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Boy my top gun. Certainly ain't my little rocket ship

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Boy my top gun. Certainly ain't my little rocket ship

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Old 07-16-2015, 03:49 PM
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Originally Posted by MILD THUNDER
Ditch the 250 blowers for some 14-71s rob.
fixed.
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Old 07-16-2015, 05:26 PM
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FK , it. Found this one for sale.

Complete 18-71Kobelco Superman with all.....all is like new Supercharger make 52 pounds@8000 at 29 over
LOlllllll.
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Old 07-16-2015, 05:38 PM
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Originally Posted by frickstyle
fixed.
14's will work too! The 10-71 is nice fit for a 540 though. A good tight 10 will do 7-8psi on a 540ci at 1:1.

Or, if you wanna spend a little more....go screw....with the old school look like Mike Tkachs mills
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Old 07-16-2015, 07:15 PM
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Think the engines are even making 700hp................
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Old 07-16-2015, 09:14 PM
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Originally Posted by ROB FREEMAN
540 with 250 bum blowers , :-(. I guess I new it wasn't going to be as quick as my fountain
What pulley is on them? It might be time to pulley up
Mild weren't you making close to 700 with your 250's on your 454's?
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Old 07-16-2015, 10:10 PM
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Originally Posted by jbraun2828
Takes about 900- 950hp to hit triple digits
Takes more like 1000-1100 a side ... Buddy has arnesons and 1020 sees just over 100
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Old 07-16-2015, 10:42 PM
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Originally Posted by Rookie
What pulley is on them? It might be time to pulley up
Mild weren't you making close to 700 with your 250's on your 454's?
I never dynoed them with the 250 blowers, only the 420's. I did pick up a solid 4-5mph by switching to the 420s and fresh rebuild., which dynoed at 804hp. 700HP with the 250's is probably about right. Not a whole lot changed in the engines when I rebuild, other than whoever did the old valve job sucked. The valve seats were ground way deep. So had all new seats installed, a nice valve job/blending, and heads milled even. Prior to that, the cc's were all over the place. Then switched from a 250 B&M with single 1050, to a 420 B&M with twin 850's and new hard parts.

My buddy had a Top Gun, straight bottom. 598's with 250 blowers. The pulley's he had, made 7psi on mine, but on his, about 3 lbs lol. His dyno'ed at 800hp, and his boat ran mid 80s. He later swapped those blowers out, for 10-71's with chillers. Engines made right at 1000hp. But they never went back in the Top Gun.
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Old 07-16-2015, 11:28 PM
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Where do you boat? I see a lot of "shore" . They feel like driving a school bus on flat water. You need some Lake Michigan.
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Old 07-17-2015, 03:23 AM
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Originally Posted by ICDEDPPL
Where do you boat? I see a lot of "shore" . They feel like driving a school bus on flat water. You need some Lake Michigan.
I think that pic is on lake Winnebago ..That lake can go from glass to 6 footers in 10 minutes. Its not very deep so the waves are very close together. its like riding a crossed a freshly plowed corn field. Very Very hard on parts. You can't throttle back fast enough when your riding on top of 4 waves at a time . The props just zing, then the parts fly... LOL I am sure Rob will like the ride much better than his smaller boat
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Old 07-17-2015, 04:15 AM
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Originally Posted by ROB FREEMAN
Took first ride in the top gun. For having 700 s it certainly ain't no ripper. :-). My 35 lightning scares me. This thing is smooth and great. Just don't give me that c ya later feeling. Blues after one ride. How much power does it take to move these tanks. 98 strait bottom with scorpion 700 blower motors. 540 with 250 bum blowers , :-(. I guess I new it wasn't going to be as quick as my fountain
get rid of the 250s..thats hurting you..look for a pair of 1071s and step it up to 850s and go have fun..
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