hey i can get a good deal on a ver 5 sti longblock can i run this with my stock wrx intake and exhaust manifolds also will wiring be plug and play can i run it off my usdm wrx ecu and usdm utec for tuning thanks if its a simple job ill be JDM lol

Keep saving man V7,8,9 are the way to go.. You are taking a step in the wrong direction..

Since the heads are different i dont see them being plug and play.. But i dont know much about the older motors..

Keep saving man V7,8,9 are the way to go.. You are taking a step in the wrong direction..

Since the heads are different i dont see them being plug and play.. But i dont know much about the older motors..

AVCS is so over hyped. The v5 and v6 engines are still the best engines Subaru ever made, IMHO. They are bulletproof. The v5 will drop right into your car and all you need to change is your intake manifold harness onto the new engine. This is a straight bolt in switch...

ok well now idk what im going to do its such a good deal with ported heads form cobb already

AVCS is over hyped , the only use for it is autox and wussies that complain about lag. I have seen max gains of about 10hp and 10ftlbs, but the area under the curve is improved. If you want to drag or drive aggressive its useless. It sounds like he doesnt have the Ver 5 intake and I am not so sure his usdm intake will fit.

yea thats what i needed to kno if my intake and exhaust manifolds will fit
and if its a plug and play wiring

Exhaust mani will fit no problem, cam sensors and intake I dont know?

ver 5/6 is not plug and play wiring. Get a version 7. Drops right in, and it's PNP. 11 wires for avcs (IAPerformance makes a awesome wiring kit) and a JDM ecu and BOOM, instante stage 4 with a 8k redline.

ver 5 has forged internals and 8k redline too but your saying its not plug and play then i dont think ill get it and save up for ver 7

small port heads..

AVCS is so over hyped. The v5 and v6 engines are still the best engines Subaru ever made, IMHO. They are bulletproof. The v5 will drop right into your car and all you need to change is your intake manifold harness onto the new engine. This is a straight bolt in switch...

I can concede the avcs, and i was wrong a while back about these motors, they are stronger than i had given them credit for.

I would be curious as to why you think they are more 'bulletproof' than the v7 motors which are identical except they are not open deck. IIRC some of the v5 motors had cooling issues correct? I forgot the reason why, do you know what i'm referring to. If not i'll try and look that up again.

I think the fact that the v7 does plug and play into 02/03's is a major benefit. Off the bat it also has larger injectors which are top feed, has more readily available ecu options, and comes with a larger intercooler. (I know he said longblock, but the advantages to a full motor imo are worth the extra time spent saving)

Do you know the cam specs on the v5/6 ''STI'' motors i'm as there are many variations on a 'v5' motor, i was under the impression the v7 were in fact more aggressive, but this is all off hand.

Port size debates seem still controversial but from my understanding the v5/6 head ports are relatively smaller than the v7/8 with some v5/6's possibly having the same head castings.

For me the main advantages of the newer motor are
-less miles (most likely)
-semi closed deck
-plug and play on newer wrx's
-top feed injectors

Doesn't mean the v5/6 motors can't make power obviously, as they have and you certainly can't go 'wrong' buying one really, just in my opinion a v7 is the easier and better solution in the end for a wrx owner.

With that said though, if you are really looking for a cost effective solution i think an ej257 sb swap is the way to go. Its bang for buck is almost unbeatable. It will most likely be stronger than anything you will throw at it, and has very few hassles associated with the swap. It will also likely make more power on your current setup. That's what i'd recommend.

ok i guess im aving for a ver 7 thanks for everyones help but i kno the head are smaller but the motor i was looking at has a cobb stage1 port job

Well,
Maybe I am mistaken, but I was under the impression that the STI v5's were semiclosed deck as well. And the pistons are forged and the valves are sodium filled. Aside from that, my bias is against AVCS. And if the heads have already been ported, the whole small port/large port arguement goes right out the window. Personally, having seen what Xephyr has done on unported heads, I am of the CFM's from the turbo school of thought and dismiss the large port junkies...

