Sti engine into WRX help
#1
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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?
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?
#3
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#4
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
If you're not confident with wiring then get an auto electrician to do it (I did).
I did the same a while ago and haven't looked back
If you're not confident with wiring then get an auto electrician to do it (I did).
#5
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So what your saying is it's just easier to change the heads, as i don't have the loom nor ecu
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#9
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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.
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.
#10
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No, you all seem to be missing the point, i need to fit this engine now to get the car running again, im not bothered that it has STI heads i just want to know the quickest way to get it fitted and running, if i can leave the heads disconected and just run it like that then thats fine, i'l worry about wiring the heads up after
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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
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
#13
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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
If the solanoids don't operate then the cams are static again
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#18
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.
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.
#19
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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.
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.
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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
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
#23
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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
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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.
#25
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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
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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
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
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