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Discussion Starter · #1 ·
Can anyone tell me what the standard boost pressure for the evo1 gsr is please?
I am just wondering if it's related to my sudden loss of power . The car has got a
boost gauge below the ash tray which reads 0.75 bar under boost. I don't know if the
gauge is standard (it's got mitsubishi written on it), or if it is even accurate. I am just
wondering if the boost has been played with at all, as I know none of the car's history (bad situation really).

Cheers.
 
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Discussion Starter · #2 ·
My Evo 1, when I got it, boosted to 0.85 bar when I got it. That was with the only mod being a 3 exhaust from the cat back.
 
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Discussion Starter · #3 ·
What exhaust do you currently have. mine came with the standard one. I've had a little nosey about but not many people seem to do them at a realistic cost.
Also, what airfilter do you sue, mine is standard again (and appears to be draing air through a hold only slightly larger than a cats arse).
But I've only had the car 5 months so plenty of time to start fiddling.
Thanks in advance if you have time to answer.
TonyC
 
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Discussion Starter · #4 ·
I bought my car with a Jasma 3 cat back exhaust. It is actually 2.5 for the first couple inches or so. I took out the downpipe and cat and replaced it with a muffler shop made-up 2.5 downpipe with a mandrel bent elbow I got from an Eclipse specialist.

Runing a K and amp;N drop-in filter in the standard airbox. Didn't notice any difference for it except that you can now hear the BOV. If you use a cone type filter you will probably get a benenfit, but I want to keep the car fairly stock looking.

Also put in a Greddy Profec B boost controller (1.05 bar at the moment) and put in a set of HKS 264 cams today.
 
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Discussion Starter · #5 ·
Thanks, I'm just thinking easy mods. I've enough trouble modifying the engine on my race car (not evo) to mess around on the road car as well.
 
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Discussion Starter · #6 ·
Hi,

Firstly, I believe 'Jasma' is a japanese noise regulation standard, as opposed to a brand of exhaust. It is stamped on my HKS rear silencer, for example, and I have seen it on other makes as well.

Modest boost increases are possible, and one in particular can be done FOC. It involves a small and reversible mod to the Boost Control Solenoid. I have done it on my Evo 1, and am happy with the result. I'm no greasy fingered mechanic either, so it must be quite easy. Let me know if you want details, I'll see if I can find them...


Kurt
 
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Discussion Starter · #7 ·
I didn't know that. Jasma was the only thing I could read off of the exhaust so I figured it was the brand. I'll have to go inspect it closer and see if I can find anything else written on it.I don't even have the car right now because the engine has torn the chassis sheet metal by the right side engine mount (when you open the bonnet and face the engine). Has this happened to anyone else?

The boost control solenoid mod was discussed in an earlier thread.
 
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Discussion Starter · #8 ·
on the loss of power problem at the start, perhaps its the wastegate. If it has grown weak and is opening too early you will be loosing boost. (Its a diaphragm -same as the dump valve)
However, I've no idea how to check it accuratly...However I'm speaking to some fellas not too many miles away who might be able to help..
I'll come back to you...
TonyC
 
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Discussion Starter · #9 ·
Bugger !
Just read your other post.
Bizare solution. http://www.ltregister.force9.co.uk/graphics/Happy.gif border|EQU| 0 align|EQU| middle >
Anyway, I'll still post something about checking the wastgate when I find out, for future reference [img]http://www.ltregister.force9.co.uk/graphics/Happy.gif border|EQU| 0 align|EQU| middle >
 
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