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Topic Review (Newest First)
07-26-2010 09:54 AM
TireTracks
Quote:
Originally Posted by kyle86
Does that really work? like a wideband?
I would think so. I have a feeling a pre-built wideband uses normal o2 sensors.

I read about it here- http://www.bob2000.com/carb.htm
07-26-2010 09:49 AM
kyle86 Does that really work? like a wideband? I know I'm in the ballpark. Now I'm just trying to fine tune.
07-26-2010 04:13 AM
TireTracks
Quote:
Originally Posted by kyle86
I see that, it's like everyone has a different opinion on what the ideal plug should look like ha. I will eventually buy an WB o2 when I get some money, but right now I'm stuck trying to read plugs and timeslips.
I read about a cheap way to make a O2 setup.

You get a Normal O2 sensor, then hook a multimeter up too it, and use the voltage to tell you were in the A/F range you are.
07-26-2010 04:11 AM
TireTracks
Quote:
Originally Posted by kyle86
I see that, it's like everyone has a different opinion on what the ideal plug should look like ha. I will eventually buy an WB o2 when I get some money, but right now I'm stuck trying to read plugs and timeslips.
I read about a cheap way to make a O2 setup.

You get a Normal O2 sensor, then hook a multimeter up too it, and use the voltage to tell you were in the A/F range you are.
07-26-2010 12:30 AM
kyle86 I've seen those pictures before, but not sure if they're good to go by or not. I can't get any color at all on the threads base ring.
07-25-2010 12:18 PM
automotive breath Your plug heat range looks a little too cold

read plugs

"The white porcelain does not indicate jetting !! Do not look at the porcelain
insulator for jet changes ... instead look at the plug's base ring"

07-25-2010 11:48 AM
kyle86
Quote:
Originally Posted by Dajerseyrat
See how the difference in opinions on the color of the plug vary...I would invest in a nice Widband O2 sensor like a Innovate brand, or AEM...These will allow you to bring a laptop to the track and log the pass in real time, then go back and look at the data of the A/F..

I personally like my pump gas N/A cars in the 12.5-13.0 range for power and safety..
I see that, it's like everyone has a different opinion on what the ideal plug should look like ha. I will eventually buy an WB o2 when I get some money, but right now I'm stuck trying to read plugs and timeslips.
07-25-2010 11:47 AM
kyle86
Quote:
Originally Posted by ericnova72
Drill and tap the PVCR's to 6-32 thread so it will accept screw-in restrictions. You can either get them predrilled, or buy blanks and drill your own.
Is there a link you can post of these? I am very interested in them.
07-25-2010 09:41 AM
Dajerseyrat See how the difference in opinions on the color of the plug vary...I would invest in a nice Widband O2 sensor like a Innovate brand, or AEM...These will allow you to bring a laptop to the track and log the pass in real time, then go back and look at the data of the A/F..

I personally like my pump gas N/A cars in the 12.5-13.0 range for power and safety..
07-25-2010 03:58 AM
ericnova72 Drill and tap the PVCR's to 6-32 thread so it will accept screw-in restrictions. You can either get them predrilled, or buy blanks and drill your own.
07-25-2010 02:36 AM
kyle86
Quote:
Originally Posted by ericnova72
Looks pretty decent to me, heat range looks right, we prefer the heat line on the strap to be right at the bend, so you look fine to me. Like has been said, jet up and keep watching the mph.

If you keep jetting up and it goes faster, and you go more than 4 steps up in the front(or rear), .. and you street drive the car you can trade some of that fuel over to the power valve channel restrictions(PVCR), enlarge them and go back to leaner main jetting for economy. Get the best of both worlds that way.
Sweet, thanks! I guess I should try going up some, and down some and see how it responds.

Yea I've heard about drilling out the PCVRs. That's one thing I eventually want to try when I get the WOT tune down. I'm kinda nervous since it's irreversible, but metering blocks are cheap anyways.
07-25-2010 02:31 AM
kyle86
Quote:
Originally Posted by 4 Jaw Chuck
That plug looks slightly rich to me, not bad though and might be OK for power if the temps were high that day and you want a jetting that works for colder weather (under 60F).

I don't use rings on the insulator for checking jetting, the fuel today doesn't color them well like they did in the old days. Use the ground electrode instead, the tip should be blue and the carbon on it should be gone almost to the shell. Using that criteria that plug looks rich to me, unless your running race fuel of course.

Drop two sizes and post a pic again.
Thanks for the info! I will post an update after I drop a couple rear jet sizes. I have to order them from summit since I'm missing 78s.

Just curious, when you're looking on the ground strap, how do you defrentiate between fuel and the heat range? I know I can run a 1 step hotter plug and it will take the color past the bend. I'm a newb at spark pug reading so I'm trying to get the technique down. Thanks!
07-25-2010 02:16 AM
ericnova72 Looks pretty decent to me, heat range looks right, we prefer the heat line on the strap to be right at the bend, so you look fine to me. Like has been said, jet up and keep watching the mph.

If you keep jetting up and it goes faster, and you go more than 4 steps up in the front(or rear), .. and you street drive the car you can trade some of that fuel over to the power valve channel restrictions(PVCR), enlarge them and go back to leaner main jetting for economy. Get the best of both worlds that way.
07-25-2010 12:07 AM
4 Jaw Chuck That plug looks slightly rich to me, not bad though and might be OK for power if the temps were high that day and you want a jetting that works for colder weather (under 60F).

I don't use rings on the insulator for checking jetting, the fuel today doesn't color them well like they did in the old days. Use the ground electrode instead, the tip should be blue and the carbon on it should be gone almost to the shell. Using that criteria that plug looks rich to me, unless your running race fuel of course.

Drop two sizes and post a pic again.
07-24-2010 08:48 PM
SDLuck Reading spark plugs is like a science.I spent a lot of time on a dyno many years ago.Either go to a dyno or change jets and read mph.Anything else is asking for trouble.On a 1600 vw we dynoed the operator killed the motor on a load and we checked the plugs, they looked lean to all of us .The dyno operator was quiet,so I asked him. He said he couldn't read spark plugs but by the bsfc numbers it was rich so we leaned it out and over the process picked up 12 hp.Plugs always looked lean
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