Amrish

Anyone her eabout this?? it in one of the recent hotrod magazines, right on the cover.

Anyone know how much it would gofor, or any websites i can find it at??

If i wanted a whole new engine with just about everything new and a new tranny and new rear end, should i expect up to 15 grand??

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1992 z28 25th Anniversary
All black w/ z28 wing
Flowmaster Exhaust
350 TPI

Kat

iTrader: (4)

Actually I dont think that it is a Chevy block. From my understanding it is Olds rocket block. Reason being that it has a taller deck and the cam is set higher in the block than a Chevy and that the 427 big blok crank can clear the cam.

Or I can be totally wrong and it might just be a 400 SBC bored over or a Bowtie block punched out and stroked

Kat

RB83L69

BTDT. If you take a 400 block and put a 4" stroke crank in it, you come out with a 427. The one I did was .030" over so it became a 434.

Don't know what they did in the article or what they built their motor out of. I don't pay much attention to magazines, I'm more of a "doer" not a "mag article reader" or a "speculator" or "guesser" about what might or might not be.

There's one or 2 other people on this BBS that also have some experience in this matter.

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"So many Mustangs, so little time..."
ICON Motorsports

jcb999

http://www.theengineshop.com

Apeiron

It's a World Products 400 block.

AlkyIROC

They've taken that block or a bowtie block out to 454 but you can't do it with a factory 400 production block. Even the 434 kits are not designed for a long life street engine.

A factory block usually has a maximum or 413 or something like that.

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87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

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Monty

As mentioned already, that motor is based off of a World Products Motown block. World must be paying some big bucks, cause it's been in all the magazines the past couple fo months, sometimes more than once in the same mag.

Their motors appear to be a pretty good bargain for what you get. I wouldn't put it in a racecar, but it wouldn't be a bad street car.

I understand World's reasoning, but I think they made some compromises. Dart makes the Rocket Block for GM, and has had similar blocks for years, dubbed the Iron Eagle. They are available in 350 or 400 main sizes, standard 9.325". 9.325", or even 9.500" (only in aluminum blocks though) deck heights,as well a small block, big block and 50mm roller bering cam bearings. They do have raised cams and spread pan rails though (.800", .400" each side).

World over exagerates things I think. You can get a timing chain from Cloyes for a raised cam block for about $10 more than a standard timing chain. A standard timing cover fits the raised cam block. Your oil pan choices are limited, but there are options available for elss than $200. With a tall deck, you will need a special intake manifold, since the cylinder heads are effectively spread further apart, but Dart and Edlebrock offer manifolds for around $250. So total, you're talking about $200-300 more in additional costs incurred by using a tall-deck block.

However, the benefits outweight the costs in my opinion, especially if you're really going to build a killer motor. First of all, with a 4.0" stroke, with a standard deck, you have to run shorter rods, and end up with a crappy rod/stroke ratio. With the tall deck, you can run longer rods and maintain a decent rod/stroke ratio. I used 6.125" rods and with a 4.0" stroke, ended up with a 1.53 rod/stroke ratio. Compare this to a standard 5.7" rodded 383 that has a 1.52 rod/stroke ratio. I'm not going to get into whether or not a higher rod/stroke ratio affects power, but it does affect cylinder wall side thrust loading, which affects cylinder wall wear.

Also, with a standard cam location and a 4.0" stroke, you're almost definitely going to have to run a small base circle cam.

With the option of using BBC sized cam bearings, you can run a bigger cam. Consider that if you build a SBC 427, you're in big block territory. You'll need as much intake/exhaust flow as you can get with all those cubes. With the lobes on the cam I used, I wouldn't have even been able to install the cam with SBC sized cam bearings. The lobes are bigger than SBC cam bearings, so I had to use BBC cam bearings. It also adds strength an stability to the cam/valvetrain.

The larger 400 sized mains also add strength to the crank. The Dart and Rocket blocks feature billet steel, splayed 4 bolt main caps. I know what World says about using their nodular iron caps. Whatever...

My SBC 427 made 650 hp on the dyno(6700 rpm), and 500+ ft lbs from 3000-7000 rpm, peaking at 580 @ 5100 rpm. The rotating assembly, as well as the valve train is easily capable og 8500+rpm, but since it's a street engine, we set the SpeedPro to limit rpm to 7000rpm. Just added insurance. The engine idles smoothly at 850 rpm, and pulls 12" of vacuum at idle.

With the right parts, you can build a motor that is totally streetable and beats those World crate engines.

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1982 Corvette Tremec TKO
<A HREF="http://www.geocities.com/monty_williams/434specifications.html" TARGET=_blank>SBC 427 650hp/580tq
</A>

BadSS

I've had very good luck with production 2 bolt 406 blocks with main studs. You can spend a little or a lot depending on how strong you NEED or WANT the botton end (short block) to be. A stock 406 2 bolt block (good core and properly prepared), APR main studs, stock 3.75 crank, "O" or "X" factory 5.7" rods w/ ARP bolts, and Forged pistons is sleep at night safe for under 700 horses as long as you keep the revs under 6500 rpm. I've built a number of 500 - 550 horse engines spraying the house down with no problems. I'm even running a 2 bolt production 406 block with my current combination that peaked the dyno at 614HP @ 6400 RPM / 567TQ @ 5000 RPM. I also run double stack nitrous kits (250HP & 350HP) and do hit both kits when I "need to". I did however, move up to a 4340 crank and rods and "nitrous" pistons for added sleep comfort. Hoping not to jinx myself,, but until a production block cracks or seperates on me,,, I just can't see spending $2000 plus on a block and related equipment.

However,, I agree with Monty,, if you are going the aftermarket block route,,, I also say go with the raised deck height blocks. Much more value for the dollar in my opinion also.

Vader

There are several 426 SBC kits out there for anyone with a checkbook.

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Later,
Vader
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"Let the bodies hit the floor!"
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