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Best place to source Supretech Valves?
- Thread starter Martin.
- Start date
What cams are you going to be running? That will affect if you need different valve springs
I've got the cams already. @Michael Woodford MST will be setting them up to 421 timing.
Same as you I believe.
I didn't think he was stocking them any more as the margins were too minimal... @Fred@BTM
OK cool thanks, not worth changing whilst I'm there then? Any idea on cost if so?
@BIGASH do you have standard springs or is that a silly question lol?
Don't change them on those cam's IMO I've run standards on those cam's for 2 years and it spends all its time between 5-8k rpm and not had any failures. I'm just worried about uprated springs after seeing a failure on a set of Catcams springs. Will think very carefully before I buy valve springs for an engine.
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They used to come with a stainless steel inlets and exhaust valves or stainless steel inlets and inconel exhaust valves but they stopped doing the stainless steel exhaust valves as they where no good for turbo engines so all that you can get now is the stainless inlets and inconel exhaust which is better.
Im sure Fred, ktec and Paul @ RS Tuning are more expensive tbh.
Im sure Fred, ktec and Paul @ RS Tuning are more expensive tbh.
What's iconel?
So there's only one option now anyway, and that's the best?
Cheers.
Will order these as soon as possible
What's iconel?
So there's only one option now anyway, and that's the best?
Cheers.
Will order these as soon as possible
Its a coating i belive that allowes the valve to run at higher temps which boosted engines do.
Yes its better than stainless, i will be getting a set once im ready to have my head ported and my 421s fitted.
You wont have the problems with the exhaust valve dropping.
Inconel is a super alloy that can work reliably at temperatures from cryogenic upto about 1000 degrees C.
Its a great material for exhaust valves, although the supertech ones are two piece which is a slight weakness, but they are joined in a more sensible place for performance than a standard valve (further up the stem)
Its a great material for exhaust valves, although the supertech ones are two piece which is a slight weakness, but they are joined in a more sensible place for performance than a standard valve (further up the stem)
Its a coating i belive that allowes the valve to run at higher temps which boosted engines do.
Yes its better than stainless, i will be getting a set once im ready to have my head ported and my 421s fitted.
You wont have the problems with the exhaust valve dropping.
Cool thanks, guess it's over kill for intake valves then..
I thought Supertech valves were one piece???
Thought that was the main point in them lol
It seems to be a bit of a misunderstanding that keeps getting repeated in the clio world:
Seems to originate from Ktec and 519 just not really knowing much about these valves and wrongly thinking (and hence telling others) that they were one piece for the exhaust valves when they arent.
http://www.cliosport.net/forum/showthread.php?631853-New-Valves
And then I guess others have just repeated after hearing it from those guys.
Thought that was the main point in them lol
The main points are better material specs, and a join in a place which is exposed to less heat.
One piece would be superior, but also a lot more expensive (as in about 3 times as much)
As Chip said.
The 421 is on the limits of the standard springs.
For cams bigger than 421 where you need uprated springs, rather than get Cat or Supertech you could fit the 197/200 valve springs as long as they are within the spec required by the cams.
Are the 197 springs actually different, Ive not seen specs of the two to compare.
Ive got 197 springs in my turbo, but only cause it just happened to work out that those were to hand, I wasnt aware at the time of a difference.
Ph1 head has bigger exhaust ports, but im not convinced that gives any benefit when the inlets are still standard TBH.
197 head is the other way around and has enlarged inlets.
I'd just get a Neil Roper ported head from MWM if I were you TBH mate, thats the ideal option.
Ph1 head can be used but the bit where the oil strainer is and carbon takeoff etc is slightly different, if you are on bodies or an RS2 though, that wont matter as it just effects the standard inlet fitting, can be done still though .
197 head is the other way around and has enlarged inlets.
I'd just get a Neil Roper ported head from MWM if I were you TBH mate, thats the ideal option.
Ph1 head can be used but the bit where the oil strainer is and carbon takeoff etc is slightly different, if you are on bodies or an RS2 though, that wont matter as it just effects the standard inlet fitting, can be done still though .
Surprisingly affordable considering the standard of the work mate.
Costs can go up if it needs guides or seats etc, but if its just a port job its cheaper than a set of cams.
The gains on 421 are likely to be minimal though, ported heads are more important on hotter cams, will still help a bit though.
Costs can go up if it needs guides or seats etc, but if its just a port job its cheaper than a set of cams.
The gains on 421 are likely to be minimal though, ported heads are more important on hotter cams, will still help a bit though.
You reckon... might not be worth doing then for me.
From that link I now know Tony has had some head work done, so I'm assuming James probably has too.
I'll have a word with Mike.
Not sure on the import duty risks though so would rather steer clear to be honest.
Fair enough, I'll prob have a look anyway to see
I sent them an email anyway just to enquire. Will let you know what they say.
the valves I put in Petes racecar engine are proper one piece
You sure this time? Cause you said that about the burpspeed ones too but they werent, flol.
dci clio track toy..
Alsop engineering . Thats were I got my valves had them in stock and im sure got them within 2 days for under £300 . I only got mine a few months ago after valve failure at fcs
the valves I put in Petes racecar engine are proper one piece
Who makes them then Dan?
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