Re: Big Block head gaskets to lower compression....?
[Re: Dodgem]
#936849
02/25/11 01:38 PM
02/25/11 01:38 PM
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Joined: Feb 2005
Posts: 4,333 Prospect, PA
BSB67
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master
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Prospect, PA
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190 psi with CA 91 octane might not be doable. My experience is it won't work with gas in PA.
Last edited by BSB67; 02/25/11 01:58 PM.
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Re: Big Block head gaskets to lower compression....?
[Re: 1_WILD_RT]
#936852
02/25/11 01:49 PM
02/25/11 01:49 PM
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Joined: Oct 2003
Posts: 3,698 NE Oklahoma
Von
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Joined: Oct 2003
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Quote:
Quote:
\ While I agree oil can/will cause detonation your inference that quench is over rated & magazine "learnen" to me suggests you haven't built any motors with effective quench... \
Well some fellows at Ross pistons dont see that quench is all that important...
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Big Block head gaskets to lower compression....?
[Re: JohnRR]
#936854
02/25/11 02:01 PM
02/25/11 02:01 PM
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Joined: Feb 2005
Posts: 4,333 Prospect, PA
BSB67
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Quote:
Enginemasters 470 ran 12.2 compression with .035 quench , alum heads , and reverse flow cooling on 91 oct with no detonation at 36* , I do not know what the cranking compression was .
Sure. Reverse cooling and big cam....no surprise at all
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Re: Big Block head gaskets to lower compression....?
[Re: 1_WILD_RT]
#936855
02/25/11 07:42 PM
02/25/11 07:42 PM
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Joined: Oct 2003
Posts: 3,698 NE Oklahoma
Von
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quote When your building a race engine that doesn't need to run on pump swill then you don't have to worry about quench... You want to drive with crap fuel you might want to try it...
My discussion with the guys at Ross was a 10.5 to 1 470 that Im building. Will run on pump fuel...
I think the quench factor is WAY overrated..and the guys at Ross backed me up. Ive personally have had 2 instances with no quench and 10.5 to comp with iron heads and no detonation problems. Building another non quench motor with 10 to 1 in iron and the 470 mentioned. Also putting together a 11 to 1 512 with aluminum heads. All on pump gas. I dont expect any problems with any of them.
IMO, the cam plays more of a role than quench...
If you look around there are plenty of guys on here "breaking the rules" so to speak.
Last edited by Von; 02/25/11 07:44 PM.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Big Block head gaskets to lower compression....?
[Re: Kern Dog]
#936857
02/26/11 02:14 AM
02/26/11 02:14 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
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Back to the original question, The Fel-Pro #1105 is the 0.051" thick, 4.590" bore, 13.7cc performance head gasket. At $74 each I think the Cometic gaskets are a better deal. For Reference: The #1009 is 0.039" thick, 4.410" bore, 9.9cc The Info is from the Felpro gasket catalog: http://ecatalog.federalmogul.com/digiPub21/Felpro_Performance_and_Sport_Gasket_Catalog/index.htmThe standard ROL#HG31130 is 0.045" thick, 4.505" Bore, 11.8 cc, and cost about $12 each, The ROL Performance/High Temp #HG31130HT is the same size and costs about $22 each from this place I found: http://www.prostockautoparts.com/products/1965-DODGE-CUSTOM-V8--383-Head+Gasket,+Individual.htm I don't know what the 440 source 0.051" thick head gasket is? Mr gasket offers the thinner gaskets, thicker copper gaskets, and MLS gaskets, but still in the 0.043" thickness. I found these that may be what your looking for: SCE Pro Copper Head Gaskets, 0.062" and various bore sizes are $125 pair from Summit. or Flatout Gaskets #900464520 are 0.064" thick, 4.520 diameter, 16.8cc (calculated from bore & thickness), and cost $140/pair from Summit. Here is a link to summit chrysler big block head gaskets. You can do "show all" on gasket thicknesses. It looks like the SCE gasket have the largest selection of thicker head gaskets? http://www.summitracing.com/search/Make/...40/?Ns=Rank|Asc
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Re: Big Block head gaskets to lower compression....?
