Thunderstruck hits 90 mph
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Thanks for the kind words. The motors are 500HP short blocks, 502 ci, with AFR aluminum heads, custom cams, Edelbrock Vic Jr intakes, 1" spacers, 950 cfm racing Holleys, 9.6:1 compression, stock gil exhausts (dry) and Crane
HI-6M ignitions. This work was done in early 2005. I had to install closed loop cooling after some corrosion issues on the heads after the first year which put me out of commission for a while along with the hurricane.
Took two sessions on the dyno but finally got 595 hp at 5500 rpm, no accessories, with the dyno supplied collector style exhausts so they are lower hp than 595 in the boat.
The boat woke up with the modified motors, acceleration is unbelievable and I picked up 5-6 mph but my slip was really high, 15-16% at 5550 rpm (86 mph).
After trying props, Throttle Up recommended 1" drive spacers which I tried but did not lower the slip.
Finally I installed some Teague LWP nose cones three weeks ago. Slip went to 9.5% (5450 rpm, 90 mph). Cruising speed went up 2 mph now I am running 60 mph at 3600 rpm.
Overall a fun project, I learned a lot but very expensive.
HI-6M ignitions. This work was done in early 2005. I had to install closed loop cooling after some corrosion issues on the heads after the first year which put me out of commission for a while along with the hurricane.
Took two sessions on the dyno but finally got 595 hp at 5500 rpm, no accessories, with the dyno supplied collector style exhausts so they are lower hp than 595 in the boat.
The boat woke up with the modified motors, acceleration is unbelievable and I picked up 5-6 mph but my slip was really high, 15-16% at 5550 rpm (86 mph).
After trying props, Throttle Up recommended 1" drive spacers which I tried but did not lower the slip.
Finally I installed some Teague LWP nose cones three weeks ago. Slip went to 9.5% (5450 rpm, 90 mph). Cruising speed went up 2 mph now I am running 60 mph at 3600 rpm.
Overall a fun project, I learned a lot but very expensive.
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Did you end up leaving the drive spacers in or did you remove them. We are doing a 32' A T with some motors that made around the same power that you did so any info we can get will be great.
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