Spark plugs in aluminum heads

[chimp koose]

I am really wanting to use the quadrajet as the small primaries will make it a nice responsive driver . As such I am limited to the eddy performer intake as nobody makes an air gap type for quadrajet using vortec style heads . The 700 r4 is essentially a t350 with overdrive if i am correct. I was hoping to use one in place of the t350 later when I get this car running and sorted out . That is also a reason why I wanted a qjet as it gets into the main metering circuit much earlier in rpm than a square bore holley style due to the smaller primaries . My thinking is that if the rpm drop into OD goes low enough , the larger primaries in the holley style carb may not be operating in the main metering circuit and still be in the off idle circuit nixing the possible fuel economy gain . I have also set up my fuel tanks in a way that switching to efi should not be a problem or require reworking the tanks if I decide to go that way later on.What is your engine going into ?

[phat46]

I am really wanting to use the quadrajet as the small primaries will make it a nice responsive driver . As such I am limited to the eddy performer intake as nobody makes an air gap type for quadrajet using vortec style heads . The 700 r4 is essentially a t350 with overdrive if i am correct. I was hoping to use one in place of the t350 later when I get this car running and sorted out . That is also a reason why I wanted a qjet as it gets into the main metering circuit much earlier in rpm than a square bore holley style due to the smaller primaries . My thinking is that if the rpm drop into OD goes low enough , the larger primaries in the holley style carb may not be operating in the main metering circuit and still be in the off idle circuit nixing the possible fuel economy gain . I have also set up my fuel tanks in a way that switching to efi should not be a problem or require reworking the tanks if I decide to go that way later on.What is your engine going into ?

The 700r4 has a deeper 1st gear, 3.06, than the T 350 at 2.52. I always thought that would let you get away with a taller rear gear plus the OD would make it great at highway speeds.  This will be going into my '46 Chevy coupe, that I've had since about '91. It has a basically stock 350, with way too much cam, in it now with a T 350. Weighs around 3600lbs. I recently got acquainted with some local guys that build cars like we see on the Street Outlaw type shows, one has actually been on the show racing against the 405 guys. One guy is building a 90ish Camero with a 427LSX engine with twin turbos, for the street! He's shooting for 1400 h.p. He has arranged a shootout for local cars at a nearby dragstrip, with several of these cars, grudge races, and a run what ya brung category just to see what your car will do. I want to take mine and see what it will do, hoping for low 13's maybe into the 12's ? 😃

[chimp koose]

Did not know about the first gear in the 700r4 being that steep ! My car will be around 2500 lbs.  8" locker w/3:89 gears and 31" tire. I am thinking 12's . Do not want to make much more power or the rear end will be the weak link. I will likely go to a smaller dia tire for the drag strip and I also have a nitrous kit but probably only for about a 50 horse shot in high gear if I stick with the taller tires .

[Charlie Chops 1940]

(quote)The 700r4 has a deeper 1st gear, 3.06, than the T 350 at 2.52. I always thought that would let you get away with a taller rear gear plus the OD would make it great at highway speeds.  This will be going into my '46 Chevy coupe, that I've had since about '91. It has a basically stock 350, with way too much cam, in it now with a T 350. Weighs around 3600lbs. I recently got acquainted with some local guys that build cars like we see on the Street Outlaw type shows, one has actually been on the show racing against the 405 guys. One guy is building a 90ish Camero with a 427LSX engine with twin turbos, for the street! He's shooting for 1400 h.p. He has arranged a shootout for local cars at a nearby dragstrip, with several of these cars, grudge races, and a run what ya brung category just to see what your car will do. I want to take mine and see what it will do, hoping for low 13's maybe into the 12's ? 😃[/quote]

I always figured that my '40 convert weighed 3700 pounds or so. I had occasion to four corner scale it this fall and was surprised it weighed in at 3322. 50.12%  front  and 18.01% rear. That is the scale's computer calculations. I was surprised at the weight distribution. Explains why it handles as good as it does.

[enjenjo]

50.12% front and 18.01% rear.

So what holds up the other 31.77%?