STi 3 & 4 HEADS... DIFFERENCES ???
#3
Scooby Regular
iTrader: (23)
I think you'll find them to be near enough identical. And i'm 99% sure the flow rates are the same too.
I have heard the base circle on the cams is slightly different though, only a rumour though i think. I have both sets of heads and just haven't had the time to find out. When i do i will create a thread outlining my findings.
What you upto now Joz?
I have heard the base circle on the cams is slightly different though, only a rumour though i think. I have both sets of heads and just haven't had the time to find out. When i do i will create a thread outlining my findings.
What you upto now Joz?
#4
Scooby Regular
iTrader: (23)
Oh and both heads are capable of 500BHP on standard cams obviously if you wanted more you would need uprated cams and preferably uprated springs to prevent spring surge and shimless buckets from the newer heads is a added advantage (saves you worrying about a shim flying out LOL)
#5
Scooby Regular
iTrader: (1)
Not seen any difference between the STi V3 and V4 heads in regards to valvetrain,cam lift and head castings - the Version 3's i have seen tend to come with the early 2 bolt tensioner and the majority of Version 4's have the later single bolt tensioner (nothing to say that the later tensioner has been retro fitted at some time of the engines life though )
Mick
#6
Thanks you two. I thought they were pretty much identical, etc... and were capable of c.500bhp. All one really needs to know LOL
Ta.
Oh and Baley, see here for what I'm about to be doing (from post #6...)
https://www.scoobynet.com/general-te...03-sti-v7.html
Ta.
Oh and Baley, see here for what I'm about to be doing (from post #6...)
https://www.scoobynet.com/general-te...03-sti-v7.html
Last edited by joz8968; 21 July 2009 at 09:30 PM.
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#8
Scooby Regular
iTrader: (23)
Not seen any difference between the STi V3 and V4 heads in regards to valvetrain,cam lift and head castings - the Version 3's i have seen tend to come with the early 2 bolt tensioner and the majority of Version 4's have the later single bolt tensioner (nothing to say that the later tensioner has been retro fitted at some time of the engines life though )
Mick
#9
The Z32 MAF I bought is a genuine one though - it's 2nd hand but unused. It even came in the Nissan 'Genuine Parts' box. The early MAFs are robust and the Z32 is allegedly even better.
I have the "Air-F" parameter always showing on the Commander and always look at it (obviously when safe to do so) etc...
Sorry, I quite often do that don't I? :-D
Last edited by joz8968; 22 July 2009 at 09:56 AM.
#10
Scooby Regular
iTrader: (23)
Yeah, MAFless gives peace of mind but can't be bothered to get pay out again for a Simtek (or even the MAFless version of ESL Live)... let alone Solaris! But the Solaris really is a fit and forget job - as it properly 'looks afer' you lol.
The Z32 MAF I bought is a genuine one though - it's 2nd hand but unused. It even came in the Nissan 'Genuine Parts' box. The early MAFs are robust and the Z32 is allegedly even better.
I have the "Air-F" parameter always showing on the Commander and always look at it (obviously when safe to do so) etc...
Sorry, I quite often do that don't I? :-D
The Z32 MAF I bought is a genuine one though - it's 2nd hand but unused. It even came in the Nissan 'Genuine Parts' box. The early MAFs are robust and the Z32 is allegedly even better.
I have the "Air-F" parameter always showing on the Commander and always look at it (obviously when safe to do so) etc...
Sorry, I quite often do that don't I? :-D
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