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Old 04-14-2011, 05:57 PM   #1
Datsun
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Default 500ci build, Big Chiefs or DRCE?

Planning a new engine build and am indecisive on head selection. This is more of a "wannabe" prostock engine build I'm just tinkering around with, I don't think I need DRCE style heads for the application but maybe I do. I want to make a lot of power (though no particular goal), turn some decent RPM's, but don't want to get too crazy with the cam and valvetrain necessary to turn 10,000+ rpm. I don't want to change valve springs all the time. A realistic peak rpm/hp goal for me is at 9000rpm. Bore size will be around 4.6+. I guess my main question for the head guys is how much power advantage am I really looking at stepping up to a DRCE head vs. a well designed/ported 18* (or less) big chief head if all I want to turn it is 9000rpm? Engine will be ran on gasoline, have sheetmetal intake and 2 dominators, 15-16:1 compression, dry sump, yada yada. Curtis or others, what would your recommendation be? Thanks in advance...

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Old 04-14-2011, 06:36 PM   #2
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Default Re: 500ci build, Big Chiefs or DRCE?

RFD / Dart 11* head is about as close to a DRCE as you can get in a Big Chief style head, valve angle / location etc, ..
2.52 x 1.82 valves, .. can make a fairly bad ass 500" project. The ports in my cnc are based off of 2006/2007 DRCE prostock stuff.

DRCE is a bunch more money, .. mostly because of all the other machine work and processing to get the castings in running order.

If this was an all out, comp eliminator, puller or something where you need every last little bit, then DRCE.

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Old 04-14-2011, 07:00 PM   #3
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Default Re: 500ci build, Big Chiefs or DRCE?

Curtis, exactly what I needed to hear. When I'm ready to pull the trigger on this project I will be getting in contact with you for the heads. Thanks
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Old 04-14-2011, 07:04 PM   #4
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Default Re: 500ci build, Big Chiefs or DRCE?

I have a Big Chief 18* headed 500" Oldsmobile that turns 9000.. Makes pretty descent power.. It's a Rodeck (SP) with 4.600" Bore and 3.750" stroke, 9.500" Deck I believe..
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Old 04-14-2011, 09:58 PM   #5
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Default Re: 500ci build, Big Chiefs or DRCE?

Do you already have bottom end parts?

Are you sold on staying GM?

Dollar for dollar...the Hemi 99 market is crazy soft right now...
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Old 04-14-2011, 11:06 PM   #6
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Default Re: 500ci build, Big Chiefs or DRCE?

A few years ago I ran a DRCE2 block with olds 14 degree CFE big chiefs at 500 cubic inches. Fairly mild cam (less than 900 lift), spun it just over 9000 rpms and it made over 1200 hp NA. Valve train geometry was a bit screwy and finding head gaskets was a bitch, but it was a very stout motor.
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Old 04-15-2011, 10:28 AM   #7
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Default Re: 500ci build, Big Chiefs or DRCE?

pm outlawbill on here hes running a prostock style motor i believe with drce's
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Old 04-15-2011, 12:11 PM   #8
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Default Re: 500ci build, Big Chiefs or DRCE?

Acutally its a DRCE 2 block and E-460 heads, but its a messed up cluster now. I'm waiting to see if the heads are fixable/usable or junk for my use. Its called if the heads can't be used, then I need to switch to DRCE 2 heads.................which means machining another block.
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Old 04-15-2011, 12:46 PM   #9
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Default Re: 500ci build, Big Chiefs or DRCE?

I've got a complete (pan to manifold -- just freshened) late 90's "vintage" 499 ci DRCE just looking for a new home -- one of pawuk's old pieces.....................you won't need to engineer a thing its done.
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Old 04-15-2011, 02:02 PM   #10
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Default Re: 500ci build, Big Chiefs or DRCE?

buy CFEs all you need
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Old 04-16-2011, 10:35 AM   #11
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Default Re: 500ci build, Big Chiefs or DRCE?

Ok so nobody did, so I will, WHY???

I too have an old. 10,000 RPM 498 inch Pro Stock motor from the late 90's the year the "big" teams went to 4.9 bore spacing. I did it for the Hp to $$$ ratio and it was good for me. BUT most classes hit the heads with weight and you can get "REALLY" close with a set of conventional heads from Curtis or Slick Rick to name a few.

Not sure if I would go this way again if I was doing it over. I think I would use as much of the Pro Stock stuff as I could, but with a "conventional" (if there really is such a thing) heads and a sheetmetal and run from there.

Now if your looking at staying with that style, I think I would go with the 10/11 deg. CFE/Dart castings as they seem to be the power kings. The 12 deg. Raptors are a good head as well. Not sure how much savings $$$ wise these are over the DRCE stuff, but I know there is a lot of used stuff out there and that's not always the case with DRCE I, II, III.
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Old 04-16-2011, 01:02 PM   #12
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Default Re: 500ci build, Big Chiefs or DRCE?

Quote:
Originally Posted by Datsun View Post
Curtis, exactly what I needed to hear. When I'm ready to pull the trigger on this project I will be getting in contact with you for the heads. Thanks
Good luck with that.
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Old 04-16-2011, 08:03 PM   #13
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Default Re: 500ci build, Big Chiefs or DRCE?

Datsun,
Are you limited to 500cid ? How much HP are you looking to make,How fast do you want to go ?
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