need for speed

[d schuttler]

have a 99 27' checkmate running a 525sc already change gear on blower added stern jack and running a chiller. Getting 78mph lookin to get to the 3 digits. Any advice on what to add to the top side greatly appreciated. heads, cam, bigger blower ?

[powerplay230]

D', what kind of increase did you get from the stern jack? Also who's did you go with?
<<Rookie's guess but for a 22 mph increase that is going to take a lot of Hp.
Thks for info!

[gnarley]

d schuttler:
Any advice on what to add to the top side greatly appreciated. heads, cam, bigger blower ?Give more info about your boat, Everthing! weight, HP, RPM, drive & ratio, prop, hull condition, boost, exhaust....etc....
Your not going to see 3 digits with just work on the top.
[ October 16, 2002, 04:34 PM: Message edited by: gnarley ]

[BOFH]

Also, there are blowers, and there are blowers. How much boost are you running? I have seen as low as 7 lbs, and as high as 27 lbs. More engine details would be nice as well, and have your touched exhaust?

[mbrown2]

The 525SC is based off the 454 Block, and the SC is a B&M 250 (I think)...You would need close to a 1000Hp to push that heavy of a V boat near triple digit. The 454mag is a good block with good internals, but too small to try and reach those HP numbers...you would have to step up to a 540 or Bigger Merlin block and go with an 871 or bigger blower setup with all the right other goodies heads, cam, etc...to get to that 1000HP number.
[ October 17, 2002, 03:37 PM: Message edited by: mbrown2 ]

[HPjunkie]

1000 HP. Big boat...........V bottom= big HP

[Craig]

mbrown2, I agree with everything you say except one thing. The blower on a 525SC is a Weiand 177. Even smaller than the 250! It's made to make about 550 horsepower max. You're right more cubes and bigger blower ought to do it :D
Craig

[mbrown2]

Craig:
mbrown2, I agree with everything you say except one thing. The blower on a 525SC is a Weiand 177. Even smaller than the 250! It's made to make about 550 horsepower max. You're right more cubes and bigger blower ought to do it :D
CraigThnx for the info...I knew I might be off on the SC info...

[Clown]

You should talk to Marc Berman
From florida The man is a nut Ball. But he tought me how to build 1000H.P. Motors!
I will not lie to you it will cost about a little or around 15,000$ For you to make tons of H.P. give him a call and tell him The Kid from chi town said HI!
Bam Marine 1-954-321-0606.

[d schuttler]

ok guys heres the requested info boat weight 4000lbs. running a 30 degree lapp prop,boost runs around 8 - 9 thats with the smaller pully on and is the max the exhaust is mercury upgraded headers. What would you guys think about building a 496 stroker than adding goodies on top (250 blower?,alum heads polished and ported with the cam upgrade.

[gnarley]

QUOTE]Originally posted by Craig:
mbrown2, I agree with everything you say except one thing. The blower on a 525SC is a Weiand 177. Even smaller than the 250! It's made to make about 550 horsepower max. You're right more cubes and bigger blower ought to do it :D
Craig
Craig, I think the 550 HP for a 177 is a little bit conservative. You can build a mild 454 to run around 500 HP with the right cam, head work, pistons & exhaust pretty easily. Then add a small blower & that is good for about 125 to 150 HP at 8 pounds or so says Weiand. That should yield about 600+ HP, easily & maybe even 650-700 HP for a nicely prepared motor or do you think I'm pushing the numbers a little far? Ok so that’s turning that small blower fast but your not spinning it that fast all the time if propped right. Also if you find a way to deliver cool air to the engine like fresh air tube to a sealed air box & water injection those numbers should not be so hard to come to in my opinion.
Granted the HP numbers he needs are still low. He needs CUBES & more HP than even the best that combo would do.