Boost functions with HPT with LSJ and LNF?
09-25-2009, 10:01 PM
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Boost functions with HPT with LSJ and LNF?
So i know some LSJ like mine use the feature for boost "Desired MAP" on the hp tuning software and others like the new LNFs use something else.
I called my tuner after we tuned and asked him what my desired MAP was he checked and said "200" and i was like well its supposed to be 256 MAP KPA, he goes to tell me 200 MAP KPA is 16psi, well i hit 190 MAP KPA and its 13.5psi on my interceptor, so no way its 16psi. Is it possible he was telling me the boost for the LNF and forgot there different on hpt?
I called my tuner after we tuned and asked him what my desired MAP was he checked and said "200" and i was like well its supposed to be 256 MAP KPA, he goes to tell me 200 MAP KPA is 16psi, well i hit 190 MAP KPA and its 13.5psi on my interceptor, so no way its 16psi. Is it possible he was telling me the boost for the LNF and forgot there different on hpt?
09-26-2009, 12:59 PM
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If the max is at 256kpa it doesnt mean you will run that much boost, its just the max amount the ecu will let it run before it bleeds off I belive. So if you are hitting 190kpa and its set at 200 max, with the pulley you are running setting it to 256 will more than likely not help you boost anymore. But I would max it out just in case you decide to drop pulley sizes
09-26-2009, 07:39 PM
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Yah it was set at 256 be4 my first tune, then my 2nd tune it somehow changed to 200 and i had a 2.85 pulley on the first tune and now im at a 2.9 pulley so im thinking changing it back to 256 will help with the issue. I hit 16.67psi with my 2.85 on 256 map kpa limit then with my 2.9 i hit 14psi max on 200 map kpa limit.
Oh BTW, i tried the bypass mod and it doesnt effect the boost at all.
Oh BTW, i tried the bypass mod and it doesnt effect the boost at all.
Last edited by lilhomieb07; 09-27-2009 at 04:10 PM.
10-13-2009, 09:22 PM
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6.894757293168361 kpa to 1 PSI
Atmospheric pressure ~14.7
101.35 = 0 PSI (no boost/vacuum) so add 6.9 kpa for each PSI.
16 PSI came up as 212 KPA, 14 PSI is roughly 198. Mine's at 235 (20 psi) so I'll never hit it normally, but if my engine messes up and decides to spike it'll back down.
Atmospheric pressure ~14.7
101.35 = 0 PSI (no boost/vacuum) so add 6.9 kpa for each PSI.
16 PSI came up as 212 KPA, 14 PSI is roughly 198. Mine's at 235 (20 psi) so I'll never hit it normally, but if my engine messes up and decides to spike it'll back down.
Last edited by Dainslaif; 10-13-2009 at 10:10 PM.
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