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 New Turbo..., Which one.. opinions
 
newby1gsx
post Jul 26 2008, 02:58 PM
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wow... that was nice.... Man if i could hit 12.0 i would be happy!! LOL... ya... that will be nice...

If i take it to a shop to have it done, so they have all the right tools, how long will it take them? or how much labor at the cheaper than normal shop..??
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militaryman108
post Jul 26 2008, 04:37 PM
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QUOTE(newby1gsx @ Jul 26 2008, 02:58 PM)
If i take it to a shop to have it done, so they have all the right tools, how long will it take them? or how much labor at the cheaper than normal shop..??
*



Do a turbo swap yourself. The hardest part is taking off the manifold (because of broken exhaust studs) and if you swap for another mistu turbo you don't have to worry about that,.
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newby1gsx
post Jul 26 2008, 04:38 PM
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No, i mean for the balance shafts... turbo swap is not a big deal.. already done that
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newby1gsx
post Jul 27 2008, 05:17 AM
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Ok.. ...... Just bought an evo 3... mhi model.. Just didn't find any reasons not to..
I will just have to be ok with that..

Still want to get some ideas on what you all think a shop should charge for the balance shaft removal though.. let me know...
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4G63Attack
post Jul 27 2008, 09:13 PM
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did you read my last post
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newby1gsx
post Jul 28 2008, 02:20 AM
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QUOTE(4G63Attack @ Jul 27 2008, 09:13 PM)
did you read my last post
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Yes. re-read my last post... still wondering how long it would take a shop to do it...
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4G63Attack
post Jul 28 2008, 03:40 AM
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you have to talk it to a performance shop or dsm shop. those other shops will not even do it. if you want to try to do it on your car it is going to take a lot of time.
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newby1gsx
post Jul 28 2008, 01:57 PM
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QUOTE(4G63Attack @ Jul 28 2008, 03:40 AM)
you have to talk it to a performance shop or dsm shop. those other shops will not even do it. if you want to try to do it on your car it is going to take a lot of time.
*



Thats just it.. i dont' think i want to after reading what was all involved...
A little over my head considering how proud i was pullin and re-installin my turbo to find out that i blew it from not primen it... lol.. ahhhh ya.......

A new question, (even though i should start a new post) what is the purpose of a fuel pressure regulator? when is it needed and why beyond the fact that it regulates fuel presure... if i understand it right, If i put in a walbro 255 i would need it so that my injectors still see the same amound of pressure and don't put more gas in on each pulse?
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pwee05
post Jul 28 2008, 03:13 PM
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yes, your understanding of the basic function is correct.

it also keeps pressure from dropping too low and, most importantly, raises fuel pressure 1psi for every 1 psi increase of boost. That's why you need to look for an aftermarket one that supplies a 1:1 ratio.

it will also help you compensate for a bigger turbo with stock injectors because you can adjust the base fuel pressure.

injectors are rated at a standard fuel pressure of roughly 43psi. so your stock injectors are rated at 450cc at 43psi. now, if you raise your base fuel pressure to 53psi they become 550-580cc injectors.

you might think, "why would I need new injectors then? why couldn't I just keep raising the fuel pressure." That can be answered with 4 reasons, though, there are more.

1. burst pressure - the fuel pressure at which your injectors physically burst. usually good aftermarket ones are rated to 100psi but can be much less.

2. pulse speed - basically it's how fast the injector can open. more pressure, slower pulse speed.

3. flow - larger injectors flow more under less pressure and create less electrical stress. this puts less stress on the fuel lines, fittings and over all engine operations (ecu, timing, ignition, etc)

4. FPR limits - a fpr can only increase pressure to it's limits. if your base pressure is 53psi and your fpr only supports up to 60 psi all it takes is 7psi of boost to exceed it's limits.

duty cycle is a factor with smaller injectors and dead time is a factor with aftermarket ones but we can get into that later if you want
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newby1gsx
post Jul 28 2008, 04:32 PM
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so if i get a fpr, how much more safely can i get out of my stock set up? do i need a better pump for that? what if i get a walbro 255etc..
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