| Author |
Message |
Bob Brugge
Samba Member
Joined: April 09, 2015
Posts: 721
Location: Missoula, MT
|
 Posted: Mon Jun 18, 2018 8:15 pm Post subject: Carb Question |
 |
|
Hi Guys,
I did a very bad thing and bought some 34 ict knock offs. They run sweet! Engine runs cool, very little hesitation, everything is happy.
But! The carbs are set for sea level. I am at 3300 ft. Do I need to rejet? I am happy with it the way it is now, just don't want to unwittingly damage something as I know NOTHING about carbs.
Doesn't smell rich, fires right up and idles whether hot or cold. Goes like a BEAST compared to the leaking 30/31 I had on it.
What do I need if anything and what benefit will it give?
1679 dp motor w/ uh oh 9, 1.25:1 rockers, header and quiet pack muffler.
Thanks in advance!
_________________
Keep on Dubbin'! |
|
| Back to top |
|
 |
slalombuggy
Samba Member
Joined: July 17, 2010
Posts: 9147
Location: Canada
|
| Posted: Tue Jun 19, 2018 6:49 am Post subject: Re: Carb Question |
|
|
What do your plugs look like? You might have to drop one size on your mains and idles to adjust for altitude
brad |
|
| Back to top |
|
|
Frank Bassman
Samba Member
Joined: July 01, 2012
Posts: 894
Location: Miami
|
| Posted: Tue Jun 19, 2018 8:34 am Post subject: Re: Carb Question |
|
|
Yes, show us a picture of your spark plugs.
-Frank |
|
| Back to top |
|
|
FreeBug
Samba Member
Joined: March 12, 2012
Posts: 4278
Location: deepest, darkest Switzerland
|
| Posted: Tue Jun 19, 2018 9:13 am Post subject: Re: Carb Question |
|
|
| If you're uncomfortable messing with them, and you're getting the mileage you'd expect, and you're sure they're not lean at WOT, then let sleeping dogs lie. |
|
| Back to top |
|
|
Bob Brugge
Samba Member
Joined: April 09, 2015
Posts: 721
Location: Missoula, MT
|
| Posted: Wed Jun 20, 2018 8:43 pm Post subject: Re: Carb Question |
|
|
I will pull them and post pics tomorrow. As far as letting sleeping dogs lie, I am good with that as long as there is no risk of long term damage due to ?
_________________
Keep on Dubbin'! |
|
| Back to top |
|
|
Pruneman99
Samba Member
Joined: February 22, 2012
Posts: 5013
Location: Oceanside
|
| Posted: Wed Jun 20, 2018 8:56 pm Post subject: Re: Carb Question |
|
|
Rich is ok. Won't hurt anything but your mileage and the ozone layer. If it's puking gas out of the tailpipes, that's another story.
On the other hand, lean will melt your engine. I doubt your lean if the carbs were jetted for sea level and your at 3,000 ft.
But it's best to find out. A wideband is best but you can get an idea from your plugs. They should be tan. Black is rich, white is lean. (This is a generalization of course.) |
|
| Back to top |
|
|
Bob Brugge
Samba Member
Joined: April 09, 2015
Posts: 721
Location: Missoula, MT
|
| Posted: Fri Jun 22, 2018 1:06 pm Post subject: Re: Carb Question |
|
|
My plugs look good, reddish brown on the electrode. Could probably run a touch leaner, but I am happy with what I got. I can post pics for a second opinion, but I am not sure if the crappy phone camera took a good shot or not, the lighting was suboptimal.
_________________
Keep on Dubbin'! |
|
| Back to top |
|
|
Bob Brugge
Samba Member
Joined: April 09, 2015
Posts: 721
Location: Missoula, MT
|
| Posted: Fri Jun 22, 2018 4:25 pm Post subject: Re: Carb Question |
|
|
Photos of the plugs, sorry about the lighting.
They are not as black as they look.
_________________
Keep on Dubbin'! |
|
| Back to top |
|
|
PumaVW79
Samba Member
Joined: January 31, 2012
Posts: 487
Location: WGS84: 22.9083° S, 43.1964° W
|
| Posted: Sat Jun 23, 2018 6:02 am Post subject: Re: Carb Question |
|
|
| Bob Brugge wrote: |
They are not as black as they look. |
More or less like this?
|
|
| Back to top |
|
|
Bob Brugge
Samba Member
Joined: April 09, 2015
Posts: 721
Location: Missoula, MT
|
| Posted: Tue Jun 26, 2018 5:29 pm Post subject: Re: Carb Question |
|
|
| PumaVW79 wrote: |
| Bob Brugge wrote: |
They are not as black as they look. |
More or less like this?
|
Yes, exactly like that.
_________________
Keep on Dubbin'! |
|
| Back to top |
|
|
mcmscott
Samba Member
Joined: March 12, 2010
Posts: 4858
Location: sanger ca
|
| Posted: Tue Jun 26, 2018 5:37 pm Post subject: Re: Carb Question |
|
|
You cannot see the insulaters in any of those pics. And remember the color you are seeing is at the time the engine was running, meaning if you pulled into your driveway now you are looking at the idle mixture screws. If you are trying to read plugs for the main circut you have to have the engine loaded at rpm then shut off emediatly( my spelling is getting bad, maybe Tucker understands), then check. Old school drag racers check plugs at the end of the track or tow to pits to check.
_________________
There are no stupid questions, only stupid people,
68 Ghia
67 T-1
65 Notch
02 Mexican beetle
74 Thing
15 Long travel rail
07 Nomad
05 f-250 |
|
| Back to top |
|
|
|
