Testing completed....

HPP3 results:

The first three passes of the day were to get some solid baseline numbers.

Peak RWHP N/A: 278.2
Peak RWTQ N/A: 318.0

The next three passes were after HPP powertuning was installed. The power tuning for 93 octane was used along with 160* stat.

Peak RWHP N/A: 291.2
Peak RWTQ N/A: 325.4

Final analysis:

13 RWHP
7.4 RWTQ

The power was made evenly across the entire tested curve and even opens up some above 4700 rpm.

HPP3 = worthwhile mod

Richard

 

I have a HPP3 on my 2002 Sierra 5.3. I was wondering if the truck tends to wnat to choke itself b/c it thinks it is too cold. When I put a computer mod on my 86 vette and a 160 thermostat it kept fouling plugs. Will this happen to the sierra?

 

Jimmy, a 160F T-stat will typically make our motors run at around 185F, which is not considered "cold". No problems at all, and you should get less knock retard in most cases.

Tony

 

Thanks for the great info! Where was peak HP and TQ for both graphs?

 

Trevor D

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">The next three passes were after HPP powertuning was installed. The power tuning for 93 octane was used along with 160* stat.

Peak RWHP N/A: 291.2
Peak RWTQ N/A: 325.4 </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">----
EDIT
----
I didn't understand what you were asking for the first time I responded...

291.2 RWHP @ 5200 rpm (from 4700-5400 it makes 290+)
325.4 RWTQ @ 4000 rpm (from 3000-4500 it makes 300+)

I was really suprised how much the programming flattened-out the curves.

Richard

<small>[ March 14, 2002, 11:56 AM: Message edited by: oxidizr ]</small>

 

HPP3 tuning tends to improve the F-body low/midrange output also. Doesn't do much for higher rpm though.

Tony