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11-15-2006, 07:56 PM
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CC Member
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Join Date: Jun 2006
Location: Calgary,
AB
Cobra Make, Engine: Butler Racing/427 side oiler
Posts: 371
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Not Ranked
Call me a dummy
Ok call me a dummy but whats the deal with High riser Med riser etc heads?
I have a 427 so and some (what look to be) stock heads...I think my bottle neck is the heads and intake ...I am running a holy street dominator i do believe as the intake with a holly 750 ..I am not very impressed with the heads or the intake? thoughts ? what are you 427 side oiler guys running for heads and intakes? I know broad question but any help is great
Thanks
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11-15-2006, 08:04 PM
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CC Member
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Join Date: Apr 1999
Location: cleveland,
OH
Cobra Make, Engine: CSX4000, 427
Posts: 1,999
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Not Ranked
OK, you're a dummy.
__________________
"After jumping into an early lead, Miles pitted for no reason. He let the entire field go by before re-entering the race. The crowd was jumping up and down as he stunned the Chevrolet drivers by easily passing the entire field to finish second behind MacDonald's other team Cobra. The Corvette people were completely demoralized."
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11-15-2006, 08:06 PM
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CC Member
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Join Date: Apr 1999
Location: cleveland,
OH
Cobra Make, Engine: CSX4000, 427
Posts: 1,999
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Not Ranked
Seriously, buy this book.
http://www.themotorbookstore.com/howtorebifoe.html
It has good descriptions of all the FE heads, except the SOHC. Tunnel ports flow the best of the original. Modern FE heads are based off of the MR and HR design, but with redesigned ports on some of the heads for better flow.
__________________
"After jumping into an early lead, Miles pitted for no reason. He let the entire field go by before re-entering the race. The crowd was jumping up and down as he stunned the Chevrolet drivers by easily passing the entire field to finish second behind MacDonald's other team Cobra. The Corvette people were completely demoralized."
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11-15-2006, 08:18 PM
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CC Member
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Join Date: Jun 2006
Location: Calgary,
AB
Cobra Make, Engine: Butler Racing/427 side oiler
Posts: 371
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Not Ranked
Thanks Alot
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11-15-2006, 08:23 PM
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CC Member
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Join Date: Oct 2006
Location: Houston,
TX
Cobra Make, Engine:
Posts: 52
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Not Ranked
I am in the process of assembling a 427 s.o. with Ford medium riser heads, Ford dual quad intake. From what I have gathered the set-up should be quite respectable (450+hp hopefully). Keith Craft is going to assemble for me and I will let you know.
I am going to use two 600cfm Holley's, solid lifters, stock LeMans connecting rods and the steel crank has been slightly modified to produce a longer stroke.
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11-15-2006, 10:07 PM
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Senior Club Cobra Member
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Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
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Not Ranked
Medium Riser heads are very respectable. High Riser heads are even better. Don't forget the Tunnel Ports either!
High Risers were outlawed by NASCAR in 1965 and were called the "Tall and Terrible" heads (tall BIG ports). I'm running a set of original 1964 Tall and Terribles on my side oiler (with dual four barrels no less).  |
11-16-2006, 03:21 PM
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CC Member
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Join Date: Jun 2006
Location: Calgary,
AB
Cobra Make, Engine: Butler Racing/427 side oiler
Posts: 371
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Not Ranked
How would one id the heads I am running now
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11-16-2006, 05:53 PM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
Find the casting numbers.
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11-16-2006, 11:51 PM
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CC Member
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Join Date: Jun 2003
Cobra Make, Engine: ERA 427 w/496 Side Oiler, roller, dual quads
Posts: 417
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Not Ranked
Quote:
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Originally Posted by Scufty
How would one id the heads I am running now
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The casting number is located between the middle two spark plugs and will read something like C5AE F.
Dan
__________________
Do you know why they call it "PMS"? Because "Mad Cow Disease" was taken. --Unknown, presumed deceased
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11-19-2006, 06:08 PM
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CC Member
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Join Date: Feb 2006
Location: Thousand Oaks,
CA
Cobra Make, Engine: Classic Roadster
Posts: 1,367
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Not Ranked
Carnut- Out of curiosity I looked at my casting number on a 390 fe. Number I found between two middle spark plugs reads...D2TEAA. Can you decifer for me please? Thanks.
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11-19-2006, 08:11 PM
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CC Member
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Join Date: Oct 2002
Location: Fairfield,
CT
Cobra Make, Engine: HM-2027 / 427 SO
Posts: 815
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Not Ranked
Quote:
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Originally Posted by MaSnaka
Carnut- Out of curiosity I looked at my casting number on a 390 fe. Number I found between two middle spark plugs reads...D2TEAA. Can you decifer for me please? Thanks.
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Those are 72 castings used on pickups. The "TE" denotes a truck part. However those heads are the same exact casting as the earlier C8-H's. The D2's also had induction hardened seats for unleaded.
