Does anyone know what the UPD intake is worth AFA RWHP on a stock 5.3L Yukon motor?

And are ASP pulleys good for this motor too?

Thanks

 

My UPD was worth 6 rwhp and 9 rwtq over the K&N FIPK. Yes pulleys are good on this motor. Quit a few of us have them. Most guys have just the crank pulley. Some have both and some of us (like me) have both, but with the smaller alt pulley because of the extra electrical accessories.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Fast4.8:
<strong>My UPD was worth 6 rwhp and 9 rwtq over the K&N FIPK. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Was that back to back runs or on different days? Was it under the same conditions? Was the truck the same temp when you started each run? I can make 3 back to back runs (no changes) and each one is better.

 

Conditions were very simmilar but on different days. As a matter of fact, It was hotter (3 to 5*) and more humidity on the UPD dyno. They were about 2 months apart and the only change was the UPD. The truck sat for 2 hours on the K&N and 3 for the UPD before runs. The first UPD run was 5rw/7tq. I don't have the sheets with me (I'm at work) so I can't give you the rpm ranges.

Greg

ps: 1 oil change between dynos, but it was done a week or two after the K&N run and changed again after the UPD run. Other peoples results may vary, but that was mine.

 

OK...So what did you pick up total over the stock setup? (rwhp & rwtq)

Jim

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Fast4.8:
<strong>My UPD was worth 6 rwhp and 9 rwtq over the K&N FIPK. Yes pulleys are good on this motor. Quit a few of us have them. Most guys have just the crank pulley. Some have both and some of us (like me) have both, but with the smaller alt pulley because of the extra electrical accessories.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">

 

I never did a stock dyno. My first dyno with 1in/2out exhaust, Airraid, crank pulley, HPPIII, and plugs and wires was 242/251 (40* air temp). Second (low 80's) with electric fans, headers true dual, Cut outs open, K&N and above were 255/261. Lastest (mid 80's) is whats in my sig with the UPD and I forgot to mention different wheels and tires (heavier).

<small>[ August 15, 2002, 08:08 AM: Message edited by: Fast4.8 ]</small>