Cam and gas mileage
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Cam and gas mileage Yea i know what a dumb question, but i need to ask it. I jsut recently got my cam installed, yes full tune, but needs more tune work. stay tuned for details. So i filled up the tank. Keep in mind it has been cold here in chi-town and even if i were to nail the car i would get no traction what so ever. Anyways, at about little over half tank i was at 100 miles. Now again i have not gone past 3K RPMs.... Before my cam, at half tank i would be at 150. What is the deal?
Ok back to why my car needs tuning. My car is going back in this monday. here is why. My car's idle is set at 1000 RPMs. I am going to request that it be set at 800-900. the decater (sp) rate is a little messed up too. Approaching a stop light/sign, i take the car outta gear and the RPMs fev up to 2000 - 2300 RPMs sit there intil i depress the clutch or until the motor itslef slows down. And at around 1500 - 1800 RPMs my car bucks, prolly b/c i need a gear. damn 3.42 (M6)
but that is why i think my gas mileage could suck b/c i need more tunning??
Any ideas???
Thanks
Ok back to why my car needs tuning. My car is going back in this monday. here is why. My car's idle is set at 1000 RPMs. I am going to request that it be set at 800-900. the decater (sp) rate is a little messed up too. Approaching a stop light/sign, i take the car outta gear and the RPMs fev up to 2000 - 2300 RPMs sit there intil i depress the clutch or until the motor itslef slows down. And at around 1500 - 1800 RPMs my car bucks, prolly b/c i need a gear. damn 3.42 (M6)
but that is why i think my gas mileage could suck b/c i need more tunning??
Any ideas???
Thanks
yes you need more tuning.... tuning is magic for these cars! i drove an untuned hotcam for 9 months, and it bucked like that and revved up at random times....gas mileage wasnt very good either, but she ran very rich..
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Originally Posted by RooRnZ28
yes you need more tuning.... tuning is magic for these cars! i drove an untuned hotcam for 9 months, and it bucked like that and revved up at random times....gas mileage wasnt very good either, but she ran very rich..
yea i still think that my car is running rich! granite i have an o/r h.. but you can smell it and i am gussing you can see the smoke to???
My gas mileage fell some. When I say some I mean not alot.
On the highway I can pull between 330 and 345 to the tank. On the street I get right at 275. I have an M6 with stock gears. 230/224 cam, and bolt ons with tune. I shift around 2k when driving around. I have noticed anything above that, and you can literally watch the gas needle head to E...lol.
On the highway I can pull between 330 and 345 to the tank. On the street I get right at 275. I have an M6 with stock gears. 230/224 cam, and bolt ons with tune. I shift around 2k when driving around. I have noticed anything above that, and you can literally watch the gas needle head to E...lol.
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Originally Posted by shouldaboughttheZ
My gas mileage fell some. When I say some I mean not alot.
On the highway I can pull between 330 and 345 to the tank. On the street I get right at 275. I have an M6 with stock gears. 230/224 cam, and bolt ons with tune. I shift around 2k when driving around. I have noticed anything above that, and you can literally watch the gas needle head to E...lol.
On the highway I can pull between 330 and 345 to the tank. On the street I get right at 275. I have an M6 with stock gears. 230/224 cam, and bolt ons with tune. I shift around 2k when driving around. I have noticed anything above that, and you can literally watch the gas needle head to E...lol.
yea i think that my tuning is off then.. Like i said i was not ever above 3000 and my milage sucks..
need to get rid of the bucking too.... glad you have great gas milage
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Originally Posted by purdueranger
15-17 in the city with warming the car up for 5 min. Highway between 23-25mpg.
I have a G5X4 with 4.30 gears. I drive 75mph in 6th gear which is just above 2100 RPMs.
I have a G5X4 with 4.30 gears. I drive 75mph in 6th gear which is just above 2100 RPMs.
damn.. that is still nice. I really need more tunning then. The shop told me that the car was on the dyno for 7 hours...............
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Originally Posted by TORCHD 02 TA
damn.. that is still nice. I really need more tunning then. The shop told me that the car was on the dyno for 7 hours...............
My car was on the dyno for 3-4 hours but the only changes I made between the first tune I had and a retune was a bigger cam and FAST 90/NW 90 setup.
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Originally Posted by purdueranger
My car was on the dyno for 3-4 hours but the only changes I made between the first tune I had and a retune was a bigger cam and FAST 90/NW 90 setup.
hmm what about me lol
Originally Posted by TORCHD 02 TA
damn.. that is still nice. I really need more tunning then. The shop told me that the car was on the dyno for 7 hours...............
Originally Posted by BriancWS6
The tuning your needing isnt on the dyno, but rather the drivability tuning.
sounds like they spent the majority of their time tweaking for the best HP numbers, but didn't do much to stabilize your idle or A/F ratio at part throttle.
Last edited by hammertime; Feb 11, 2007 at 12:06 PM.
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Originally Posted by BriancWS6
The tuning your needing isnt on the dyno, but rather the drivability tuning.
Yea, that for sure what i need drivabiltiy tunning!
Originally Posted by hammertime
+1
sounds like they spent the majority of their time tweaking for the best HP numbers, but didn't do much to stabilize your idle or A/F ratio at part throttle.
sounds like they spent the majority of their time tweaking for the best HP numbers, but didn't do much to stabilize your idle or A/F ratio at part throttle.
More opinions please
12.9 is excellent for WOT, but it should be stoich (14.7) or really close the rest of the time. There are several tweaks for getting the engine to return to a proper idle, from checking IAC motor position, to setting the throttle stop correctly, to adjust the throttle cracker, and on, and on.
I've not done any tuning yet, but I've researched it some. You may try searching, or get more specific answers in the Tuning Forum.
I've not done any tuning yet, but I've researched it some. You may try searching, or get more specific answers in the Tuning Forum.
After my cam install and tune my gas mileage has decreased severely. I used to get about 220 to a tank, now I have never broke 200, it's usually around 160-180 a tank. I always fill up after the check gauges light comes on.
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Originally Posted by SSINISTR SS
That's the problem with to many shops tuning. All they care about is a high number, when drivability is just as, if not more important.
i agree 100% that drivability is an important.... It goes back tomoroow so i will tell that what i am looking for
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Originally Posted by hammertime
12.9 is excellent for WOT, but it should be stoich (14.7) or really close the rest of the time. There are several tweaks for getting the engine to return to a proper idle, from checking IAC motor position, to setting the throttle stop correctly, to adjust the throttle cracker, and on, and on.
I've not done any tuning yet, but I've researched it some. You may try searching, or get more specific answers in the Tuning Forum.
I've not done any tuning yet, but I've researched it some. You may try searching, or get more specific answers in the Tuning Forum.
i will look in the tunning section.. thanks
