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  #46 (permalink)  
Old 02-18-2010, 01:30 PM
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Quote:
Originally Posted by Landshark928
With out a power adder, your daily street driving will stink @700hp. Nitrous is nice since you only use it when needed. Driving a high HP car on the track is one thing. Trying to control it on twisting roads when a deer jumps out is a whole nother story. Nitrous lets you keep things sane for getting groceries but still be insane on track day. Plus nitrous can travel to your next car.

IMO Build a strong 450HP 383 with forged internals. Then hit it with the giggle gas. It'll cost 1/2 or less of a NA engine making the same power.

X2, although i dont like nitrous, this makes sense

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  #47 (permalink)  
Old 02-18-2010, 01:40 PM
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A 700 hp big block is a walk in the park, now. Easily obtainable from a 454/496 setup. Build a 500 hp 496, add some boost and you will be north of 700 hp before you know it.
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  #48 (permalink)  
Old 02-18-2010, 04:50 PM
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Quote:
Originally Posted by my87Z
no one ever said it wasn't possible, but that it was next to impossible with a stock block, and you have just proven the point that i tried to make earlier, that he just didn't know everything that his buddy had into his car.

i would personaly recomend a BBC as well, and since you want 700ish hp then you will need to go with a forged rotating assembly so why not go with a 489 or 496, one is .030 and the other is .060 (this will probably be the easiest stroker to make) i've seen 700hp run on a stock gm big block, but it will need clearenceing just like the 383 would, you will need to have a 454 block machined then get a 4.250 crank. it would be far easier to get the hp/tq number you are looking for, and possibly be able to run it on the street. now it would be safer to run a after market block like the DART big M for this but if you were to go that route i wouldn't shoot for the 489/496 i would have the bore cut to 4.500 and run either a 4.250 crank (540) or a 4.500 crank (572) it would cost a little more but the numbers you want to reach would be easy with these CID's and you could do it easily on pump gas you would also be able to match you tq to your hp like 700hp/700tq
I really don't wanna go the nitro way rather stick with either a 383 stroker or BBC...

I'm starting to lean towards the BBC idea, especially the 700hp/700tq sounds real nice , if i were to shy away from spending the couple grand on a dart BB, what size would you suggest, and what done to it in without putting it on the verge of imploding...
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  #49 (permalink)  
Old 02-18-2010, 05:39 PM
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a 502 with the lightest forged rotating assembly that can still go long term.
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Old 02-18-2010, 07:00 PM
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what about a tranny to go with it, I want this thing to snap so any suggestions... anyone have any experience with Doug Nashs?? i have a ford 9" laying around i'm going to get modified so thats taken care of.
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  #51 (permalink)  
Old 02-18-2010, 07:13 PM
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Quote:
Originally Posted by ap72
a 502 with the lightest forged rotating assembly that can still go long term.

X2
i like the 502 since it still uses the 4.00" crank, i would feel more comfortble running it higher in the rpms

a 502 is a mark-5 (gen V) or mark-6 (gen VI) truck block, they can be found in commercial vehicles from the late 80's to early 90's, i've heard different thing as far as which vehicles to find them in, the main one ive head of is school buses (blue bird) but i also know that some of these commercial vehicles came with a 366 bbc and a 427 bbc.

bore is 4.466
stroke is 4.00

these blocks are very popular for building the 540 as well
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Old 07-10-2012, 12:01 AM
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The 400 block is a good idea, I just wanted to build a 383, this is my first one. Am actually going to sell this motor or swap it for a 396 BBC and build it to work with a 8-71 blower I have been wanting to use. Plus it will be a little more old school that way.
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  #53 (permalink)  
Old 07-10-2012, 12:30 AM
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original 383 700 HP story

It seems this story has gone a little towards fantasy?Im lost as to what the real goal is.I hope that putting a 700 horse power engine into what sounds like a stock street car isnt really being considered?

The transmission and differential need to already be in place and suspension to control this beast. Putting a race engine in a stock car sounds dangerous.
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Old 07-10-2012, 12:47 AM
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Not a fantasy

I have this engine in my '57 3100 stepside. Truck is in beginning stages, still has drum brakes on it. Trans is a TH350 with manual valve body, 4800 stall converter and is tied to a Ford 9" rear end.

I am either going to convert the truck to run on E85 or am going to change it out for a 396 BBC with an 8-71 I have laying around.

To begin with I posted this motor build in response to an old post stating about 15:1 compression. The 383 motor is 15:1 not sure of HP haven't performed a dyno on it. But if it isn't 700 I can get it there and then some with a bottle which I have for this build.
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  #55 (permalink)  
Old 07-10-2012, 01:24 AM
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This thread is old so I will not spend much time reading any further as it just don't excite me that much. The only reason I even posted is it's late, I can't sleep and I am bored.

My opinion: Getting 700 hp out of a 23* headed motor is going to be a haiti of a chore.
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