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They work well IMO. It's one of my favourite setups. But bare in mind they aren't time up normally. Only a handful of people are in the knowledge of how to do them properly.
MicKPM
ClioSport Trader
Clio16v/Zoe Z.E.50
Top secret timing positions
Not really "top secret" as it's not that difficult to work out where the crossover point would be just by looking at some after market cam specs however I believe Mike Woodford has done a fair bit of work developing the advances with standard and 197 units so I can understand why Mike doesn't shout the values out.
Deffo is a change in induction note with them, and as above you need to time in slightly differently to get the best effect, and you will also need a remap as the ECU wont know that its now flowing air differently as it has no air mass meter.
Mike tried on stadard timing figures and lots of others, on standard figures they made almost no difference, on the figures he uses now its about 8bhp or so generally, so comparable to something like 428s, its not as good as 421s though.
Mike tried on stadard timing figures and lots of others, on standard figures they made almost no difference, on the figures he uses now its about 8bhp or so generally, so comparable to something like 428s, its not as good as 421s though.
Well thanks for all your help I have looked up on here and lot of people are still rating 438 cams I might have to bite the bullet and try and find a set at end of the month this is all new to me so all a bit confusing as a ground worker not a macanic lol and also as you lot have been so help full I have heard it's best to keep a filter instead of an induction kit as loss power? And seen a few threads about vr6 clio air filter or panel filter??????. Like I say haven't got a clue? Just wanna gain sum good power for my 1st tuning project so any ideas fell free to feel me in cheers
As chip said they only gain about 8bhp. Iirc from Mike's graph they lost a little torque and the bhp gains were only at the very top end.
If you're going to go to the hassle of doing a cam swap then fit the best you can for the budget. I'd go for 421 over the 438, they're £600 new and very rarely come up second hand. Or you could get piper cams for £320 and they're as good as the 438.
If you're going to go to the hassle of doing a cam swap then fit the best you can for the budget. I'd go for 421 over the 438, they're £600 new and very rarely come up second hand. Or you could get piper cams for £320 and they're as good as the 438.
You're thinking of when they're fitted to the rs2.
When fitted to a stock inlet like Vikki's, here has gained about 5lb-ft across the range. The graphs are almost identical. But higher up the graph, and the power doesn't tail off.
When fitted to a stock inlet like Vikki's, here has gained about 5lb-ft across the range. The graphs are almost identical. But higher up the graph, and the power doesn't tail off.
MicKPM
ClioSport Trader
Clio16v/Zoe Z.E.50
Fitted a set to @The_Russians phase 1 and it made 178hp on standard inlet with a nice torque curve.
If you can get them for a good price I rate them as a cheaper alternative but they can cause confusion at belt change time due to the non-standard setup required.
If you can get them for a good price I rate them as a cheaper alternative but they can cause confusion at belt change time due to the non-standard setup required.
The local renault garage would certainly wonder what was going on with the timing! lol
Inferno 225 cup
Hai.
IMO it's worth it, I paid £65 for the cams and Mick fitted them along with belt change etc.
The difference in the car was fantastic, the sound on idle + the sound @ 5k+ was lovely.
Paul said with Decat and a new lambda it would have pulled around 184.
If doing the belts, its a cheap and cheerful mod.
If having the belts done just to do the cams, its never worth it IMHO
Inferno 225 cup
Exactly, there are better cams out there but as a 'budget' option it's not bad way to go.
421's and the RS2 is only available s/hand.
Chipped and mapped? ??????
It will need to be remapped.
Superchip = generic off the shelf remap
No point doing that if you then get it properly mapped, it would be like recording an episode of blackadder onto a video tape then taping over it with a copy of red dwarf and refer to the tape as having both, the first one will be gone when you right the second one!
No point doing that if you then get it properly mapped, it would be like recording an episode of blackadder onto a video tape then taping over it with a copy of red dwarf and refer to the tape as having both, the first one will be gone when you right the second one!
If you fit cams or an RS2, you really dont have any options other than a custom map, and be bloody careful where you go.
There are companies out there who will Keep Taking Everyones Cash as if they know what they are doing while actually doing a terrible job that wrecks the engine.
Ol’ Tarby
ClioSport Moderator
Clio 220 Trophy
R5GTT, 2L turbo
A while back I remapped a guys 172 with stock ECU after he'd fitted a pair of 197 camshafts at factory 172 timing with original dephaser. The engine had other subtle modifications and the usual filter and exhaust. It made 188hp with moderate torque increase too. It responded well to keeping the VVT active all the way to the redline and the usual fuel and timing optimization. I'd say its a worthwhile upgrade that doesn't cost you too much response at low RPM.
Trophy Turbo :)
Or if your on facebook join clio sport owners club. Hes on there a lot as is dan potter
Hi
Hi
172 cup cambelt + dephaser and some 197 cams fitted... how much am i looking at?
