"vacuum gauge" to balance stacks?

[kobrabytes]

Can anyone point me to a place that I can buy the vacuum gauges to balance my TWM stacks?

THanks in advance

len

[bobcowan]

This is what I use. Can't remember where I bough it, though.

http://www.compperformancegroupstore...ory_Code=TOOLS

[sllib]

Would a motorcycle set-up work?

[sicilian cobra]

Maybe this will work
http://www.eastwoodco.com/shopping/p...word=colortune

[kobrabytes]

I believe my throttle bodies are 58 millimeter, are the bike ones large enough?

[Gaz64]

Two sets of these would give you the best balancing system:

http://cgi.ebay.com/ebaymotors/ws/eB...3AIT&viewitem=

If you have a vacuum port per runner which are all gathered for vacuum brakes, then just disconnect the plumbing to hook up the gauges to each runner for idle balancing.

[kobrabytes]

Nice, yep that would be accurate.

There are ports on each of the stacks, just really hard to get to once everything is put together.

I like those.

[kobrabytes]

A friend pointed me to these on the weber site:

http://www.webercarbsdirect.com/BK_p/bk.htm

Like those in the first response, but less money!

[twobjshelbys]

I got this one:

Edelbrock 4025 Uni-Syn Carburetor Balancing Instrument

http://performanceparts.com/part.php?partID=64554

but I got it from Amazon because it was cheaper (no shipping charge for 2 day shipping because my wife signed up for a fixed price shipping deal). Ignore the picture on Amazon, the part number is correct.

[kobrabytes]

How large of bore do they work with?

[RICK LAKE]

kobrabytes Len I am running alpha-n on my car since the 482 is in the car. My laptop battery crapped out and kill my laptop. I only have a sloppy disc right now and no way to transfer it to anything. The other thing is every motor is different and my custom setup will not help you at this time. I am running 50 pound injectors with 52 psi fuel pressures. At WOT my duty cycle is 61%. Idle pressure is 44 psi fuel. Fred Kemmer may be able it shoot you a copy of his setup. He's running XFI and 58mm's. May computer in the car is an old Speed-Pro, about 10 years old. Rick L.

[kobrabytes]

Originally Posted by RICK LAKE

kobrabytes Len I am running alpha-n on my car since the 482 is in the car. My laptop battery crapped out and kill my laptop. I only have a sloppy disc right now and no way to transfer it to anything. The other thing is every motor is different and my custom setup will not help you at this time. I am running 50 pound injectors with 52 psi fuel pressures. At WOT my duty cycle is 61%. Idle pressure is 44 psi fuel. Fred Kemmer may be able it shoot you a copy of his setup. He's running XFI and 58mm's. May computer in the car is an old Speed-Pro, about 10 years old. Rick L.

Totally understood. I'm just trying to get a feel for the graphs.

I've got my alpha N set up pretty linear right now. I need to add fuel more mid rage TPS and RPMs to eliminate the hesitation. I'm also trying to get the car on a dyno.

How do I reach Fred?

len

[fkemmerer]

Originally Posted by kobrabytes

Totally understood. I'm just trying to get a feel for the graphs.

I've got my alpha N set up pretty linear right now. I need to add fuel more mid rage TPS and RPMs to eliminate the hesitation. I'm also trying to get the car on a dyno.

How do I reach Fred?

len

Len,

Hi. I am on this forum as Rick indicated in his post. I'm curious why you went to alpha-N vs. sticking with speed-density and solving your problems another way. Alpha-N is great on the drag strip where you run the motor at 2 setting - idle and WOT but its usually not the best choice (or necessary) for the street.

- Fred

[Cobra #3170]

Originally Posted by RICK LAKE

kobrabytes Len I am running alpha-n on my car since the 482 is in the car. My laptop battery crapped out and kill my laptop. I only have a sloppy disc right now and no way to transfer it to anything. The other thing is every motor is different and my custom setup will not help you at this time. I am running 50 pound injectors with 52 psi fuel pressures. At WOT my duty cycle is 61%. Idle pressure is 44 psi fuel. Fred Kemmer may be able it shoot you a copy of his setup. He's running XFI and 58mm's. May computer in the car is an old Speed-Pro, about 10 years old. Rick L.

