Capa Kits

[Guest joshm006]

hi all,

just wondering, CAPA kits use a a bleed off valve conected to the map sensor in front of the batery via an adaptor plate and the map sensor plug the goes through boost box which is set in resin so cant look at. it also has a mixture screw on the front that has adjustment of 1-10, depending on the amount of boost you run the mixture setting is different eg: 10 psi 5 o'clock position 9 psi 6 o'clock etc....there is to wires that come out of it then conects to the map sesor under the inlet throtle body. The way it works is that it alters the boost via the bleed valve then tells the computer that its all ok (within six psi ) I guess but tells it to richen it up or leak it off within the factory limits in the computer.

Can any one tell me if this is a safe method of power upgrade and does it work well I have had the kit installed and dynoed with my other mods including induction and center mufler and it made 228 rwkw on 9 psi!!!

thanks

[Grant]

Shouldn't you have asked that before you got the upgrade done...?

[turbotom]

Read about the CAPA system, saw some pics in magazine article..... looks very "back-yardish" [ But then I guess what I saw was a prototype]

I think they also incorporate a water spray on the intercooler to try and get a few more neddies. (is that correct?)

Glad to hear you at least put it on a dyno to ascertain improvement.

228 (rwkw) is about the same as APS phase 1.

I assume you verified air/fuel ratios were OK under load across the rpm range? and there is NO pinging? Does it run sweet? And what was the damage ($$$?)

cheers

[CnC]

I had the 9psi CAPA kit installed onto my ute. The kit consisted of a water-injection kit, intercooler water spray, boost box, additional fuel pump, rising rate regulator and a few other bits.

I ended up not using the water injection kit because I have had an issue with one of the CAPA water injection kits in the past. Esssentially the end of the crimped plastic delivery hose cracked causing a large amount of water to be injected into the cylinders and it was very lucky that my engine didnt hydraulic lock. After all water isnt all that compressible..

Anyhow the kit made 225kw at the wheels using 11psi of boost, which is really not up to the task. The boost box in the system simply fools the computer into believing that its running stock boost. The boost box cannot modify the ignition timing, and this is the reason that 11psi is required to create the 225kw result, as the ignition timing was too retarded.

The CAPA system also uses the rising rate regulator and a bleed system to alter the fuel delivery of the stock fuel system which is obviously required in order to supply the required extra fuel. This system is also quite crude and does not compare with a properly engineered solution comprising larger injectors and appropriate engine managment control.

Make a wise decision people..

[CnC]

PS.. I had Croydon Racing Developments install and tune the unichip management solution, but kept the rising rate regulator in absence of a fuel injector solution at that point of time. The end result was 265kw @ the wheels at 9psi, definitely favourable to 225kw @ 11psi one would think..

[richdave]

......kept the rising rate regulator in absence of a fuel injector solution at that point of time. The end result was 265kw @ the wheels at 9psi, definitely favourable to 225kw @ 11psi one would think..

YIKES... that is a considerable difference. Cost comparison between the 2 set ups?

[CnC]

I cant really give one considering that my setup consists of parts of the CAPA kit + the Unichip.

[Street Tuner]

Interesting CNC

My car had a CAPA kit, running 11psi, made over 300rwkw (just), and ran a best of 12.9 and a best of 112mph over the quarter

[aps]

Interesting CNC

My car had a CAPA kit, running 11psi, made over 300rwkw (just), and ran a best of 12.9 and a best of 112mph over the quarter

No disrespect intended, though I find this difficult to believe, that is 300Kw at the treads with only 11 PSI.I would love to see the car on my dyno to see what mumbo it makes in shoot 6 mode, I will bet you a slab it wont make 300Kw at II PSI.

PETER

APS

[CnC]

It may be interesting, and im not particularly bagging anyone, as their are different approaches to various issues, I am simply stating the facts as I see them.