low comp
19-11-2003, 07:39 PM
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About 9:1 would be good for turbocharged engine. Just remember give enought fuel and watch those backpressures, backpressure should be lower than boost. If it´s over those boost that is the thing that brakes head gaskets and things like that
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24-11-2003, 06:29 PM
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Why cant u use large boost with higher comp, if many others can? I have 8.5:1 in my rst, runs fine, couple of people i know uses 9:1 in their cosworth´s and 2 bar boost, isn´t that enough boost?
24-11-2003, 06:55 PM
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i have cvh myself i used to use 0,8 bar, but when it comes back to street again i´ll be using about 1,5 bar. Also I´m building zetec for my rst, and will be using about 9:1 cr and about 1,5 bar boost.
Last weekend I was helping my friend with his peugeot 205 mi16 turbo, he has little over 9:1 cr and 1 bar boost, more boost is onto way just waiting new injectors.
backpressure and lean fuel is those what brakes engines, a lot often that too high cr or boost.
Last weekend I was helping my friend with his peugeot 205 mi16 turbo, he has little over 9:1 cr and 1 bar boost, more boost is onto way just waiting new injectors.
backpressure and lean fuel is those what brakes engines, a lot often that too high cr or boost.
24-11-2003, 07:00 PM
#16
Pugs have diffrent fuel injections, i dont know much about them, except they smoke and they are weak!! 
i suggest you take a visit to the cossie romo and see wot compression ratios they are runnin, most run around 7.5:1....at 30psi .....not quite at 9:1 like you said!
if you like high compression thats upto you, but get a spare set of pistons and rings, and keep 'em close by!!!!
GOOD LUCK!!!
i suggest you take a visit to the cossie romo and see wot compression ratios they are runnin, most run around 7.5:1....at 30psi .....not quite at 9:1 like you said!
if you like high compression thats upto you, but get a spare set of pistons and rings, and keep 'em close by!!!!
GOOD LUCK!!!
24-11-2003, 07:14 PM
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off course those things is in order, also is everything else, but why I need spare pistons and rings? That " cossie romo" you said, why is it using such a low cr? let me guess, they are using garret t3 or very small t4? If so then it+s obviouss that they use lower cr because higher cr will brake the engine, and why´s that? Because backpressure from very small turbo will raise temperature too high.
02-12-2003, 05:49 PM
#20
How about water injection??? does it works???
On my 1.6 cvh, I'm planing on making 17 p.s.i., on standart pistons, using a grs evo intercooler and a 5th injector!
I haven't got much information about these things here in Portugal, so I ask you what do you think about it? do you think it will hold on, or will it shread the pistons in no time??
´Cheers everybody!!
On my 1.6 cvh, I'm planing on making 17 p.s.i., on standart pistons, using a grs evo intercooler and a 5th injector!
I haven't got much information about these things here in Portugal, so I ask you what do you think about it? do you think it will hold on, or will it shread the pistons in no time??
´Cheers everybody!!
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