ok i know i spoke with someone out there before about superchargers. anyone know about pulley raitos and boost and compression. The reason why is that no one can really tell me at holley on what boost i would be running with the in box set up. the upper pulley on the charge is 3.8 inches and the crank is 6. i know at 6 lbs of boost with 9.5:1 will be about 13.5:1 but like i said no one can tell me what boost would be with those pulleys. all ears here
you're not going to get a straight answer on that one. A bone-stock 302 might see 8 lbs, but a motor that's built for a blower might only see 3-4 lbs. It will be different on each and every engine due to differences in intake valve opening rates, duration, overlap, etc. Just an example, a '95 powerstroke diesel (444 inch) can only achieve around 10-12 psi boost from the turbo, but on my 302, it can bury the needle past 25! Not too good on head gaskets though
Can't be predicted with any accuracy unless an identical engine setup has been done. There is crank pulley size and blower size to consider as well as the blower design and throttle opening. If a blower setup is blowing into a tight intake track the boost will tend to show higher than on a better flowing intake under the same conditions. This can fool people into thinking the higher boost is making more power when it is only showing a restriction (air has no were to go) as opposed to a better flowing setup with the same pullies. I run a K.B. with a 2-3/4" blower pulley and make 6 lbs boost with a large crank pulley but this blower comes onto boost under 2000 real easy and does not have to wind to 3000 rpm to get full boost. Make the engine fell like it's a big block 460.
okies thanks for info... yeah most seem to tell me it depends. I guess who knows if the pulleys they gave me will work or not. i guess im just gonna have to start the thing up and find out.. BOOM! Well if that happen i'll do it right the second time. well i have more things to worry about before even starting it up. just found out tonight while working on it that the freakin blower belt it came with is too small i mean what the heck! thought this thing was supposed to just bolt right on! yeah right..how many times have i heard that b4. which i might ad the hood i got form us body don't fit worth a jack either... oh well more time and money! well i guess im destin that nothing is gonna fit right on this thing. I gotta rig up a bunch of brackets.. change belts, fuel lines and hoses just to make everything fit. the life of hot rodding i guess! if there are any other insites let me know... ear open hear.. get it hear
I heard that b4.... The guy that did all my chassis work made a interesting point, he said: How can you expect them to manufacture a "bolt-on" for a 33 year old car? then he added: there is no such thing as a bolt-on for a race car. I know that your car (Maverick Man) is not strictly a race car, but I think the principle is the same. Once again, its just another day in the life of a hotrodder.
the only thing that truly bolted in (as far as modifications goes) was the powerglide trans in the bracket car. It was expen$ive though, but well worth it!
