Re: Anyone use Flatout rubber coated copper head gaskets?
[Re: Kern Dog]
#1465929
07/10/13 04:15 PM
07/10/13 04:15 PM
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Joined: Aug 2003
Posts: 43,312 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,312
Bend,OR USA
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I would change the cam and degree it so it is advance 3 to 5 degrees on the intake side and try that before lowering the compression ratio ![](/ubbthreads/images/graemlins/Twocents.gif) I ran 10.78 to 1 comp. ratio on my Duster motor with the last set of heads(76 CC Indy SR) on the motor before I sold the car, it ran great( 9.96 at 134.7 MPH at 3450 Lbs through the muffs) on 91 octane Oregon non ethanol pump swill ![](/ubbthreads/images/graemlins/shruggy.gif) I had a set of 84 CC Eddy RPM heads on it also, they had 10.29 to 1 compression, the car ran low tens with them on it on pump gas ![](/ubbthreads/images/graemlins/thumbs.gif) That motor had no signs of detontation ever on either set up ![](/ubbthreads/images/graemlins/shruggy.gif) What spark plug and heat range are you running now and how much total timing are you running ? I think your location is at or close to sea level, correct?
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Anyone use Flatout rubber coated copper head gaskets?
[Re: Cab_Burge]
#1465930
07/10/13 04:37 PM
07/10/13 04:37 PM
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Joined: Feb 2010
Posts: 18,493 Granite Bay CA
Kern Dog
OP
Striving for excellence
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OP
Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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Quote:
What spark plug and heat range are you running now and how much total timing are you running ? I think your location is at or close to sea level, correct?
As is, I'm running Champion RC9YCs. I had the 12s like Edelbrock suggests but the engine had consistent run-on until I switched to the colder plug. I am just barely above seal level. I am told that the MP distributor has an aggressive timing curve. I'm at 17 initial, 31 total in really early, like under 2500. It knocks at WOT on 91. A mix of 110 and 91 cures the knock, but I want to make it street friendly. Some of the responses I'm getting elsewhere suggest to skip the head gasket swap and concentrate on the timing curve and a cam swap. I just wish that I knew someone that had a near identical engine combo so I could get a better idea of which cam would work. 4000 70 Charger, stock body, 295 tire, 3.91 gear with a Gear Vendors OD. 440, .030 over 4.35 bore. Ross Flat Top pistons, 6 cc valve reliefs, .017 in the hole at TDC. Edelbrock heads, 84 ccs UNported, .039 head gasket. .056 quench distance. 292/509 cam installed straight up, 1.6 rockers, 3/8" pushrods. 850 Demon VS, 85/92 jets, 3.5 PV 2" TTI headers, 2 1/2" exhaust
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Re: Anyone use Flatout rubber coated copper head gaskets?
[Re: Kern Dog]
#1465931
07/10/13 08:49 PM
07/10/13 08:49 PM
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Joined: Jan 2007
Posts: 437 south central pa
bdaz smblk
mopar
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mopar
Joined: Jan 2007
Posts: 437
south central pa
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Please don't waist your money on the rubber coated flatout gaskets.I used them one time and after about 15-20 passes the rubber coating came off and they started leaking water.
3120lb, small block, 10.5" tire, NA, through exhaust, full int, WITH 83/4 REAR, 9.0 at 150mph
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