Over worried IMO, but not without merit.
Run the thick gasket and you’ll be fine.
Run the thick gasket and you’ll be fine.
Need some advice on some cylinder head gaskets
- Thread starter naji408
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naji408
Well-Known Member
These are the copper gasket. Their website says no need to o-ring the block. Summit says you do though. Anybody have any experience on these?
SCE Gaskets P690693R SCE Pro Copper Head Gaskets | Summit Racing
SCE Gaskets P690693R SCE Pro Copper Head Gaskets | Summit Racing
Honorable mention head gasket may be the FelPro 540 PermaTorque SD. I’ve got a set and the bore measures 4.035 (Felpro says 4.065, but both of mine measure 4.035) and they’re .060 thick out of the pack, so by Felpro’s directions they should come in at .055 compressed thickness.
But you’re probably not going to drop much compression with the 11.5 cc gasket volume.
https://www.oreillyauto.com/detail/...1/automotive-truck-1985-dodge-d150-pickup-rwd
But you’re probably not going to drop much compression with the 11.5 cc gasket volume.
https://www.oreillyauto.com/detail/...1/automotive-truck-1985-dodge-d150-pickup-rwd
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But with 10 to 15 pounds of boost I’d see if I could search to the ends of the internet and find the right side match to this gasket. SCE claims you don’t have to O ring to run them with the rubber coating and neoprene seals around the coolant, but they advise o rings with power adders. Since you’ll have the heads off anyway, it wouldn’t be much to have them cut for receiver grooves. The 15.3 cc volume should help drop a little compression. You wouldn’t have the P/N on the pistons would you?
DODGE SCE Gaskets T690672L SCE Titan Copper Head Gaskets | Summit Racing
DODGE SCE Gaskets T690672L SCE Titan Copper Head Gaskets | Summit Racing
67 gt
A Wog boy who loves his Mopars !
I hope your running head studs as with boost it will make its way out !
And with potential for 15 lbs of boost and only 4 head bolts per cylinder, o rings aren’t going to hurt anything. Sure, the super duty PT gaskets will hold with studs under normal conditions. But with boost and pump gas, you need added detonation resistance. You are correct in wanting to control the gasket bore size with the closed chamber magnum heads. Not for gasket strength, but for end gasses and hot spots. But if you can get a pair of the .093 copper titan gaskets, that’s the route I would go and get the heads cut for o rings. It’s somewhat radical (and expensive, to boot!) but another option is to get whatever gasket you can and have the head decks fly cut the gasket bore diameter by .060 deep. Basically a copy of the edelbrock 60179 340 head made for positive deck pistons. It’s just a shame parts availability has gotten so bad that you’d even have to consider that as an option…
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Chrysler LA V8 .086
I have a pair of these available. They are used and in great condition. They have around 15-20 dirt shows on them. They were in a 360 B-Mod.
I have a pair of these available. They are used and in great condition. They have around 15-20 dirt shows on them. They were in a 360 B-Mod.
Rmoore
Well-Known Member
Yes Sir I agree ! But, since how I don’t know what pistons the op has and I don’t know whether he has a zero deck , and there is a whole host of other things that are unknown I was just letting the op know that running a thick head gasket can give him more quench then desired ! You may have built this engine and know exactly what the op’s motor is I don’t know ! The facts are though if the op has to much quench or if anyone has to much quench , that can lead to a detonation problem ! Didn’t know if the op or anyone else knew that or not ! Since the op is not doing a motor rebuild just pulling the heads off , this could be some good info to know !
naji408
Well-Known Member
These are the pistons
ICON IC745KTD-030 ICON Premium Forged Piston and Ring Kits | Summit Racing
For some reason I cannot figure out what stroker kit I have. I’ve checked all receipts on my build and that’s the only part number I can’t find
Rmoore
Well-Known Member
Yes it doesn’t give you the deck height of the pistons ! You can put the piston on TDC when you pull your heads off , and measure the deck height then !
naji408
Well-Known Member
ICON Forged Piston - Chry 408 Rod 6.123 Step Dish +20.5cc 2V Kit W/Rings
I doubt the bore size makes a difference on the piston head, but this from their website.
Rmoore
Well-Known Member
I didn’t see the pistons deck height ! It does give you the deck height of the block, but not the pistons that I seen !
Rmoore
Well-Known Member
Here is a for instance in this picture ! It gives you a Distance below Deck a plus or a minus figure !
If it's at the design parameters of .012 under deck based on a 9.6 deck height and Edelbrock Magnum 58 cc chambers, the .093 gasket to drop it to 9-1/4:1. I don't know what head gaskets you've got, but if they're thicker than .035 you don't have any quench anyway if the pistons are at .012 below deck. I don't believe you'll have any problems with lack quench with the Edelbrock magnum chambers.
naji408
Well-Known Member
Do you know if the PermaTorque SD’s are MLS? And if so, should they be copper sprayed?
No, they're not an MLS and only to be used with DRY & CLEAN installation with a recommended surface finish of RA 60-80. If all the parameters are the same as I factored before you're going to be at 10:1 with them unless you have the chambers opened up.
naji408
Well-Known Member
But will they handle the boost?
here's what i seen that seems to work is 1008's torqued wait 12 hours retorque run engine thru 4 or 5 heat cycles retorque reset valves and damn near bullet proof at 10 psi with proper timing . jmso
naji408
Well-Known Member
I see that's the most viable option, just the thickness isn't where I'd like them.
The PermaTorque SD gaskets are made nearly identically to the high performance 1008 gaskets.
naji408
Well-Known Member
If that’s the case then I should go either 519sd or 540sd.
If the 1008 seem to be the go to head gasket for boost (reading a lot of other forums) then getting on of the permatorqe’s that are thicker is just wiser.
Magnum deck height is 9.58 vs 9.6 for La, and those pistons are zero deck if it hasn’t been decked(This part is new to me so I could be wrong). 58cc heads and .039(1008) gaskets puts you at 10.5:1 compression.
I would agree on thicker gaskets, but you do need to consider the pistons as a possible weak point. Some piston dishes are just cnc’d Leaving them fairly thin:
Self Tuning Pistons (new marketing idea)...
Might also be wise to start learning about water/meth injection.
I would agree on thicker gaskets, but you do need to consider the pistons as a possible weak point. Some piston dishes are just cnc’d Leaving them fairly thin:
Self Tuning Pistons (new marketing idea)...
Might also be wise to start learning about water/meth injection.
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On a side note, some of the turbo ricer boys are using the .020 copper head shims (Felpro 8553SP in this case) with copper cote on both sides and high performance head gaskets without any problems at over 15 pounds of boost. A set with some Felpro 521 SD gaskets https://www.oreillyauto.com/detail/...1/automotive-truck-1985-dodge-d150-pickup-rwd would put you at 16.9cc’s, which should drop you to 9:1.
naji408
Well-Known Member
I’m not too familiar with the spacers. Do you put one spacer on the deck, and place the head gasket (sd’s dry no spray) on top of that?
Thanks turbovan! If that’s correct, he’s in deep doo doo at 10.5:1 and the spacer even with an extra thick gasket is only going to drop it to around 9.5:1. On the spacers, that’s correct. Put the coppercote on the copper coat on the deck spacer and put the SDs on dry with the neoprene facing up. But you really need to find out where your pistons are at. If you’ve got zero deck, you need some super thick cometics.
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