As for the remarks about a v7 being plug and play, but a v5 not? Where the hell do you get that from? a v7 is AVSC and requires an AVCS ECU and wiring conversion. I reiterate, you can take a v5 motor, and switch a USDM intake manifold wiring harness over to it and drop it into a Wrx and fire it right up. No wiring. No ECU issues. Complete bolt on. And the USDM intake manifold should bolt right up as well, so you don't even have to pull your harness, since you will use your USDM manifold.. They changed the bolt pattern on the engines in '99 (v5) to the current configuration. If for some bizare reason, it is the older inline bolt pattern, I have an EJ20G manifold with huge ports I would sell you for it. Or, if it is the slanted bolt pattern and you really want an STi manifold, I have a v6 one sitting in my garage that I would sell. Some of the paint is flaking off, but the ports are a full 1/8" larger than the USDM WRX manifold, and will mate to your v5 heads without greating turbulence at the mating point. Or you could just port match your manifold if you want to do this on the cheap...

I have seen dyno runs with and without avcs it definetly opens up some area under the curve.. It iisnt such a big deal where one has to have it, but it definetly helps..

Doesnt the v5 use the older style ign rather then the coil on plug set-up of the newer cars? Also the mileage i would consider a huge factor..

I dont see why any one would want to put one in a WRX, you can get a budget v7 for 2500 bucks.. Use all your manifolds and be done with it.. I also thought the V7 had updated rods, and someore updated engine components..

My opinion stands that it is a waste of time..

ill be taking your advice and waiting on it and just get a vf 22 and frontmount and be done until i get some money for v7

ill be taking your advice and waiting on it and just get a vf 22 and frontmount and be done until i get some money for v7

Why not just wait on the vf22 man? You will get a turbo on the new motor.. For 4k u can get the whole motor turbo, ecu, sti ic, sti injectors etc.. Sell off your motor for 2k and you just paid 2k for a stage 4 equivelant on a much stronger motor..

vf22(500)sti pinks(300) fmic(1k) you are already at almost 2k man..

Hold off man, i know it is hard but it will be worth it and cheaper in the long run..

if i knew then what i know now, i coulda built my car for cheap, and not messed around with turbo upgrades on the stock motor..

Oh and we can do that swap in my garage in a weekend..

Dave-

The V5/V6 are basically the same engine from a mechanical point of view, you are just getting something a little bit older, it's still an EJ207 engine. The ignition system is different on them, but I think the coil on plug ignition can be used.

The V5/V6 are basically the same engine from a mechanical point of view, you are just getting something a little bit older, it's still an EJ207 engine. The ignition system is different on them, but I think the coil on plug ignition can be used.

Correct. The coil on plug can easily be used. You just switch your USDM vavlve covers over to the replacement engine, and it is done.

And it is not the AVCS that provides the HP, it is the cam profile. You can get different cams for the engine and the supposed gain from AVCS goes out the window. Or, as mentioned above, you can push more air through it with a bigger turbo and get more power that way...

But all of this is really a mute point if we are talking about using a VF-22. Hell, if a VF-22 is as big as you are gonna go, just keep your WRX engine until you wear it out...

And it is not the AVCS that provides the HP, it is the cam profile. You can get different cams for the engine and the supposed gain from AVCS goes out the window. Or, as mentioned above, you can push more air through it with a bigger turbo and get more power that way...



Are you saying that if a car with avcs did some dyno pulls gathred the results, then turned off avcs did some more pulls over layed the data, that with the avcs off it would be the same curve ad with avcs on?

Even with a vf22, or 18g the Sti motor is going to open up so much more usable power on the street.

Matt: what motor do you run in your car?

I have done that exact test and it really depends on the displacement of the motor and the size of the turbo you are using. I rigged my AVCS wiring with an external connector that allowed me to unplug the sensors just by unplugging a plug near the ECU. I was running a PE1818 turbo with a EJ257 block at around 17psi.

