Wow, to receive a response from Joe Sherman himself
....holy crap, I'm overwhelmed. For a small town rural Canadian fellow like myself struggling to get together the money to just go racing this board is an absolutely amazing opportunity to bounce questions off the best of the best.
Ahem...=shaking my head= back to subject...
It sounds like the 1 3/4" headers are the way for me to go. Thanks everyone.
I have no problems with putting a larger cam in the engine, but the cam grind used in the article concerned me with valvetrain life......I do not know how long it will last, but the shaft mount rockers should help keep things under control. If this means I have to do a valvespring swap every year, then I can live with that....The car will see likely no more than 25,000 kms per year. However, if a larger cam means I need to replace valves, lifters, pushrods or rockers on a yearly basis, then it is too much cam I think for my purposes. Like I said in the original post, this is my first attempt to build this level of power.
I noticed the article uses a 383, and the 195cc eliminator AFR's. Where I am using the eliminator 210's on 406ci. I wonder what sort of 'street manners' that cam would give? I am not looking for a car to commute through rush hour traffic or anything, but I would like to have the car not fall flat on its face or stall when trying to leave from an idle. I have no experience running a cam that size on the street, so if you have any input as to what I can expect.....that would be great. My opinion of streetable is quite loose....if I can drive it as my secondary 'play' vehicle which will only occasionally get stuck in mild traffic and spend most of its life in 80kph or higher zones....I can live with that. With the torque converter locked up and in overdrive, I will be likely spinning close to 2500-2800rpm down the highway here. I suspect poor combustion due to low velocity and fuel separation will not be a problem at that range (2500-2800), but what about extended idling (say 15-25 mins) would this cause the engine to load up with such a large cam?
I saw in the article that you used split 1.6 intake and 1.5 exhaust rockers and that you had to machine the heads an extra 0.1" deep to accomodate the springs....will the machining be necessary on my 210's as well?? They are good for .660 lift from AFR.
The cams specs from the article are as follows for those who have not seen it: comp cams 12-860-9, adv. 287/296, 0.050 259/264, lift .645/.630 and 106 lobe sep. with 1.6's
Again, I am in awe of the talent on this board...