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Old 04-14-2004, 05:21 PM   #1
wildbill99
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Default STi dohc heads on a 2000 rs

first off is it possible to put the new dohc heads off the STi on my 2000rs. second what are the +&- and is the money spent worth any and all gains recieved. let me know
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Old 04-14-2004, 06:07 PM   #2
jeffg
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would need a lot of ECU changes.. and probably the STI intake manifold, which is more changes.

In short a SOHC can be made into a DOHC, but the STI is a bad candidate.

J
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Old 04-14-2004, 06:42 PM   #3
MeshmeZ
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what would be a better candidate?
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Old 04-14-2004, 08:23 PM   #4
nySulli
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any head swap is going to be a huge pain in the ass, i'd suggest just building up your stock heads
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Old 04-14-2004, 09:56 PM   #5
obyone
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Quote:
Originally posted by jeffg
would need a lot of ECU changes.. and probably the STI intake manifold, which is more changes.

In short a SOHC can be made into a DOHC, but the STI is a bad candidate.

J
THe STI heads are meant for Turbo so they are low compression chambers.
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Old 04-14-2004, 10:43 PM   #6
GTBGUY
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wildbill99 - if you want gains on your SOHC set-up, you might as well do proper headwork, cams etc to get more power.
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Old 04-15-2004, 06:41 PM   #7
Compressed
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Bad idea if you are going NA. If you want to turbo your car, they would be sweet but I would reccomend a ej257 or ej22t block for the STI heads then.
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Old 04-16-2004, 04:02 AM   #8
obyone
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Quote:
Originally posted by Compressed
Bad idea if you are going NA. If you want to turbo your car, they would be sweet but I would reccomend a ej257 or ej22t block for the STI heads then.

Yup...the heads are not the only weak point if you're going to turbo your RS. The block can't take too much boost without cracking a wall or something. So you'd end up having to swap out the heads and block...Esentially, almost an entire engine swap, but with twice the hassle.
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