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Old 04-28-2005, 11:08 AM   #1
firebomb
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Subaru Stars Most Benificial Swap??????

ok I usually read and reread every sticky before i post, and i saw nothing about chasis weights or power to weight ratio's or anything of that nature, so heres my question

What is the EASIEST engine swap and what is the best chasis for a candidate. I want a light chasis, and a beefy engine, but without a lot of hassle and well........ rewiring, If you could do any subee swap what would be your first choice. and please explain, i don't care if its long as long as it educates me.
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Old 04-28-2005, 12:35 PM   #2
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easiest prolly is a pre 96 impreza/legacy with a pre 96-97 wrx engine

if i were to do any swap at this point a 95 coupe with a 04 forester XT engine and drive train there is a tone of parts for both platforms and for me (not a drag racer) the 4.44 tranny is yummy
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Old 04-28-2005, 01:36 PM   #3
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Aesthetically, I would rather have the 98 or later coupe, but you're right - pre-96 means no OBD-II which means you can practically use anything you want. I would be torn between using the old closed block vs V7/V8 with AVCS though. I would still use the 5MT tranny so it's easier to have the clutch worked on.

I would have to say the JDM GC engines should be the easiest to swap onto a pre-96 chassis.
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Old 04-28-2005, 01:38 PM   #4
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Mine would be a GC8 coupe with a USDM STi or a V7/8 with the 6 speed. easy, no.

easiest would be to go trade your car in and get a STi
-Eli
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Old 04-28-2005, 06:34 PM   #5
Matt Monson
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It is rare to see people care about power to weight ratios around here. This suggests to me that you may actually be serious about racing your car, or maybe not. The lightest weight Impreza's are the early ones (94-96) with power nothing.

If you look at something like what Subachad has done, you get good power for reasonable $$$'s. Because the early cars are 2500-2600lbs, he chose to go for around 240-250chp. For his track needs, that was adequate. He took an early WRX shortblock and put USDM EJ22 heads on it and incorporated it into his already assembled 1.8t kit. This could also be done with a complete early EJ20G longblock. These longblocks can be had for $650 out of CA.

From there you get a legacy turbo x-member, and a WRX downpipe and exhaust and drop it in. Change the wiring harness a bit to make it work with your factory ECU and then get an E-manage to run it. The whole thing can be done for around $1500.

You could also get a complete JDM swap with ECU for around $2000, but then you are in for the wiring, which you seem to want to avoid...
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Old 04-28-2005, 09:06 PM   #6
firebomb
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yes i do want to aviod wiring with a passion, i am concerned about power to weight ratios my current car is an 89 hyundai excel with the 4g63 swap in it and well when it comes to power to weight ratio's it is king

ok so this is what i have gathered correct any wrong sayings, so a 96 and older coupe chasis with a pre 97-96 wrx engine, Is that a direct swap?

now about the head i read that some of the earlier head didn't flow as well as later ones, now as far as that goes i want a reasonably decent flowing head without the hastle of wring so any suggestions?

and buying a WRX is NOT an option or a good reply...............
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Old 04-28-2005, 09:09 PM   #7
firebomb
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oh and i'm used to well lets just say..... a less than desireable drivetrain (mitsu's) how do they hang with other out there?
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Old 04-28-2005, 10:38 PM   #8
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I agree with most saying, ODBI with less wiring also more range in engine choices for the low low. I personally would rather deal with wiring than swapping heads between engines tho. For me atleast this doesn't sit well.
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Old 04-29-2005, 12:23 PM   #9
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and agian what about trany strength? are the shift rail and snycros able to handle power?
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Old 05-01-2005, 01:47 AM   #10
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so we talk about weight ratio's and not anyone can give any info on tranny strength..... wack
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Old 05-01-2005, 03:41 PM   #11
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Tranny strength seems to be so relative to the driver. But on paper the STi trannies as you work your way up to the latest are the strongest production trannies. But even then it takes some skill to run high power and not break a subaru tranny. As has been said before. Treat your tranny good and your tranny will treat you good.
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Old 05-02-2005, 03:52 AM   #12
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I think to properly answer this question, we need to know your mechanical abilities and what you want to use the car for. A WRX swap seems to be a great option, easy upgrades, reliable and once it's in it's reliable.

As for the tranny, don't get a super strong clutch, that will help. The clutch is cheaper to replace. If you are looking for big 400+ hp, then an STI tranny will be needed for sure.

Me, I'm on a budget I already had everything but a strong block so I got the ej20g block (got it for $75) and bolted it up to my current 2.2 heads. The heads were rebuilt and had some reground cams in it. All up the whole thing cost me under $400 for the head work, reground cams, gaskets, wrx intercooler, rs clutch, etc...

The only thing I would do different now is using the 2.2 block and just using ej22 turbo pistons and rings. In fact I will probably do that in a year or 2 when/if this engine gets tired.

I don't want to have to mess with it in the mean time though, I want to be able to focus on track days, suspension work and 'gasp' enjoying driving the car. To be honest I drive the piss out of that car, but yet I'm gentle... I don't pound the breaks and I don't redline it, yet I drive it in dirt, I pull my motorcycle and trailer with it, I track the car, I canyon run the car, etc...

Chad
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Old 05-02-2005, 11:31 AM   #13
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ok, the easiest swap would have to be a ver7 sti motor into an 02 WRX...just 8 wires to hook up the AVCS
As far as the GC chassis' seem to be, for the pre 96 impreza's stick with the pre 95 jdm motors because of certain system changes that made me doing my 94/02 wrx swap more difficult...also why I-speed won't do another swap of this sort
but for 96+ the swaps are all pretty much about the same...
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Old 05-02-2005, 12:17 PM   #14
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Thats funny that you say WRX is not an option. When the pre 96 WRX RA non STi was the monster to have. Then imagine if you will porting and polishing the heads and so on. Prior to 99 the WRX and the STi were so close in specs it was pathetic. I would take a 95 WRX RA anyday of the week. Oh and for the record the WRX/STi motor tips the scales at an average of 150kg!
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Old 05-02-2005, 03:26 PM   #15
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Quote:
Originally Posted by DuoMaxwell
Thats funny that you say WRX is not an option. When the pre 96 WRX RA non STi was the monster to have. Then imagine if you will porting and polishing the heads and so on. Prior to 99 the WRX and the STi were so close in specs it was pathetic. I would take a 95 WRX RA anyday of the week. Oh and for the record the WRX/STi motor tips the scales at an average of 150kg!
Find me a damn 95 WRX RA Front clip man, I'll I'll give you more BAH or something
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Old 05-04-2005, 01:01 AM   #16
DuoMaxwell
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Hehe I can do it man the only problem is the shipping would kill you!
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