification about manifold vacuum pressures. Ignition off the reading is showing as 101 KPa. (assuming atmospheric pressure) At engine idle it is between 65 and 70 KPa When revving under no load with wide open throttle the KPa figure drops to about 30 to 35. (i....

Its running with the blanking sleeve in i.e. no thermostat.
High flow 2 core radiator. Just ordered an electric fan to see if it solved the problem.

Also anyone know why the KPa value might be so high at idle? Can range from about 65 to 70 odd. Seems quite high compared to others

Ok well after modding the head this weekend - I have taken the compression ratio down to 10.3:1 The knocking problem has sorted itself out and the engine runs up and down the rev range in all gears from low revs Everything is fine now except I cant stop the thing from overheating. After a few minute...

Thanks for the response guys. I have the car running on Super unleaded which had been fine when on the old point distributor system. The compression ratio had given no problems previously and it did seem to give it some good low end torque. It does have a tendancy to blow head gaskets every now and ...

I addition fired it up again today. Sometimes backfires on cranking.

When driving with your foot hard down pulling at low revs it is very juddery and it sounds almost like a diesel chugging away.

Anyone any ideas?

Plugs and leads are all correct. I had the timing light on it and the figure on the megajolt coresponds with the timing marks.

Could the fact it is a high compression engine be the cause?
I.e the ignition is to far advanced and the problem I am having is engine knock/ping?

New user after a little advice from someone a little more knowledgeable. Car is a Mini 4 Cylinder 1380cc Kent 286 cam Stage 3 Head 11.5:1 Compression Ratio Normally aspirated 6000 Rev Limit MAP Sensor I have the mjlj fitted and have the car fired up and running. The problem I am having is the car wi...