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#1
04-06-2026, 09:39 PM
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New Top End on 400/406
Here are the details of the build using Butler Performance Ram Air Series cam - Roller 041
W72 988 block, .030 overbore for a 406 cubic inches, Stock crank, Eagle forged H-Beam connecting rods, Forged TRW pistons, Holley Brawler 750 Double Pumper, Port matched Edelbrock Performer RPM intake manifold, Edelbrock performer RPM 72cc Heads (Ported), 10:1 compression, Butler's Roller 041 Cam, 1.65 scorpion roller rockers, Comp Cam roller Evolution lifters, round port Doug's headers 1 7/8th primary and 3.5 inch collectors. Exhaust is 2.5 inch mandrel bent pipes with an H-pipe thru Texas T/A mufflers. Estimated numbers are 450HP and 480TQ. Some of you guys might remember this car. It use to have a performer intake manifold, 6x4 heads and the red headed step child cam in th name of the XE274H-10. Here is a video link to the new engine and the sound of that lovely lope from the RAIV cam. https://youtu.be/NGIfSMZC1T8 |
| The Following User Says Thank You to napster1 For This Useful Post: | ||
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#2
04-07-2026, 09:03 PM
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that sounds fantastic. surprisingly sounds really close to an original untouched ra4 car. beautiful car also.
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| The Following User Says Thank You to muscle_collector For This Useful Post: | ||
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#3
04-07-2026, 10:58 PM
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Weird. I had a post in this thread that just vanished.
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70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear https://youtube.com/shorts/gG15nb4FWeo?feature=share |
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#4
04-08-2026, 03:54 PM
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Quote:
Last edited by napster1; 04-08-2026 at 04:18 PM. |
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#5
04-08-2026, 03:57 PM
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Quote:
Last edited by napster1; 04-08-2026 at 04:14 PM. |
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#6
04-08-2026, 06:32 PM
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Sweet ride! Sounds awesome.
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| The Following User Says Thank You to Jay S For This Useful Post: | ||
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#7
04-08-2026, 09:15 PM
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Sounds awesome- what is idle rpm?
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Will Rivera '69 Firebird, 400/461, 290 Eddy D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears '69 LeMans Vert, XS 350, #47 heads, TH400, 10 Bolt 3.23 gears, work in progress ‘66 Lemans, 455, 310 KRE D-Ports, HR 236/245, TH400, GV OD, 12 bolt 3.73 gears - see it here: https://youtu.be/RP_s1wJKm_Y?si=K0NZxoTyaGcj8Dcb |
| The Following User Says Thank You to grivera For This Useful Post: | ||
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#8
04-09-2026, 03:42 PM
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Quote:
Quote:
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