turbo + 438s

[domsclio182]

Would it be ok to turbo charge a Clio with 438 cams fitted.

 

[Silent_Scone]

Absoloutely. Personally wouldn't bother though. Save the money for the bottom end. Unless of course you already have 438s!

 

[domsclio182]

Have the cams fitted, have spoke to ktec about this and they said it would be ok, just wanted to get some more opinions.

 

[Dan519]

be interesting. Not the cam choice I'd go for if speccing a turbo'd build

 

[Silent_Scone]

Way it goes though, can't always plan ahead! You'd want a cam thats more suited to the flow characteristics of b00st. Will still be better than stock cams, wouldn't worry about it

 

[Dan519]

Way it goes though, can't always plan ahead! You'd want a cam thats more suited to the flow characteristics of b00st. Will still be better than stock cams, wouldn't worry about it

works the other way round really, you need cams that encourage the turbo to spool. Generally the wilder the cams, the more suited they'll be to bigger turbos that boost later on for big power. Turbo cams tend to be a lot shorter duration, lower lift, and lots less overlap than N/A . A wild turbo cam is usually getting on for something like a standard or mildly upgraded N/A version

 

[Dan519]

the alternative that's worth considering is that supercharger tuning (or at least centrifugal chargers) can be looked at a lot like N/A. 438s should be pretty fantastic with a Rotrex

 

[scotty2hotty81]

Are we talking forged or low boost?

 

[Don]

the alternative that's worth considering is that supercharger tuning (or at least centrifugal chargers) can be looked at a lot like N/A. 438s should be pretty fantastic with a Rotrex

Don't know if this is of any use...if not already sold???

http://www.cliosport.net/forum/showthread.php?654076-Rotrex-C30-94-Supercharger-kit-for-sale-£2500

 

[domsclio182]

Low boost at the moment.

 

[NorthloopCup]

438 inlet cam and standard exhaust cam would work well too.

 

[Chip-mk1]

438 inlet cam and standard exhaust cam would work well too.

Agreed, hotter inlet only is a good way to go when turboing most N/A engines. Although the 438 is probably a step too far unless going for big power.


Ive been thinking about putting a 197 inlet cam into my phase 1 turbo when I have the head off to re-ring it.

 

[T.Trophy]

Agreed, hotter inlet only is a good way to go when turboing most N/A engines. Although the 438 is probably a step too far unless going for big power.


Ive been thinking about putting a 197 inlet cam into my phase 1 turbo when I have the head off to re-ring it.

Think the 197 inlet will be a bit wild as well mate, when I had one measured it came out at 231 degrees @1mm and 11.3mm lift

 

[Chip-mk1]

Think the 197 inlet will be a bit wild as well mate, when I had one measured it came out at 231 degrees @1mm and 11.3mm lift

I like revs, mine pulls ok to 7500 but I'd like it to pull to 7800 a lot harder ideally.

 

[Silent_Scone]

lol do you really need to be all the way up there on that thing? f**k dat.

 

[Chip-mk1]

lol do you really need to be all the way up there on that thing? f**k dat.

Generally I change at about 6800rpm or so when accelerating hard in a straight line as it does love to rev (peak power is at just under 6500rpm currently), but its handy to have the extra RPM on tap if you are coming out of a bend as it accelerates so quickly in the lower gears that otherwise you are having to change gear when you are barely past the apex even if you go in at 4Krpm in the first place.

Situation I have currently is that if I wind the boost up I can have more torque than I would want at 5Krpm already, but I cant increase the power at 7500rpm that way as the engine doesnt want to breathe that far up, so if I can get a hotter inlet cam in that shifts that bias upwards it will be well worth doing.

That said, im sure the box isnt going to like seeing those revs often at the same time as quite a bit of torque, which is the big downside to turbo clio ownership IMHO.