thanks for this... that’s massively helpful, the car looks like it performs and sounds really good in the video.. and I’m still pretty keen on getting that setup .Well lets talk about the performer RPM top end kit I have been running for 20 years on a 351W, taking kids to ball games, driving around town sitting in traffic in the bay area, boulder colorado mountain thrashing and upstate new york country roads. I run several autocrosses a year and every few years I'll hit a track or two.This engine has been on Sears point , Laguna Seca, Thunderhill and Watkins Glen international all multiple times. Never had a valve spring issue BUT I chip at 6k to keep it whole. If you want to run to 7k, I would do some research. For instance, a trip to THunderhill, in the California Central Valley, 2 hour drive there, beat the daylights out of teh car all day in 100 degree afternoon heat, 1.5 hours home then 1 hour in bay area stop n go traffic to get to my home. This is a VERY Streetable system. SO first things first, the idle, this video gives a taste of the idle in the very beginning, its quite appropriate for a respectable mid-life-crisis ;o):
What I like about the system is you get a nice broad range of punch. You can get more HP out of a 351 but the power range tends to shrink and move upwards in the RPM range, my first engine was like that doggy at 2500 starts coming at 3500 neck snap at 5500. Felt doggy at street RPMs. For the street you want good low-end punch because any time you hit the throttle say to change lanes without a downshift, she will step out on you and "feel fast". My first motor would likely beat my existing motor on a drag strip but not on an autocross.
So I say, you can't go wrong with the RPM system with some nice shorty headers and a 600-650 carb which will give nice midrange throttle response.
SO that's my pitch, I've run this car for over 20 years with this system, its bullet proof and has never left me wanting for more and all components are matched right out of the box. Not saying you can't do better, but you can do a lot worse playing catalog poker.
Don't forget you have to divot the pistons with valve relief if you go 202 valves. Otherwise, if you are building the motor get the right pistons with valve relief.
I’m heading down to my local engine shop this week to pick up the bits of the bottom end and the cam .. so will see what they say also .
this is really helpful as I’m sure 10.1would be a sweet compression ratio to run, I shall look into the heads with a bigger cc as the performer rpms only have 60cc ... what would this mean for the compression ?If you get heads with 64cc combustion chambers and flat top pistons with valve reliefs, your compression ratio ratio will a little above 10:1.
ahh cheers man but I’m in England. So the shipping would be terribleWhere are you located? I have a very nice rotating assembly for a 351w posted in the for sale section. I am in Ohio.