Re: are BB #516 good for performance?
[Re: B1MAXX]
#3230792
05/03/24 10:15 AM
05/03/24 10:15 AM
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Joined: Jan 2004
Posts: 8,341 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,341
fredericksburg,va
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i agree with the area under lift with 30 degree but I don't think they seal as well as a 45. I would just stay with a 45. my 2 cents. A race engine only. I’d never do that on the street.
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Re: are BB #516 good for performance?
[Re: cudaman1969]
#3230805
05/03/24 11:05 AM
05/03/24 11:05 AM
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Joined: Jan 2003
Posts: 13,385 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,385
Marion, South Carolina [><]
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For what it cost me to have some basic machine work done on a pair of 915s last year, I'd say it's only worth it to fix iron heads if you can do some of the work yourself. I had the heads shaved (just a light cleanup cut), 16 bronze guide liners, 8 hardened exhaust seats, opened up for 2.14"/1.81" valves, and a 3 angle valve job. That was a little over $700. I did the bowl porting, general port cleanup, cut the guides for positive style seals, assembled the heads w/ new valves, springs, retainers, locks. Just the parts will run you another $600+ depending on what you need.
A decent port job will be in the $1000 ballpark or so I'd say? I'm definitely no Dwayne Porter, so blending the bowls is about as much as I do. Then again, I'm not expecting 700 hp out of these heads either, lol.
Granted, a lot of aluminum heads (not all) need to be torn apart and checked out before using them, so the new cost needs that added to the bottom line. The cheap heads have cheap parts installed in them which are a gamble.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: are BB #516 good for performance?
[Re: cudaman1969]
#3230813
05/03/24 12:41 PM
05/03/24 12:41 PM
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Joined: Dec 2021
Posts: 1,166 Loudoun County, VA
Brad_Haak
super stock
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super stock
Joined: Dec 2021
Posts: 1,166
Loudoun County, VA
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i agree with the area under lift with 30 degree but I don't think they seal as well as a 45. I would just stay with a 45. my 2 cents. A race engine only. I’d never do that on the street. Pontiac used a lot of 30* intake seats in their street cars way back when, so I don't view that as a "race only" thing
2021 Challenger 6.4L Scat Pack 1320 100% stock: 1.680, 11.894 at 113.75 (DA 175 ft) weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008] pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: are BB #516 good for performance?
[Re: Brad_Haak]
#3230842
05/03/24 04:57 PM
05/03/24 04:57 PM
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Joined: May 2005
Posts: 2,007 Apollo, PA.
B1MAXX
top fuel
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top fuel
Joined: May 2005
Posts: 2,007
Apollo, PA.
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i agree with the area under lift with 30 degree but I don't think they seal as well as a 45. I would just stay with a 45. my 2 cents. A race engine only. I’d never do that on the street. Pontiac used a lot of 30* intake seats in their street cars way back when, so I don't view that as a "race only" thing The AMC did also but I'm telling ya they don't seal to well. Some even mod the valve with a conformation groove in the valve face
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Re: are BB #516 good for performance?
[Re: Cab_Burge]
#3230953
05/04/24 09:49 AM
05/04/24 09:49 AM
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Joined: Jan 2004
Posts: 8,341 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,341
fredericksburg,va
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“My message is sale them old 516 rascal and buy a new set of better aluminum heads with bigger valves and better ports up scope work twocents“
Exactly what we’re not allowed to do, rules, has to be the 1.60 ex valve, no port work. I don’t think I’ve seen an open chamber aluminum head, all closed chamber, quench is nice. I’ll do the work so no money just time.
Last edited by cudaman1969; 05/04/24 09:49 AM.
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