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Post by Minijusty on Apr 14, 2004 15:33:19 GMT -5
Well I'm just about to start with turbo mini justy, although it wont look like a justy all the mechanicals will be, so should be good fun, the spec should be; or have alook here as I go www.geocities.com/paul19692002/turbomini.htmCR dropped to 8.5ish:1 ported head removal of cats garrett T2 about 18psi (ish) RS Turbo intercooler ( may go up to cosworth) external oil pump oil cooler lightened flywheel uprated clutch If I can get cheap bearings (lightened and balanced internals Saab 900 throttle body dump the carb, high pressure injectors emerald ems www.emeraldm3d.com/I think thats about any questions or hints and tips most welcome. I'm looking for about 140bhp. Since its a 5 bearing crank, I should be able to rev the nuts of it as long as I can keep the ACT down ! Paul PS If anyone knows where to get cheap main and bottom end bearings from please tell
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Post by DoItSidewayz on Apr 14, 2004 18:39:14 GMT -5
how you going to lower the compression ratio?? Thicker headgasket?
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Post by PaulM on Apr 15, 2004 3:30:13 GMT -5
Ooh no, I'll be grinding the head, I say 8.5ish, as I dont know how much material there is, which could be ground out.
Lower compression = more boost capacity
Thicker haed gaskets with any car but especially turbo's just lead to premature head gasket failure. Forgot to say it is actually a four bearing crank and not five.
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Post by Minijusty on Apr 24, 2004 14:09:51 GMT -5
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Post by Minijusty on Apr 28, 2004 11:26:32 GMT -5
Well, Ive just ground the chambes out from 37.5cc to 39.5cc, which should drop the CR down to 8.65. Orderd my clutch from clutchnet Got my T2, although on the inlet side, its not as simple as I firt thought, due to the inlet manifold also being the water inlet for the head. I may get an injection manfold and have done with it. Also picked up a set of high pressure injectors and receieved my gasket set from Drivewire.
So far so good, just wish I had more time
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Post by DoItSidewayz on Apr 28, 2004 16:12:56 GMT -5
the injected manifold won't bolt up to a carbed head. it's different. the coolant passages are in different spots.
And...you really think it was worth dropping like .4 compression ratio?? With proper management you can run as much boost as you want.
I don't really see the point in doing all that work. just to run 2 more PSI. i'm running 8 psi right now....and it's no problems.
And the clutch....Dude....your problem isn't the disc itself. The problem is the pressure plate.
I'm running stock compression, and 8 psi. it will break away when i pull over 4 psi in 4th or 5th gear. Send your pressure plate to clutchent, and they will modify it for you. The disc itself isn't enough.
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Post by DoItSidewayz on Apr 28, 2004 16:15:01 GMT -5
one more think....with 18 psi of boost you will make more than 140 hp.
I think..i'm making around 115 right now, and it's tuned like a POS.
When i get my Greddy Emanage at the end of this week, i should be making about 125-130 hp. Atleast that's what my calcs say.
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Post by PaulM on Apr 29, 2004 5:16:03 GMT -5
In regard to the head, if they dont match up, I'll have a think at modifying the inlet manifold ( as I was thinking of doing this anyway) or just sticking an injection head on and have done with it. I 'll have a think.
In regard to compression ratio, it's not a great deal of time to grind a head, especialy when you have the irght equipment, and going from 9.1 to 8.65 ( a drop of .45) will make a big difference. Well the difference of reliable to destroyed anyway.
Since I intend to run at more like 18psi , the drop in CR is important to stop det. I'm sure your aware the only way to get more power out of an engine is to cram more fuel and air into the cylinder. Det occurs when the the cylinder temp is too high, so you can either decrease the temp of the charge, wether by ic or by lower boost or reduce the compression ratio. Because Ive gone down to a lower CR. I can increase boost and therefore power to a much higher level, then staying at standard CR. To give a real world experience a mini turbo with a standard 9.4 CR will give about 105 bhp before det. Drop the CR down to 8.8 and you can get 160bhp before det occurs. Obviously more boost is applied but thats the easy part. All I can imagine that can be done with fuel management is to stuff a load more gas in to charge cool, resulting in poorer running, worse emissions and low mpg. Water cooling would be a better option
Speaking to clutchnet, a kushlok will give greater clamping pressure when fitted with a standard pressure plate over stock, This is why they've patented the design ! No doubt I'll need a modified pressure plate a some stage, but that point, I may move to a rotary engine anyway !
I would look at changing the injectors too as N/A ones tend to get pushed out of their seats, when they see too much positive pressure in the manifold. ISTR around 8-10psi...... could be wrong though.
Whats the calc you use for HP ?? Be interested in using it myself.
Paul M
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Post by PaulM on May 4, 2004 7:46:26 GMT -5
According to the turbo calculator I'm looking at 165bhhp, Hope the bottom end can take it ;D ;D
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Post by DoItSidewayz on May 4, 2004 22:17:40 GMT -5
run good oil
And where is your calculator?
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Post by PaulM on May 5, 2004 3:24:08 GMT -5
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Post by philav8r on May 6, 2004 21:36:44 GMT -5
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Post by PaulM on May 7, 2004 3:17:11 GMT -5
Dont know ehat type of turbo is a GL, but I'm cyrrently using a Garrett T2 , which is oil and water cooled
paul M
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Post by DoItSidewayz on May 7, 2004 12:39:35 GMT -5
I'm using the same turbo as that guys car. It is oil and water cooled.
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Post by scubysteve on May 27, 2004 12:27:13 GMT -5
I am going to have an Eclipse Turbo installed on my Justy but need technical information for the mechanic. Can any one help or has any one done this already?
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Post by DoItSidewayz on May 27, 2004 16:21:52 GMT -5
the Eclipse turbo is WAY too big for the justy motor.
The turbo i am using is off just about any 1980's Subaru Turbo Engine. It's an IHI RBH5 It's just about the right size for the justy.
You ever driven a eclipse?? the thing is gutless below like 4,000. And that is with a 2.0 L motor pushing air for it. A tiny 1.2 L motor ain't gonna make enough flow.
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Post by justybad on Jun 26, 2004 9:44:54 GMT -5
Have you decided yet the c.c. of the new injectors and are you going to uprate your fuel pump? If so please let me know as parts here are rare. May have to source in the US.
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