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#1
02-12-2017, 11:18 AM
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Gaydosh build soon to be dynoed!
Jack Gaydosh just finished installing the E-heads and port matching the RPM intake. It will go on the dyno within a week or two using an 850 DP and headers. The detail of the combo is in my signature - compression is at about 10.41. Any guesses on HP and TQ?
 
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears ‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears '69 LeMans Vert, 350, #47 heads: work in progress Last edited by grivera; 02-12-2017 at 11:24 AM. |
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#2
02-12-2017, 11:43 AM
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We've built and dyno'd 455's quite a few with ported aluminum "D" ports and the larger Old Faithful cam, but not with the Stumpuller.
I'll still take a stab at it. It should make around 535hp and at least 575tq......Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#3
02-12-2017, 11:52 AM
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Quote:
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears ‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears '69 LeMans Vert, 350, #47 heads: work in progress |
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#4
02-12-2017, 11:58 AM
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Subscribe. Curious to see some numbers on the Eld-D port.
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Bull Nose Formula-461, 6x-4, Q-jet, HEI, TH400, 8.5 3.08, superslowjunk |
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#5
02-12-2017, 12:24 PM
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the FI and the long branch leaves a Q mark for me.Watching,Tom
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#6
02-12-2017, 12:43 PM
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It'll be dynoed with an 850 DP and headers. I realize that once it's in the car with FI and LB manifolds I will leave some ponies on the table...
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears ‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears '69 LeMans Vert, 350, #47 heads: work in progress Last edited by grivera; 02-12-2017 at 12:45 PM. Reason: Typo |
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#7
02-12-2017, 12:44 PM
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I just based the numbers on what we've done on the dyno we use. Another dyno may be more generous.
With 260cfm aluminum "D" ports and 230/236 cam (not the SP) we saw 514hp/567tq. With 295cfm aluminum "D" ports and 236/245/112 OF cam 552hp/604tq. So it should fall somewhere in between those two builds if on the same dyno we use, but for sure there are a lot of variable and the heads are Edelbrock, we used KRE heads for the ones we've done here.......Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#8
02-12-2017, 01:11 PM
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Quote:
Do you think there would be a difference on the same engine if it had 290 cfm "E" heads or 290 cfm KRE heads? Stan
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Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
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#9
02-12-2017, 01:48 PM
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487HP/561 Ft. Lbs.
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Paul Carter Carter Cryogenics www.cartercryo.com 520-409-7236 Koerner Racing Engines You killed it, We build it! 520-294-5758 64 GTO, under re-construction, 412 CID, also under construction. 87 S-10 Pickup, 321,000 miles 99Monte Carlo, 293,000 miles 86 Bronco, 218,000 miles |
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#10
02-12-2017, 02:06 PM
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495/550
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
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#11
02-12-2017, 02:20 PM
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Mine with 295 KRE d-ports and Stump puller Made 512 hp and 572 tq with the over sized RARE LB in place. Car is almost too tame. Idles at 600 with 15" vacc.
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Who cares about the horsepower wars, Indians win the torque wars. Roger |
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#12
02-12-2017, 04:13 PM
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I certainly hope it makes at least 514hp as we made that with unported KRE aluminum "D" ports at about the same compression, and a custom ground HR cam with 230/242/112 specs.
We've also built several with flat cams that had 230 @ ,050" duration and all made between 494 and 505hp also using unported 85cc KRE aluminum "D" ports......Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#13
02-13-2017, 10:40 AM
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Quote:
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#14
02-12-2017, 04:37 PM
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I'm interested in this build too...wanna see some goooood numbers for ya Will
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 1973 Firebird Navajo Orange w/shaker,1973 400/461,1972 Intake SD CNC'd,1977 Q-Jet 800 CFM w/ Cliffs Kit,Tanks Inc PA4 255 Walbro intank pump ,-8an feed/return,RobbMc Regulator,RobbMc 40 micron filter,253 CFM 6x-8's w/H.S 1:5 Roller Rockers,SD Stump Puller H/R Cam 230/236 @.050 112 lobe separation 565/.570 lift,Crower Solid Rollers,28150 Hedman Headers,3" exhaust,full tailpipes,350 Turbo,9.5" 3200 Converter,3:42 gear,8.5 posi,C/E slide-alinks,Koni adj frt shocks,Best 12.18@110.55 Lookin for 11's
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#15
02-12-2017, 05:17 PM
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ed as well. Similar build....
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1972 LeMans 461 stroker 10.3:1 Edelbrock D ports Scorpion 1.5 rockers Comp Cams "Stump Puller" roller Holley Ultra Street Avenger 770 Ram Air III exhaust manifolds 2.5" pipes Dynomax VT w/crossover Edelbrock Performer RPM TH350 2.78:1 10 bolt |
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#16
02-12-2017, 06:42 PM
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Me as well. Also interested in the tune specs of the carb as I will be running an 850 Demon.
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Frank M. 75 Firebird 68 Firebird 400 RAIII 66 Chevy II 461 Pontiac in AZ |
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#17
02-12-2017, 07:34 PM
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My 310 E heads made about 625 hp with a solid roller. When I installed the Old Faithful, HP dropped to about 550. More air flow capability anywhere alone wont make more HP. If it does, it was the weak link. My opinion is that with the stump puller you won't make any more HP then you would with the out of the box heads. The stump puller will be the weak link.
I would be very surprised if you hit 520. My guess is that you'll see 515 hp and start dropping of at 5800 rpm. |
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#18
02-12-2017, 08:10 PM
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I'm guessing 525/575. I know the heads are overkill for the cam but the cost to get the porting upfront was a no brainer should I want to upgrade the cam later.
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears ‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears '69 LeMans Vert, 350, #47 heads: work in progress |
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#19
02-12-2017, 08:12 PM
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Guess it depends on the dyno, and dyno software used too. The Depac that I am used to generally gives lower numbers than Superflow, and DTS dyno's do.
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Paul Carter Carter Cryogenics www.cartercryo.com 520-409-7236 Koerner Racing Engines You killed it, We build it! 520-294-5758 64 GTO, under re-construction, 412 CID, also under construction. 87 S-10 Pickup, 321,000 miles 99Monte Carlo, 293,000 miles 86 Bronco, 218,000 miles |
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#20
02-12-2017, 08:28 PM
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Unported KRE heads here & "041" type cam...
http://www.pontiacstreetperformance....d455MikeG.html (dyno sheet attached within link ) 502 hp at 5300 rpm. Generous dyno according to some. .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE Last edited by Steve C.; 02-12-2017 at 08:47 PM. |
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