Rick,
why is your idle pressure lower than WOT pressure? My regulator holds pressure at the same level throughout the load range. Do you have lower alternator voltage at idle?
I am running 65# injectors at 45 psi with a Bosch inline pump fed by a Carter electric and the pressure stays at 45 psi no matter what I do with load. I have a Denzo 65 amp 3 wire feeding a 6AL, electric water pump, FAST Sequential EFI, both pumps, PI data logger and a 16" electric fan so fairly large electrical load. I also use Alpha N because cam overlap does not allow
use of the MAP sensor.

[Rwillia4]

Check your close loop setup
...I know our setups are different

[kobrabytes]

Originally Posted by Rwillia4

I know in my setup when I go to idle for more than 30 seconds my O2 sensor does not have enough heat to continue reading and it goes to a open loop setting (which is very rich). my sensor is located at the end of my collectors.
...I know our setups are different

FAST?

That shouldn't be happening.

Have to ever logged a session to see what is going on?

[Rwillia4]

After I re-read about it (on page 102 of the manual), I realize it was it dropping below the min RPM (it was right on the edge). Two cut offs that will put you into open loop mode: coolant temp and RPM. There are some other items in there also worth reading.
I agree it is not due to heat at the O2 sensor.

[kobrabytes]

Originally Posted by Rwillia4

After I re-read about it (on page 102 of the manual), I realize it was it dropping below the min RPM (it was right on the edge). Two cut offs that will put you into open loop mode: coolant temp and RPM. There are some other items in there also worth reading.
I agree it is not due to heat at the O2 sensor.

Ye, I don't think you want to be in closed loop at idle. There are too many things that are going on until the engine heats up. I have the idle really solid, although a bit high right now as I keep leaning out the lower left cell to get a better A/F ratio.

What mode do you run in? speed density or Alpha N?

[RICK LAKE]

Cobra #3170 I have a vacuum controlled regulator in my fuel system. My system was setup for a blower setup with a Paxton. you need 1-3 pounds of fuel for every pound of boost you make. IMO it's the supply at a steady pressure more than the pressure of the Fuel. I was only going to 10 psi for the system. I have too many little issues with the setup and belt I was running. Lack of hood clearance at this time didn't help either. I now have a paxton hood and may down the road retry this setup. I have an 70 amp orginial Alt setup with external regulator. It is not enough because of the added things on the car I have run. I have the ECU, 3 cooling fans, 2 (255liters pumps) MSD 6AL, 2 (4") cooling fans under the hood, and trans and readend cooler in the near future. Like Freds car I am going to a 130A alt setup. This is needed to all the power I am now running. Amp gauge needs to be changed to a Volt Gauge. Some rewiring also will be needed. I do know from racing that my Alt can't keep up my battery at full charge (12.6-12.8 volts) and run all the other power components. My alt only puts out about 35-38 amps under 1000 rpms. Just the 3 fans, MSD, ECU and fuel pump Draw more power than this and drain the battery. At 10.2 volts my MSD will not fire the spark plugs. I did get a little side tracked but have found that dropping the fuel pressures only at idle rpms with large injectors, IMO helps at idle to fine tune the motor. I have no smoke of any kind when I hit the throttle and no delay of responce from the motor. The fuel pressure goes from 43-44 psi to 52-54psi under a drop of a vacuum signal to the regulator. IMO a believe in having way too much supply and volume to a fuel system. 2 1/2" seperate fuel supply lines with a fuel pump on each one and 1 return line of 3/8". My gas gets warm after a 20 minute race run, but has not cause any problems yet. I do run between 1/2 and 3/4 of a tank of gas going out for each run and come in with just under 1/2. This is straight pumped gas. Hope this help with your question.

[kobrabytes]

Hi Rick,

Does the alternator fit an FE without using different mounts? I searched, but could never find anything that wasn't too deep.

len