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Old 12-23-2007, 09:03 PM
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400 sbc builds.

I got my 400 the other day. Trying to get a idea on what parts to use. What kind of builds do you use with your 400?

Looking to get around 350-400 hp/tq at least. My budget is about 3 thousand maybe more.

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Old 12-23-2007, 09:04 PM
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what do you want to do with it? what vehicle, gears tranny? octane?
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Old 12-23-2007, 09:33 PM
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Quote:
350-400 hp/tq at least. My budget is about 3 thousand maybe more
With a stocker type 400 you could run a dish (or flat top) hyper and about 218-228 dur and 450-480 lift on a 112 -114 and make tha powert with just about any old heads. Your desired goal for TQ is easily attainable. Are you buying a complete rotating assy? I don't assume you'll be racing this motor, just want something with big grunt. A set of cylinder heads with about 180-200cc runner would serve you well - even set of Summit ZZ5 VORTEC heads on a mild 400 ought to save you a few bucks and run like a raped ape. What type head are you planning to use? How about intake/carb? Will you be using a flat tappet cam?
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Old 12-23-2007, 09:39 PM
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what do you want to do with it? what vehicle, gears tranny? octane?
I want it to be a street motor to see the odd strip pass. Its going in a 1978 malibu.
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Old 12-23-2007, 10:19 PM
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you can do quite a bit with $3000. If you have committed to this amount have the block bored, line honed and decked.
Get a nice internal balance crank and dish top pistons. Decent aluminum heads can be found on ebay for $800 or less, a 185-200 cc runner will be ideal, I'd like the 200cc's personally. Air gap intake and a cam with around 235-240* @ 050 and as close to 500" lift as you can get with that duration. 2500 stall and it will make serious power. Basically what Stroke said
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Old 12-23-2007, 10:20 PM
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Thats for the help.
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Old 12-24-2007, 05:51 AM
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I agree but I would go for flat top pistons instead of dished. No need to give away compression. Pump gas will work close to/up to 11:1 cr. Especially if you go with aluminium heads.
A solid short block is always a good idea, but if your crank, flywheel, rods, etc etc are in good condition I wouldnīt bother converting to internal balance. Not for 350hp anyway.
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Old 12-24-2007, 07:12 AM
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Quote:
Originally Posted by Canadian78
I got my 400 the other day. Trying to get a idea on what parts to use. What kind of builds do you use with your 400?

Looking to get around 350-400 hp/tq at least. My budget is about 3 thousand maybe more.
I just finished a 406 build and to be honest i got the whole motor for 500 bucks last summer and it had all sorts of goodies in it.
heres what i got
Cola forged crank
titanium 5.7 rods
wisco forged pistons
Brodix SPEC heads
2.06 intake 1.60 valves (titanium)
Isky Racing Cams
Cam Style: Hydraulic roller tappet
Basic Operating RPM Range: 3,000-7,000
Intake Duration at 050 inch Lift: 238
Exhaust Duration at 050 inch Lift: 248
Duration at 050 inch Lift: 238 int./248 exh.
Advertised Intake Duration: 284
Advertised Exhaust Duration: 294
Advertised Duration: 284 int./294 exh.
Lobe Separation (degrees): 110
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Grind Number: RR-284/294
crane rev kit
1:5 ratio roller rockers on exhaust
1:6 ratio rollers on intake
super victor intake
AED 850 DP carb
(only thing I changed was the cam and rockers)
the motor was a backup IMOD motor.
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