Drag Racing Discussions > Front Engine Dragsters
which direction to go with FED
Dolmetsch:
"Don tell me more about the 300 new to me been a v8 man need direction but not a high dollar piece!"
About three ways to build them low budget which is what my career was (going fast on less).
First real inexpensive is a 300 block bored .050 using 390 Ford for pistons. You get a bump in compression a gain in cubes BUT the piston weight and pin size is EXACTLY the same. A good flat tappet cam of around .570" lift and 268@050 (solid) or .545 253 @ .050" hydraulic will give you a decent engine that will not kill itself.
The head needs Chevy 2.02 intakes and 1.60 exhausts. (If the ex seats are pounded go to the 1.65 exhausts) Port the head BUT do not do much on the low side floor where it turns into the valve pocket. there is water too close there for anything more then a quick rub. Use 7/16 screw in studs in place of the stock press ins. (3/8s will become a trouble source to bypass them. ) Use the BB chevy rockers . Cut spring pockets for dual springs to mtch the cam. Use a four barrel intake and size carb like it was a V8 (If each cyl is 300/6 =50 cubes then a V8 would be 400 cubes) which using Don's Law requires 400 double = 800 cfm.
Headers should be 38 to 42 inch primary same size as the exhaust valve.
The other two use different pistons. You can use 302 chevy pistons (69 Z28) but they have almost too much compression or have custom ones made by Ross etc. Use a good quality head gasket.
This will get you down the track in fine style for a long time. Dont be afraid of the 390 pistons . You wont ever break them . Use good rod bolts. Engine will turn close to or just to 6000 in the traps.
Don
Blind Mule:
Dom thanks I appreciate the info ;) why does the 302 piston give too much compression I run all my cars on alky this one will be a drunk too ;D I know that a 240 head is what is recomended but with decking or the 390 pistons what compression would it have? I don't have a head you know wher I might locate one I have the shortblock? Thanks again! If you would rather private message me that's ok!
Randy!
wideopen231:
--- Quote from: 225digger on May 16, 2013, 05:57:08 AM ---
--- Quote from: wideopen231 on May 15, 2013, 01:02:21 PM ---All right I feel like the little kid of the class now at a young whipper snapper age of 47. woo hoo.
--- End quote ---
i didnt have much time to read the posts over morning breakfeast but will come later today when im not busy and reply better ....... but i did see this while skimming ........ im 31 .... im the kid of the class ....
--- End quote ---
Well that means Bill has underwear 1 1/2 times as old as you.
afaulk:
8)I'm thinking we need to take up a collection and get some folks new underwear!
BCCOWANWEELS:
JUST DO BOTH,WHY NOT ?
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