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#1
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Cam degree question
I installed my comp roller a got From Kauffman yesterday and my Sims precision machine roller bearing timing chain installed straight up as a starting reference point. After I degree the setup it comes in at 108 on the centerline. Cam is ground on a 110, so it's been a number of years for me since I have done one, do I install the bottom gear -2 to get my 110? Thanks guys!
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1969 GTO street strip project 11.1 forged 461, highport heads 1995 Trans-am 420 ci sb 14:1 compression 9"ford 9.89@132 1.34 60ft SOLD! |
#2
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Honestly if you are at 108 I would try that. Chain will stretch some and lose a degree or 2 after some miles.
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66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
The Following User Says Thank You to Mike Davis For This Useful Post: | ||
#3
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So you don't think I would be losing any power with that cam timing? I'm running as cast high highports with around 11:01 compression in my 461
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1969 GTO street strip project 11.1 forged 461, highport heads 1995 Trans-am 420 ci sb 14:1 compression 9"ford 9.89@132 1.34 60ft SOLD! |
#4
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why call Kauffman and not do what they say? They do this every day!
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#5
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Emailed him, but that's besides the point. 108 is close, I could end up messing with the timing on this cam and end up below 106. Jeff said he would try to get closer to 106 and I may actually give that a shot but if it ends up much lower then 106 with the available slots I have in the timing gear I will just put it back at 108. He actually sent me this cam when I asked for a reccomendation and said nothing about setting it at 106. If he thought this combo should run a 106 not sure why he would reccomend the 110 to begin with.
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1969 GTO street strip project 11.1 forged 461, highport heads 1995 Trans-am 420 ci sb 14:1 compression 9"ford 9.89@132 1.34 60ft SOLD! |
#6
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Quote:
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#7
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Quote:
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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. |
#8
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Can you post a picture of the cam card?
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 |
#9
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Sure! I will post one when I get home in a couple hrs
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1969 GTO street strip project 11.1 forged 461, highport heads 1995 Trans-am 420 ci sb 14:1 compression 9"ford 9.89@132 1.34 60ft SOLD! |
#10
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Here it is. I'm running 1.65 rockers
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1969 GTO street strip project 11.1 forged 461, highport heads 1995 Trans-am 420 ci sb 14:1 compression 9"ford 9.89@132 1.34 60ft SOLD! |
#11
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Thanks for posting the cam card.
Sure wish Pastry Chef (Mike) was not suspended. He would be able to post up the actual lobe curves for these lobes. This would give us a better understanding of what advancing the cam and moving all 4 cam events would do. While advancing the cam does not change how much overlap the cam has it does change how the overlap will work. They are some on PY who like to degree the cam where the intake lifter raise is 0.030" higher than the exhaust ATDC. 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 |
#12
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Quote:
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1969 GTO street strip project 11.1 forged 461, highport heads 1995 Trans-am 420 ci sb 14:1 compression 9"ford 9.89@132 1.34 60ft SOLD! |
#13
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I would leave it at 108. With 304 deg of adv int duration, that's a lot. The intake valve will close late enough, even with 11 to 1 static..
Sent from my SM-T817V using Tapatalk |
#14
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Lots of opinions, but what about the original question?
We don't do a lot of cam degreeing, but would like to better understand the mechanics of what changes need to be made to move lobe timing. The OP probably would like to know, too. That's why he posted the question.
Would switching the bottom gear to the -2 mark move the cam from 108 to 110? Thanks. |
#15
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Quote:
__________________
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. |
#16
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You are fine, run it. My cam came in at 111, supposed to be 112.
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The Following User Says Thank You to Dragncar For This Useful Post: | ||
#17
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Well here in another wrench to throw into the gears. I emailed kauffman before I posted up here and he now suggests getting in closer to 106. What exactly would that do for my combination?
__________________
1969 GTO street strip project 11.1 forged 461, highport heads 1995 Trans-am 420 ci sb 14:1 compression 9"ford 9.89@132 1.34 60ft SOLD! |
#18
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What is the whole combo? 106 will give it more bottom end and have a narrower power band than a 108.
__________________
66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
#19
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Ok so it's in a 69 gto, all steel. 12 bolt with 3.73 gear, th400 with a continental 3800-4000 stall. Tire is a 295 65 15 Mt radial. Engine is a 461 with as cast highports, zero decked 11:01 compression with 1.65 ratio rockers.. I will be using a northwind intake with either a 950 hp or a 1050 dominator.
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1969 GTO street strip project 11.1 forged 461, highport heads 1995 Trans-am 420 ci sb 14:1 compression 9"ford 9.89@132 1.34 60ft SOLD! |
#20
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Should also add this is a matching numbers block with studded 2 bolt mains so I'm not planning on spinning this thing very high. I know I'm limited with my block hp wise.
__________________
1969 GTO street strip project 11.1 forged 461, highport heads 1995 Trans-am 420 ci sb 14:1 compression 9"ford 9.89@132 1.34 60ft SOLD! |
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