Custom sc for 4agze - Toyota Nation Forum : Toyota Car and Truck Forums

bsee · 03-19-2005, 11:08 AM

I am developing a centrifugal supercharger kit for 4agze. The sc is made in Germany. Advantage of the sc is that it has very high step up ratio(10:1) and also a very high impeller speed ( 90,000). Boost will come instantly for 4agze and the power goes up all the way to red line.

The kit consist of custom bracket, pulley, air and oil hose.

The kit will cost about USD 2500.00 introduction price. Price will drop if there is alot of respond.

email me for more information.

bcq771@yahoo.com

Rust_bucket · 03-19-2005, 06:03 PM

engine managent?

bsee · 03-20-2005, 12:22 AM

Dont really need one, 4agze ecu's and injector is really sufficient up 200 hp. 4agze ecu's is a really advance and good ecu, wasted spark system.

bsee · 03-28-2005, 07:24 AM

I have done a simulation test with TM III 12 on a 4agze by using the engine analyzer software. The result and specs are shown in link below;http://f2.pg.briefcase.yahoo.com/bc/bcq771

toyotaspeed90 · 03-28-2005, 01:26 PM

so it looks like you lost a little low end torque.... gained almost no higher end torque and gained some higher HP......

bsee · 03-28-2005, 08:35 PM

Yes! but it is still better than the stock 4agze sc 12 supercharger. If you were to have stock 4age cams or adjustable cam pulley it will better.

toyotaspeed90 · 03-29-2005, 03:16 AM

or you could find an sc14... keep the magnetic clutch..... and get similar numbers.... lower overall HP but more torque....

bsee · 03-29-2005, 04:08 AM

Sc 14 is good but it is too heavy, sc 14 will lag alittle before boost come in. Sc 12 and sc 14 are good for first and second gear but when you start to shift to 3rd gear, there where's the problem comes in, the ecu's will cut the magnectic clutch. The s/c will only spin max up to 6000 engine RPM that is all.

If you remove the magnetic clutch and make it rev all the way to red line then the next problem is that the s/c will not even last a month. You will be making the s/c spin out it max rpm. The higher boost you r making with the roots charger the less efficient the s/c is because it is generating alot of heat. Your power gain will be less and less.

toyotaspeed90 · 03-29-2005, 02:19 PM

not true...... i have an ae101 4agze with the stock sc12 in my 87 mr2 running on megasquirt. the clutch is setup hardwired on a switch.... i turn it on and off as i please. along with me, there are several people on the mr2 forums that are running the same ae101 motors (which use a larger crank pulley getting boost up to 10psi or so) ALONG with some that are running even larger pulleys (like the nevo pulley) and smaller s/c pulleys and will block off the ABV..... all to gain boost..... people run them higher than 6000 all the time.... including me... and yes, in 3rd gear..... really, though, 3rd gear doesn't have any longer time above 6,000 than any other gear with an E series transmission.... ie, the E series trannies have very long 1st and 2nd gears as well...... in any case, my sc12 is holding up just fine.....

the "power drop" you may be thinking about with a stock sc12 around 5500rpm's and the stock ecu is because the knock sensor is way too sensitive... the sc12 shakes a bit more above 5500 rpm's and the knock sensor registers the vibration as knock... reducing the power of the motor....... this is something i don't see as i have no knock sensor with megasquirt......

bsee · 03-29-2005, 10:05 PM

U r a smaller aftermarket crank pulley. Have you ever hit the red line with s/c 12 before. I am using a 7 inch crank pulley and i can hit boost at 5500 RPM without an intercooler. I My s/c 12 is running 18 psi of boost. If you are using a hug crank pulley and ur making a 10 psi of boost then ur s/c is a problem. I have a one way swtich installed on to the s/c which make the s/c runs all the way to red line which is 7600 RPM.

Mine to tell what is the size of ur crank pulley and magnetic clutch and also how much boost that u r making at what RPM?

toyotaspeed90 · 03-30-2005, 01:14 AM

mine are just the stock ae101 pulleys...... which is 10psi...... 18psi on an sc12 is unheard of..... that i know of not a single mr2 owner has got theirs over 15psi..... and there are many corolla guys who tend to wander over to mr2oc because there is such a larger following for 4agze's over there than on corolla forums.... something tells me there is something wrong with your boost gauge if you're reading 18psi with an sc12... and especially if you're not getting boost until 5500..... i see boost instantly (ie, around or under 2,000 rpm's)

first gen 4agze (bigport, 8.0:1 pistons, afm, dizzy) was 6-7psi.... the only one to reach the US
second gen 4agze (bigport 8.9:1 pistons, afm, dli) was 10psi..... only found in FWD ae92's (early)
third gen 4agze (smallport 8.9:1 pistons, map, dli) was also 10psi.... only found in late ae92's and ae101's

i really have a hard time you're getting an sc12 to reach that amount of boost..... 15psi is reaching the limits that the rotors actually seal in the case......

bsee · 03-30-2005, 02:08 AM

Stock 4agze should be getting about 7-8 psi of boost. I will send avi when i have those boost taken ok. Pls give ur email add. We r getting using bar instead of psi in our region and we are boosting where from 0.5 bar to 0.6 bar which is about 7-8 psi.

I think u r having a HKS 165mm pulley, 10mm oversize.The cusco pulley kit can already provide boost above 14psi. Theirs is about 175mm and mine is 178mm. U will get more boost if u r not using with an intercooler. Anyway i m using a big port engine with hybrid map system on it.

My boost max out at 5500rpm. boost cut faster than rpm cut. Make the car have to shift gear at 5500rpm, so have to install FCD to the it. Problem is that we rev the s/c too much until it is loosing boost, making whole lot of noise, but still able to hit boost cut in 6800-7000 rpm.

toyotaspeed90 · 03-30-2005, 02:14 AM

you may get more boost without an intercooler, but you will lose power because the intake temps will rise dramatically..... especially since it's a supercharger.....

like i said, ae101's are 10psi stock..... i have all stock pulleys.... trust me, the aftermarket pulleys could not have an EDIS ignition trigger wheel welded to them as all the aftermarket ones i've seen are aluminum (except for the HKS pulley..... which mine is not...)

and like i said.... the early model 4agze (mr2) was 6-7psi of boost stock..... they had smaller crank pulleys on them and larger s/c pulleys than the FWD versions

bsee · 03-30-2005, 02:28 AM

I have been modding so much 4agze, still i have meet a 10psi 4agze before. Is anyone else making that kind of boost with stock crank pulley?? I would like to know. Something interesting here.

Yes i agree with that i am not making alot of power in the top end because i didnt use any intercooler. What type of boost meter u have there, i m using sard boost meter. The MR 2 make lesser boost lvl like 5-6 psi of boost.

Just give me ur email and i will show you pic and avi of how we mod our s/c in our place.

bsee · 03-30-2005, 02:38 AM

If you are doing a 10psi of boost on stock crank pulley. Assume that u install a HKS crank pulley then you will get about 12-13psi of boost. If you install a blitz then you will get atleast 14-15 psi boost. When it comes to cusco pulley definately you will get more than 15 psi of boost.

What happen if you use my 178mm crank pulley ? Imagine the ammount of boost that you are doing.