Need help....lost HP on the dyno....
#1
Need help....lost HP on the dyno....
I dyno'd my car on 3/28/02. I got 213.7hp and 254.3 tq.
I dyno'd again last night. I got 200.6hp and 225.5 tq.
Now here's the story. The only difference since 3/02 was the install of a warpspeed Y and Don's VB mod. Nothing else. Same plugs, same intake, same everything. I purposely didn't add anything else because I wanted to see the difference the Y alone made. Here's what I've done so far: I replaced the rear O2 sensor about a month or two ago; I replaced the KS at that time too; I changed my plugs to Denso Iridiums around the same time; I checked the codes last night after I got home and got 0505; I did NOT reset the ecu last week when I installed the Y, I reset it last night to see if it would make a difference; I have a FP gauge and noticed excellent pressure during the run; I have noticed a slight increase in temp from my EGT gauge since the Y but not anything crazy (I think); I took out the plugs last night and everyone of them look almost identical, no fouling, no blown tips, no sign of detonation; I did notice that the #4 cylinder extension (the part that replaces "spark wires" in our ignition)boot was torn and the extension separated into two pieces.
Can someone tell me if this will cause me to loose that much HP? My car starts, runs, and idles just fine. I don't feel a miss, I don't feel hesitation. The coil pack is held down by two bolts which leads me to believe that it's still making contact even though it's split like that. The only thing I can summize is that A: it's either arching at the top-end and thereby losing power or B: it's making sufficient contact and not the problem. I'm going to replace it anyway, but I was thinking outloud. I'm extremely frustrated and some of my maxima guys are stumped too.
Can anyone think of anything else I could check? Any suggestions are welcomed at this point. Thank you in advance for helping.
I dyno'd again last night. I got 200.6hp and 225.5 tq.
Now here's the story. The only difference since 3/02 was the install of a warpspeed Y and Don's VB mod. Nothing else. Same plugs, same intake, same everything. I purposely didn't add anything else because I wanted to see the difference the Y alone made. Here's what I've done so far: I replaced the rear O2 sensor about a month or two ago; I replaced the KS at that time too; I changed my plugs to Denso Iridiums around the same time; I checked the codes last night after I got home and got 0505; I did NOT reset the ecu last week when I installed the Y, I reset it last night to see if it would make a difference; I have a FP gauge and noticed excellent pressure during the run; I have noticed a slight increase in temp from my EGT gauge since the Y but not anything crazy (I think); I took out the plugs last night and everyone of them look almost identical, no fouling, no blown tips, no sign of detonation; I did notice that the #4 cylinder extension (the part that replaces "spark wires" in our ignition)boot was torn and the extension separated into two pieces.
Can someone tell me if this will cause me to loose that much HP? My car starts, runs, and idles just fine. I don't feel a miss, I don't feel hesitation. The coil pack is held down by two bolts which leads me to believe that it's still making contact even though it's split like that. The only thing I can summize is that A: it's either arching at the top-end and thereby losing power or B: it's making sufficient contact and not the problem. I'm going to replace it anyway, but I was thinking outloud. I'm extremely frustrated and some of my maxima guys are stumped too.
Can anyone think of anything else I could check? Any suggestions are welcomed at this point. Thank you in advance for helping.
#6
Originally posted by JAIMECBR900
Yea, I know. But do you think I would lose that much HP just from that?
Yea, I know. But do you think I would lose that much HP just from that?
#7
Originally posted by SMX
I agree 13hp is a lot to lose from just the coil pack. Hey Jamie next time you guys go to the dyno be sure and let me know...I'm soooo ready
I agree 13hp is a lot to lose from just the coil pack. Hey Jamie next time you guys go to the dyno be sure and let me know...I'm soooo ready
Thread
Thread Starter
Forum
Replies
Last Post
95maxrider
Nitrous
10
09-13-2005 11:09 PM
michaelnyden
Supercharged/Turbocharged
26
08-03-2004 07:20 AM
Deac
5th Generation Maxima (2000-2003)
52
05-18-2004 02:59 PM