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Old 05-08-2007, 03:36 PM   #1
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Default is 18 or 20psi safe??

i just dropped my car off at rpm to have them tune my link and install 550s and i told them to set it up for 18psi... is that safe?? they are the best tuning shop on the east coast so they should be able to make it perfect...
i am running 305s at 15psi right now and its not fast enough.. i hope that 18psi with a good tune and my big 16g back on will make more power...
thx
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Old 05-08-2007, 03:38 PM   #2
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i wouldn't push more than that...

however, I'm questioning how safe it was to run 305s past 170rwhp at 50psi of fuel...was an FMU invovled?
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Old 05-08-2007, 03:53 PM   #3
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yeah.. its not safe... lots of detonation.. just rebuilt the motor... didnt take it to 15psi that much, maybe two or three times... i hope that 18psi is enough... i think that it should be fine with the forged rods, wiesco pistons, cometic head gasket and apr main studs i just put in...
thx
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Old 05-08-2007, 03:54 PM   #4
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vortec fmu
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Old 05-08-2007, 03:57 PM   #5
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oh....then that's nothing.
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Old 05-08-2007, 03:58 PM   #6
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The built bottom end should make it safe. What kind of boost was Andy running with out any engine managment?
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Old 05-08-2007, 03:59 PM   #7
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All the Mitsu 'G' wheels really shine beyond 20psi.
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Old 05-08-2007, 04:06 PM   #8
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with a built bottom end it should be good for 25psi + and past that the motor will start having flow issues and more work has to go in
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Old 05-08-2007, 04:40 PM   #9
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18psi was Afloyd's high power run. Keep in mind if you're having it tuned to from a "coarse" tune, you should get more power for your boost level anyway.
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Old 05-08-2007, 06:09 PM   #10
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for real jason. how many hp are you looking to make 330 or so?
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Old 05-08-2007, 06:33 PM   #11
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that sounds pretty good to me....
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Old 05-08-2007, 06:42 PM   #12
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I run the GReddy at 18psi all day long with no detonation. I have 440cc injectors tuned with the Link.

Granted, I do have a built motor but I have had no issues with my setup so far.
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Old 05-08-2007, 06:48 PM   #13
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Quote:
Originally Posted by xcsx View Post
I run the GReddy at 18psi all day long with no detonation. I have 440cc injectors tuned with the Link.

Granted, I do have a built motor but I have had no issues with my setup so far.
That turbo is good enough for 18psi to redline?
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Old 05-08-2007, 06:48 PM   #14
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how much power are you making???
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Old 05-08-2007, 06:56 PM   #15
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Quote:
Originally Posted by Lex View Post
That turbo is good enough for 18psi to redline?
Yep. I've never had a problem with it. I can bounce it off the rev limiter and the boost gauge holds 18psi for as long as I want it to (but of course I don't)

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how much power are you making???
I wish I knew. I haven't had a chance to dyno yet. It'll be this season, I'd like to know myself.
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Old 05-08-2007, 07:02 PM   #16
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Probably something in the 275rwhp range...about the most you can ask from it.
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Old 05-08-2007, 07:11 PM   #17
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That's what I was thinking. I really wouldn't want more than that in all honesty. The car is pretty undriveable in hard rain, despite my compromising choices for street tires.

It's also a pig on gas and tires. ~12mpg on 93 octane and I had the belts coming through a set of RT615s in ~1300 miles.

I still love it though.
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Old 05-08-2007, 10:08 PM   #18
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you get less than 12mpg with the link ???
is that just under boost or all the time???
thx
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Old 05-08-2007, 10:18 PM   #19
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I assume his driving habits are to blame I was still making 27mpg at 200rwhp, i expect the same at 250.
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Old 05-08-2007, 10:29 PM   #20
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i have a link,run 93 octane and get a whoping 12-15mpg.
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