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#1
10-23-2019, 09:08 PM
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Break-in
Thought I’d post a vid of breaK-in..... on to the track!
https://share.icloud.com/photos/0T47...AlrCI6A#Venice
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#2
10-24-2019, 12:40 PM
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I like the video. May I ask the numbers and the CID?
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#3
10-24-2019, 01:29 PM
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Sure....Made 555/577....462ci
no tuning other than setting lash and timing,...qjet, rpm(no spacer), HR with solid lifters....wasn’t really trying for any power numbers....breaking it in and checking for leaks. Frankly, it was Too damn hot to be on the dyno.!....dyno room was just put together so no A/f , carb hat...etc...etc...etc It’s running, I’m excited!!!!!....smooth running as well!
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#4
10-24-2019, 01:34 PM
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What cam do you run? Great numbers, seems like the spread between Hp and torque is narrow.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
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#5
10-24-2019, 01:37 PM
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Road paver with 4/7 swap
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#6
10-24-2019, 01:51 PM
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Sounds good..I bet it was hot in the dyno room. What heads? That 4/7 swap would get me every time putting the plug wires back on!
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 466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
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#7
10-24-2019, 01:57 PM
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Great numbers. Edelbrock heads?
The cam you used is bigger than the one in my 496. Might have been close to the 550HP if I used that. Jim |
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#8
10-24-2019, 02:00 PM
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Kre 295 heads....
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#9
10-24-2019, 02:04 PM
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Quote:
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#10
10-24-2019, 02:38 PM
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What's the Road Pavers 0.050 lift numbers? I presently run a SR , but thinking about something more street friendly with less spring pressures
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#11
10-24-2019, 02:47 PM
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Quote:
__________________
71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#12
10-24-2019, 04:38 PM
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Keep in mind Comp lobe 3115 is rated in the catalog with 244 degrees. But if ordered with a "B" suffix code (3115B) as the Road Paver from Dave Bisschop it can come ground with 246 degrees. And if you use solid roller lifters on a hydraulic roller lobe it alters the actual duration with the valve lash. This lash effectively reduces cam duration, especially at low lift off the valve seat. And in doing so tight lash must be maintained, or you can start to damage parts. You have to stay on top of that lash religiously.
.
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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.; 10-24-2019 at 05:07 PM. |
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#13
10-24-2019, 06:52 PM
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I ordered my RP with B3123/B3116 lobes, 246°/252° at 0.050" with 0.400"lobes on a 112° LSA.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
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#14
10-24-2019, 07:01 PM
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Nice numbers, am very interested to see what it does at the track.
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71 Goatman Hot Rods & Horsepower.......A diease for which there is no cure. 71 GTO, 463, SD 295 d-port heads, 10.75:1, RPM intake, 502hp/560tq @ the crank, 200r4, 10" Continental convertor, Bullet 234/244 cam, Cliff's Q-Jet, 3:42's w/Eaton True Trac, 5 Power Tours. New performance numbers coming 
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#15
10-24-2019, 07:09 PM
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Quote:
Looks like you’re running the same combo as I?.......you run yours yet?
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#16
10-24-2019, 07:15 PM
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Lobe 3123 is on page 18 here:
https://www.compcams.com/lobe-catalog In the past lobe 3115 has been used with 244 as indicated in the catalog and ordered as 3115B it has come ground with 246 degrees. Brand & part no.: Comp cams ~ SD performance custom Grind & lobe no.: Magnum lobes # 3115B ~ #3116B Tappet type: Hydraulic Roller Spec = intake/exhaust: (notes) Adv.dur. = 306°/314° (I/E split = 8°) (Adv.dur. rated @ .006") Dur. @ .050" = 246°/252° (I/E split = 6°) Dur. @ .200"= 164°/169° (I/E split = 5°) Lobe lift = .400" Lift @ 1.5 rr. = .600"/.600" LSA = 112° ICL = 108° ECL = 116° Advertised/seat events: IO = 45° BTDC IC = 81° ABDC EO = 93° BBDC EC = 41° ATDC Total OL = 86° .050" events: IO = 15° BTDC IC = 51° ABDC EO = 62° BBDC EC = 10° ATDC OL @ .050" = 25° .
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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.; 10-24-2019 at 07:21 PM. |
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#17
10-24-2019, 07:21 PM
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Mines a 246/252..... not the 244/252 I said earlier
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#18
10-24-2019, 07:39 PM
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Quote:
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Karl 
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#19
10-24-2019, 08:45 PM
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Again, it's the roller cam suffix code.
IF the lobe number is ordered with a "B" after it then with a Pontiac journal diameter the amount of duration can, but not always, have two extra degrees of duration. 244 to 246 ! Page 3 here: https://www.compcams.com/lobe-catalog .
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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 |
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#20
10-24-2019, 09:00 PM
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A fwiw. I'm not disputing anyone's cam duration here. Just providing a explanation as to why they SOMETIMES differ than the catalog listed duration on some custom roller cams.
Note Ray Klemm's cam here: Comp Cams hydraulic roller Duration at 0.050 246/252-deg Duration Advertised 306/314-deg Lift With Specified Rocker Arms 0.600/0.600-in Lobe Separation Angle 112-deg https://www.hotrod.com/articles/hppp...9-pontiac-gto/ It was ordered with lobe number 3115B on the intake. In the catalog lobe 3315 at that time was listed with 244 degrees.
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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.; 10-24-2019 at 09:45 PM. |
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