what cam are you running in your RB stroker
#1703426
11/26/14 11:32 AM
11/26/14 11:32 AM
|
Joined: Oct 2009
Posts: 217 Owosso, Michigan
stateroadhog
OP
enthusiast
|
OP
enthusiast
Joined: Oct 2009
Posts: 217
Owosso, Michigan
|
493 stroker, stealth aluminumn heads, 10.8 to 1 comp.,195 cylinder pressure, 3.54 gears, 4-speed, MP ignition, six pack intake, 1-7/8 headers Anyone with similar set up would like to know what Cam your running, and gear ratio. Not happy with my choice XE274H-10. Hydraulic or solid.
|
|
|
Re: what cam are you running in your RB stroker
[Re: stateroadhog]
#1703430
11/26/14 12:02 PM
11/26/14 12:02 PM
|
Joined: Jan 2007
Posts: 1,444 NEW JERSEY
dynamite
pro stock
|
pro stock
Joined: Jan 2007
Posts: 1,444
NEW JERSEY
|
I have near the same motor set up as you, 493,sidewinder heads, 10.5 comp,with the performer RPM intake and 850 Holley.. 3:55 gears, T/F trans..I had Tim at Bullet cams grind me a hyd roller ,,has 530- 530 lift,don't remember the rest as I'm at work ..LOL and don't have the specs with me..great street and strip cam.. just right for me..3600 + lbs ,with a terrible 1.7 60 ft I ran 11.47 @ 119 mph.with tons of torque I just lit the tires up. Then drove home. I need better tires.That cam I had made for a buddy in flat tappet hyd,, with about same specs was much cheaper and works well !!!
Last edited by dynamite; 11/26/14 12:05 PM.
|
|
|
Re: what cam are you running in your RB stroker
[Re: dynamite]
#1703433
11/26/14 03:18 PM
11/26/14 03:18 PM
|
Joined: Oct 2003
Posts: 4,013 South Park, Pa.
68LAR
master
|
master
Joined: Oct 2003
Posts: 4,013
South Park, Pa.
|
Quote:
12 * initial, all in by 2600 rpm to 38-40 + on 100 octane, down to 36 on pump gas...on my home 4 wheel scales about 3630 lbs . then add my 200 plus lbs ,.so around 3850 lbs on the start...and the old 56 is about as aerodynamic as a brick..so I'm happy..
Ya. I've found out that on my engine and a few of my friends engines, that having the distributor set up with a light spring on the centrifigal weights to keep them closed while starting and going full out at around 1100 rpm to 35*, that it really wakes the engine up. Like I said, this is how I have mine set up and the car will break the tires loose at will. My car is 3726# with a half tank of gas. Plus my 200# in the seat and you are close to 2 tons. The car sixty's in the low 1.5 range pulling the tires slightly on pump gas (93 octane), yet is fully streetable.
4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight
|
|
|
Re: what cam are you running in your RB stroker
[Re: stateroadhog]
#1703435
11/26/14 04:07 PM
11/26/14 04:07 PM
|
Joined: Feb 2005
Posts: 4,324 Prospect, PA
BSB67
master
|
master
Joined: Feb 2005
Posts: 4,324
Prospect, PA
|
Quote:
Hard to spin tires without reving high and dumping clutch shift into second and it won't break them loose. Just thought should have more torque. Have rechecked opening and closing timing and everthing is happening when it should.
Seems odd. How did you come to the conclusion that the cam is the problem?
What is the gear ratio, car weight, and tire used?
|
|
|
Re: what cam are you running in your RB stroker
[Re: 68LAR]
#1703436
11/26/14 04:10 PM
11/26/14 04:10 PM
|
Joined: Jan 2003
Posts: 4,760 Moved to N.E. Tennessee
GomangoCuda
master
|
master
Joined: Jan 2003
Posts: 4,760
Moved to N.E. Tennessee
|
Quote:
Quote:
12 * initial, all in by 2600 rpm to 38-40 + on 100 octane, down to 36 on pump gas...on my home 4 wheel scales about 3630 lbs . then add my 200 plus lbs ,.so around 3850 lbs on the start...and the old 56 is about as aerodynamic as a brick..so I'm happy..
Ya. I've found out that on my engine and a few of my friends engines, that having the distributor set up with a light spring on the centrifigal weights to keep them closed while starting and going full out at around 1100 rpm to 35*, that it really wakes the engine up. Like I said, this is how I have mine set up and the car will break the tires loose at will. My car is 3726# with a half tank of gas. Plus my 200# in the seat and you are close to 2 tons. The car sixty's in the low 1.5 range pulling the tires slightly on pump gas (93 octane), yet is fully streetable.
