Small carb. adjustments make a big difference
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ddonaca351
Active Member
LOL... yeah, and with traction (2.xx 60') you'd gain another 2-3 tenths.
Try a set of drag-radials or some gooood sticky street tires.
DD
Try a set of drag-radials or some gooood sticky street tires.
DD
thehueypilot
Active Member
Wideband takes all the guess work out of air/fuel readings.......I wish I had bought my Innovate meter a lot sooner.
KEEP GOING UP !!!
Make sure the jets are equal from front to back. There should be about a 10 point spread or so from front to back. Widebands are great, but only tell you what the gases are showing. If you go to rich in the back, the meter could should a good AFR, but may be lean up front. Like if you have 75's up front and 90's out back.
Make sure the jets are equal from front to back. There should be about a 10 point spread or so from front to back. Widebands are great, but only tell you what the gases are showing. If you go to rich in the back, the meter could should a good AFR, but may be lean up front. Like if you have 75's up front and 90's out back.
iskwezm
10 Year Member
can you give a little more info on the LM-1,i have read a little about it,but what can/cant it do and would i really need it on a blown applicationthehueypilot said:
Thanks
thehueypilot
Active Member
The meter is a wideband meter so you can set the idle A/F in real time. I use it for drag racing to record each run to evaluate the A/F vs. RPM. It will record up to approx 80 minutes so just before I stage, I hit the record button. The graph will show you your RPM's (shift points) and A/F for the entire run. I start out adjusting the front jets in the garage by reving the engine to about 3.5k to get the A/F reading for the front only. I want a reading of about 12:1 on the front only then adjust the back to be eight numbers greater. (Vac Sec Carb) The actual run will show your total A/F.(Front and Back combined) Check out there website: www.innovatemotorsports.com
thehueypilot
Active Member
I switch carbs like I change underwear.....daily. (not really....the carb part) I had too many random bogs at launch with the DP with put me out of the race a couple of times (maybe due to change in temp?), but the Vac sec seems to be just right. My best run to date was with the 850 Vac Sec. I am building a 750 Vac Sec to experiment with as well to get the incoming air at it's highest velocity.
thehueypilot
Active Member
Edbert said:
It has it's own hand held computer with an LED readout with a cable that plugs into a standard Bosch oxygen sensor and a inductive clamp to read RPMs. It's info can be download into a PC to replay the run in real time and/or study the graphs.
thehueypilot said:
yeah, it's very hard to tune the pumpshot if you are having traction problems. Spinning causes a lighter load. So you don't notice that's it lean. The next time around, when it hooks better, you have a bigger load, then she goes lean. I had a helluva time. I'd finally get it to hook, then it would bog. Then I'd up the pump shot, and it'd spin because of more power. went round and round with the for about 3-4 months.
thehueypilot
Active Member
I could not hit my dial in because of the random bog or the drastic outside temp. It keeps changing from mid 70's during time trails to mid 50's during eliminations. I hope to have the traction problem solved this Sunday with 3.55 gears.
iskwezm
10 Year Member
