Dont forget this.. the fuel tank is just in front of the crank. Cant move that too easily. I never measured it, but maybe you should have someone close you into the bilge and measure the clearance between the the hatch and the front of the engine. Do you think the pulley of a roots style charger would clear the hatch? Not concerned about the top, but the front is where it will get tight. For instance, my closed cooling tank comes real close to the hatch.

Vinny,
I just took some measurements. It appears the belt assembly is approximately 3 inches from the tank wall. The crank is above the wall but the water pump dips below the wall. I would assume everything attached to the serpentine belt gets moved forward. Is that correct? Maybe the blower will not work.
Rob

hey rob, every consider a whipple instead... you won't have near the height and I thought they were suppose to be easier to idle than the roots type blower .

Don

Anything less than 28* on your timing will work against you and create lots of heat into the exhaust. Good thing you have inconel exhausts..

As said, you're better to find a cam/boost combo that allows you to run the available fuel at effective timing numbers like 32*.

Accessory drives are available to get you functional at your current crank/fuel tank location. Also, your blower drive on a 250 is in FRONT of your existing accessory belting. Water pump should stay in normal position.

Water injection is great, but you don't see it very often. At low boost and moderate performance, you don't need it.

I'll take a 250 over a 177 any day. It's got extra reserves for when you decide to bolt it on a 502 (a 177 just ain't enough for much of a 502). It's easier to sell if you decide to do that.

Yeah, a 177 will have to work extra hard to get you where you are talking about going, but that's maxed out. You're already going to be above the thermal efficiency curve on it. At the same power levels, you will require higher octane fuel with the 177 than with the 250 due to the mechanical heat you're gonna whip into it. Also, with the additional heat from the 177, 5 pounds of boost will give less HP than 5 pounds from the 250.

If you're looking for 600 HP though, I honestly don't think 5 pounds of boost will get you there with your current setup.

You'll be needing to BORE NOTCH, and spin the motor closer to 5600.

1050 carb is a lot of carb for that motor, but it's very tunable and well suited to the application.

go get em.
mc

As I said, I have almost no experience with blowers. The most I have done with them, is take them off my friends 575SC's and send them to the blower shop for rebuild. If my memory is correct, on his 575's, the blower belt is the outer most belt, the accessories are in there stock location. Sounds like its going to be time to get out the butter to squeeze this engine in.

I think I am putting my supercharger pipedream on hold until our current motor tires out. Then we will either rebuild and supercharge or trade it in for natural big cubes.

I run a similar setup with a ProCharger. I have aluminum Edelbrock heads and a more radical cam, also upgraded fuel system to include injectors.. With a 7lb pully made an easy 710 HP and 727 ft lb torque. Not a bad way to go. Tyler dynoed it talk to him.
Bob

Hey Don how are you? You make a good point. I like the old style theme for the Checkmate. A roots sytle carbed blower maybe less efficient and a little more likely to detonate but they look cool and our "cost effective"(at least upfront which is important for the marriage). Have you put many hours on the new power? Do you plan and pulling the AO to Clinton anytime soon? Hope all is well.
Rob

[QUOTE=RBeyer;2571545]I run a similar setup with a ProCharger. I have aluminum Edelbrock heads and a more radical cam, also upgraded fuel system to include injectors.. With a 7lb pully made an easy 710 HP and 727 ft lb torque. Not a bad way to go. Tyler dynoed it talk to him.
Bob[/QUOTE
What prop are running now with 700HP? We still use your old 24 Hydromotive.

Vinny, yes it can be done seen a couple done, I have pics showing what has to be cut behind the seat..but yes, very close for sure..there are 2 blown 251's running around me with big blowers, one ran well over 100 at the radar run a year ago...the other never straitened out but ran in the 90's, Rob