With the AVCS on the car gained more midrange power, on the dyno it probably made 5-10 ft-lbs more until you hit higher rpm and the turbo started losing efficiency. The car definitely felt different with the AVCS turned off, the throttle response wasn't as good. With a large turbo on a 2L motor the difference is greater.

So to say it has no benefit is naive and uninformed. That being said I traded my AVCS this year for a set of Crower Stg2 cams, which I believe will improve the efficiency of the engine throughout the powerband, but it's an aftermarket upgrade, not a stock system.

no if i was to buy this motor i would be prolly getting a fp green the vf22 for my stock motor

cronic if i can get a ver7 motor where can i find it for 4 grand thats not bad at all if i could get someone to def buy my motor i could do this soon i have like 1500 that 4 grand is without the 6spd to right damn if im not going to be getting a new turbo and **** for awhile then i need to get my utec tuned for stage 2 the stage 2 base map blows have to set it back to stock

cronic if i can get a ver7 motor where can i find it for 4 grand thats not bad at all if i could get someone to def buy my motor i could do this soon i have like 1500 that 4 grand is without the 6spd to right damn if im not going to be getting a new turbo and **** for awhile then i need to get my utec tuned for stage 2 the stage 2 base map blows have to set it back to stock


Brendan, get my number from my brother and call me one day..

If your buget is only $4k dont... If you must go with a v5 or 6. The going rate for a ver 7 is about $4k for a bare long block. No turbo, no i/c, no harness or ecu so... that would leave you with a useless avcs system. Untill you spend around $800 for a ver.7 ecu... then you have to get it tune... unless your sure its the right ecu for your motor.

You may get your hands on a full ver.7 for around $4k... but its more then likely going to be a third hand motor. Wich would be just like paying less for a ver 5 IMO.

Figure how how much you want to spend on this pointless and expencive toy before you start throwing away money.

Ps. Small ports good... base ver. 7 cams bad. Large ports also good... tired used motors bad.

If your buget is only $4k dont... If you must go with a v5 or 6. The going rate for a ver 7 is about $4k for a bare long block. No turbo, no i/c, no harness or ecu so... that would leave you with a useless avcs system. Untill you spend around $800 for a ver.7 ecu... then you have to get it tune... unless your sure its the right ecu for your motor.

You may get your hands on a full ver.7 for around $4k... but its more then likely going to be a third hand motor. Wich would be just like paying less for a ver 5 IMO.

Figure how how much you want to spend on this pointless and expencive toy before you start throwing away money.

Ps. Small ports good... base ver. 7 cams bad. Large ports also good... tired used motors bad.

Not true man, depends where you look.. My motor was 4500 with everything, shipped, and that was a long time ago.. The motor was MINT..

I would have to agree to save up a bit more incase you run in to any problems.. Also this is the time to do a clutch...

Don't settle for less man, do it right the first time, if you can't afford the good **** save until you can..

There was a guy on canada selling on ebay a complete V7 motor with turbo and everything with the 6MT and the front crossmember/Brembo brakes, for $6200 and nobody even bid on it. I think the buy-it-now price was $6500. The one issue though is that it was somewhat high mileage.

I have done that exact test and it really depends on the displacement of the motor and the size of the turbo you are using. I rigged my AVCS wiring with an external connector that allowed me to unplug the sensors just by unplugging a plug near the ECU. I was running a PE1818 turbo with a EJ257 block at around 17psi.

With the AVCS on the car gained more midrange power, on the dyno it probably made 5-10 ft-lbs more until you hit higher rpm and the turbo started losing efficiency. The car definitely felt different with the AVCS turned off, the throttle response wasn't as good. With a large turbo on a 2L motor the difference is greater.

