Happy New Years and all that good stuff!
So I moved back to Louisiana and got my car out today for some tunning. Figured it would be better to put all of this on one thread instead of a bunch of different ones.
Here is what I saw today.
Checked timing: set it at 34* at 3000 rpm initially and left alone. What I saw today is 14* at 1000 +-100 rpm. Checked advance from 2000-3000 and it's all in before 2500 rpm. Once I hook up the vacuum advance the rpm jumps 400 +-100. Does this sound right?
Mind you the vac advance is hooked to the manifold vacuum. If I idle the engine down to 1100 with the vacuum advance hooked up the rpm drops to about 800 or so when I stop. I'm guessing the manifold vacuum drops and can't keep the rpms up? How should I set the idle speed? If I'm stuck at a 1500 or so idle speed I'll live with it, but just want to make sure I'm doing this right. If you guys think the timing is off let me know. I know this needs to be dialed in before I get the carb done.
Now to fuel. At idle I've got it staying 13.7-14.9. Sound good? Once I hit the gas it drops to about 11.5-12.5. I know I need to work that one out. Out on the road wot in first drops to 11 second drops to 11.5 and creeps up to 13.5 and in third I start leaning out to 13 and creeps into 15s before I shift. Once I'm cruising I stay at 14-15 but if I punch it in fourth I'll lean out to 17. Bigger jets? Or power valve?
I have a 10.5 in there now an 66 primary an 64 secondary jets installed right now.
Also, should I put a fuel regulator in my plumbing? I know they aren't very expensive I just wonder what size I need to get for the Holley? 1-4 psi? Or 4-9 psi?
One thing I noticed today is that I can't tell if the secondary is full or empty when I look through the the sight glass. It started raining on me so I didn't pull the carb to check, but I may be doing that once I get our garage cleaned up so I can fit the car in.
Even with all that I can say that it has a ton more power than before. Timed 0-60 at 5.4. I don't think that is bad at all for a 250, 3.97 first, open 3.00 in the back, and some wet roads lol
Hope you boys and girls are having a great New Year's Eve and be safe!
So I moved back to Louisiana and got my car out today for some tunning. Figured it would be better to put all of this on one thread instead of a bunch of different ones.
Here is what I saw today.
Checked timing: set it at 34* at 3000 rpm initially and left alone. What I saw today is 14* at 1000 +-100 rpm. Checked advance from 2000-3000 and it's all in before 2500 rpm. Once I hook up the vacuum advance the rpm jumps 400 +-100. Does this sound right?
Mind you the vac advance is hooked to the manifold vacuum. If I idle the engine down to 1100 with the vacuum advance hooked up the rpm drops to about 800 or so when I stop. I'm guessing the manifold vacuum drops and can't keep the rpms up? How should I set the idle speed? If I'm stuck at a 1500 or so idle speed I'll live with it, but just want to make sure I'm doing this right. If you guys think the timing is off let me know. I know this needs to be dialed in before I get the carb done.
Now to fuel. At idle I've got it staying 13.7-14.9. Sound good? Once I hit the gas it drops to about 11.5-12.5. I know I need to work that one out. Out on the road wot in first drops to 11 second drops to 11.5 and creeps up to 13.5 and in third I start leaning out to 13 and creeps into 15s before I shift. Once I'm cruising I stay at 14-15 but if I punch it in fourth I'll lean out to 17. Bigger jets? Or power valve?
I have a 10.5 in there now an 66 primary an 64 secondary jets installed right now.
Also, should I put a fuel regulator in my plumbing? I know they aren't very expensive I just wonder what size I need to get for the Holley? 1-4 psi? Or 4-9 psi?
One thing I noticed today is that I can't tell if the secondary is full or empty when I look through the the sight glass. It started raining on me so I didn't pull the carb to check, but I may be doing that once I get our garage cleaned up so I can fit the car in.
Even with all that I can say that it has a ton more power than before. Timed 0-60 at 5.4. I don't think that is bad at all for a 250, 3.97 first, open 3.00 in the back, and some wet roads lol
Hope you boys and girls are having a great New Year's Eve and be safe!