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  Topic Review (Newest First)
07-26-2019 12:05 PM
bfeng I have an Innovate AFR and use it both bung-mounted as well as with a tail pipe adapter. The tail pipe adapter can be less accurate at idle due to reversionary air flow contamination.

But under driving conditions I’ve found both mounting schemes provided consistent info. Makes tuning carbs much easier.
07-23-2019 08:32 PM
DPeterson3 Cheap soft mounts are very expensive.

Buy the best quality you can find.
Trust me on the Franck VF tube concept. Changes the entire thinking around Webers. Frankly, his explanations suck. But the tubes work.
07-23-2019 07:43 PM
alfaparticle
Quote:
capturing the AFR and RPM simultaneously is highly desirable
I would say it is essential for setting up carbs. Even on a dyno where you don't have to steer or brake it is hard to determine at what rpm an AFR dip or bump occurs by trying to simultaneously monitor the tach and the AFR readout.
07-23-2019 07:27 PM
65Sprint
Quote:
Originally Posted by 930cabman View Post
We will not be using the OBD function or the RPM function.
I know nothing about the Innovate devices but capturing the AFR and RPM simultaneously is highly desirable.
07-23-2019 04:48 PM
930cabman
Quote:
Originally Posted by slowcreek View Post
Does it have a way to just monitor air/fuel ratio? Commonly referred to as AFR.
Yes, I need to learn how to operate it.

BTW: I have a flip phone, no smart device for me
07-23-2019 03:17 PM
slowcreek
Quote:
Originally Posted by 930cabman View Post
Thanks, back to the basics. If all the systems are not correct fooling with the carbs is a waste of time.

Hoping to get this issue cleared up and then on to setting the Webers up. We have an Innovate LM 2 with the tail pipe adapter. Has anyone had luck with this setup? I have never used it, but does look somewhat confusing. We will not be using the OBD function or the RPM function.
Does it have a way to just monitor air/fuel ratio? Commonly referred to as AFR.
07-23-2019 10:04 AM
930cabman Thanks, back to the basics. If all the systems are not correct fooling with the carbs is a waste of time.

Hoping to get this issue cleared up and then on to setting the Webers up. We have an Innovate LM 2 with the tail pipe adapter. Has anyone had luck with this setup? I have never used it, but does look somewhat confusing. We will not be using the OBD function or the RPM function.
07-23-2019 05:05 AM
slowcreek
Quote:
Originally Posted by 930cabman View Post
Last night I was able to spray some starting fluid around the carb soft mounts and the engine speed increased and smoothed out. Seems as new soft mounts are the next step. Centerline has them for $25./each, it sounds like a no brainer. I also connected a vacuum gauge and the needle was bouncing all over the place, telling me a vacuum leak. If vacuum leaks exist, I don't think any amount of carb tuning will provide the desired result.
Exactly. Nice find.
07-23-2019 03:52 AM
930cabman Last night I was able to spray some starting fluid around the carb soft mounts and the engine speed increased and smoothed out. Seems as new soft mounts are the next step. Centerline has them for $25./each, it sounds like a no brainer. I also connected a vacuum gauge and the needle was bouncing all over the place, telling me a vacuum leak. If vacuum leaks exist, I don't think any amount of carb tuning will provide the desired result.
07-22-2019 10:03 PM
DPeterson3 I recommend you try a set of Keith Franck’s “VF” tubes before you get lost swapping emulsion tubes.

Also, make sure you’ve got at least a 33 Venturi. With hot cams, I’d try 34 or 35 at least, but WITH the VF tubes.
07-22-2019 09:15 PM
slowcreek
Quote:
Originally Posted by 930cabman View Post
We have an Innovate LM 2 with the tail pipe adapter. Has anybody had luck with these? or is it recommended to drill/weld the bung?

My buddy used an older model than that for years and loved it.
The bung would be faster reacting, but at this point not crucial.

Any measuring device is a great tool in determining your jetting needs.

It's the most accurate and efficient route to take.

I could give you my jetting specs but they're not necessarily gonna work for you. It's all a guess, and i suspect you don't need any more guesswork.

I live at 5300 foot elevation. What's your elevation? These are factors that can make or break you without proper diagnosis.
07-22-2019 06:02 PM
930cabman We have an Innovate LM 2 with the tail pipe adapter. Has anybody had luck with these? or is it recommended to drill/weld the bung?
06-13-2019 11:12 AM
GTA R
Quote:
Originally Posted by quadrifolio View Post
model 44/45 is an EmCon (Emision Control) carb idd for 1.6 so you have to stick with the original E. Tube otherwise they are never going to work properly. Normal DCOE´s (No EmCon carb) use a total diferent E. Tubes, so the E. Tubes are not interchangable between EmCon carb and No EmCon carb (any number above DCOE32 is an EmCon carb)
Nearly right. 33's, 34's, 35's, 70/71's, 90/91's aren't true Emission Control carbs either.
06-12-2019 01:24 PM
Aubryl 32mm (DCOE 44/45 is normally 30mm). And you’re right: I may be too rich as I went back to std set up (117 main jet, 180 air jets and F16 tube), and transition
was much better. I also checked the cams timing, and it seems my exhaust valves are opened 0.15mm too high at BDC. So I probably have a bit more valve overlap than it should. I’ll correct that tomorrow and see the effect. But in any case I think I now need a rolling road and check my air/fuel ratio to make sure my engine runs properly
06-12-2019 09:48 AM
alfaparticle 0.5 mm should not make much difference.

A friend - 65Sprint, asked me to drive his car and tell him what I thought about it. It had a flat spot around 4000 rpm. He thought that it was lean and he was using larger than normal main jets. I lent him my wideband AFR and he found that it was too rich. He was then able to eliminate the flat spot by installing smaller jets. Even experienced drivers can find it hard to distinguish between an overly rich and an overly lean condition.

What size venturis (chokes) are in your carbs?
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