G. |
11-19-2006, 08:36 PM
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CC Member
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Join Date: Oct 2006
Location: Yorba Linda,
ca
Cobra Make, Engine:
Posts: 254
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Not Ranked
By far the biggest limiting factor of the FE motor is cylinder head design. A few companies have figured out how to make them work - Edelbrock is one. If you need to stick to iron heads for authentic looks, you need to have bigger valves as well as porting to make them flow almost as well as a stock big-block Chevy. 
It gets expensive real quick to modify iron heads. Modern aluminum aftermarket heads are much more bang for the buck. Maybe paint the aluminum heads or something. |
11-19-2006, 11:27 PM
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Senior Club Cobra Member
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Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
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Not Ranked
I'm not sure Edelbrock has figured out FE heads. Out of the box there not that good. With some port work there MUCH better. But hey, if you gotta do port work to make them work, well, thats not exactly 'figured out'. |
11-20-2006, 12:04 AM
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CC Member
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Join Date: Jun 2003
Cobra Make, Engine: ERA 427 w/496 Side Oiler, roller, dual quads
Posts: 417
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Not Ranked
Quote:
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Originally Posted by MaSnaka
Carnut- Out of curiosity I looked at my casting number on a 390 fe. Number I found between two middle spark plugs reads...D2TEAA. Can you decifer for me please? Thanks.
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MaSnaka...lucky for you FFR428 decifered your heads, as he gave you more info than I coulda. 496fe is also right about installing larger valves...in a 390, have 428CJ valve sizes installed, or better yet, if you have the moola, would be Edelbrock heads. How fast do you want to go? How much money you got? 
Dan
__________________
Do you know why they call it "PMS"? Because "Mad Cow Disease" was taken. --Unknown, presumed deceased
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11-20-2006, 12:15 AM
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Senior Club Cobra Member
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Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
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Not Ranked
Is the BORE of a 390 same as the 428? The smaller bores limit valve size. For instance the 427 BLOCK itself is notched to accomodate bigger valves.
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11-20-2006, 12:30 AM
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CC Member
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Join Date: Jun 2003
Cobra Make, Engine: ERA 427 w/496 Side Oiler, roller, dual quads
Posts: 417
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Not Ranked
The 390 bore is smaller, but 428CJ sized valves fit without notching the bores.
Dan
__________________
Do you know why they call it "PMS"? Because "Mad Cow Disease" was taken. --Unknown, presumed deceased
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11-20-2006, 04:16 AM
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CC Member
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Join Date: Dec 2004
Location: Prince Frederick,
MD
Cobra Make, Engine: Unique 427 S/C 427 FE S.O. 484 cu in
Posts: 952
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Not Ranked
Tunnel Ports
Last edited by Naumoff; 11-20-2006 at 04:33 AM..
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11-20-2006, 04:22 AM
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CC Member
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Join Date: Dec 2004
Location: Prince Frederick,
MD
Cobra Make, Engine: Unique 427 S/C 427 FE S.O. 484 cu in
Posts: 952
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Not Ranked
Cubic Inch Displacement Chart
STROKE
Crank 3.30" 332
Crank 3.50" 352,361T
Crank 3.78" 390, 406, 427 391T
Crank 3.98" 410,428
4.00" (332-352 Block 332 / 352
4.05" (390-410 Block 390 / 410
4.13" (406-428 Block 406 (405) / 428 (427)
4.23" (427 Block 427 (425)
NOTE: Figures in parenthesis are "computed" displacements, Adjacent displacements are "rated".
Trying to fix it so it's easier to read
Last edited by Naumoff; 11-20-2006 at 04:34 AM..
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11-20-2006, 04:44 AM
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CC Member
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Join Date: Apr 1999
Location: cleveland,
OH
Cobra Make, Engine: CSX4000, 427
Posts: 1,999
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Not Ranked
Quote:
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Originally Posted by Naumoff
Cubic Inch Displacement Chart
STROKE
Crank 3.78" 390, 406, 427 391T
4.23" (427 Block 427 (425)
NOTE: Figures in parenthesis are "computed" displacements, Adjacent displacements are "rated".
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I think the bore on a 427 is 4.233, so displacement comes out to 426.
__________________
"After jumping into an early lead, Miles pitted for no reason. He let the entire field go by before re-entering the race. The crowd was jumping up and down as he stunned the Chevrolet drivers by easily passing the entire field to finish second behind MacDonald's other team Cobra. The Corvette people were completely demoralized."
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11-20-2006, 04:51 AM
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CC Member
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Join Date: Dec 2004
Location: Prince Frederick,
MD
Cobra Make, Engine: Unique 427 S/C 427 FE S.O. 484 cu in
Posts: 952
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Not Ranked
Quote:
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Originally Posted by Anthony
I think the bore on a 427 is 4.233, so displacement comes out to 426.
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