12 initial is not going to work well especially with a 6pk. You could try 18-20 initial just to see if it helps your bottom end (it will) then shorten the curve to get your desired total. Or you can try to set it up like Lar's. Mine has been set like he describes forever but I don't have 195 PSI of cranking pressure and I do have more gear (4.30)than you.
Also, are you sure the outer carbs are opening? If the vacuum hoses are hooked up to the wrong port the outers won't open properly if at all.
In theory, there is no difference between theory and practice. In practice, there is.
|
|
|
Re: what cam are you running in your RB stroker
[Re: stateroadhog]
#1703437
11/26/14 04:16 PM
11/26/14 04:16 PM
|
Joined: Aug 2003
Posts: 43,317 Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,317
Bend,OR USA
|
Did you degree the cam or install it with the dots lined up? I used that cam in a smaller stroker motor, 3.91 stroke with a 4.350 bore, I am not happy with the dyno results as I have had stock stroke motors with bigger cams make more HP and torque on pump gas than this motor did on the dyno As far as your cam and a better choice you might want to try the Comp Cams XE295HL or, if you want a solid lifter cam the Comp 294S and 306S or the XS290S grind cams may be more to your liking As already pointed out, the bigger C.I. motors eat cam duration so don't be afraid to go big, esepcailly with the 4 gear tranny BTW, I do have another 3.91 sroke pump gas motor that I had ran with a set of Eddy RPM heads and a stock OEM Eddy sixpak intake and carbs with Comps. XE295HL installed right at 3 degrees advance on the intake lobes, that motor ran high tens in my 3450 lb. Street Duster on Oregon non ethanol pump swill when I had that motor in it I'm building a 1966 Coronet deluxe two door sedan for that motor right now,I did swap the heads and put a set of ported 452 iron heads on it with a Performer RPM intake and a Holley 850 D.P. carb, it will have a NP833 O.D. trans and a 35 spline 3.54 Dana 60 in it Your choice on the cams, let us know what you choose
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: what cam are you running in your RB stroker
[Re: lewtot184]
#1703441
11/26/14 08:26 PM
11/26/14 08:26 PM
|
Joined: Oct 2005
Posts: 4,963 WI
Dcuda69
master
|
master
Joined: Oct 2005
Posts: 4,963
WI
|
|
|
|
Re: what cam are you running in your RB stroker
[Re: stateroadhog]
#1703443
11/26/14 09:45 PM
11/26/14 09:45 PM
|
Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
|
You need way more initial/shorten the slots to get back to 36-38. Might need to come in faster but I would definitely do that first. Make sure it ain't too lean (jetted) & no vac leaks. As said that otta be a killer with all the goodies it has. I forgot if it was a 4 sp or an auto (correct TC?)
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: what cam are you running in your RB stroker
[Re: stateroadhog]
#1703444
11/26/14 10:35 PM
11/26/14 10:35 PM
|
Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
|
master
Joined: Jun 2008
Posts: 3,916
usa
|
Quote:
493 stroker, stealth aluminumn heads, 10.8 to 1 comp.,195 cylinder pressure, 3.54 gears, 4-speed, MP ignition, six pack intake, 1-7/8 headers Anyone with similar set up would like to know what Cam your running, and gear ratio. Not happy with my choice XE274H-10. Hydraulic or solid.
just thinking; with that compression, all those cubes, and a small cam (closes the intake valve very early), shouldn't the cylinder pressure be much higher?
|
|
|
Re: what cam are you running in your RB stroker
[Re: stateroadhog]
#1703445
11/26/14 10:43 PM
11/26/14 10:43 PM
|
Joined: Jan 2003
Posts: 12,310 Benton, IL.
DaveRS23
Special needs idiot
|
Special needs idiot
Joined: Jan 2003
Posts: 12,310
Benton, IL.
|
My combo is very similar to yours. I have had several different cams in over the last few years. My Cuda is an auto with 3.91s. I have Scott Brown spec and grind all my cams. I have a 251*/264* FT solid in right now for it's better idle.
The fastest cam I have had in it was also the largest. 263*/273* FT solid made 520RWHP. The car ran a best of 6.89 @ 103.6.
Although I do not know your cam specs, I would be surprised if it was the root of your troubles.
Master, again and still
|
|
|
|
|