500hp Gurus !!!
06-06-2007, 07:02 AM
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heads and a cam. it's EFI so resurch who has done this and go with an experienced builder. I have tried the external add on crap for the EFi and nothing reall works.
Or do what I did over the winter and Whipple it !
Or do what I did over the winter and Whipple it !
Last edited by Canada Jeff; 06-06-2007 at 07:05 AM.
06-06-2007, 07:40 AM
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Is is EFI or carb..could be either one....if carb..you might consider a 250 blower setup, run about 4psi or so..you could also do some porting on the heads like Jeff suggested and prob gain nearly 50hp..not sure if I would touch the cam or not..those HP500's have great cams in them that work very good and no rev problems, but that is also a choice...btw..stock hp is 500 @ the crank and 470hp @ the prop
After thinking about it..I guess you could only have a efi...carb was made until 2000 and efi started in 1999...so maybe the head work would be a good choice...OR THE WHIPPLE!
After thinking about it..I guess you could only have a efi...carb was made until 2000 and efi started in 1999...so maybe the head work would be a good choice...OR THE WHIPPLE!
Last edited by Bajapred; 06-06-2007 at 07:48 AM.
06-06-2007, 07:56 AM
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The quickest and easiest path to 550HP.... 
well take off the EFI system and intake and sit it on the shelf....then bolt on a single plane and 850 and spin the motor 5800....and yes, I am being serious....If you're going to SC, no need to stop at 550....go whipple or roots with carbs and put up 800+ reliably....
well take off the EFI system and intake and sit it on the shelf....then bolt on a single plane and 850 and spin the motor 5800....and yes, I am being serious....If you're going to SC, no need to stop at 550....go whipple or roots with carbs and put up 800+ reliably....
06-06-2007, 08:01 AM
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I didn't want to lose my efi, if he's anything like me, he won't either. What about just swaping out to Aluminum heads? That should be good for 40 hp.....no?
06-06-2007, 12:14 PM
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Don't waste money on the exhaust, you won't get any more hp. Those Gil's flow great.
If it's a carb, you have alot of options open to you.
If I were you I would fine a good engine guy close to you, check him out (talk to his customers) and then ask him what he would recomend.
If it's a carb, you have alot of options open to you.
If I were you I would fine a good engine guy close to you, check him out (talk to his customers) and then ask him what he would recomend.
