Anyone ever got KPA numbers that are way off when scanning with HPT - Tuning Forum

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Anyone ever got KPA numbers that are way off when scanning with HPT
Tuesday, September 30, 2008 7:16 PM
Simply put HPT just recorded a kpa of 142 on my car. That is 20.6psi. I don't see any way my setup could produce that. All my boost gauge ever shows is 5psi. Out side airtemp was in the 60's F.

My setup is GM charger with stock crank pulley and 2.5 sc pulley. I have heard of the sc spiking with but I thought that was only 2-3psi



FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!


Re: Anyone ever got KPA numbers that are way off when scanning with HPT
Tuesday, September 30, 2008 7:24 PM
No. 142 KPA IS 24.36, now you have to subtract your 14.5 from it. so your charger pressure is 9.86 or so...... with your ECM, 100 KPA is atmospheric ambient pressure.

Chris





Edited 1 time(s). Last edited Tuesday, September 30, 2008 7:29 PM

'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Re: Anyone ever got KPA numbers that are way off when scanning with HPT
Tuesday, September 30, 2008 7:37 PM
Taetsch Z-24 wrote:No. 142 KPA IS 24.36, now you have to subtract your 14.5 from it. so your charger pressure is 9.86 or so...... with your ECM, 100 KPA is atmospheric ambient pressure.
Chris


According to hpt 142kpa is 20.60.

Anyway....umm thanks. I feel super stupid right about now. I knew I needed to subtract atmosperic pressure but I completly forgot about that.



FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!

Re: Anyone ever got KPA numbers that are way off when scanning with HPT
Tuesday, September 30, 2008 7:40 PM
so wait... ur m45 actually did near 10psi?



Re: Anyone ever got KPA numbers that are way off when scanning with HPT
Tuesday, September 30, 2008 7:51 PM
z yaaaa wrote:so wait... ur m45 actually did near 10psi?


Try 6.1psi You take the 20.60 and subtract atmosphere which is 14.5 so that leaves you with 6.1



FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!

Re: Anyone ever got KPA numbers that are way off when scanning with HPT
Wednesday, October 01, 2008 9:46 AM
Not here......

Chris


'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Re: Anyone ever got KPA numbers that are way off when scanning with HPT
Wednesday, October 01, 2008 10:31 AM
Taetsch Z-24 wrote:Not here......
Chris


You better try that again Chris. I also used that exact converter last night right before I made this post. Type in 142 in kpa box and then click purple field you will get 20.59535875768971



Edited 1 time(s). Last edited Wednesday, October 01, 2008 10:32 AM


FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!

Re: Anyone ever got KPA numbers that are way off when scanning with HPT
Thursday, October 02, 2008 6:37 AM
ya...WTF was i doing?!


Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Re: Anyone ever got KPA numbers that are way off when scanning with HPT
Thursday, October 02, 2008 8:01 AM
Taetsch Z-24 wrote:ya...WTF was i doing?!


Chris


Drugs are bad mmmmmmmmmkay?





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