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I have gradually started to collect parts for an engine that I am hoping to build in the future. I am planning on putting this engine in my 71 Demon Super Street/ Hot Rod car. It is a 4 link back half car, 16 x 32 slick. It weighs just over 3000 lbs. My goal is to run 150 mph on the stop.

The hard parts that I have so far include a world aluminum 4.500 bore block. A set of B1 original heads, B1 intake, 1.8 Jesel intake rockers and 1.7 exhaust rockers, I also have some of the other required parts but nothing else that is important in the combination. My plan is to collect parts over the next few years so it is a clean canvas.

Head flow Numbers

lift int. ex.
.200 170 130
.300 257 178
.400 318 230
.500 359 273
.600 383 298
.700 405 311
.800 416 317

I have looked at all of the various strokes that are available and I was initially thinking about a 588 but I am now thinking about a 556 combination

I would accomplish this like this

10.720 Deck Height Block
4.500 Bore
4.375 Stroke
7.100 Rod
1.4325 Compression Height Piston (14:1 Compression)

Do you guys feel that this combo would accomplish my Goal??

Any real world experience would be welcomed. Also this is a combo that I have not seen too much of. Is there a reason or something that I am missing?

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150 is basically 9.0 ET... being that your wanting
to run a short stroke(now days thats short) you will
need to rev it... so a good high stall converter will
help it... but you will need ABOUT 800hp... yes that
combo should make 800hp with no issue if you rev it

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First off 150 on the STOP in S/ST is NOT a 9.0 you will need to be a good deal faster than that to carry 150 on the stop, even in great air. More like an 8.60. Not as easy to run that kind of MPH on the stop as it is off.

With you being 3000 you are going to need every bit of 1000hp to run 150 in good air consistently. We have a couple of fellow members running S/ST with B1 original deals, both cars run well in the 8's off the stop, one has yet to run 150mph and the other just made it in great air. Both cars IMO are over 950hp and I know one is at about your weight. There is also a member her with a car at 2800 with a big Predator(588 IIRC)that runs mid 150's. Running big MPH on the stop is not as easy as some folks seem to think for sure.

As for the combo. I am not a fan of the really big motors. I think everyone knows my junk is on the smallish side. I am also not sold on tall deck deals for various reasons either. But if ya wanna go big ya gotta go that way. Having said that it will take RPM to make that kind of power, the smaller the cubes the more RPM you will need to make the power. Just the way it is. Now that does not mean it cannot be reliable, IF you spend money on the right parts. i know of at least three cars out here that can all go 160 in S/ST. One is a 632, One is a 680"(car has run TS, SG, SC and S/ST and has a Wally in all), one is a 565 and the last one is a little ole 525

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I didnt catch the SST so yeah it needs I think closer
to 165mph or higher, so thats closer to a 8.30 or so
and that takes a little over 1000 hp... I dont see
it doing that unless he turns over 9000 rpm
EDIT
and thats at a better elevation

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I have stayed at my share of Holiday Inns and I am still waiting for something good to happen

How big is your motor?

My car also has a glide and I am shifting on time.

With regards to the greeney. My car picked up 2 full tenths and four mph when I switched from new car sent air y,fresheners to the little pine tree. I am convinced its the extra oxygen from the little tree. I think I am about 62 trees away from going 150.

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My motor is a 540" low deck. Don't know why Al says it's too big.
Maybe he thinks I have a 572".
My heads flow about what yours do. I have titanium valves too.
T&D rockers, aluminum rods..


Chris..