DISTURBED said:
SyTy Speed Shop said:
Ok, I was thinking I'd just buy a set of the SCAT pro comp I-beams with the ARP bolts since I hadn't been able to find deal on a god set of the GM Dimple rods plus everyone says don't bother buying and reconditioning the GM rods cause the aftermarket rods are better.
Well today I scored a set of the GM Dimple rods, they have brand new ARP 7/16 wave loc bolts, new Manley bronze bushings and they have been resized, magnafluxed and the beams polished and they are weight matched at 842 grams. I got them for 200 bucks so I think I got a great deal and these are originally from a 502 crate engine and are the GM 4340 heavy duty rods they currently sell for 130 each so I think they will be just fine for my build at 6500 max rpm.
I also scored a deal on a slightly used quick fuel 750 blow thru carb that was only used a few months, it's off Daryl Graffs twin turbo LS powered boat that made 800-850 on 10psi so I think it will be a great starting point for my setup, got the carb for 300 bucks!!
It's all starting to come together!
How much boost are you thinking it will make?
Well the D1 is rated at a max boost of 32 PSI, the pulleys i have, 7.75 crank and 3.70 blower will put the impeller speed at 60,400 at 6500 and max speed is 65K. I really dont know where my boost psi will be, but on a 454HO Merc Marine engine with a carb, using a 7.75 crank and 5.0 blower pulley it makes around 5-6PSI, so im thinking my pulley setup should be in the 10-12PSI range and around 700-750 max power range, but really its all a guesstimate.
My plan is to use a bypass valve and keep the boost around 5-6PSI in the beginning to get the tune dialed in, and also allow me to get used to the boat, and see how the boat likes the power and slowly raise the max boost as i go along, at this point im thinking im going to limit my max boost to the 10-12 range, but will have to see how it handles the boost once its up and running, eventually im also going to ditch the stock iron heads for a set of AFR's so that will change things as well on max boost and tune up.