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Originally Posted by Got the Bug
Hey Jim,
I decided to go with Reno Engine & Drivetrain for the install. The Roush 402SR is a carberated version of the 402R. I'm far from an expert, but it's my understanding that the SR version (someone said that it stands for "street rod") is designed to deliver higher torque earlier in the RPM range.
You pay a BIG price in overall HP at the high end, but supposedly the engine is much happier at idle and at lower revs. My goal was ultimate driveability + some get up and go...still has 425HP which should do the job  .
I found some info on the web that shows the differences between the 402R, 402SR, 427R, and 427SR.
402SR Aluminum 425 HP
402R Aluminum 515 HP
427SR Aluminum 450 HP
427R Aluminum 550 HP
I just put my deposit down last week and can't wait for delivery!! |
Got the Bug,
I also went with the Roush 402SR but with the twisted wedge cam. It tops at about 500/500 but the torque comes in sooner, 469 ft at 2900 RPM. I contacted Roush and they sent me a dyno sheet so I could see what the numbers were. I don’t want a carb so I went with the Mass-Flo fuel injection system. I think the fuel injection will be a lot better for drivability, the Mass-Flo system looks like a carb system and all the feedback I have gotten has been positive. Reno Engine and Drive line is doing my install also. The car should be delivered to Reno next week, after a little detour. I will be auto-crossing with mine so I want the torque for getting out of the corners. Good luck with your car.
Ken