Supercharged

[Roodi]

I HAVE DONE A SUPERCHARGE CONVERSION ON THE PROTON SATRIA GTi WITH WATER INJECTION,OMEX ECU,CAT BACK EXHAUST,PIPERCROSS VIPER COLD AIR INTAKE AND COLDER PLUGS .IT NOW HAS BEEN SUGGESTED THAT I HAVE THE ENGINE DECOMPRESSIONED COS I HAVE STILL GOT PINKING AS IT IS STILL RUNNING AT 10.5/1 RATIO .THE CHARGER IS RUNNING AT ABOUT 8PSI.HAS ANYONE GOT ANY INFO ON WHATS THE BEST COMP RATIO TO GO DOWN TO

Edited November 28, 2004 by Admin

[Oneofakind]

Did you adjust your fuel pressure upwards to cope with the boost? You might also consider getting upgraded fuel injectors.

 

You could start with 9.5:1 for your compression ratio.

 

Good luck.

Edited November 28, 2004 by Admin

[Roodi]

YES I GOT A WEBER FUEL PRESSURE REGULATOR WHICH GIVES ENOUGH FUEL THROUGH THE STANDARD INJECTORS.

THE COMP RATIOS I CAN HAVE ARE AS FOLLOWS

9.65/1

9.4/1

9.2/1

8.8/1

8.5/1`

8.2/1

WOULD IT BE ALRIGHT TO GO FOR THE 9.2/1 OR WOULD I LOSE POWER

 

CHEERS

[Hitman]

Brudder ... use smaller caps can ??

 

My eyes going reading all caps lah

[Oneofakind]

What is the peak boost from your supercharger?

 

If it is 8psi, 9.2/1 is a good starting point and near the thoerectical optimum boost.

 

A high compression ratio actually limits the amount of boost u can run and may lead to detonation problems.

[Genie47]

AAAARGH! MY EYES MY EYES MY EYES! Please do us all a favor and stop posting in CAPS. It is unforgivable unless you are using an Apple ][ .

[Saaber]

10.5 is simply too high, bro...try 9.4-9.5...

[Genie47]

At 9.4-9.5 I suggest starting at 6psi boost. 8psi is risky.

[Saaber]

but with the right retard, 8psi is still ok, so you get good lows with impressive mid and high... with the higher compression

[Assassin]

Hi Roodi,

 

Welcome to MCF ! Do enjoy your time here and come along for our weekly Friday evening meetups ! More details in the MEETUPS folder.

 

For other automotive and contacts info, do check out the RESOURCES folder and the TIPS & TECHNICAL RESOURCES folder.

 

You might also want to take a look at our FORUM GUIDELINES in MCF. It also states that users do not post in CAPS as that equates to shouting online.

 

Cheers

[Roodi]

Its running about 8psi now. Even though i have got the air intake temp sorted the engine is still threatening to det. I dont know if i will get any more boost or not so i think the only way to go now is the decomp plate at 9.2/1.I have still got some ignition to advance if wanted but cant do yet cos of det probs

 

Is de-cating supposed to make a difference cos i had a de-cat pipe put on and i reckon it slowed it down

[Oneofakind]

Hi,

 

On our stock Saabs, the standard boost is set at 0.45 bar or 6.525 psi. The compression ratio is 9.3/1. So if you are running the full 8 psi of boost at peak, then 9.2/1.1 is not at all conversative, it may indeed be on a knife-edge

 

Our climate in Singapore is also very hot compared to Japan and Europe so the higher compression ratios achievable there at a comparable level of boost should not be replicated here

 

If indeed you are getting the full 8 psi, then perhaps u must consider going down on the compression ratio. Infact to be safe perhaps u should start looking below 9.0/1.