Dont throw out those high dollar High Pressure fuel pumps yet

[flyingfrizzle]

Originally Posted by Bigshrimpin

FF - From what I've read if you stay under 7000rpm then you are better off with the 4 petal front. I just sold a 7 petal 2.5L front 1/2 last week on ebay. I'll keep my eyes out for another one. 2.5L 7 petal fronts are tough to find cause they were only on the 1991/2 2.5 with the bottom guided rods, a 240 sportjet, promax, or racing stuff. Can't wait to see the end result . . . that boat will fly. Thanks for the info on the hi pressure pump. You might want to pull the head on the 110psi side and just take a look. Worst you'll lose is a few bucks for a new head gasket.

I have read that too about the 5 petal vs the 7 petal, I might just go mild with these 2 bocks/motors I have now and use them on the 25 seafari instead of the race boat. Stick with the 5 petal fronts on them and wait to find a nice pair of Promax motors to go all out on for the go fast hull. I really don't want to turn over 7000 rpm with the motors I have now due the side pined pistons. If I can find some promax or 280/260 nic blocks I might try to get some forged top pined wizard pistons for them so I can turn it up to 8000-9000. The motors I have now I will probably just use the verex pistons in them and try to keep them more reliable if I have to bore and replace the factory ones.


Far as the lower compression in the one hole, I was to curious and after I did the decarb it read the same and got no better so about 2 weeks ago I did pull the heads on that motor and looked at the bore. All the holes looked like new but that one. It had some light streaks up and down the wall that were very faint and light around 5 o clock and 7 o clock. They were visible to the eye but you could not feel them by touch. Most of the time you can catch your nail in them but if you were a bind man you would not know they were there. All the other holes have nice hone marks and you can see the hone marks in the lower one too still. I think I am going to pull that one and hone it back out and change the rings on all of the pistons to new. If there is any marks on the piston I will change the one or maybe all over to the verex coated ones.