considering a supercharger

[DustyR/T]

I am building a block to take quite a bit of boost and I am considering a supercharger (Vortech type) for size compatability and for instant boost as well. I am curious to how much PSI I could obtain on my size motor and how soon would I feel (hear) the boost. If anyone has used this setup or is working on one, or knows someone who has/is, can feedback be sent my way please? I am looking for around 300whp and 350-400ft/lbs. I don't think that is unobtainble by all means. I appreciate feedback thanks.

[Ntrain2k]

You wont see instant boost with a vortech style blower unless you are seriously overdriving it.

Instant boost is something you see from a roots style supercharger.

[Shadow24V]

there are a bunch of users on club3g.com that have done the RIPP S/C (vortech unit) and were achieving ~300hp/tq on about 8psi. i think the kick in was around 2500-3000 rpms IIRC. im thinking of getting the roots M90 for my 24v but who knows

[mwinkle353]

sure there are. But have you seen the dynographs on these setups? Too peaky and not enough low/mid range torque for my tastes. But then again, who needs that much torque on a FWD car?

[m90daytona]

if you are looking to make serious hp a roots or screw style is better. a vortech unit will probably get you close to where you want to be but if you ever decide its not enough theres not much you can do about it.

[Ondonti]

vortech superchargers are a lot more expensive then a turbo..............you are looking at 2000 bucks

Also they have horrible boost characteristics. you wont make peak boost till redline and therefore you wont be making torque.

I would prefer a positive displacement supercharger.

Yeah I wrote this like 6 hours ago but my internet died.

[Harvii]

My Eaton M90 had instant boost =) Pretty much the same PSI from 1000rpms-revlimiter. Good luck getting that with a vortech unit. Plus the price difference is HUEG!

[87turbodance]

I have had an Eaton M90 in mind for a long time. I have this insane plan that may or may not work.

I want to swap the heads on my 3.0 to a set off a 2.5 24v (if it's doable) than if you can picture the 2.5 intake and how it goes straight back over the rear valve cover. I was then thinking about mounting the M90 in a similar position to what Harvi did except upside down. Then shop off the plenum on the 2.5 intake, shorten the runners a bit, then weld on a new sheet metal plenum that bolt to the now upside down M90.

Add Megasquirt 2 Extra, water injection, bigger injectors, Walbro, some reground cames, custom headers and 3 inch exhaust and you could have one hell of a motor.

That is my plan for my Spirit that will begin next fall. Of course I'll have to complete the A543 swap at the same time

[m90daytona]

Quote:

Originally Posted by 87turbodance I have had an Eaton M90 in mind for a long time. I have this insane plan that may or may not work. I want to swap the heads on my 3.0 to a set off a 2.5 24v (if it's doable) than if you can picture the 2.5 intake and how it goes straight back over the rear valve cover. I was then thinking about mounting the M90 in a similar position to what Harvi did except upside down. Then shop off the plenum on the 2.5 intake, shorten the runners a bit, then weld on a new sheet metal plenum that bolt to the now upside down M90. Add Megasquirt 2 Extra, water injection, bigger injectors, Walbro, some reground cames, custom headers and 3 inch exhaust and you could have one hell of a motor. That is my plan for my Spirit that will begin next fall. Of course I'll have to complete the A543 swap at the same time

sounds good in theory but your talking about doing alot of things that have never been done. i am trying to s/c my 3.0 right now and i am just beginning to realize all the things i have to fab. list so far

s/c bracket
fuel rail
fuel lines for sfmu
fuel sending unit for walbro 255 lp/h
power steering pump dipstick and tube
upper plenum
throttle body and linkage for jeep t/b
intercooler piping
intercooler brackets
alternator bracket
megasquirt location and harness
coil bracket

not to mention o2 bungs, exhaust stuff, wiring for gauges and wideband etc...
thats w/ the stock motor. your talking swapping heads, intake manifold, custom headers, throttle body and who knows what else.

[Ondonti]

I dont see the purpose of the headswap when using an m90.
It only pushes so much air at a certain efficiency level.

[m90daytona]

Quote:

Originally Posted by Ondonti I dont see the purpose of the headswap when using an m90. It only pushes so much air at a certain efficiency level.

you can get alot of air from an m90. the one i have put out 25psi on a thunderbird and if you shave the nose, put a smaller pulley on and weld the case you can get 30. ported heads help any boosted application no matter how efficient it is.

[87turbodance]

Quote:

Originally Posted by m90daytona sounds good in theory but your talking about doing alot of things that have never been done. i am trying to s/c my 3.0 right now and i am just beginning to realize all the things i have to fab. list so far s/c bracket fuel rail fuel lines for sfmu fuel sending unit for walbro 255 lp/h power steering pump dipstick and tube upper plenum throttle body and linkage for jeep t/b intercooler piping intercooler brackets alternator bracket megasquirt location and harness coil bracket not to mention o2 bungs, exhaust stuff, wiring for gauges and wideband etc... thats w/ the stock motor. your talking swapping heads, intake manifold, custom headers, throttle body and who knows what else.

I definately know what's going to be involved. I've been planning this for a while.Dont expect to hear about the motor running until 2008. I just thought I'd post my thoughts in case anyone had a surplus of money and time and thought they might be a guiinea pig for me

[Ondonti]

Quote:

Originally Posted by m90daytona you can get alot of air from an m90. the one i have put out 25psi on a thunderbird and if you shave the nose, put a smaller pulley on and weld the case you can get 30. ported heads help any boosted application no matter how efficient it is.

PSI doesnt mean airflow.

Even superchargers have an efficiency map you need to pay attention to. Just like a turbo.

[Shadow24V]

^^+1 very true im not sure how the M90 compares CFM/PSI to a vortech unit, but with the 24v bottom end, im restricted to a save level of 8psi. if i get enough cash over semester break, im going to try and get an M90 for my application and see if i cant boost my 24v duster this spring/summer.

im still iffy on the 24v heads on the 12v block, i have a 12v block but no spare 24v heads *shrugs* i have an old 24v timing belt somewhere if you want me to measure the length and count the teeth. id be more concerned about the oil and coolant passages between the heads. not to mention the header and intake manifold bolt pattern differences. if you have any questions on the 24v heads/motor etc, feet free to ask me, since i got one to reference

Good Luck in any case, i hope you get it running with less hassles than ive hit lol

[Ondonti]

I just would think if you are going to all that trouble then you would put some thought into your supercharger.

They have compressor maps just like a turbo. How would the m112 compare to the m90, etc.