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Tuning C4S

brandondk

New member
Joined
23 Jan 2007
Messages
2
Hello Boys and Girls!
I knew to the forum and glad to be here!
What would be the best way of increasing more power out of my C4S? Without force induction or altering the cylinder heads, I was thinking more of a remap maybe air filter (BMC) change and exhaust change (REMUS), would this help? Would these changes make the engine more efficent?
Thanks!!!

Migration info. Legacy thread was 111325
 
Hello and welcome...

Is it a 993 or 996? The mods you describe will probably release a few bhp but nothing ground breaking.

Induction and exhaust mods will make the car feel / sound quicker though! Just a matter of whether you think its worth it or save up for a turbo ;)


Migration info. Legacy thread was 111328
 
Cool, nice cars them. I'd go for the induction / exhaust upgrade first which will make the car feel a bit quicker and make it sound more like the thing.


Migration info. Legacy thread was 111332
 
Dunc, he posted in the 993 section :wink:

Suggest you get a remap (ninemeister et al) which will get the power up to circa 300 - 305bhp with similar increase in torque). Air filter change does very little on a 993 I'm told. I had a BMC on my previous car - great on that, but I wouldn't go for one on the 993 - but that's just me. If you want more induction sound, get a Motorsound airbox cover or drill your existing one.

Exhausts - again expect a modest 3-5bhp increase. Dansk or Cargraphic boxes are good for the power, but again most go for sound, in which case RSRs are the ones to go for.

HTH.


Migration info. Legacy thread was 111334
 
Forgot to add, if you really are after more horses, consider some racing cats - they'll make a difference. Also sound absolutely pornographic with RSRs! :D

Migration info. Legacy thread was 111335
 
Those seem fairly high hikes in power for the remap - didn't think a 993 could acheive such power without interanl work (cams etc.).

Air filter / exhaust might not release much power but make the car feel / sound twice as fast!


Migration info. Legacy thread was 111336
 
Yep agree, first mods I did to mine were the Motorsound cover and RSRs :lol:

Those power figures are quoted by 9m. A mate had his C4S done by them last year - got 305bhp. It's on my list of things to do, one day!


Migration info. Legacy thread was 111341
 
Surprised - 20bhp for an ecu remap sounds good esp. considering the stock 993RS has 300bhp from the 3.8 lump!

Migration info. Legacy thread was 111343
 
A straight remap by 9M to release 20bhp on the 993? LOL

By his own admission, Colin Belton said the fundamental weakness of the 993 engine is the flow through the physical head design - hence why he developed his new head design with new flow characteristics. And charge customers £10k for the privilege :wink:

I suspect The 993 3.6 block in standard form is very much near the max outputs for a n/a car. If you want more power/go quicker, the cheapest way is to lose weight from the 993 by stripping out the interior. Otherwise, you will find it cheaper to sell the C4S and buy a 993TT (with a loud exhaust).


Migration info. Legacy thread was 111350
 
Steady guys, don't shoot the messenger! I'm only going on what I've been told and read.

Ocean, with the new heads 9m say it produces 358 bhp. You'll be telling me this is bollox next...


Migration info. Legacy thread was 111354
 
From the 9m website:

  • 964 3.6L Stock 250bhp, Stock Exhaust (no cup/cat); Up To 275-285bhp.
    [list:sakEoWrUIh]964 3.6L Stock 250bhp, Cat / Cup fitted; Up to 295bhp.
    [list:sakEoWrUIh]993 3.6L Non Vario Stock 272bhp Stock Exhust; Up to 290-295bhp.
    [list:sakEoWrUIh]993 3.6L Non Vario, Sports Silencers; Up To 300bhp.
    [list:sakEoWrUIh]993 3.6L VarioRam, Stock Exhaust 282bhp; Up to 303bhp.
    [list:sakEoWrUIh]993 3.6L VarioRam, Sports Silencers 282bhp; Up to 310bhp.
(they assume the car has a K&N air filter fitted, otherwise fit one)


Migration info. Legacy thread was 111359
 
Before you go and spend thousands on increasing a few bhp which you may or may not notice, how about improving the handling first, then loose some wt, then improve the brakes if you really need to, and then think about increasing engine output.

To get any significant ooomph, you're really talking a new head or other expensive engine bits. Race cat will loose wt, slight incrase in power if used with sport exhaust + re-map etc, but at the end of the day, you probably won't notice much of a difference on the road other than may be at the lights. On the track you'll probably want to improve the handling first, so back to my first point! :D


Migration info. Legacy thread was 111360
 
I can't dispute their power claims on the 9M heads, but I think ECU remaps on the Varioram 993 has limited uptake in HP. ECU remaps on non-Vario cars is a bit better, but HP upside is still limited without additional intake/exhaust mods.

The bigger gain you may find is the torque lower down through the range: the ecu just advances the timing lower down the rev range. HP increases are normally only found through improving the breathing efficiency: intake (more air in, denser air in) and exhaust (equal length manifolds improve torque, race cats increase breathing exhalation).

This was certainly the experience I had with my previous 993 - HP didn't move one dot, but the torque was a bit stronger after a remap.


Migration info. Legacy thread was 111361
 
Previous poster said:
Quote: Originally posted by brandondk on 23 January 2007

Hello Boys and Girls!I knew to the forum and glad to be here!What would be the best way of increasing more power out of my C4S? Without force induction or altering the cylinder heads, I was thinking more of a remap maybe air filter (BMC) change and exhaust change (REMUS), would this help? Would these changes make the engine more efficent?Thanks!!!
BMC air filters are highly rated (although limited gains can be made due to the 993 set up) but have a look at the Fabspeed, KN as well

and a quality 'complete' exhaust system will make a difference, there is a wide choice, Tubi, Remus, Cargrahics, etc etc

Here are just a few..

http://www.fabspeed.com/993.html


http://www.millteksport.com/products.bymodel.cfm?modelid=48


http://www.stuttgart.co.uk/


993_7.jpg



bmc_airfilter.jpg





Migration info. Legacy thread was 111362
 

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