sti v3 heads or sti v5 heads. what is better?
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sti v3 heads or sti v5 heads. what is better?
Heey guys,
I am bussy building my project but now i was wondering what heads will be better? I dont mind intake manifolds. Can make them work but which heads are better? I know the v3 sti heads are more aggresive but the v5 sti heads are better flown.
Which one will have more benefits? For spoolup etc. Or would that not matter?
What is you advice on this one.
Btw i am going to run this :
Vf37 with RCM headers
Wiseco pistons
pauter rods
2.5L crank
powerflow exhaust
acl bearings
sorry for bad english but i am from holland.
I am bussy building my project but now i was wondering what heads will be better? I dont mind intake manifolds. Can make them work but which heads are better? I know the v3 sti heads are more aggresive but the v5 sti heads are better flown.
Which one will have more benefits? For spoolup etc. Or would that not matter?
What is you advice on this one.
Btw i am going to run this :
Vf37 with RCM headers
Wiseco pistons
pauter rods
2.5L crank
powerflow exhaust
acl bearings
sorry for bad english but i am from holland.
Last edited by dennieboy96; 25 January 2015 at 11:03 PM.
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#8
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but on a serious note I was about to say that v3 / 4 heads are both capable.
the spec you have listed is pretty impressive - what kind of power are you hoping to achieve? Bear in mind anything worth having does not come straight from a factory - it will want fettling
the spec you have listed is pretty impressive - what kind of power are you hoping to achieve? Bear in mind anything worth having does not come straight from a factory - it will want fettling
#11
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Sti Version 3~4 share a common head casting with the WRX of that year range.
The casting numbers are LH-B and RH-B.
You need to check the valve codes, EH + IH (which are the same as the Type R), shim type ( under bucket or over bucket ) spring colour and length and finally the all important lines through the camshaft letters to identify a genuine set of STi heads.
Mick
#14
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I have never seen any evidence that the cams are any less agressive in V4 heads than they are in V3 heads
Everyone always mentions V3 heads as they were around first.
Merlin Mick...you probably seen more of these than most. Have you ever seen a difference in the cams?
#15
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There are three types
V1/V2
V3/V4
V5/V6
The quickest way to ID what is what is to spot the location of where the coil packs are located, as they are in a different position on all three inlet manifolds.
Unless you are doing a bare shell up build and getting fancy with making your own custom looms. As a rule do not mix and match
#16
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Has that ever been proved though?
I have never seen any evidence that the cams are any less agressive in V4 heads than they are in V3 heads
Everyone always mentions V3 heads as they were around first.
Merlin Mick...you probably seen more of these than most. Have you ever seen a difference in the cams?
I have never seen any evidence that the cams are any less agressive in V4 heads than they are in V3 heads
Everyone always mentions V3 heads as they were around first.
Merlin Mick...you probably seen more of these than most. Have you ever seen a difference in the cams?
It's been a few years since I've had to degree the standard STi Version 3 ~ 4 cams in for M.O.P, but as far as I can recall, there is no difference in lift or duration between them.
Same cams are used in the 22B.
Mick
#19
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Has that ever been proved though?
I have never seen any evidence that the cams are any less agressive in V4 heads than they are in V3 heads
Everyone always mentions V3 heads as they were around first.
Merlin Mick...you probably seen more of these than most. Have you ever seen a difference in the cams?
I have never seen any evidence that the cams are any less agressive in V4 heads than they are in V3 heads
Everyone always mentions V3 heads as they were around first.
Merlin Mick...you probably seen more of these than most. Have you ever seen a difference in the cams?
It was you and merlin that identified my heads when I asked so I can only take this information on board
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