 New guy carb question- how to select the right jets? |
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| Chily89 |
 Oct 13 2014, 07:28 PM
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Newbie  Group: Members Posts: 2 Joined: 13-October 14 From: Ohio Member No.: 18,013 Region Association: Upper MidWest  |
I'm helping my friend get his car working correctly. We are having some carb issues. What is the process for getting the correct idle jets? I have read instructions on the redline website but I'm still having issues. The 914 is a 4cyl 2270 with dual weber 44 Idf's.
I read something about removing the main stacks then driving around. Can somebody please explain this method further. |
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| McMark |
Oct 14 2014, 09:29 PM
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914 Freak! Group: Retired Admin Posts: 20,180 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
What you're describing about the AFR sounds like narrow-band activity. Something is weird with your setup. You need to get that working right as the first step. Most AFR setups can be programmed to act like a narrow band sensor. Lets work on that first. What model AEM gauge do you have?
stugray - Narrowband AFR gauges are nearly useless. Wideband are very useful. |
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| stugray |
Oct 14 2014, 10:00 PM
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
QUOTE(McMark @ Oct 14 2014, 09:29 PM)  stugray - Narrowband AFR gauges are nearly useless. Wideband are very useful. I have an innovate LC-1 which is a wideband. The other guys at the track that have WB AFR all say that the measurement cannot be trusted unless you are at WOT. My datalogs back that up. The numbers are all over the place unless you are basically in a steady pull. It's still better than not having one, but trying to tune via AFR at idle in the garage will drive you nuts. |
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Posts in this topic
Chily89 New guy carb question- how to select the right jets? Oct 13 2014, 07:28 PM
ThePaintedMan
I read something about removing the main stacks t... Oct 13 2014, 09:04 PM
McMark
I read something about removing the main stacks ... Oct 13 2014, 10:52 PM Chily89 There currently is an AEM wideband installed. The... Oct 14 2014, 04:58 AM ThePaintedMan When you say it's "always too rich",... Oct 14 2014, 05:56 AM tornik550
When you say it's "always too rich... Oct 14 2014, 06:15 AM tornik550
When you say it's "always too rich... Oct 14 2014, 06:40 AM ThePaintedMan Okay Tornik, that makes sense.
36s should be in t... Oct 14 2014, 07:36 AM tornik550
Okay Tornik, that makes sense.
36s should be in ... Oct 14 2014, 07:46 AM stugray AFR gauges are nearly useless except at WOT with a... Oct 14 2014, 09:38 AM tornik550 Thank you for every ones help. I found a very in... Oct 15 2014, 05:45 AM ThePaintedMan Yes. Which is why I suggested to start there first... Oct 15 2014, 06:04 AM stugray
Stu - think of it this way, widebands operate usi... Oct 15 2014, 07:14 AM ThePaintedMan Hope this doesn't get too hijacked...
But St... Oct 15 2014, 07:51 AM |
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