Dyno'ed the 4.8L
04-25-2005, 11:43 PM
#1
Dyno'ed the 4.8L
I made a couple runs on a Dynojet here in town just to get an idea of what im making. I'm still using the "125" nitrous and "150 fuel" (57/33) which only gained 80rwhp. I am prolly going to up the nitrous to a true 150 shot which should get me over 400rwhp and 500+ tq. All pulls were in 3rd gear, starting at 3500 RPMs.
On motor I made:
289.5 HP @ ~6700 RPM
275.1 TQ @ ~3700 RPM
At WOT AFR initially starts at 15, then at 4000 RPMS drops to 13, then gradually slopes to 12 and stays.
Avg. AFR is ~12.0
On nitrous I made:
370.4 HP @ ~6500 RPM
457.3 TQ @ ~3800 RPM
At WOT AFR initially starts at 15, then goes to 16 (common nitrous lean spike I guess), and then quickly drops to 12.5 @ 4200 RPMS and from there forward gradually goes down to 11.2.
Avg. AFR is ~11.5 (Pretty rich)
I gained 80 HP and 182 TQ from the spray. Bottle PSI was 1050. I just thought I'd let you guys know what I made from this measly 4.8L.
Here's a short vid:
http://videos.streetfire.net/player....7-ABFEBFEAF857
On motor I made:
289.5 HP @ ~6700 RPM
275.1 TQ @ ~3700 RPM
At WOT AFR initially starts at 15, then at 4000 RPMS drops to 13, then gradually slopes to 12 and stays.
Avg. AFR is ~12.0
On nitrous I made:
370.4 HP @ ~6500 RPM
457.3 TQ @ ~3800 RPM
At WOT AFR initially starts at 15, then goes to 16 (common nitrous lean spike I guess), and then quickly drops to 12.5 @ 4200 RPMS and from there forward gradually goes down to 11.2.
Avg. AFR is ~11.5 (Pretty rich)
I gained 80 HP and 182 TQ from the spray. Bottle PSI was 1050. I just thought I'd let you guys know what I made from this measly 4.8L.
Here's a short vid:
http://videos.streetfire.net/player....7-ABFEBFEAF857
04-26-2005, 12:54 AM
#4
Originally Posted by Deckhand
I made a couple runs on a Dynojet here in town just to get an idea of what im making. I'm still using the "125" nitrous and "150 fuel" (57/33) which only gained 80rwhp. I am prolly going to up the nitrous to a true 150 shot which should get me over 400rwhp and 500+ tq. All pulls were in 3rd gear, starting at 3500 RPMs.
On motor I made:
289.5 HP @ ~6700 RPM
275.1 TQ @ ~3700 RPM
At WOT AFR initially starts at 15, then at 4000 RPMS drops to 13, then gradually slopes to 12 and stays.
Avg. AFR is ~12.0
On nitrous I made:
370.4 HP @ ~6500 RPM
457.3 TQ @ ~3800 RPM
At WOT AFR initially starts at 15, then goes to 16 (common nitrous lean spike I guess), and then quickly drops to 12.5 @ 4200 RPMS and from there forward gradually goes down to 11.2.
Avg. AFR is ~11.5 (Pretty rich)
I gained 80 HP and 182 TQ from the spray. Bottle PSI was 1050. I just thought I'd let you guys know what I made from this measly 4.8L.
Here's a short vid:
http://videos.streetfire.net/player....7-ABFEBFEAF857
On motor I made:
289.5 HP @ ~6700 RPM
275.1 TQ @ ~3700 RPM
At WOT AFR initially starts at 15, then at 4000 RPMS drops to 13, then gradually slopes to 12 and stays.
Avg. AFR is ~12.0
On nitrous I made:
370.4 HP @ ~6500 RPM
457.3 TQ @ ~3800 RPM
At WOT AFR initially starts at 15, then goes to 16 (common nitrous lean spike I guess), and then quickly drops to 12.5 @ 4200 RPMS and from there forward gradually goes down to 11.2.
Avg. AFR is ~11.5 (Pretty rich)
I gained 80 HP and 182 TQ from the spray. Bottle PSI was 1050. I just thought I'd let you guys know what I made from this measly 4.8L.
Here's a short vid:
http://videos.streetfire.net/player....7-ABFEBFEAF857
That hotcam kicks *** !!! Congrats man !!! 
