The longer the stroke, the greater the torque assumingly produced in the low rpm area. Does anyone know if the 400 has a better pull than a 460? Or, does the 460's bigger bore compensate for the stroke? I want an engine that's going to pull from a dead stop. My father-in-law said he noticed his 429 did not pull like the 400 he swapped out his truck. The 429 was also hopped up some compared to the fairly stock 400. The 460 I know has a longer stroke than the 429 and may be different.I am considering taking the 400M out my truck and put in my mustang. The 400 wins the Jenny craig award weight wise. Especially, if I opt for aluminum heads.I assume also with some crank lightening with the already lighter 400 crank, it would out rev that 72 lb 460 crank and rotatating assembly. Especially with an underdrive crank pulley.


"D"

 

>The longer the stroke, the greater the torque assumingly
>produced in the low rpm area. Does anyone know if the 400
>has a better pull than a 460? Or, does the 460's bigger bore
>compensate for the stroke? I want an engine that's going to
>pull from a dead stop. My father-in-law said he noticed his
>429 did not pull like the 400 he swapped out his truck. The
>429 was also hopped up some compared to the fairly stock
>400. The 460 I know has a longer stroke than the 429 and may
>be different.I am considering taking the 400M out my truck
>and put in my mustang. The 400 wins the Jenny craig award
>weight wise. Especially, if I opt for aluminum heads.I
>assume also with some crank lightening with the already
>lighter 400 crank, it would out rev that 72 lb 460 crank and
>rotatating assembly. Especially with an underdrive crank
>pulley.

A 400 with the right cam will put down a lot of torque at very low RPMs, somewhere around 400+ # at 2000 RPM, obviously depending upon the cam. The 429 has a relatively short stroke at 3.55", the 460 has a 3.85" stroke while the 400 has 4.0" so it's not surprising that the 429 didn't pull like the 400 especially if it had a higher RPM cam in it. I'd be interested to know what type of aluminum heads you plan to put on the 400 since AFAIK the only aluminum Cleveland heads are very expen$ive pieces from either ARAO (4 valves per cylinder) or PIM.

 

[updated:LAST EDITED ON 01-17-03 AT 01:05 PM (EST)]Although I would like to run the better canted valve setup with big valves, I'm going to sacrifice that setup and run an inline SBF head.I'm going to change the pistons so the reliefs matchup with that type head. I am going to make a sheetmetal tubular style tunnel ram with sbf intake bolt pattern with 400 intake measurements. The Trickflow sbf head has 205CC intake runners. The tubes on the intake will be matched to those intake ports or maybe a little bigger. I'll run a tube across the intake for the rear water crossover. Nothing fancy. I'm going to weld in injector bungs and use a 302 fuel rail for the efi. The upper intake will have to be deep enough for me to side mount an 86 mm throttle body. I think I need it to be 6". However, the complete intake itself will be rather short to help hood clearance. Or, I'll just paint it and let it peak through the hood like the old shaker scoops on the earlier mustangs.
If I could find a good head porter with Cleveland heads, I would just run ported 2V's and raise the exhaust ports also.

"D"

 

Everybody needs to do their own thing, so I won't try to talk you out of it. You have your work cut out for you, keep us posted. Is a rear water crossover passage needed?