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When I bought my Elva MK IV it came to me with a Coventry Climax FWE (1218 cc's) as the seller wanted the FWB (1460 cc's) engine he had been running in it to put in his Lola MK I. I have been running the FWE for the last two seasons with pretty good success though I cannot compete with well driven sports racers that have the larger engines.
Though it took a bit of looking I was fortunate to buy an FWB engine from a fellow last year and to make a long story short I installed it in the car today and expect to run it for the first time at the upcoming Wild Hare race at VIR next weekend.
I engine dyno'd the engine a few weeks back both to break it in and to get power curve, fuel/air and other information and we were a bit disappointed in that it only put out 110 HP with a flat curve from about 5800 up to 7500. It is the consensus that the cam has a rather mild grind and I intend to reprofile the cam that was in the FWE with a more aggressive grind and put it in the FWB, but since this is still about 20 more HP than the FWE supplied I will have the opportunity to get used to the increase in power on an incremental basis.
I'll also be able to run against my seller at the Wild Hare and he claims to have gotten 130 HP on an engine dyno so it will be interesting to see how numbers translate into on-track performance.
Though it took a bit of looking I was fortunate to buy an FWB engine from a fellow last year and to make a long story short I installed it in the car today and expect to run it for the first time at the upcoming Wild Hare race at VIR next weekend.
I engine dyno'd the engine a few weeks back both to break it in and to get power curve, fuel/air and other information and we were a bit disappointed in that it only put out 110 HP with a flat curve from about 5800 up to 7500. It is the consensus that the cam has a rather mild grind and I intend to reprofile the cam that was in the FWE with a more aggressive grind and put it in the FWB, but since this is still about 20 more HP than the FWE supplied I will have the opportunity to get used to the increase in power on an incremental basis.
I'll also be able to run against my seller at the Wild Hare and he claims to have gotten 130 HP on an engine dyno so it will be interesting to see how numbers translate into on-track performance.