Thicker head-gaskets... Lower comp ratio. There is a formula there somewhere...google.I found a used novi 2000 on craigslist and need everyones help. It was just rebuilt and a 13 psi propeller was installed. How do I inspect charger to make sure it's good. 2 question is this unit a good match for my set up? I have AFR 185's with 58cc, the block was decked by previous owner resulting in 10.6:1 compressoin. Thanks for the input.
Thank you for info, should I be ok running nitrous?http://www.stangnet.com/mustang-forums/threads/buying-a-used-supercharger.871820/
Please see my response in the link above.
If they are actually saying that the impeller was replaced with a 13psi one they are either blowing smoke or have no idea what they actually talking about. This is red flag number one. The impeller is te impeller. The pulley size would determine impeller rpm thus resulting in more or less boost.
Secondly I feel that your compression is too high for forced induction. There is no room for safety with a tuneup on a street car with that much compression. You could play with head gasket thickness to get the compression down. I've gone as far as running a .120 thick cometic to lower compression before
An impeller swap can increase a centrifugal chargers efficiency, thus allowing for a higher volume of air per revolution, which in turn would increase manifold pressure without swapping out the pulley. If that it actually the case in this instance, I can't say.X2 on the 13psi impeller BS. You change the boost with the pulley not the impeller. However, 10:6 to 1 and a blower = BOOM
You will need at least a meth injection system and as mentioned thicker gaskets to lower the compression. IMO you are better off with Nitrous at that compression.
Thank you for info, should I be ok running nitrous?
Not really confused at all Stangnet Staff Brian just ignorant when it comes to boost. Thought this would be a good place to get good information. Going with a new bottom end which will produce lower compression eventually. So I am going to spray the car off the line and use boost the rest of the way, what do you think.An impeller swap can increase a centrifugal chargers efficiency, thus allowing for a higher volume of air per revolution, which in turn would increase manifold pressure without swapping out the pulley. If that it actually the case in this instance, I can't say.
Plenty of cars running blowers with compression out there. Pull some timing out of the top end of the tune and keep the tank full of 93-octane and he shouldn't have a problem.
Doubt he'll want to pulley it for 13psi though. I'd keep it in the 8-9psi range.
IMO, a Novi 2000 is wasted on that engine. He'll never spin the power to it's full potential with that compression ratio. Not saying it won't work, but he'd do just as well with something a little smaller IMO.
Yes. Nitrous and compression go hand in hand.
Sounds like you have a lot to think about. I'd sit this one out and decide what you really want to do with your car.
I think you'd better plan on upgrading that block along with the bottom end. You use boost and spray together, you're going to not only make big power levels, but put a lot of stress on the engine block along with its components too.Not really confused at all Stangnet Staff Brian just ignorant when it comes to boost. Thought this would be a good place to get good information. Going with a new bottom end which will produce lower compression eventually. So I am going to spray the car off the line and use boost the rest of the way, what do you think.
An impeller swap can increase a centrifugal chargers efficiency, thus allowing for a higher volume of air per revolution, which in turn would increase manifold pressure without swapping out the pulley. If that it actually the case in this instance, I can't say.
Plenty of cars running blowers with compression out there. Pull some timing out of the top end of the tune and keep the tank full of 93-octane and he shouldn't have a problem.
Doubt he'll want to pulley it for 13psi though. I'd keep it in the 8-9psi range.
IMO, a Novi 2000 is wasted on that engine. He'll never spin the power to it's full potential with that compression ratio. Not saying it won't work, but he'd do just as well with something a little smaller IMO.
Yes. Nitrous and compression go hand in hand.
Sounds like you have a lot to think about. I'd sit this one out and decide what you really want to do with your car.
Put in some colder plugs, bigger fuel pump, a decent kit with a window switch and a tune and he can safely add anywhere from 75-150hp. Zex makes an easy plug and play kit that takes alot of the guesswork out of the setup.
I would feel more comfortable with the compression under 10:1 and really comfortable under 9.5:1. If you did decide to add boost I would want to see it only 5-6 lbs. race car and street car scenarios are worlds apart. While some race cars have very high compression and boat loads of boost this takes careful consideration .
YOu will be fine so long as you keep the timing conservitive, 21 total or so for something like thatI'm considering adding boost to my milled .030 - gt40p heads, think I'm around 10:1 also?? Stock deck block. Could I get away with a V3 Si - 8psi set up??
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