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I had 2003 ford mod motor w/Kenne Bell on alcohol built. I am running 28-29 #s of boost. Car dynoed 780 at the wheel. Motor is in my newly built 2008 tube chasis full fiberglass shelby. I have not gotten a full pass down the track yet due to the identical reoccurances every time and have now lifted the head gaskets twice. I am running the fast xfi fuel inj. and msd digital 7al ignition.
The datalogs shows about 2/3 track every time the boost spiking to the gauges max of 31#s and my rpm completely falling off @ the exact same time instantaneously. It is like the motor is just loosing all hp. The plugs are NGK TR6 and are snow white and have noticed the porceline is being peppered and some electrodes even being burned off. This was happening most recently in the retunes that were put on the computer. I finally talked to tech @ Kinsler Fuel Inj. who did my fuel system and what he is saying is my plugs heat range is way to hot, he is essentially saying which I'm finding is that I pretty much starting detonation. I have put in the 3 step colder plugs, but have not had a chance to put it down the track yet. Hoping to this Saturday. Numbers so far down the track as far as I've gotten have been great. Car w/ me in it weighs 2600#, 60' time 1.17, 1/8 mile if I remember was low 6's, fastest in the 1/4 the car shutting down was 8.78- that time had a mph of 131 in the 1/8 and 131 in the 1/4.. So the car is pulling hard, but I am stumbling with this boost/hp/fuel/ign./plug issue. If anyone would have any insight in this, anything would help to possibly look at before putting it down the track with this issue.
thanks in advance,
Armageddon Racing
The datalogs shows about 2/3 track every time the boost spiking to the gauges max of 31#s and my rpm completely falling off @ the exact same time instantaneously. It is like the motor is just loosing all hp. The plugs are NGK TR6 and are snow white and have noticed the porceline is being peppered and some electrodes even being burned off. This was happening most recently in the retunes that were put on the computer. I finally talked to tech @ Kinsler Fuel Inj. who did my fuel system and what he is saying is my plugs heat range is way to hot, he is essentially saying which I'm finding is that I pretty much starting detonation. I have put in the 3 step colder plugs, but have not had a chance to put it down the track yet. Hoping to this Saturday. Numbers so far down the track as far as I've gotten have been great. Car w/ me in it weighs 2600#, 60' time 1.17, 1/8 mile if I remember was low 6's, fastest in the 1/4 the car shutting down was 8.78- that time had a mph of 131 in the 1/8 and 131 in the 1/4.. So the car is pulling hard, but I am stumbling with this boost/hp/fuel/ign./plug issue. If anyone would have any insight in this, anything would help to possibly look at before putting it down the track with this issue.
thanks in advance,
Armageddon Racing