How much power out of stock fuel pump.
04-10-2004, 12:40 PM
#3
Originally Posted by parish8
~450rwhp, i dynoed 430rwhp and the presure was starting to drop off just a little but i am using alot of power to run my driveline.
fuel pump is cheap insurance, only like $120 or so, i would just do one to be safe.
fuel pump is cheap insurance, only like $120 or so, i would just do one to be safe.
again.I should be using as almost as much to run my driveline I would think. excab vs reg cab = longer driveshaft, more rotating mass. Plus I am turing a little heavier tire 285/75 with 4.10's I am figueing around 25% loss or so.
04-10-2004, 02:48 PM
#5
Originally Posted by tooquick2beslo
What about with a NOS kit with 125 hp? Would a fuel pump be needed for anything more than that?
on a stock 6.0 i couldn't run the 175jets without loosing presure, with a cam and open exhasut i can't run the 150jets without loosing presure.
stock 5.3 should be ok to at least 150jets
04-10-2004, 06:13 PM
#6
TECH Apprentice
Join Date: Aug 2003
Location: Newport News, Va
Posts: 368
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by parish8
on a 5.3, no. with a 6.0, maybe but probably not.
on a stock 6.0 i couldn't run the 175jets without loosing presure, with a cam and open exhasut i can't run the 150jets without loosing presure.
stock 5.3 should be ok to at least 150jets
on a stock 6.0 i couldn't run the 175jets without loosing presure, with a cam and open exhasut i can't run the 150jets without loosing presure.
stock 5.3 should be ok to at least 150jets
Thanks for the info may have to do that soon then.
What about Injector duty cycles. We logged mine on buddys computer with EFI live and it was saying that i had 89% duty cycle. 0 knock however.
you think i will be ok ?
Trending Topics
04-10-2004, 08:01 PM
#8
This dyno was done on stock injectors and fuel pump. This is a heads / cam Silverado SS with a direct port system. The restrictive exhaust and intake caused the hard drop in power on the top end on the nitrous run.
Yes, A/F ratio was on the rise, but the stock system did make alot more than mid 400 rwhp. A/F was about 12:1 early on, then rose to 13:1 by 6000 rpms when he got out of it.
Yes, A/F ratio was on the rise, but the stock system did make alot more than mid 400 rwhp. A/F was about 12:1 early on, then rose to 13:1 by 6000 rpms when he got out of it.
04-10-2004, 09:57 PM
#10
Nope stock pump and injectors. Had heads cam shorty headers and a flowmaster. No intake or other bolt-ons. Guy brought in the truck to that shop with a whipple and the exhaust. He said it wasn't performing like the whipple claims. They sold him on heads, cam and nitrous, then pulled the whipple. Of course it has LS1 Edit tuning. If I remember correctly, it made about 400 TQ with the baseline whipple dyno, but not much over 300 rwhp.