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Registered
00 2.5RS BRP
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687 Posts
look at it this way...They stopped DOHC in 99. The new rex and sti don't have DOHC. It must have been for a reason.
 

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The Thread Stopper
11 WRX, Matte black
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5,783 Posts
Cost. DOHC can yield better results since you can alter both intake and exhaust. SOHC is more simplified and weighs less. Too many other factors go into the new Subaru engines other than heads to consider them superior.
 

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Banned
'04 RS PBP w/ Black Tarmacs
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1,805 Posts
The new rex and sti don't have DOHC. It must have been for a reason.
:eek:mg:

Actually both the WRX and STi have always been DOHC and still are.

Now about switching a SOHC to a DOHC. Do you plan on going turbo? What kind of power are you looking for?

I would almost think a full swap would be easier and if your just looking for a bit more on the top end a good port and polish should help there.
 

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00 2.5RS BRP
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687 Posts
:eek:mg:

Actually both the WRX and STi have always been DOHC and still are.

Now about switching a SOHC to a DOHC. Do you plan on going turbo? What kind of power are you looking for?

I would almost think a full swap would be easier and if your just looking for a bit more on the top end a good port and polish should help there.
my b....I thought I read another post about a sohc wrx and sti
 

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HERO DEEP!!!
Lt. Dan the 2000 OBS
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756 Posts
You'll need the heads, intake mani and engine wiring harness. I have all of that sitting. PM me if you are interested.
 

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rs2.5-sti hybrid
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139 Posts
Discussion Starter · #9 ·
haha thanks guys. i am just getting an engine to replace my blown block. and the one im getting comes with dohc. so i think i am just going to port my heads. anyone know who will rebuild my heads with better cams, and ported? for sohc. this turned out to be an interesting thread. lol
 

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Registered
1998 Forester on Orange 57F
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4,129 Posts
So everyone assumed you meant wrx heads. But now it sounds like you have 98RS heads? Assuming since you are replacing your block with this one. Either way if you just want to get it back on the road then stick with your stock heads.

Call up Delta if you want some work done to the stock heads.
 
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