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Old 07-16-2001, 06:01 PM   #1
Scooby South
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Join Date: Sep 1999
Chapter/Region: MWSOC
Location: 2013 STX National BRZ and a
Vehicle:
99 Ver6 Recreation
JDM Speedwagon 3 LSDs..:)

Smile The Master Engine Plan

Well I am going to take a plunge and build a 2.0 WRX motor...Its going to take a while but I want to make sure I get all the details...
I plan on buying a used WRX/STi 2.0 motor/tranny/ECU and Rear end.
I want to build the snot out the motor....(Reliable 350 to 375 horse) Items will include the following:
Forged Stoker Crank
Jun Pistons and Rods
Ver 4 heads
Ball Bearing Turbo
APS Uppipe/Downpipe
Stand alone engine management
Upgraded Clutch/injectors/ECU/ Fuel Rails
Upgraded Intercooler or STi IC
STi Tranny rebuilt possibly a 6 speed We'll see
KAAS limited slips center/front/rear
Hardened STi Axles
STi Brakes Lines
The only thing I am not sure of is how the motor (Crossmember is going to work...If I can I am going to get a Left Hand Drive Model from Holland or Belguim....That way It should bolt right up...
Is there anything I am missing....Now like I say this is going to be a LONG term project....I know its not going to happen for at least a year..to get it going...I will probably employ Rallispec's help...when I get the motor all built and dyno'd...especially for the wiring...

What do you Guru's think...How many guys have done this...maye not this extent but at least you can give me some insight...
Already searched and didn't find anything particular to my setup that I have in mind.

Thanks
Scooby South
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Old 07-16-2001, 10:23 PM   #2
Scooby South
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JDM Speedwagon 3 LSDs..:)

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No one huh????? hmmmm.....
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Old 07-16-2001, 11:56 PM   #3
BrownKiler
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Why wouldn't you just turbo your EJ25 motor if you are going all out? With suitable internals and heavy reinforcement of the engine block (you say you are doing a complete high end engine build so presumably this is no big deal), you can run 15-20 psi with ease, and you will have a whole ton of displacement and torque (along with excellent HP). Hyperex did that with his WRX:

http://www.impreza-rs.com/forums/sho...threadid=68320
http://www.impreza-rs.com/forums/sho...threadid=68625

400 HP @ 14.5 psi / 380 lbf/ft torque @ 4800 rpm
490 HP @ 22 psi / 429 lbf/ft torque @ 4900 rpm

Check out those torque numbers--insane! Me personally, I want just enough power to run in the 12's, then I'll be happy (at least for awhile ).

--Jason
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Old 07-17-2001, 06:57 AM   #4
Jay_UK
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Howdy Dowdy..

Drop me a mail...

I've gone down the route of both 2.0 and 2.5.

You wont find STI IV heads anywhere.. rarer than something rare!

I've used the Jun pistons, I can sort you out with a stroker crank, rods, etc.

IMHO.. I'd start with a 2.5 engine.

J.
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Old 07-17-2001, 09:08 AM   #5
Cacophony
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SS, I'm working on a similar project, albeit using an STi V RA engine. I'm not going to discuss it here in the open, since I'm not into debating the merits of the 2.0 vs. the 2.5.. But I'm going the same route you are, i.e. taking my sweet time about it to make sure its done right.
PM me if you want to discuss any plans
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Old 07-17-2001, 10:53 AM   #6
wcbjr
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Aren't our cranks already forged?
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Old 07-17-2001, 11:22 AM   #7
MY99 2.5GT
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I think it was ISR who was selling forged EJ25 everything including short blocks. I'm not sure if these are closed deck short blocks though. Cobb told me they have a procedure that could convert any open deck block into a solid closed deck setup.

Holy Crap could you imagine the boost you could run if you had a turbo purpose built engine starting from scratch.

