cam for turbo 200

[66Sprint6]

I really want to change out the cam in my 200 but I am going to turbo it prolly next winter. Is there a good cam that I should look to get that will make things more enjoyable while Im runnin NA and then will be awesome for the turbo, or should I stick with the stock cam and go from there? Let me know guys, also lookin at roller tip rockers etc. Any help would be appreciated!
Matt

 

[xctasy]

Don't worry about the cam unless its a big one. What works for a normally aspirated carby engine will work for a turbo up untill about 270 degrees. After that, a street engine can run into compatiablity problems. If its an all out race engine, you can taylor the turbo to suit most cams. 300 durations have been used. But on a streeter, you have to ensure there isn't too much.

Any reputable cam under or around 270 degrees, at lash, should be fine. Apparently, keeping the degrees of overlap to a minimum level when both valves are just opening is important.

Can't help much more without waffling a bib full mate. David Vizards book on hot SOHC 2000 cc Pinto engines with John Flyns legandary 10 second 400 hp Ford covers a huge amount of issues with carburetor turbos

 

[addo]

Go the full roller rockers if you can afford to. What a young lad like you will do with a buzzy motor makes them a better choice. :roll:

 

[66Sprint6]

I will definitely try to get into some rollers before I go turbo. It is on my "To Do" list, lol. Anything else that might be benificial that I havnt already done (look below) before I go turbo? I am going to have to skip out on pistons etc, I will leave the block relatively stock and use small amounts of boost until I can afford to get better pistons etc.
Matt

 

[XFlow_Fairlane]

I would keep a spare set of cast pistons on hand incase you eat one every month or two. and a set of rings for them and maybe a cheapy hone. and gaskets


nick

 

[66Sprint6]

That sounds like a good idea, but will I really be eating too many of them up at only 7-10 psi? I really dont know, but I might have to keep that in mind!!!
Matt

 

[BB6Mustang]

A guy on the yahoo! 'jyturbo' list (Mike Sitar) ran cast pistons in his TT 351W (http://www.toohighpsi.com/BudgetTT/BudgetTT.htm). He managed to run high 11s @115+ mph in the 1/4 mile on 10 psi in an engine that breathes far better than any 200. He finally cracked a piston at 12 psi. I doubt you burn any pistons with 7-10 psi on an engine that breathes as poorly as the 200.

Remember that it isn't the boost pressure that makes power, but the actual amount of air that you get into the engine. For the same amount of boost an engine with less intake restriction will get more air into the engine and make more power. And vice-versa, an engine with a higher intake restriction will need more boost pressure to get the same amout of air in as the better breathing engine.