Why is my MPH so low?
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Why is my MPH so low? 11.837@113.26
1.62 60ft
75 shot
98 Camaro
4L60E
3.42 gears
I've been looking at some similar ET's and it seems like a lot of guys are running higher MPH. Just wondering if my MPH might be abnormally low for the ET.
1.62 60ft
75 shot
98 Camaro
4L60E
3.42 gears
I've been looking at some similar ET's and it seems like a lot of guys are running higher MPH. Just wondering if my MPH might be abnormally low for the ET.
My '98 was going 11.70-80s @ 116-117 on a 100 shot, similar mods to yours, it had stock 3.23 gears in it.
That is very low because you're losing power on the big end of the track. The tune is most likely too conservative. How are you providing enrichment? and are you pulling any timing?
Make sure you're bottle wasn't low and that it's mounted in the proper direction/position first. Check your AFR and lean out the enrichment if you are still going slow.
With just a 75hp shot I wouldn't want to see any richer than 12.5:1 AFR.
I also wouldn't pull more than 2* timing if that.
Make sure you're bottle wasn't low and that it's mounted in the proper direction/position first. Check your AFR and lean out the enrichment if you are still going slow.
With just a 75hp shot I wouldn't want to see any richer than 12.5:1 AFR.
I also wouldn't pull more than 2* timing if that.
Thread Starter
11 Second Club
Joined: Mar 2008
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That is very low because you're losing power on the big end of the track. The tune is most likely too conservative. How are you providing enrichment? and are you pulling any timing?
Make sure you're bottle wasn't low and that it's mounted in the proper direction/position first. Check your AFR and lean out the enrichment if you are still going slow.
With just a 75hp shot I wouldn't want to see any richer than 12.5:1 AFR.
I also wouldn't pull more than 2* timing if that.
Make sure you're bottle wasn't low and that it's mounted in the proper direction/position first. Check your AFR and lean out the enrichment if you are still going slow.
With just a 75hp shot I wouldn't want to see any richer than 12.5:1 AFR.
I also wouldn't pull more than 2* timing if that.
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Thread Starter
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Oh, as far as bottle orientation, and I've been weary about this, it stands almost straight up. It's in the spare tire well mounted leaning slightly forward against the wheel well with the nitrous output facing the front of the car. I've thought about fabbing something up so that I can lie it down in there but the people I have talked to say it's ok the way it is.
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Thread Starter
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wow what was your ET? 11.8 at 109? whew. i've actually gone 12.6 at 110 ont he motor once. seems to me like you're slowing down at the top of the track or something. maybe me too i guess
Do you think the converter is letting go? I had a problem similar to that with a buddy of mines nova that ran ok on motor but it would start to slip on the big end on the bottle and give crappy times on the bottle. Changed the converter and we blew the motor on the bottle and it coasted to a 10.21 at 98mph.
Thread Starter
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Do you think the converter is letting go? I had a problem similar to that with a buddy of mines nova that ran ok on motor but it would start to slip on the big end on the bottle and give crappy times on the bottle. Changed the converter and we blew the motor on the bottle and it coasted to a 10.21 at 98mph.