modo
Well-Known Member
Re: In Response to Javi's Post....
fmic = front mount intercooler
there is no said "best". what you want isn't what i might want.
a kb on a pushrod isn't ideal and here is why. the positive displacement blowers do not have the adiabatic efficiency of a cont or turbo. just physics. the discharge temps are going to be higher... much higher. that means less combustible air and more chance of detonation which means lower timing.
people tend to forget them mod motors have that nice air / water heat exchanger where a lifter valley would be on a pushrod. with the pushrod you don't have that option so the only way to cool the discharge temp would be to use water / methanol injection or God forbid hit it with Nitrous... (my take on that is if you need two power adders you didn't build it right the first time)
now a solid cent properly sized (cfm) can make a lot of power. it will take a little more boost out of the cent to equal the same power as a similar sized turbo (taking discharge temps out of the equation for simplicity) due to the parasitic loss of the motor having to turn the blower belt. now that isn't to say that the back pressure from a turbo doesn't have a affect on power but the loss is less.
now imo the turbo setups have their own headaches of they take up a lot more real estate under the hood, hotter under the hood temps, have to cut the car to fit the piping, intercooler.
it does come down to preference realistically. there are positives and negatives to all of them. you can't say what is the best as there is no overall best.
MustangChris said:first:
whats a fmic?
and second:
should we make a "theoretical car" to debate about?
1995 GT 5.0 100% OEM - vortec vs. KB vs. Turbo? or is that just a dumb idea?
this is a ery informative thread, so i dont want to see it die with "just pick the right part" as the nail in the coffin. lol.
alot of us greenys can get some hard-core knowlege here, but we'll have to keep the thread going....
fmic = front mount intercooler
there is no said "best". what you want isn't what i might want.
a kb on a pushrod isn't ideal and here is why. the positive displacement blowers do not have the adiabatic efficiency of a cont or turbo. just physics. the discharge temps are going to be higher... much higher. that means less combustible air and more chance of detonation which means lower timing.
people tend to forget them mod motors have that nice air / water heat exchanger where a lifter valley would be on a pushrod. with the pushrod you don't have that option so the only way to cool the discharge temp would be to use water / methanol injection or God forbid hit it with Nitrous... (my take on that is if you need two power adders you didn't build it right the first time)
now a solid cent properly sized (cfm) can make a lot of power. it will take a little more boost out of the cent to equal the same power as a similar sized turbo (taking discharge temps out of the equation for simplicity) due to the parasitic loss of the motor having to turn the blower belt. now that isn't to say that the back pressure from a turbo doesn't have a affect on power but the loss is less.
now imo the turbo setups have their own headaches of they take up a lot more real estate under the hood, hotter under the hood temps, have to cut the car to fit the piping, intercooler.
it does come down to preference realistically. there are positives and negatives to all of them. you can't say what is the best as there is no overall best.