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3l turbo bottle neck???

BAD SVT said:
besides, only about a year ago, u could probably count on one hand how many boosted cars we had on here. now, there are quite a few of us with FI, thanx to joey(burritasvt). so naturally, knowlege of the way these cars respond to forced air will only get better.
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I was thinking that while driving back to my place today. If it wasn't for him many of us would have moved on because of the lack or power we could get from these cars. Now we have the ability to boost these cars and actually enjoy them against other cars on the roads.
 
Harrry said:
I was thinking that while driving back to my place today. If it wasn't for him many of us would have moved on because of the lack or power we could get from these cars. Now we have the ability to boost these cars and actually enjoy them against other cars on the roads.
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i know for a FACT that I personally would've moved on. U're the man joey!
 
Yeah, I think many more will jump aboard once they feel the NPG setup is reliable. So don't any of you throw a rod! :troutslap:
 
SoopaCooga said:
Yeah, I think many more will jump aboard once they feel the NPG setup is reliable. So don't any of you throw a rod! :troutslap:
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about 7000 miles running strong on my NPG stage I

on stock exhaust

and stock trans

daily driven

why upgrade when things don't break? :D
 
i will drive mine more then just weekends as well, but rain and weather is gonna be a no-no.


and so you guys know, bagged still doesn't have his exaust hooked up..lol
 
BAD SVT said:
thats really impressive. u're probably the only one that drives his/hers daily. i yearn for the weekend when i get to drive mine:laugh:
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Let's see, I've got 13 months and 10000 miles on mine, and I will do whatever it takes to make it reliable enough for daily driving. I was the first Cougar to have the NPG kit installed.
 
The less restriction after the turbo, the faster it will spool. IMNSHO running a turbo on an SVT with anything LESS than 3" is stupid. You JUST spent all that money on upgrading to a turbo and now you're scrimping on the exhaust - it's oxymoronic. Hell, sell your 2.5" exhaust and get the 3". Sometimes you guys need a good smack upside the head. :nonono:
 
Stazi said:
The less restriction after the turbo, the faster it will spool. IMNSHO running a turbo on an SVT with anything LESS than 3" is stupid. You JUST spent all that money on upgrading to a turbo and now you're scrimping on the exhaust - it's oxymoronic. Hell, sell your 2.5" exhaust and get the 3". Sometimes you guys need a good smack upside the head. :nonono:
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calm down stazi:). u really think anyone who spends that kinda money on a turbo kit scimps out on a friggn exhaust? it was negligence on my part, and maybe a little ignorance on mine and others.
 
BAD SVT said:
besides, only about a year ago, u could probably count on one hand how many boosted cars we had on here. now, there are quite a few of us with FI, thanx to joey(burritasvt). so naturally, knowlege of the way these cars respond to forced air will only get better.
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prob. about two hands actually. but i get your point
 
I reallly was alling out BrApple because he said he doesn't want to get a new 3" exhausr because he bought a 2.5" one. At least you (BAD SVT_ admit your mistake. Brian needs to seel his milkstraw exhaust to another CEG'er and buy a 3".

And don't even get me started about Reebs and his stock exhaust he had. :nonono: He's so tight he squeaks when he walks. :troutslap:
 
Stazi said:
I reallly was alling out BrApple because he said he doesn't want to get a new 3" exhausr because he bought a 2.5" one. At least you (BAD SVT_ admit your mistake. Brian needs to seel his milkstraw exhaust to another CEG'er and buy a 3".
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well let me at least find out where I am before doing anything else. it gets dynod this saturday ....

and yes at this time I can't justify/afford to buy a different exhaust. need money to go in another direction as of this time.


honestly that car has more power then I need now. I am more then pleased ... but I will consider an exhaust upgrade in the future.

So I hear what you are saying but again want to see where I am as of this time and look into this more myself so I completely understand what is going on, why, etc ...
 
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Stazi said:
The less restriction after the turbo, the faster it will spool. IMNSHO running a turbo on an SVT with anything LESS than 3" is stupid. You JUST spent all that money on upgrading to a turbo and now you're scrimping on the exhaust - it's oxymoronic. Hell, sell your 2.5" exhaust and get the 3". Sometimes you guys need a good smack upside the head. :nonono:
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Wouldn't spool up be dependent on the size of the turbine housing? In which case an .82 A/R housing would benefit more from a larger diameter exhaust than the .63 A/R we are running, let alone a .48 A/R.
 
SicSE said:
Yes, but I think his point is that for a given turbo, spool time will decrease as outlet pipe size in increased. To a certain degree of course, but you get the point.
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that is what I have gathered also. but mine seems to spool at a good time. off the line it kicks in soon after the secondaries open up. on the highway at speed its almost instant
 
It's all about pumping losses and efficiency. Basically with a restrictive exhaust, it takes more fuel to make the same amount of power as a less restrictive exhaust with LESS fuel.
Therefore you will improve spool up, decrease fuel consumption, decrease exhaust temps after the tubro and thus improve the system life due to reduced thermal stress.
 
would a undersized exhaust also put stress on the headgaskets?? i know for a fact it was/is a issue on supercoupes.
 
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