So to say it has no benefit is naive and uninformed. That being said I traded my AVCS this year for a set of Crower Stg2 cams, which I believe will improve the efficiency of the engine throughout the powerband, but it's an aftermarket upgrade, not a stock system.

I don't recall saying that AVCS has no benefits, and thanks for the personal insults, they really add to the discussion! :rolleyes: I said that AVCS is overhyped. AVCS, just like V-tec on a Honda, allows Subaru to produce a street legal car at higher horsepower numbers while still making it emission legal. If it is such the shizzy, then why would you get rid of it? :confused: You would do this because, as I mentioned above, you can get other cams for a non-avcs engine that will produce more power (at the expense of low end and emissions) than the stock AVCS cams. AVCS is not some magic hp trick.

If AVCS is superior, why are the Rigolis currently playing with the SOHC EJ25 heads for their drag cars? Hmm, newer does not always mean better.

Chronic,
I have an 11.5:1 CR NA EJ25 w/a slew of Cobb parts on it. I have also owned and worked on turbo Subbies a fair bit. But what I drive or wrench on really has no relevance to my level of technical expertise or understanding of what is going on here... ;)

I don't recall saying that AVCS has no benefits, and thanks for the personal insults, they really add to the discussion! :rolleyes: I said that AVCS is overhyped. AVCS, just like V-tec on a Honda, allows Subaru to produce a street legal car at higher horsepower numbers while still making it emission legal. If it is such the shizzy, then why would you get rid of it? :confused: You would do this because, as I mentioned above, you can get other cams for a non-avcs engine that will produce more power (at the expense of low end and emissions) than the stock AVCS cams. AVCS is not some magic hp trick.

If AVCS is superior, why are the Rigolis currently playing with the SOHC EJ25 heads for their drag cars? Hmm, newer does not always mean better.

Chronic,
I have an 11.5:1 CR NA EJ25 w/a slew of Cobb parts on it. I have also owned and worked on turbo Subbies a fair bit. But what I drive or wrench on really has no relevance to my level of technical expertise or understanding of what is going on here... ;)


Wow man, you are pretty uptight.. I was just wondering what you had man dont get your panties in a bunch..

Did you ever think smeone may want a street car, and doesnt want to open it up and do cams, head porting, etc?

Learn how to interact with people and get off your high horse..

Wow man, you are pretty uptight.. I was just wondering what you had man dont get your panties in a bunch..

Did you ever think smeone may want a street car, and doesnt want to open it up and do cams, head porting, etc?

Learn how to interact with people and get off your high horse..

Whoa cowboy! I was agressive with DWX, but in no way meant the same agression towards you. That is why my response to you had a ;) attached.
And I am hardly on some high horse, but when someone makes condescending remarks about how naive I am, you bet they will get the bull by the horns.


As for the your comments about a street car? My arguments were specifically tailored to the little side argument about AVCS vs non and whether a v7 is truly a "better" motor than a v5. In fact most of the guys who post these sorts of threads will never pursue their build beyond some basic bolt ons, but the underlying tech is still relevant. And I stand by my opinion (which is just one man's in a forum of many) that a v5 engine would be a great upgrade for a plane jane WRX...

In fact most of the guys who post these sorts of threads will never pursue their build beyond some basic bolt ons, but the underlying tech is still relevant

How very true.

I bought my car used with a stage 4, and I'm thinking about parting it out and puting in a jdm v7 engine in it. Everyone says its the easiest swap you can do, it drops right in and it's all plug and play. How hard/easy is this engine swap, realistically? does it take a month or two, a few days?

I bought my car used with a stage 4, and I'm thinking about parting it out and puting in a jdm v7 engine in it. Everyone says its the easiest swap you can do, it drops right in and it's all plug and play. How hard/easy is this engine swap, realistically? does it take a month or two, a few days?
Depends... Have you done it before? Do you have the tools? Do you have any idea what is needed? IMO, for something like this, if you have to ask then you should not it. Not untill you understand thing a lot better.