I see you put in a little work on the cutlass and it's looking good, if you could put some pics up of your a/c brackets and bolts so I can put mine on my car I am having trouble with it thanks. Check out my build. viewtopic.php?f=24&t=32114
307 to 403 Olds swap...info please?
- Thread starter 81X11
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two90west said:
Will get some pics tomorrow. I used all the 307's brackets and bolts on the 350, with the exception of getting an a/c rear mount bracket off a '79 Toronado, which didn't have a smog pump. I didn't want to see an empty bracket on the new engine since I'm not running the smog pump. Just looks cleaner. Other than not having the smog pump area, the mount was the same as the 307's.
Good luck with your project!
-Mike
Took the car to the Cedar Park cruise-in tonight (pics in the Events section) and the gauge never got hot, stayed around 180-205.....good deal! Guess it just has some air in the system that had to work itself out. Will check the level tomorrow.
Car is running GREAT! I can't believe Olds never offered the 350 in these....307's were junk....this has SO much more power and since you don't have to floor it to make it go, I bet the mileage is ok too! We'll see!
-Mike
Car is running GREAT! I can't believe Olds never offered the 350 in these....307's were junk....this has SO much more power and since you don't have to floor it to make it go, I bet the mileage is ok too! We'll see!
-Mike
81X11 said:
Good to hear. I'm telling you though, you gotta bump that timing way up assuming you are in fact only running 28*. If you think it's good now just wait until it gets some more timing advance. Should be a noticable difference everywhere from idle to redline.
From what I have seen/read/heard, the older, higher compression SBO's were set initially at 8-10 degrees at warm idle (550-650), in gear.... Later, lower comp SBO's w/ HEI's were set at 16-18 degrees at warm idle, in gear.....setting the timing on a high comp engine too far advanced WILL produce detonation (often silent!) during light throttle applications and create harder starting, especially when you factor in the ported vacuum advance (as high as 20+ degrees!) that HEI's produce which higher compression engines were never meant to use. Using an HEI set up on a older motor has definate benefits...but it does require some thought. The higher compression means higher octane fuel is normally required, larger spark plug gap, HEI wires, and some adjustments to the vacuum advance to achieve the correct tune at all rpm/load ranges. ... two centsIntragration said:
If you're not running an EGR valve, then the stock HEI's vacuum advance will usually be too high. You can get ones with less advance, though you'll have to do soe research to find out which ones you could use, but then you can always get an aftermarket adjustable one too.
DoubleV said:
I'm liking this debate. I put an aftermarket disto in there, and it's adjustable. No EGR. For sure a '71 motor built as far as I can tell to stock specs. Set at 12...when warm. This is what the 1971 book calls for. Idle is still a tad low, but no pinging, and starts easy, even hot.
Still need to get some pics of the front of the engine....sorry for the delay!
-Mike
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