boost controller question

General discussion forum about the 240sx, and a great place to introduce yourself to the board!
mike240sr
Posts: 132
Joined: Fri Oct 01, 2004 5:24 am
Car: 1991 240sx se with sr20det

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Just installed a Greddy type s boost controller. Before my car produced 6psi at full boost know it makes 9psi on low boost setting and 12psi on hi boost. The problem is that when making 9psi the car does not fell like it is making more power. Is this possible.


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masticatingcow
Posts: 2338
Joined: Fri Nov 07, 2003 8:39 am
Car: 94 Mazda FD3S

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Which engine do you have? What size turbo are you running? Injectors? Any fuel management/upgrades? Are you on the stock MAFS?

mike240sr
Posts: 132
Joined: Fri Oct 01, 2004 5:24 am
Car: 1991 240sx se with sr20det

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sr20detstock injectorsstock mafstock turbo

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chugchug
Posts: 14
Joined: Sun Jul 24, 2005 9:08 am
Car: 95 S14

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you shouldn't worry about anything like that or an ecu. just megasquirt the thing and get rid of the junk inside

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masticatingcow
Posts: 2338
Joined: Fri Nov 07, 2003 8:39 am
Car: 94 Mazda FD3S

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Well, let's see. Stock SR injectors are 370cc, right? So I doubt fuel's the problem. The T25 should be good at that level of boost as well. I wonder... Is it possible that you have misconfigured your boost controller? Sorry I'm not that much help.

Bump though.

Teamsprock
Posts: 31
Joined: Tue Oct 05, 2004 10:07 am
Car: 1995 S14.5 GT3076R powered Built SR20det

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The transition from vacuum to boost is what most people feel, and upping the boost on a small turbo you probably won't feel a huge difference, however I would bet the power is there, you need to compare it by times or put it on a dyno. My Gt3076R felt about the same at 8lbs as it did at 10 however it was way faster when I raced someone. Now that its at 18 though its a lot more noticeable. I bet your fine. You could check the spark plugs and make sure your not having any problems. But I bet your fine.

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ETTInnov04
Posts: 378
Joined: Fri Dec 03, 2004 4:38 am
Car: 1989 Nissan 240sx fastback

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2psi really isnt going to feel too much different.

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PantherRacer
Posts: 9408
Joined: Sat Apr 24, 2004 1:32 pm
Car: 1992 Nissan Skyline R32 RB20DET Sedan
Location: The Moorish Throne of Atlantis
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9-6=3 lolbasic math?3psi don't make a BIG difference in feeling though, speed? you should go a bit faster...how does it feel in between 9 and 12 psi?

mike240sr
Posts: 132
Joined: Fri Oct 01, 2004 5:24 am
Car: 1991 240sx se with sr20det

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at 6psi in 2nd and 3rd gear would throw you back at around 4500rpm. now at 9psi the rpm's climb slower and it gets to 9psi at around 3500rpm, and it does not throw you in your seat. Right now i am around with a different "NO" connection on the boost soleniod.


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