h777

a few months ago i dynoed my truck with the 100hp jets in.... at 4400rpm the graph drops from 396hp to 341hp real quick and my a/f goes from 12.2 to 9.75....my motor should be making power to 5300rpm .....could detonation be the problem ???? will detonation make the motor drop that much power and make the a/f pig rich .....bottle pressure was 1050 and i only had 92 gas in the tank........i have not been back to the dyno since but would like to redyno soon with the 125hp shot and 104 gas......what do you think???

heres the dyno sheet

http://mailcenter2.comcast.net/wmc/v...horsepower.jpg


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sfj

were you running lean before the drop in power and then running rich or what but yeah detonation could definately cause loss in power

h777

a/f was 12.2 before the drop then it went to 9.75 a/f.....pig rich

Black Blown 02

I've never seen detonation change the a/f ratio on my wideband. Sounds like the power drop is due to being too rich. You need to figure out what caused the richness.

h777

anybody have an idea on why my dyno jumped down in power???

Flyer

iTrader: (1)

Link doesn't work. It wants a sign in.

h777

try this link for the dyno chart

http://mailcenter2.comcast.net/wmc/v...horsepower.jpg

Black Blown 02

Still can't see it.

Flyer

iTrader: (1)

Same thing ...

h777

sorry guys i dont know why it's not working........but can any of you guys tell me what could make the hp drop at 4400rpm and went from 12.2 to 9.75 a/f....could this be from knock retard?????

hp at 4400rpm was 396 then dropped to 341hp real quick then gradually went up to 367hp at 5400rpm