Quote:
Originally Posted by ericwoo
I've been putting in premium fuel which is usually 91 or 93. I thought Kauffman made it sound like they doubt I need it that high so occasionally put in mid grade 89 to test.
I've messed with timing settings dozens of times and nothing really improves performance significantly. Now timing is at about 15 degrees idle and goes up to around 32 degrees at 3,000 rpm.
I did recently adjust the carb mixture again with a richer mixture and seems to pick up a slight improvement. My guess is hp is on par to the 350 HO now which isnt too bad so I am not as disappointed as before but was really hoping to get at least a little more than that.
I'd guess the car probably does have around 320 horsepower like the HO but I have a very hard time seeing it have anywhere near 380 lb-ft of torque like the HO has.
The low end is what I would actually like to work on so I may order the Rhoads lifters that I recently learned about.
If I were to guess, I'd say this car might do around 14.5 secs in the quarter mile. I hope to test in a week or two and will report back.
Other than that, I am kinda hitting a wall with getting this 350 to excel better than the 350 HO. I am beginning to think that is the max possible performance and these engines really are duds  |
I am not a tuning guru by any stretch. I think you could get into the 13's with your setup, tho.
Still hoping you can find the performance you are looking for. Just got back from a drive in my bird, and the 350 runs hard. Keep at it!
I had the same question about your carb tuning. You are cammed up, and I can't imagine your idle vacuum is any better than 12-15" max. Hoping your power valve is matched. And your vacuum secondary out of the box settings likely don't match your engine. It has been years since I played with a Holley, so I will step aside on that adventure. Your timing sounds adequate.