mje_wrx

iTrader: (6)

my heads came out of a wrx import, but look the same as the pic above of the sti v4, with the 2 lines running down then cam through l4ex r4ex, l4in and r4 in, also have the IH and EH on the valves, assuming they have been upgraded in japan, as the car did av many modified parts , can post pics if ppl want

adzer

iTrader: (13)

some one must have sti v4 and v3 cams to hand that they can measure the lobes for me

mje_wrx

iTrader: (6)

when mine are off lobe i can get a feel gauge in easy. il measure mine 2morro in work

adzer

iTrader: (13)

thanks for the offer but what i need is someone with the cams out of the head and to meassure the actual lobes to see if they match the measurements i posted a few posts back.

STI_Baly

iTrader: (23)

Would have measured the v4 cams for you mate, but won't be going into workshop till next weekend sorry fella. If by then nobody has posted i shall confirm figures. Or alternatively PM Merlin24 aka Mick with your request he knows all.....

Good Luck

STI_Baly

iTrader: (23)

Looking at the exhaust lobe alone ties in with Jolly Greens picture of him measuring the exhaust lobe at 42.69..on his version 3 sti heads.

link>>> exhaust_STi3.JPG :: Cams :: Fotopic.Net

Now only if the v4 head guru Merlin24 can confirm the rest. Adzer honestly just PM him he will answer this que and put your mind at rest for good.

Jolly Green Monster

iTrader: (4)

exhaust match my sti3.. I need to find the measurements or remeasure the inlet but the inlet matched 98UK.. when I measured and compared.

Simon

mje_wrx

iTrader: (6)

thats what i meant, i av my cams out, il measure in work today at about 9am and post in my break. il measure exhaust and in let.

not sure if mine are sti v4, but as far as all the info ppl have said on here they are, they have all the correct markings so far,

mje_wrx

iTrader: (6)

ok, my measurments

inet - 44.5
ex - 42.5

adzer

iTrader: (13)

ok cool think i'll send them back

silent running

I think there must be a few pics on my Project thread; I built up some STi3/4 heads myself and had a couple of STi setups through my hands as well as UK v4. The STi's both had two line cams, the UK ones, only one line. The STi's both had the line(s)through the casting of the letter/number. IH/EH valves are STi3/4 and LH-B/RH-B head castings which are universal v4.

There seems to be from my measurements, about 0.1mm difference in lift between the in and ex lobes on the STi3/4 cams - around 42.5mm inlet cam height and 42.6 and a bit on the exhausts. This was pretty consistent over the 8 STI3/4 cams I've measured up. They result in a valve lift of 8.5mm in, 8.6mm ex. The WRX/UK v4 cams I looked at had lifts of just under 8.4mm in and just over 8.4mm on the ex.

Largest STi3/4 lobe I measured was a 42.67mm which gave 8.68mm lift.

Hope this helps.

STI_Baly

iTrader: (23)

That explains it then.

So just to confirm these are STI Cams but UK STI.....hence why these have the single line through the cam markings.



Adzer i hope Silent Runnings answer puts your mind at rest...

adzer

iTrader: (13)

they cant be sti.....if i have calculated it right the lift on the cams are

inlet 8.20
exhaust 8.50

silent running is saying that wrx cams have bigger lifts????

nothing ever goes right for me

silent running

Well, not quite...there WAS no UK STi as a classic, unless someone knows very different. All classic STi's were imports. Stuff like the P1 and 22B which had STi parts were the only exceptions. What I'm getting at is that if these are v3/4 heads, they look at first glance like STi3/4 heads but without the cams. You'd need to get the springs out to look at them, but let's assume that because the tappets and underbucket shims are right, as well as the valves, the springs will be too.

If your lift measurements come up in the right range then you're OK. I've never seen '1 line' STi3/4 cams before though.

STI_Baly

iTrader: (23)

Ok i obviously mis-understood. I have PM'd Mick to pop on the thread and give some advice.

But he may be on holiday, as he would have replied by now.

But Silent i have also never seen STI cams without the 2 cast lines, hence why i was hoping Mick would come here and answer.

adzer

iTrader: (13)

ok so lets say everything is to sti spec apart from the cams, what cams would fit the heads and would there be a huge difference in power etc?

silent running

WRX or UK turbo cams would fit. You wouldn't get the extra lift, and at a guess, not the duration either, but I'm willing to stand corrected on that. You'd be running harder valve springs than normal as well so you could rev it, but wouldn't see more power up the top of the revs like you would with the STi. At a guess!

merlin24

iTrader: (1)

From the picture - they are Version 2 heads ( tell by the spark plug holes) but without knowing the valve codes,spring ID and type of Lifters - could be STi or WRX

Mick

adzer

iTrader: (13)

that pic isnt my cam, that was someone else posting a pic of an unknown cam

STI_Baly

iTrader: (23)

At least now i Know what R3IN........the 3 stands for.....i.e. version 2 cam. When i strip my V2 STI heads i will do a full spec on the heads inc pics (don't know if theyr're hydraulic or solid lifters though) wait and see..could be a while though, or sooner if the gasket goes....hehe

adzer

iTrader: (13)

well a bit of a update took springs out and measured them, they are 56mm which is sti springs.

sooooooooooooooooo..............

heads are v3/4 with sti valves, sti valve springs, sti under bucket shims but the cams remain a mystery.

will take more pics of the cams and post them up.

they was listed on ebay as impreza sti type r heads?

do type r have diff cams from sti?

samcowrx

good news mate, hopefully you will get the answer you want in the end!!

500

Version 1-2 WRX - STI V2 RA - Unknown, presumed Uk2000, circa 1997.

adzer

iTrader: (13)

inlet cam: lobe height 42.3mm + lobe base 34.0mm

exhaust cam: lobe height 42.7mm + lobe base 34.0mm

would that make.......

inlet cam 8.3mm lift

exhaust cam 8.7mm lift

?????????????????????????????????????????????????? ?

anyone got type r cams to hand?

adzer

iTrader: (13)

500 do you have measurements of the cams?

on that pic sti cams look like the lobe is wider?

does anyone know how wide the lobes of sti v3/4 cams?

my cam lobes are 12mm wide

500

Early WRX cam.. in 7.8mm 8.2mm ex lift
STI v2 RA cam.. in 8.0mm 8.2mm ex lift
last cam, Both inlet and exhaust have 8.5mm lift

500

Lobe width is just the pic



pics are clicky

adzer

iTrader: (13)

HMMMMM there seems to be soooooooooo many different cams?????

£5 reward to the first person to find out what cams i have fitted, paid via paypal

tath

YOU CAN'T RUN HYDRAULIC PROFILE CAMS WITH SOLID LIFTERS

They will last about 1000 miles and rattle their bollocks off.

silent running

So maybe I've missed something really obvious - since when are standard non-STi v4 cams 'hydraulic profile'? when v4 heads all used shims AFAIK. The difference is non-STi used overbucket and STi used underbucket. And seeing as we already concluded that they were STi4 heads bar the actual cams, I still say that yes, you could try running non-STi v4 cams in there. They would physically fit.