going to install a supercharge

[SunshineAcid]

good call huguetpj

[Tx-Sx-FS]

man after reading all the info on this project i wanna hear hows its coming..sounds like shop is bsing...whats the difference between hardbody and whatever else there is (how i know which i have) and why does his engine run higher in 3rd?

[bedbull]

hi guys JUST got the truck back from the shop sooo hopefully you all will hear from soon

[Chezedik]

The Hardbody is the pickup, it had a SOHC motor, which the 240 only had for 2 years. Then the 240 went DOHC. The intake and exhaust manifolds are different from one application to another on the single cam, but they are interchangable with only minor modifications. That is why we are all so interested, because once he figures it out, the rest of us can follow.

[bedbull]

here is picture

[bedbull]

is this better

[bedbull]

another angle

[bedbull]

this another picture

[Chezedik]

Is it still the corolla unit?

[bedbull]

no its a unit from the 1g engine

[JonnyB4Real]

you could get a pulley for like 16psi or somethin

Dont know if there is a 16 psi pulley in existence but Im not really a supercharger expert. That would be a tiny pulley

[NateDogg]

Is that Mercedes? What is a "1g engine"?

[bedbull]

its a rear wheel drive toyota out of japan named mark 11

[Chezedik]

What is the displacement of the charger? What is the displacement of the engine it came off of, and then what boost did it run on that engine.

[WDRacing]

I'm toying with the idea of using the Kenne Bell blower for the 351 and mounting it directly on top of the engine. It would require a custom hood, but it will be quite efficiently producing 20 lbs of boost....with no lag. That would make a perfect daily driver.

WD

[sil80drifter]

i always wanted to be peeling out while idling at a light. in fact i dream of it. make it so!

sil80

[Chezedik]

I think 20lbs is a little much for a KA w/o some major internal work, and a drastic drop in compression. But it is a noble effort. Plus, I think it would really ***** with the mustang guys to have a cowl hood like theirs.

[bedbull]

ok ok the 1g engine is a 2L engine with about 8lbs boost ...well i drove it today a little i pressed down on it and the truck went two sides the road so i had to back off ...anyway ...i have some more tuning to do but dont have the time but as soon as i find myself with some time ill do it soo till next time

[WDRacing]

I think 20lbs is a little much for a KA w/o some major internal work, and a drastic drop in compression. But it is a noble effort. Plus, I think it would really ***** with the mustang guys to have a cowl hood like theirs.

You have absolutely no idea who your talking to do you??

[huguetpj]

You have absolutely no idea who your talking to do you??

No, he does not

[Chezedik]

No, I guess owning 2 and being inside of the engines does not qualify me as an expert, however, I think we can all agree that as a basic assumption, very few engines can handle 20lbs of boost above the standard 14.7 lbs of ambient air pressure. Because it can be assumed that the resulting pressure in the combustion chamber would cause a large strain on the die-pressure casted pistons and cast rods. You see, when a piston is pressure casted, it is similar to a forging, in that it's increased density is it's point of strength, the exception being of course, that since it is still casted, it is prone to having MORE casting failures. This is the weak point of the KA motor, since the block is cast-iron, and the crank is girdled. Nissan has incorporated squirters for the pistons to help ease any damaging effects heat might have, but this would most likely not fix the problems that 20lbs of boost would bring. But then again, maybe you were the first to think about doing this, and maybe I have never researched the issue. Why do you come to a forum when you do not want to learn?

[Chezedik]

Oh, and by the way the displacement on a blower designed for a 351, would probably be enough to shell the motor at idle since the difference in the blowers displacement, and the displacement of your engine is so vastly different (the blower is bigger). Many great books can be had on the subject, and are probably available at your local library. Of course, this was the point of my college education, so I did it the hard way.

[TrunkMonkey]

Oh, and by the way the displacement on a blower designed for a 351, would probably be enough to shell the motor at idle since the difference in the blowers displacement, and the displacement of your engine is so vastly different (the blower is bigger).

when it comes to supercharging, bigger is always better.

-demetrius

[Ghettokracker71]

I don't really feel like reading all this in the thread. I want a clutch-type blower....boost on a button I think thats be beast to kick up the boost enough to justify a FMIC ,heh .

[Chezedik]

Yes, bigger is better to a point, but if the displacement of the blower is larger than that of the engine, this can create problems. That is to say, how do you force 150 cubes into 146. Something has to give. It will either be the engine or the blower. I will certainly agree that a supercharger with a larger displacement is good, so long as it does not get to near the capacity of the engine. The engines capacity is assuming that in 4 strokes on all cylinders, it is capable of consuming that much air. But blowers are rated a little differently and with each rotation it is capable of pushing that much air. So for one cylinder to try to take on 150 cubes, when it's capacity is only 36.5. Something is not going to work. And of course, boost is forcing air into an engine and so I would suspect that anywhere between 35 and 40 would be ideal, but too much can certainly be too much. Otherwise, dynamic compression becomes so high, that the engine can not overcome it, or worse, you cannot buy fuel with a high enough octane.

[TrunkMonkey]

Yes, bigger is better to a point, but if the displacement of the blower is larger than that of the engine, this can create problems. That is to say, how do you force 150 cubes into 146. Something has to give. It will either be the engine or the blower. I will certainly agree that a supercharger with a larger displacement is good, so long as it does not get to near the capacity of the engine. The engines capacity is assuming that in 4 strokes on all cylinders, it is capable of consuming that much air. But blowers are rated a little differently and with each rotation it is capable of pushing that much air. So for one cylinder to try to take on 150 cubes, when it's capacity is only 36.5. Something is not going to work. And of course, boost is forcing air into an engine and so I would suspect that anywhere between 35 and 40 would be ideal, but too much can certainly be too much. Otherwise, dynamic compression becomes so high, that the engine can not overcome it, or worse, you cannot buy fuel with a high enough octane.

do you know how to properly size a supercharger? regardless of which style blower you go with, an engine's displacement isn't even a factor. and since boost is controlled by how fast the blower is spun, the blower's size doesn't determine how much air is forced into the engine. the rule of thumb is to find the correct compressor for the power you want, then choose the next size up. why? usually the larger the blower the better the efficiency, you'll reach your desired boost level earlier in the rpm band, it'll be less load on the engine since your pulley will turn slower, and you have room to expand should you decide you want more power.

the only real obstacle with trying to use a big blower is space.

-demetrius

[90lkn4swp]

I dont post much but everything ive read on forced induction has led me to believe that a supercharger or turbo forces more air into the combustion chamber than what the engine would normally consume naturally aspirated, hence the name forced induction.or is it just more oxygen so the intake combusts cleaner and more even? I dont think so but I may be wrong **** it im going back out to the field tomarrow anyway and I need to get drunk.

[90lkn4swp]

nevermind demetrius already wrote on this

[WDRacing]

Chezedik,

I happen to know quite abit about forced induction. I have quite the extensive library already, but thanks for the thought.

I'll make this brief, If your going to argue with the mods and members of the site, please try and atleast get your facts straight. Your above posts are jumbled 1/2 truths at best. If anything your only helping to confuse younger less educated members. I'll debate forced induction with anyone at anytime, so feel free to post away, just get your facts from a better source.

WD

[Red Lightning]

What I don't get is how can a root type blower produce full boost at low psi? I understand that a centrifugal s/c makes full boost at redline, that make sense to me. But have do a root s/c make full boost at 3000 or so rpm? Thanks.