Sti engine into WRX help
Hi people,
Ive just bought a JDM 2002 STI engine to fit to my 2002 WRX, now my question is what's the easiest way to do this, can the AVCS heads stay on and just not operate? or can the cams be replaced with the cams from the WRX or is it just easier to swap heads? Ideally i'd like to leave the motor in one piece and just drop it in, i have seen a conversion to get the AVCS heads to work here http://www.importtuner.com/tech/0311...ion/index.html but planned on doing this at a later time if it was possible? Whats your thoughts? |
my limited knowledge says you will need a sti ecu and a sensor will have to run to the gearbox so probaly a wiring loom aswell.
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Originally Posted by bunsofsteeeel
(Post 9498150)
my limited knowledge says you will need a sti ecu and a sensor will have to run to the gearbox so probaly a wiring loom aswell.
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You'll need a STI ECU and the transponder chip (to match) for your key, Then just follow the instructions in the link you posted.
I did the same a while ago and haven't looked back :D If you're not confident with wiring then get an auto electrician to do it (I did). |
Originally Posted by micaredwrx
(Post 9498644)
You'll need a STI ECU and the transponder chip (to match) for your key, Then just follow the instructions in the link you posted.
I did the same a while ago and haven't looked back :D If you're not confident with wiring then get an auto electrician to do it (I did). |
When did i mention changing the heads?
Buy a STI ECU and wire it up (most Subaru breakers will have one). It's really not rocket science! |
advice with an attitude, i like it.
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Originally Posted by micaredwrx
(Post 9499145)
When did i mention changing the heads?
Buy a STI ECU and wire it up (most Subaru breakers will have one). It's really not rocket science! |
you will need the ecu mate, if your after just the power
get your car mapped. the engine will be stronger. i've put an sti v7 block in my uk classic.but have different heads (sti v4) works a charm, but as aboth, you need to source an ecu to make use of your new engine. |
Originally Posted by dabow
(Post 9499673)
you will need the ecu mate, if your after just the power
get your car mapped. the engine will be stronger. i've put an sti v7 block in my uk classic.but have different heads (sti v4) works a charm, but as aboth, you need to source an ecu to make use of your new engine. |
No you cant just put the eng in. your best bet is to swap the heads.
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about to put that my self.
if you use the engine as is, you need all the wiring inc ecu, with the ecu you'll need the transponder. where as if you use the block, and put another set of heads on, you'll be fine. but may/will need a map due to different compresion ratios and set up |
Ok so why? as the cams are obviously pressure driven via solanoids which presumably retards them higher up the rev range, what else is different?
If the solanoids don't operate then the cams are static again |
your wrx ecu will flag a fault code up as there is no tumblers on a sti as mentioned there is on a wrx
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Originally Posted by JDM_Stig
(Post 9500041)
your wrx ecu will flag a fault code up as there is no tumblers on a sti as mentioned there is on a wrx
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yes, I thought you were trying to use the whole lump, will get my coat lol
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Originally Posted by JDM_Stig
(Post 9500075)
yes, I thought you were trying to use the whole lump, will get my coat lol
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Surely it's easier/faster to source a STI manifold/ECU and bolt/wire it in rather than swapping heads over etc
Tbh when I fitted an STI engine in to my WRX I'm sure I read somewhere that you can block up the AVCS oil feeds and run it without, Although the performance will suffer (but as you said your not that bothered). Personally it makes sense to me to do it properly first time round, But I don't know your circumstances. Seems a shame to lose the advantage of the AVCS. |
Originally Posted by micaredwrx
(Post 9500190)
Surely it's easier/faster to source a STI manifold/ECU and bolt/wire it in rather than swapping heads over etc
Tbh when I fitted an STI engine in to my WRX I'm sure I read somewhere that you can block up the AVCS oil feeds and run it without, Although the performance will suffer (but as you said your not that bothered). Personally it makes sense to me to do it properly first time round, But I don't know your circumstances. Seems a shame to lose the advantage of the AVCS. |
2002 jdm sti engine doesnt have an immobiliser. better to put evrything in including the harness
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wire the avcs solenoid (5 wires) into the tumble generator valves (3 wires solenoid and 2 wires position sensors) - or swap the intake manifold over. or get an STi ECU.
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for speed you need to swap the heads.
You could lock the cams in place but the car would need a remap to suit and iti s a pointless route. You either need to fit the whole engine and wire the avcs in but assuming you don't have the sti injectors, turbo you will need it mapping anyway. easier to just fit the wrx heads to that bottom end. I would spend the slight extra and small amount of time to strip the short engine once heads off and replace the bearings though. As the pistons are different it would need mapping but in theory it should be okay on the standard wrx map. Simon |
Originally Posted by Minjeeta
(Post 9500993)
wire the avcs solenoid (5 wires) into the tumble generator valves (3 wires solenoid and 2 wires position sensors) - or swap the intake manifold over. or get an STi ECU.
Simon: why "lock the cams" presumably they are already set in position the solanoids just operate electronically and oil pressure then moves them? or have i got this wrong |
I thought this was all about speed (time). the amount of time youve been on here you could have swapped the heads and had the engine in. you asked the quickest way to get it running and i told you along with others.
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Originally Posted by f4la k
(Post 9501674)
I thought this was all about speed (time). the amount of time youve been on here you could have swapped the heads and had the engine in. you asked the quickest way to get it running and i told you along with others.
Nor have i got a definate answer as no one seems to have tried just running the motor 'as is' or understand how the AVCS works! just comments |
Originally Posted by Petbeemer
(Post 9501765)
Nor have i got a definate answer as no one seems to have tried just running the motor 'as is'
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Originally Posted by micaredwrx
(Post 9501923)
If no one has tried it, Then doesn't that tell you something!
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Originally Posted by Petbeemer
(Post 9501643)
Have you been down this route? its basically what the link i posted shows which is what i was thinking of doing but just not straight off, i just nee to get it mobile and quickly
Simon: why "lock the cams" presumably they are already set in position the solanoids just operate electronically and oil pressure then moves them? or have i got this wrong but if you don;t have the sti manifold, injectors, turbo, ecu, etc it seems a bit of an outlay plus small hassle adding the wiring etc.. Simon |
i'd swap the heads over and sell the sti's heads. Could make some money back:thumb:
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Originally Posted by mike81
(Post 9502116)
i'd swap the heads over and sell the sti's heads. Could make some money back:thumb:
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