Ordered Whipple
May 17, 2011 | 09:41 AM
#52
Thread Starter
On The Tree
Joined: Feb 2011
Posts: 190
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guys, help me out here. I did a few quick runs this morning with my HP Tuners hooked up. It has been a LONG time since I've dealt with engine tuning (it was very basic at that) and I need help figuring my max psi at WOT. At idle, my MAP was reading 28.0-30.0 Kpa which is around 4 psi. Is this my current absolute pressure? We are around 700 ft above sea level here so I'm not really sure what it should be. at 100% throttle, my MAP reads 118.0 Kpa, and it didn't budge until I let off at around 90mph. This is about 17 psi. Whipple states that it should give about 8-10 psi on a stock truck. How do I calculate what my actual max psi is?
May 17, 2011 | 12:30 PM
#54
Staging Lane
Joined: Feb 2011
Posts: 69
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From: Boston, MA
Boober -
If your only running a 1 bar MAP sensor it won't read to much into boost, Which is why you flatlined it at 118. (i believe)
Usually NA engines produce about 98-100kpa at WOT which is obviously no boost.
I'm more upto date with earlier LSX stuff, but I believe this applies to what your seeing.
If your only running a 1 bar MAP sensor it won't read to much into boost, Which is why you flatlined it at 118. (i believe)
Usually NA engines produce about 98-100kpa at WOT which is obviously no boost.
I'm more upto date with earlier LSX stuff, but I believe this applies to what your seeing.
May 17, 2011 | 01:11 PM
#55
Nikon's right, the 1 bar sensor will only read up to 1 bar of pressure (which is right around atmospheric pressure of 100 kPa or 14.7 PSI). So you need a 2 bar sensor to read 1 bar of pressure over atmospheric, and you need a 3 bar to read 2 bar of pressure over atmospheric, etc.
May 17, 2011 | 01:23 PM
#56
Thread Starter
On The Tree
Joined: Feb 2011
Posts: 190
Likes: 0
Boober -
If your only running a 1 bar MAP sensor it won't read to much into boost, Which is why you flatlined it at 118. (i believe)
Usually NA engines produce about 98-100kpa at WOT which is obviously no boost.
I'm more upto date with earlier LSX stuff, but I believe this applies to what your seeing.
If your only running a 1 bar MAP sensor it won't read to much into boost, Which is why you flatlined it at 118. (i believe)
Usually NA engines produce about 98-100kpa at WOT which is obviously no boost.
I'm more upto date with earlier LSX stuff, but I believe this applies to what your seeing.
May 18, 2011 | 12:23 PM
#57
I know that Whipple has not had a great reputation for customer service, but I have to say that their customer service in my case has been fantastic. I have dealt with many aftermarket companies over the years and Whipple definitely ranks at or near the top from my personal experience. With luck, I might be able to report that I'm up and running by this evening.
I would expect to see you around 8 PSI. As mentioned before, adding headers and the catback left me around 6 PSI before changing the pulley.
May 19, 2011 | 07:15 PM
#59
Thread Starter
On The Tree
Joined: Feb 2011
Posts: 190
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Update: Here are some pics that I promised. I didn't get the clearest shot of the H/E but it is a really nice piece IMHO. I've been really enjoying the extra power! I traded in my DD Cobalt SS/SC (fairly modded) for this truck and I at least wanted as much acceleration as the Cobalt. I definitely got that! Since I use my truck for my business, I think I'm just going to keep it in this configuration for now. It feels like a factory installed supercharger. Just nice and smooth with plenty of pull. I have my weekend toy to play with anyway.
