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#1
03-08-2018, 03:04 PM
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How much torque and hp will it make?
466 .020 over 73 455 block, 6X -8 well ported heads (285 cfm int), 2.11/1.77, milled .060", 9.3:1 compression, flat top piston, solid flat tappet 250/260 duration @ .050", 110 lobe sep, 1.65 roller rockers, 4.250" stroke, 6.800" rod, cleaned up Perf RPM intake, 1" plastic open spacer, out of the box 950 HP Ultra carb, 2" pri GTO headers 3.5" flat collectors, 18" extensions.
How much muscle? Will it have obnoxious idle characteristics at 1000 rpm? Subjective I know, but thought I would get opinions.
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Jim www.raceV8s.com 1972 Trans Am drag car, 3300lbs, 468 ci, Iron D ports, 428 block, 9799103 crank, 9.48 @ 143mph, 6.0 @ 114mph in the 1/8th. |
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#2
03-08-2018, 03:16 PM
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680 hp
625 tq
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It is easier to fool a man than it is to convince he has been fooled |
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#3
03-08-2018, 03:30 PM
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I ran a single pattern [email protected] 110 lsa 106 icl solid in a 400 and idle was right at about 850-900 rpm.... About 10" vacuum in gear with an 8" convertor. With your longer stroke I'd expect your cam to behave at least as nice.
Power... The dual plane intake is probably going to hold peak power down some... I'm thinking @575 hp 600 ft lbs. Personally I'd try a T2 or Victor or at least the equivalent of a well ported HSD. |
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#4
03-08-2018, 05:11 PM
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570 HP
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 Bob C.Quickest, Fastest, Best selling Pontiac Aftermarket Block IA II and Tiger Heads Boss Bird Funny Car Best pass to date 08/06/2016 [email protected] Allpontiac Big Chief Aluminum Engine Block http://www.AllPontiac.com |
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#5
03-08-2018, 05:14 PM
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I had a similar setup once butt the heads flowed 250's and about 1.5 higher compression than yours. Made like low to mid 500 hp range on the dyno if I remember right. That cam and rockers should make for a noticeable idle....even more so if you added some more compression. I used the T2 intake,,,,liked it very much,,,very responsive for a single plane.
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72 lemans,455 e-head, UD 255/263 solid flat,3.73 gears,,,10" 4400 converter,, 6.68 at 101.8 mph,,1.44 60 ft.2007 (cam 271/278 roller)9"CC.4.11gear 6.41 at 106.32 mph 1.42 60 ft.(2009) SOLD,SOLD 1970 GTO 455 4 speed #matching,, 3.31 posi.Stock manifolds. # 64 heads.A factory mint tuquoise ,69' judge stripe car. 8.45 @ 88.1 mph on slippery street tires.Bad 2.19 60ft.Owned since 86' |
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#6
03-08-2018, 05:19 PM
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My numbers say 595 HP mostly because of the HP Holley Ultra Carb and the 285 cfm head flow.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#7
03-08-2018, 05:37 PM
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550hp, 572 tq.
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My Half AN Injun..... |
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#8
03-08-2018, 05:39 PM
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Choppy good sounding idle...
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My Half AN Injun..... |
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#9
03-08-2018, 06:27 PM
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520 @ 5900
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76 T/A 455, cnc chamber E heads,OF hyd roller ,yella terra shaft rockers 11.47 119 |
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#10
03-08-2018, 06:48 PM
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Jim , I put together a very similar combo for my son to drive in my car a few years back . Used a bunch of stuff laying around the garage . Used torker 2 with dominator adapter , solid flat tappet cam , shift at 5500 . Ran some 10.70s @123 weighing 3750 . Dusting it off and putting it in the T37 for this year . I figured it had to be 575 at least .
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 505 CID, 3560 lbs,Tiger heads, NA. [email protected] mph, 1.29 60', stock suspension |
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#11
03-08-2018, 06:51 PM
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Not positive about the HP, but 285cfm out of cavernous 6X-8 D ports. That is not easy, good job my man.
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#12
03-08-2018, 07:08 PM
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582 HP, will be a beast in a street car.
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1969 Firebird, Tx3-455/468 machined by CVMS E-heads by Dave Wilcox/Comp Cams 300B-6 flat solid 850DP on E-85 by Eric Niefert/T2 1" plastic spacer T-400/PTC 4000/390's/30x9 Hoosier radial slicks,#3400 1.38 60' 6.32 @ 108 MPH at Northeast Dragway NC 5/23/15 (9th pass on new engine) https://m.youtube.com/watch?v=ePCu2v...ature=youtu.be 1.37 60' 6.26 @ 109 half track, 9.86 @ 136 1/4 mile, #3350 11/26/16 at Richmond Dragway (125th pass on new engine) |
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#13
03-08-2018, 08:38 PM
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585 HP.My 455 with 290 KREs at 10.25 CR,245-252@50 on a 110 600 lift with a factory dual plain and a 750AFB,2in headers made 550.More CI,more cam,bigger carb and better intake has to be worth at lease 35HP.Tom
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#14
03-08-2018, 09:35 PM
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603hp 558trq
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#15
03-08-2018, 10:36 PM
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Hey Jim
I’ll put in a WAG. With what you know with head porting, it’ll be a torque beast. 627 tq 581 hp Brian
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 Boobs & bacon 
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#16
03-08-2018, 11:07 PM
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Outtada box 950 carb may not idle unless there a hellava idle bleed air circuit.
My 9.0:1 will idle on modified Q-JET & 1050 2-circuit carb, but would not even fire with a Stock 68 Q-JET rebuild. You may want to try a known-capable low-compr low-vacuum carb on break-in. Once itsa idlng and all, 468 HP.
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95 Towncar that needs more TQ. Sold 2023: 12.24/111.6MPH/1.76 60'/28"/3.54:1/SP-TH400/469 R96A/236-244-112LC/1050&TorkerI//3850Lbs//15MPG/89oct Sold 2003: 12.00/112MPH/1.61 60'/26"x3.31:1/10"/469 #48/245-255-110LSA/Q-Jet-Torker/3650Lbs//18MPG 94oct Sold 1994: 11.00/123MPH/1.50 60'/29.5"x4.10:1/10"/469 #48/245-255-110LSA/Dual600s-Wenzler/3250Lbs//94oct |
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#17
03-09-2018, 12:11 AM
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580 HP @ 5600
630 TQ @ 4400
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www.hobracing.com |
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#18
03-09-2018, 01:46 PM
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Quote:
Brian
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Boobs & bacon
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#19
03-10-2018, 12:40 AM
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Quote:
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www.hobracing.com |
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#20
03-10-2018, 01:48 PM
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594 hp
621 tq This guy knows his way around an engine.
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 Mike McCarty You can drop the line, but you'll never kill the spirit!Pump gas 535 w/Marcella cv/1's. 11.0 compression, 4000 stall, 3.73 gears, 275 radial, to the axle exhaust, 3470# w/driver. 9.49 @ 140..........so far |
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