Carburetor Central
If you have questions about the SU Carburetors, this is where you can find the answers.
Subforums
-
- 849
- posts
-
- 1.5k
- posts
1,458 topics in this forum
-
- 6 replies
- 3.2k views
Car is back in commission from paint shop. Still undecided if i should purchase a 3 - 4 psi electric fuel pressure or use my current 5 to 9 PSI Airtex 8012S electric fuel pump with an Holley external regulator. I read the Mallory COMP 4070LP did the job and was adjustable by its own but they seem hard to find. Any recommendations for an adjustable and reliable electric pump?
Last reply by jalexquijano, -
-
- 3 replies
- 1.5k views
Does anyone have any spare or a lead to who supplies sets of main jets for the triple SK carbs? I preferably need size 150, 160 and 170. I thought Mikunis where compatible but they're not. The jets I have now were drilled out more by the previous shop and been running really rich.Thanks in advance.
Last reply by 240Ziggy, -
- 2 followers
- 36 replies
- 8.2k views
Question is about carb tuning... Running stock round top SU's. Z therapy rebuild kits, ATF in the dashpots, SM needles. 260Z intake manifold. Electronic fuel pump. Again...L28, high compression, E31 head, 500/500 cam. Ported, 6-1 header...etc. I just got an Innovate LM-2 the other day to see how things were looking in the tune. Overall...idle...for some reason...it's reading in the 30-40's...which makes no sense...but regardless... At cruise...things look pretty good...between 15-16. Rolling into throttle at 3.5K at about 30-40% throttle...things go lean...like 17's and there is a slight stutter. But if I push throttle beyond that (50-60%) it richens bac…
Last reply by blodi, -
- 3 followers
- 22 replies
- 6.3k views
Attention all Mikuni Users: We were all at a loss when Todd (Wold Creek Racing) passed away, and the knowledge that left with him for our Mikuni Carbs….not to mention all the parts that he had. I know there are other authorized dealers of Mikuni parts on the internet, but without the knowledge to share there are just another parts shop with no first-hand knowledge for the sale. I have found a great new resource on Mikuni PHH carbs and he is willing to share his knowledge and is also an authorized distributor for Mikuni – David Premo A few weeks ago I called up Dave Rebello and asked him if he was interested in me purchasing a few parts and pieces for my…
Last reply by Captain Obvious, -
- 3 replies
- 1.4k views
Well my '71 had been ruuning like crap for a while, so I decided to set the floats, make sure that the needles were set correctly, etc. After getting the carbs back together, The car won't idle below 3300 RPM! I've back the idle screws out and, tried raising the jets but none of that had any effect on the idle. What else could cause the idle to go that high??? TIA!
Last reply by siteunseen, -
My early 1974 260Z was recently run on a chassis dyno to tune the Mikuni 40PHH carbs. The tuning is not complete. But, so far, 139 bHP and 143 ft lbs have been measured at the rear wheels. Based on the following drive train description, what are realistic performance expectations? Thanks Drive Train Description Production date: April 1974 Air box: K&N Lamborghini 3-carb filter in Jim Wolf Racing aluminum housing with Mikuni air horns Alternator: 60 amp Camshaft: Racer Brown SS-54-110 – 236 degree duration at 0.025” lif…
Last reply by 123ignitionusa, -
-
- 2 replies
- 965 views
While adjusting my carbs that hose is open to the atmosphere. Should I plug it or just leave it open? Thanks in advance.
Last reply by siteunseen, -
- 2 followers
- 32 replies
- 4.7k views
Needed SU carbs in good shape at a reasonable price. Can you help? Id appreciate it much! Kira The little Z lady
Last reply by KiraK, -
- 9 replies
- 1.7k views
I've deleted the heater core and the carburetor coolant lines, temporarily for the heater core but permanent for the carbbies. Please let me know if I've missed something or screwed up somehow. Thanks, Cliff
Last reply by siteunseen, -
- 17 replies
- 5.3k views
Almost a year ago I installed a Carter P60504 electric fuel pump and Holley adj. fuel pressure regulator. I also removed the mechanical pump that had been restored by the previous owner and installed a billet alum. block off plate. I made this change since I only drive the car every 3-5 weeks and the engine would need a lot of rotations to get fuel to the pump and fills the carb bowls enough to start. The electric pump gets the line and carb bowls filled much faster thus making it easier to start the car with less revolutions of the motor. I have been working to make my car as correct as possible while maintaining as much reliability that newer components offer. With…
Last reply by psdenno, -
- 1 follower
- 21 replies
- 2k views
Background: I removed the rear bumper from my early 260Z. In order to do this, I had to drop the tank. The larger vent hoses had been replaced some time in the past with regular fuel hoses. Before putting the tank back into place, my friends and I replaced the 5/16 inch lines and fuel filter, the 3/8 inch vent hose and the 1/4 inch vent hose. Apparently I cut the 1/4 inch line a little short, but we got it to the expansion tank. I put the fuel back into the tank and filled it later in the evening. Today I was driving the car around 60 MPH when I noticed a change in the exhaust note going uphill. This was accompanied by a lack of response when I pressed o…
Last reply by Captain Obvious, -
- 0 replies
- 1.8k views
Two questions: 1. WHere exactly is the best place to measure the fuel pressure at the car? On the fuel line that goes to the rear carb or between the fuel filter before the gas gets through the fuel rail? 2. Which of this two pumps can dial approximately between 3.5 to 4 psi and less noisy: Airtex 8012S http://www.summitracing.com/int/parts/atx-e8012s/overview/ or Mallory 4070LP http://www.summitracing.com/int/parts/maa-4070lp/overview/ For the airtex 8012s, i guess i will need a fuel pressure regulator. Not sure yet!
Last reply by jalexquijano,
.thumb.jpg.75165ae25cbc256d967cf4697fa089e3.jpg)
-
Recently Browsing 0 members
- No registered users viewing this page.
scarguy055
