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#1
03-06-2004, 07:22 PM
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How much can I boost???
Hello, I have a 2nd gen 3s-gte motor in my '91 MR2 and I was wondering how much can I boost up to and still be safe. The motor has a T3/T4 hybrid turbo done by turbonetics, ACT clutch, HKS chromoly flywheel, Greddy Profec-B II Boost Controller, Greddy Boost CUT controller, Blitz DTT turbo timer, and I think that is about it. Everything is stock. Please help me, I really want to know where my range of boost will be at.
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Hiya... Need a FSM? Hit me up I'll send it to ya for FREE! I only have the 91-98 240sx, s13 ca18det, and s14 sr20det FSM Sorry no 89-90 yet.... Mods: Tein Flex with EDFC Hotshot Header R32 GTR Seats Advan SA3 16x7 16x8 Apexi Dual N1 Exhaust Silvia Front End Conversion Digital Climate Control Nismo 2-Way LSD Injen Intake w/ CAI 
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#3
03-07-2004, 12:09 AM
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Re: How much can I boost???
But will it still be safe?
__________________
Hiya... Need a FSM? Hit me up I'll send it to ya for FREE! I only have the 91-98 240sx, s13 ca18det, and s14 sr20det FSM Sorry no 89-90 yet.... Mods: Tein Flex with EDFC Hotshot Header R32 GTR Seats Advan SA3 16x7 16x8 Apexi Dual N1 Exhaust Silvia Front End Conversion Digital Climate Control Nismo 2-Way LSD Injen Intake w/ CAI
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#5
03-07-2004, 08:36 AM
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Re: How much can I boost???
Yeah, that does make sense. How much are factory cars like mine boost stock?
__________________
Hiya... Need a FSM? Hit me up I'll send it to ya for FREE! I only have the 91-98 240sx, s13 ca18det, and s14 sr20det FSM Sorry no 89-90 yet.... Mods: Tein Flex with EDFC Hotshot Header R32 GTR Seats Advan SA3 16x7 16x8 Apexi Dual N1 Exhaust Silvia Front End Conversion Digital Climate Control Nismo 2-Way LSD Injen Intake w/ CAI
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#6
03-07-2004, 02:44 PM
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Re: How much can I boost???
I do believe most stock are arond 9 psi . But since you got big money for all the extras . I have seen someone run their A/C line inline with the intercooler and push 25 psi. Its all about how cold you can keep your turbo. the colder the more PSI but more boost = more fuel and air needed
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#7
03-07-2004, 05:32 PM
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Re: How much can I boost???
Do I need anything else for my car to make it more safe to boost higher?
__________________
Hiya... Need a FSM? Hit me up I'll send it to ya for FREE! I only have the 91-98 240sx, s13 ca18det, and s14 sr20det FSM Sorry no 89-90 yet.... Mods: Tein Flex with EDFC Hotshot Header R32 GTR Seats Advan SA3 16x7 16x8 Apexi Dual N1 Exhaust Silvia Front End Conversion Digital Climate Control Nismo 2-Way LSD Injen Intake w/ CAI
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#9
03-07-2004, 09:14 PM
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Re: How much can I boost???
If I get a bigger intercooler, doesn't that cause more turbo lag?
__________________
Hiya... Need a FSM? Hit me up I'll send it to ya for FREE! I only have the 91-98 240sx, s13 ca18det, and s14 sr20det FSM Sorry no 89-90 yet.... Mods: Tein Flex with EDFC Hotshot Header R32 GTR Seats Advan SA3 16x7 16x8 Apexi Dual N1 Exhaust Silvia Front End Conversion Digital Climate Control Nismo 2-Way LSD Injen Intake w/ CAI
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#10
03-08-2004, 09:52 AM
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Re: How much can I boost???
i would upgrade the fuel pump atleast if you are going to up the fuel. if you get a chance dyno tune your car and see how its running. since you got rid of most of the safety features of your car, boost cut/fuel cut then you wouldnt know when you run too much boost right? i always suggest to do things right rather than getting too boost anxious.
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#11
03-08-2004, 09:54 AM
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As long as your engine is healthy it should be able to handle 15 psi on 93 octane pump gas.
If you add a better intercooler and water injection you could probably go to 18 psi safely on pump gas. I have a T3T4 with Water injection and upgraded intercooler and I run 22 psi of boost when I use race gas. My engine has 195,900 original miles on it. Hope that helps.
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Sponsorship: Amateur Motorsports <-- Get the book! - books are now available for shipment
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#13
03-08-2004, 04:06 PM
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Re: How much can I boost???
How do you know how healthy the engine is? Getting a fuel pump upgrade and bigger cooler will help it more safer? I just want to boost safe so that I can have the engine last as long as possible.
__________________
Hiya... Need a FSM? Hit me up I'll send it to ya for FREE! I only have the 91-98 240sx, s13 ca18det, and s14 sr20det FSM Sorry no 89-90 yet.... Mods: Tein Flex with EDFC Hotshot Header R32 GTR Seats Advan SA3 16x7 16x8 Apexi Dual N1 Exhaust Silvia Front End Conversion Digital Climate Control Nismo 2-Way LSD Injen Intake w/ CAI
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#14
03-08-2004, 04:11 PM
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A compression check and a leak down test will give you an idea of how healthy your engine is.
The safest things you can for your engine is get a better intercooler and water injection. If you want to boost over 18 psi, you should look at getting a controllable fuel system: larger injectors, fuel pump and some sort of fuel controlling device (SAFC or stand alone engine management).
__________________
Sponsorship: Amateur Motorsports <-- Get the book! - books are now available for shipment
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#15
03-08-2004, 04:29 PM
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Re: How much can I boost???
What should the numbers be around on the compression test to know if it is good?
__________________
Hiya... Need a FSM? Hit me up I'll send it to ya for FREE! I only have the 91-98 240sx, s13 ca18det, and s14 sr20det FSM Sorry no 89-90 yet.... Mods: Tein Flex with EDFC Hotshot Header R32 GTR Seats Advan SA3 16x7 16x8 Apexi Dual N1 Exhaust Silvia Front End Conversion Digital Climate Control Nismo 2-Way LSD Injen Intake w/ CAI
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