[Re: JohnRR]
#936859
02/26/11 02:30 PM
02/26/11 02:30 PM
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Joined: Oct 2003
Posts: 3,698 NE Oklahoma
Von
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NE Oklahoma
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[quoteHe THINKS, that caused the rapid ring wear ??? You lost 2 cams in that motor so you threw in a 3rd to see if it would be ok ? What do your piston skirts look like ?
X2
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Big Block head gaskets to lower compression....?
[Re: challengermike]
#936861
03/02/11 05:22 AM
03/02/11 05:22 AM
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Joined: Feb 2010
Posts: 18,493 Granite Bay CA
Kern Dog
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Striving for excellence
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Posts: 18,493
Granite Bay CA
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Quote:
cant you just back the timing down for the street and mix in alittle racegas at the track and bump it back up?
I have been doing this very thing. It just sucks to be limited this way. I figured that a slight drop in squeeze would make the car more fun to drive. I've put very few miles on this car since 2004.
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Re: Big Block head gaskets to lower compression....?
[Re: Kern Dog]
#936866
03/08/11 08:40 AM
03/08/11 08:40 AM
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Joined: Jan 2003
Posts: 75,282 A gulag near you.
JohnRR
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Posts: 75,282
A gulag near you.
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Quote:
I decided to go ahead with the Fel Pro 1009 gaskets that are common to the standard Full gasket set.
That is not the gasket that comes in the standard full kit , it is a 8519
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Re: Big Block head gaskets to lower compression....?
[Re: Kern Dog]
#936867
03/08/11 02:34 PM
03/08/11 02:34 PM
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Joined: Jul 2008
Posts: 30,632 Florida STAYcation
IcorkSOAK
Financed his waterbed
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Financed his waterbed
Joined: Jul 2008
Posts: 30,632
Florida STAYcation
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Quote:
I remember seeing these kits on the shelves of Super Shops back in the day. How and where is the water injected? If its a "plate under the carb" system like some nitrous kits, I'm out. The distance between the air cleaner and the hood can be measured with a feeler guage. If it requires drilling a hole in the intake like a vacuum port, I'm listening........
The only thing that is needed is a small line and nozzle directed into the primary side of the carb normally through the top of the air cleaner.
SpearCo is the system I used(and I still have a couple of sets left!) ... but Edelbrock made one too. The GOOD systems meter the liquid THREE diff ways .... engine vaccum, engine RPM and the nozzle size.
I have not done any type of tweaking lately(not in years) ... but I did back in the day. I had a gasser-dually(400 motor) ... with a camper ...towing a 32 foot trailer ...and experimented with it then. It REALLY helped with power(OF COURSE not like NOS!), helped with MPG, allowed me to back-off to mid-grade fuel AND cleaned the motor up.
It is just like steam-cleaning ... just as an experiment - I swapped out a severely carboned-up spark plug for a good one .... and in 75-100 miles .. it was like new ....
I used to have a search on eBay for these systems ...and some of them went for cRaZy money. So some people still use them. I am going to use one on my motorhome project ...and am going to tune the whole combo with a wide-band O2.
I do not know how WI will affect that.
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Re: Big Block head gaskets to lower compression....?
[Re: JohnRR]
#936868
03/09/11 02:56 AM
03/09/11 02:56 AM
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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:
That is not the gasket that comes in the standard full kit , it is a 8519
Hmmm. What is the difference between the 2? The ones in the set are the blue perma torque. These are supposed to be .039 compressed.
I was REALLY close to firing the motor today. The #5 and #7 spark plugs felt as if they were cross threading so I stopped. I need to buy a thread chaser to clean the threads. Heres the car that the motor will go into...
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