Cam Suggestions??
#494066
10/11/09 02:04 PM
10/11/09 02:04 PM
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Joined: Mar 2008
Posts: 202 Barboursville, VA
belvedere383
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I am currently running a 496 low deck stroker in my 65 Belvedere, it runs 11.13 @ 125 in full street trim and with a 4 speed.
I was wondering if i could could a little better cam for my setup because it seems to lose power up top according to the dyno sheet, current setup:
4.25 Stroke 4.31 Bore Indy 440EZ heads hand ported, flow 354 @ .500 Indy Low Deck Single Plane 1050 Dominator 12.7 : 1 compression TTI 2 inch primary headers with no exhaust 4 speed with a 3.91 gear
Current cam is a comp solid roller with these specs:
.660 lift on the exhaust .655 on the intake 282 duration @ .050 on the exhaust 281 on th eintake 110 LSA and it is currently advanced 2 degrees and has been degreed for the motor.
65' Belvedere
496'' Stroker Indy Heads
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Re: Cam Suggestions??
[Re: belvedere383]
#494068
10/11/09 09:26 PM
10/11/09 09:26 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Posts: 52,972
Romeo MI
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I really dont think its your cam ... might be a fuel supply problem How many rev's do you turn
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Re: Cam Suggestions??
[Re: belvedere383]
#494070
10/11/09 10:28 PM
10/11/09 10:28 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Posts: 52,972
Romeo MI
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To me that cam should pull more rev than you take it to but its a little short on lift... but it pretty well matches your head flow.... have you checked your fuel volume (flow)
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Re: Cam Suggestions??
[Re: MR_P_BODY]
#494071
10/11/09 10:41 PM
10/11/09 10:41 PM
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Joined: Mar 2008
Posts: 202 Barboursville, VA
belvedere383
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i have not checked the fuel volume, but the motor is not starved for fuel, it run a very consistent color on the plugs and typically never had a problem running its best, it just seems on the dyno graph that it may be able to hold more power a little longer with a better cam combo.
65' Belvedere
496'' Stroker Indy Heads
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Re: Cam Suggestions??
[Re: mike s]
#494073
10/12/09 11:15 AM
10/12/09 11:15 AM
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Joined: Mar 2008
Posts: 202 Barboursville, VA
belvedere383
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to the best of my knowledge it goes thorugh the trap at around 6100, but i was thinking it could use a steeper gear, how much less duration would you think would suffice??
65' Belvedere
496'' Stroker Indy Heads
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Re: Cam Suggestions??
[Re: belvedere383]
#494074
10/12/09 12:56 PM
10/12/09 12:56 PM
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Joined: Jan 2003
Posts: 13,402 Marion, South Carolina [><]
an8sec70cuda
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I Live Here
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Marion, South Carolina [><]
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I have to agree with Mr P body on this one. Something is wrong with the car and it's not your cam. You made 572 hp at the wheels and it's only running 125 mph at the stripe? Something is holding it back...fuel system, weak ignition (good grounds?), clutch issues, etc. That's a lot of motor to be running those ET's and speeds. I'd go over the car real good and make it work with what you currently have before I tore into the engine looking for more power. CHIP
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Cam Suggestions??
[Re: an8sec70cuda]
#494075
10/12/09 04:08 PM
10/12/09 04:08 PM
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Joined: Mar 2008
Posts: 202 Barboursville, VA
belvedere383
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its full weight though and not a drag car. I drive it on the street.
The things you listed that would be holding it back have all been accounted for. It has a good ground it has a full MSD ignition, distributor, it has a sumped tank with an aeromotive 145gph pump -8 line all the way forward to a magnafuel regulator and a pretty decent 1050 dominator.
65' Belvedere
496'' Stroker Indy Heads
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Re: Cam Suggestions??
[Re: belvedere383]
#494076
10/12/09 04:16 PM
10/12/09 04:16 PM
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Joined: Jan 2003
Posts: 13,402 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
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Full weight street car or not, that car should be running mid 10s as it sits. Or atleast running more MPH than it is. I'd hate to see you tear into the motor and spend money only to find out that it doesn't help your situation. CHIP
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Cam Suggestions??
[Re: Thumperdart]
#494079
10/12/09 08:43 PM
10/12/09 08:43 PM
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Joined: Mar 2008
Posts: 202 Barboursville, VA
belvedere383
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it went 11.13, 11.14, and 11.15, then i launched and shifted the [Edited by Moparts - Family Friendly Site - Keep it clean] out of it and went 2 tenths faster through the 1/8 mile then as i shifted into 4th it slipped the clutch. Ended up going 11.14 at 118, and it normally traps 124-125 every time. So i think it has the potential to go 10's it just needs more tuning and some seat time, plus it was only a 1.67 short time.
65' Belvedere
496'' Stroker Indy Heads
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Re: Cam Suggestions??
[Re: belvedere383]
#494082
10/13/09 07:48 AM
10/13/09 07:48 AM
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Joined: Jan 2003
Posts: 13,402 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
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Do a compression test and also a leak down test on the motor to make sure you don't have any problems internally. Flow the fuel system to make sure it is flowing what it should. Double check ignition timing. etc. What's the elevation at your track? How's the air quality there? If the air down there is pretty bad then that may account for your times and MPH being slower than I think they should be. For comparison...I had a stock stroke .030" over 440 in my car, weighed in at 3700#, single dominator on a Team G intake, OUT OF THE BOX Indy SR heads, 262/268 at fifty solid roller, 14.5:1 compression...it was a street driven setup with mufflers on race gas. 727 w/ 5k stall, 4.10s and 28x10.5 DOT tires. Ran 10.40s at 129 mph. It may be a combination of bad air and the fact that your car is a 4 speed that's throwing me off. CHIP
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Cam Suggestions??
[Re: an8sec70cuda]
#494083
10/13/09 08:31 AM
10/13/09 08:31 AM
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Joined: Mar 2008
Posts: 202 Barboursville, VA
belvedere383
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The air quality up here in Ohio isnt too bad, its pretty mild and not too humid.
Your setup had almost a point more compression, and those SR's are a way better head than what i run. But still i agree with you that i should be close to 130 mph with this setup. I really think it could use a gear change and maybe some more timing. As of right now it will run 113 mph at limiter in 3rd and it will go through the 1/8 mile in third at only 102 so a steeper gear may do the trick. And also i only have the timing at 30 degrees total because i didnt know how far the 110 would allow for.
But i really appreciate all the info so keep it coming.
65' Belvedere
496'' Stroker Indy Heads
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Re: Cam Suggestions??
[Re: Hemiroid]
#494085
10/13/09 09:08 AM
10/13/09 09:08 AM
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Joined: Mar 2008
Posts: 202 Barboursville, VA
belvedere383
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i will probably do a compression test just to be sure and i may take it back to the dyno and try out some more timing.
65' Belvedere
496'' Stroker Indy Heads
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