Stock 400 w/ nitrous

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Rice Killer · #1 Post by **Rice Killer** » Sun Jun 24, 2007 11:27 pm

Hey everyone this is my first post on this forum but I have been reading other posts for awhile.

How much power are stock 400 blocks good to? I have a 511 4 bolt (wish I had 509 2 bolt) which recently made 520hp 510tq on motor. I'm looking at getting a pretty basic plate system and would like to spray just a 150 shot. Would the stock block stand up to this? 6500rpm would be the max.

Thanks, great forum!
Andrew

ERV JR · #2 Post by **ERV JR** » Tue Jun 26, 2007 6:06 pm

YES THE FACTORY BLOCK WILL HOLD UP,, YOU ARE ASKING ABOUT THE BLOCK CORRECT ? AND NOT A WHOLE SHORT BLOCK THATS STOCK ?
I HAVE A FRIEND THAT IS RUNNING IN THE SAME CLASS I AM BUILDING FOR AND HE RAN A 9.06 WITH A FACTORY BLOCK IN A 3200 LB CAR
ALSO BOWTIE69 ON STEVES NOVA SITE, HAS RUN 14 TO 1 WITH THE UNIT SET PRETTY HARD WITH A FACTORY BLOCK

Rice Killer · #3 Post by **Rice Killer** » Tue Jun 26, 2007 8:33 pm

Yea i'm talking about the block. I'm thinkin a 150 shot should be the max because the mahle pistons are pretty light and my end gaps are set pretty tight.

aitch o · #4 Post by **aitch o** » Wed Jun 27, 2007 10:39 am

i ran a 509 factory block with splayed main caps and 1/2 filled with hard block.
it made 650 hp on the motor and i sprayed another 350 on the plate or fogger to it many times.
block worked fine. no core shift nor main web problems at all.

ERV JR · #5 Post by **ERV JR** » Wed Jun 27, 2007 10:45 am

any details on the motor you ran , was it a 23 deg motor ? 650 with a 350 shot is about were i should be whenever i get this thing done .

aitch o · #6 Post by **aitch o** » Wed Jun 27, 2007 4:20 pm

13:1 406 23 degree afr's, heavy porting, custom nitrous cam from cam motion.
4340 rotating assy. je nitrous pistons.
1150 holley, super victor.
650 hp is about the upper end of a non raised runner 23 degree without spending really exotic money on it.

what heads and intake are you planning to run?
are you planning to put splayed caps on the block, 1/2 fill with hard blok? i recommend both, even with some street driving.

ERV JR · #7 Post by **ERV JR** » Wed Jun 27, 2007 4:44 pm

I am going to be running the new afr 227 as soon as they are out i will have my pistons made, super victor with 4150 flange as per class rules,
a scat 4340 profiled crank, custom comp cam, splayed billet caps and fill to bottom of waterpump holes. What did your head flow if you dont mind my asking ?

ERV JR · #8 Post by **ERV JR** » Wed Jun 27, 2007 4:48 pm

oh how fast did the car run and how heavey was it, and what size tire ?

aitch o · #9 Post by **aitch o** » Thu Jun 28, 2007 2:32 pm

my afr's flow very good for a 23*, keeping the exact flow and cam numbers fairly tight . had them ported by mike at cfm performance. car ran 8.80s at 150s with a 28x10 tire at 3250#.
sounds like your combination is pretty similar and you are using as good of parts as i was.

ERV JR · #10 Post by **ERV JR** » Thu Jun 28, 2007 4:00 pm

WHAT KIND OF ROD DID YOU HAVE INT THE MOTOR ? I DECIDES TO RUN A STEEL ROD

aitch o · #11 Post by **aitch o** » Thu Jun 28, 2007 6:56 pm

plain steel eagle h beam 6". no problems.
a little heavier than billet alum but a chunk less expensive.

Mike Peters · #12 Post by **Mike Peters** » Fri Jun 29, 2007 6:42 am

ERV JR wrote:WHAT KIND OF ROD DID YOU HAVE INT THE MOTOR ? I DECIDES TO RUN A STEEL ROD

Before you put 6" rods in it, you should talk to your piston supplier about compression height if you're planning on spraying a 350 shot. From what I've been reading lately, the preferred rod length is a 5.85" or even a 5.7" to keep those rings away from the nitrous.

ERV JR · #13 Post by **ERV JR** » Fri Jun 29, 2007 1:07 pm

Yeah i already have gone over the idea and i made changes to the motor to get the desired distance down with the top ring. I was going to put about .050 stroke but the more i got into it i decided i didnt want to push the pin that high into the oil ring

Stock 400 w/ nitrous

Stock 400 w/ nitrous

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