- Joined
- Aug 19, 2018
- Messages
- 40
- Reaction score
- 4
- Location
- Florida
- My Car
- 1973 Mach1 Q code 351 replaced with 1968 “429 thunder jet”
[url=https://ibb.co/dQW99z][img]https://preview.ibb.co/bEMnwe/Mach_1_front_side_up.jpg[/img][/url]
I threw a rod in my 1973 mach1. It had a. 68 429 thunderjet, I planned to go back to 351c it is a q code car, but I ended up with a 528 stroker. It makes 580hp 620 ft lbs so needed to rebuild the c6 as well. Problem is I can not get a good answer on torque converter selection. Car is street driven weekend car shows and the like with an occasional 300mile run on the freeway. Not a daily driver. Occasionally take to strip but street radials no trans brake or anything exotic. 4:11 gears solid roller cam
254/260 at 0.50 lift .671/.678 lift single plane manifold. Cam sheet specifies 3500 stall converter power band is 3200-7200 rpm for the cam. The valve train is good for 7500 but realistically I would seldom rev above 6000. My engine builder says 3500 stall but transmission guy says he would stay around 2400 for street- arguing that 1 the brakes would not hold to 3500 and 2 the flash stall on most converters is based on small block making 350-400 hp. Not a big stroker so the converter will actually stall higher then rated. Also do I need an anti ballooning plate? Although I understand the physics of a torque converter it still seems there is a dash of voodoo to it and getting it wrong either direction can cause problems. Any advice would be appreciated.
254/260 at 0.50 lift .671/.678 lift single plane manifold. Cam sheet specifies 3500 stall converter power band is 3200-7200 rpm for the cam. The valve train is good for 7500 but realistically I would seldom rev above 6000. My engine builder says 3500 stall but transmission guy says he would stay around 2400 for street- arguing that 1 the brakes would not hold to 3500 and 2 the flash stall on most converters is based on small block making 350-400 hp. Not a big stroker so the converter will actually stall higher then rated. Also do I need an anti ballooning plate? Although I understand the physics of a torque converter it still seems there is a dash of voodoo to it and getting it wrong either direction can cause problems. Any advice would be appreciated.