getting ready to build my next motor

[JonOfScio]

I was coming up on various parts, and had to make a couple decisions... here's basically what I had to decide on.

 

7.80:1 CR EJ18, turbo use

11.5:1 CR EJ22, n/a use

Stroker EJ22, 10.5:1, 2.3L Disp... n/a

 

problem with the turbo ej18 motor is, that i'd need the exhaust, turbo, intake work, and some fuel management. even with an old RHB5, it'd be alot of work.

 

The stroker is a cool idea, I may go through with it. 4mm longer throw on the EJ25 crank, use stock EJ22E pistons, and put in the 1mm longer EJ25 rods, makes about 3mm of more compression, and 2mm more of stroke making displacement.

 

But the EJ18 heads on the EJ22 makes about 11.5:1 by my calculations.

So being that I'm going to have most of the parts pretty soon, I'm anxious to start getting ready.

 

Right off, I'll just do the heads on the block swap, get the motor running in the car, and break it in. Then later on when I can, I'll swap in all the little things.

 

EJ22 shortblock

EJ25 manifold, all my EJ22 sensors, ect. to work on my OBD II ECU

EJ18 heads, with EJ25 SOHC cams

EJ25 Injectors, Apex'i Super AFC II

 

Then, when can be afforded...

 

Walbro fuel pump

Better injectors (EJ22T, EJ207, EJ257, whatever I'll need by calculations)

Fuel cut remover

Massive cams, better valve springs, ect.

 

For a total cost of about $30 I got the EJ22 shortblock and the manifold all ready. I'm doing physical labor for the whole EJ18 longblock... and then I'll have to buy the EJ25 cams, and one manifold. The AFC runs $320. bleh. don't want to pay it, but it loooooks soooo coool (which is never a reason to buy anything, lol) and is supposed to work real well.

 

I'm hoping that with good enough head work (p&p, valvetrain), the higher compression, 100 octane fuel, and really overly huge cams I can make somewhere around 250hp. Now, i keep hearing people saying, "oh, you won't make it past xx" but if someone wants to tell me that I can't make it past xx, then I'd at least like to know why someone would think that. so there's a forwarning. Someone told me on my post I put up on nasioc I wouldn't get much past 150hp. I thought that was just hilarious.

 

And yeah, if anybody can show me any reasons why I may not want to use any of the aforementioned parts, or anything, ect. then go right ahead. I know that EJ18 heads are supposed to flow badly, but with porting and polishing, I can make them flow just as well as any other SOHC head could flow. And yeah, i'd like to get my hands on some nice DOHC heads that flow ultra well, ect, but I'm doing this because it's an inexpensive buildup in comparison to turbo motors, ect. I'll spend less than what it would cost for me to buy the alternative that I KNOW someone's going to mention, a EJ207/EJ20G motor swap. It seems like everyone and they're mother's dog wants to do that swap. Why not try n/a once in my life?

[blitz]

I vote for the high-compression stroker idea.

 

As far as your projected horsepower goals go (I'm assuming 250hp at the crank, not wheels), they're doable, but you're probably gonna need about 7500 RPM (maybe even closer to 8k), so the question is: can a stock bottom-end that hasn't been balanced, peened, and magnafluxed, be pushed that far, reliably?

 

The stock intake manifold is gonna be a serious limiting factor, which some folks have gotten around partially, by extrude-honing. Also, the runners could be shortened a bit by cutting out the stock plenum section, and replacing it with a slightly wider custom-made (tig-welded aluminum) plenum .

 

Considering the need for minimum flow restrictions at all junctures, here's some other considerations (aside from the cam and headwork):

 

Bored throttle-body.

Really good CAI duct (Cobb).

Equal-length headers (the Brullens & Cobb's both seem to make good power up top)

No cats.

Straight-through muffler.

 

It always comes back to $$$$$ with a serious, reliable performance buildup.

[MorganM]

It always comes back to $$$$$ with a serious, reliable performance buildup.

Exactly

 

Want to make 250 HP RELIABLY? Better start throwing loot down. 250 HP is not unrealistic at all with an EJ series engine. A lot of potential there; if there wasnt COBB and others wouldnt waste their time with aftermarket parts.