That would be mind boggling!
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Old 07-17-2001, 12:19 PM   #8
harrydog
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Yes the EJ20 cranks are forged but they're looking for stroker cranks to gain displacement.
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Old 07-17-2001, 01:34 PM   #9
ColinL
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I believe all the EJ series cranks are forged.
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Old 07-17-2001, 01:54 PM   #10
8Complex

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Where are you getting JUN components?
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Old 07-17-2001, 01:55 PM   #11
Jay_UK
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I was hoping to run a lot of boost with my project.

It consisted of a 2.5 closed deck block, modified STI IV heads, with uprated springs, titanium retainers, alloy valves. They had been fully ported and flowed and matched to the 100mm bore.

I was going to run copper gaskets which were wire ringed.

Pistons were JE, double locked with crown coating. Rods were PAR solid billet. Crank was a steel billet 81mm stroke item (making just under 2.6 litre capacity).

Oil squirters were going to be fitted to the block for piston cooling.

Special s99 alloy block and heads bolts have been made to prevent any stretch or movement. ARP 2000 bolts for the rods.

The inlet manifold was going to be a tubular custom made item, allowing eight 550 bosch injectors to be used. Exhaust manifold was an equal length tubular design, mating upto a Garett GT40 turbo, rated to 700bhp.

Remember this was a track car/everyday car.. not a drag car.

There was no end of other stuff, custom front mount intercooler, custom radiator, ERL water injection, ERL water spray, dog box, quaife diffs, pectel ECU.

I dont want to go into the debate on 2.0 V 2.5 again... I know what I'd chose.

J.
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Old 07-17-2001, 02:20 PM   #12
Scooby South
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Thanks Jay Your the man....I don't want anything TOOOOOO elaborate...just reliable and Strong....Your project sounds like something I want to do...Sent you an email...explaining some things....

Cocaphony- sent you a PM...Defiinately in the SAME boat...want something different but reliable...

Jun Stuff is being sorced at JUN USA...I have had a Brief conversation with them to see if they could get the parts and they said yes...nothing other than that right now...

I had turbo on my 2.5 and for the most part I liked it...What I didn't like is the constant Fiddling with the boost controller AND my motor didn't like 6lbs..ie: new bottem end now on order...MY STOCK 2.5 now is where its going to stay until I finish building this motor..I will reveal the full details when my car gets out of the shop....I promise...If you can't wait and are dying to know..PM me....

thanks Guys..this is a good start

Scooby South
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Old 07-17-2001, 06:11 PM   #13
stimpy
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I don't think you need to worry about LHD vs RHD crossmembers. If you look in this pic I took of my Legacy turbo crossmember and my RS crossmember, you will notice that the holes for the steering rack are universal. Legacy crossmember is the one in the lower left.

http://www.nothingserious.net/images/mods/xmember_2.jpg

I am pro-EJ25, but I guess that's not in discussion here eh? For the EJ20, chances are that if you were to simply install the engine and tranny as is, it would be more than enough for the time being. You might want to give www.mrtrally.com.au a jingle. They sell fully built EJ20 motors. For the JUN parts, go to www.moderngarage.com and get in contact with Christian. I think he is an exclusive JUN dealer in the US and he's local to me (he has done some really cool stuff with JUN parts and hondas). I can vouch that he knows his stuff. He might even be able to get you a good deal on the stroker kits (god knows they are expensive).

A number of the parts you can install on your car before the motor goes in, or vice versa, so it won't have to all happen at the same time. A majority of them are indepent of the motor you choose as well. Might be more feasable to do an EJ22T block, as they are probably more readily available and then doing a P&P job on the EJ25 SOHC heads. Internals wouldn't matter, since you seem to be replacing everything anyway. Closing the deck of the EJ25 would be the same cost as getting an EJ22T block, so just about whatever you choose will all be the same price. Accessories you get with an EJ20 motor will be irrelevant, again, since you are replacing everything. Sounds to me like you just need to find a block (EJ20, EJ22T, EJ25) and then go from there.

-Jon
mmmm monster EJ25-T

www.nothingserious.net

Last edited by stimpy; 07-17-2001 at 06:13 PM.
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