kickflip300punk

I need some advice on building a 400 sm blk. i wanna know what modifications i should do to this motor to get the most power for a good price. i hope hearing other people thoughts and advice- Bill

demon9766

Well anyway it depends on what you want to use it for.If u want to race it or use it for a daily driver. If you want to race it I would punch it 30 to 40 over get a good head job with port and polish,a solid lift cam with 525 to 630 lift forged pistons,rods,and crank. A good ignition system and a 750 carb with a good intake but make sure that cam , heads,intake and toque converter work in the same RPM range.Well it goes on and on but thats the way i would start.

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This is what 500 plus hp looks like.CNC ported AFRHEADS WITH 2.02 INT 1.60EXH,210 intake runners 74cc chambers, 750 speed demon carb,weiand intake,comp cams 292 with .501/.501 lift ,4340 forged crank,eagle H-beam rods duroshield bearings,KB forged 10 1/2:1 pistons,headers with 1 3/4 primaries ,MSD 6AL,comp cams pro mag1.6 rockers,holley blue pro-series pumps,MSD billet distributor.All stuffed into a 355.[img][/img]

TRACYCULBERSON

[quote=demon9766]Well anyway it depends on what you want to use it for.If u want to race it or use it for a daily driver. If you want to race it I would punch it 30 to 40 over get a good head job with port and polish,a solid lift cam with 525 to 630 lift forged pistons,rods,and crank. A good ignition system and a 750 carb with a good intake but make sure that cam , heads,intake and toque converter work in the same RPM range.Well it goes on and on but thats the way i would start.[/
here is what i done 2 my 400,bored 30 over so you will come out with 406ci. called ultradine cams ,they ground me a cam for my set up.
a hydralic cam . i personally would not go solid or roller unless u plan on running dirt track or something.i have 520 th lift but i pit 1.6 rockers instead of 1.52 and this gave a little more lift very crisp and fast chirp.
the duration is were u can fkkkkk up u mneed somewhere in the area of 290 or so keep under 300.a b&m super hole shot converter 3500 stall
also comp cams make a 1.6 roller tip rocker arm this is a wonderful set.
trw 4 eyebrowed pistons they are forged, use your stock rods no need
to spen money on of that.if you can find a set 441 OR 462 cast iron heads they work great port and polish. 2.02 ,1.6,elderbrock rpm performer intake it may range something like 1500 to 6500 thats good. a predetor carb works well or 750 dbbl pumper will moan.go to local prt store and get vaccum advance kit,this WILL get U running stout.i put this simular combo in 1980 malibu classic with a monte carlo rear end 373gears.the 1st time out at the strip she ran 7.56 et guys thats smoking on street tires. i am useD just a stock dist,all but the curve kit .headman headers flow master single chamber straight out the muff no tail pipe loose hp with tail pipe. my dist is just a stock electronic ignition.

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