Headgaskets

all the NECESSARY specs DON,T SEEM to be there, whats the quench distance between the block deck and the piston(HOW far is it below or above the block deck at TDC)
and have you (O)ringed the block or heads?
whats the current combustion chamber size?
is the blocks bore releived near the valves and if so how far back does the releif cut go??
what boost level are you running?
CAM TIMING?
COMPRESSION LEVEL?
have the block or heads been decked"
 
grumpyvette said:
all the NECESSARY specs DON,T SEEM to be there, whats the quench distance between the block deck and the piston(HOW far is it below or above the block deck at TDC)
and have you (O)ringed the block or heads?
whats the current combustion chamber size?
is the blocks bore releived near the valves and if so how far back does the releif cut go??
what boost level are you running?
CAM TIMING?
COMPRESSION LEVEL?
have the block or heads been decked"
Click to expand...


I went ahead and ordered the Felpro 1074s as ALOT of the boosted LT1 guys have had good luck with them.. It is going to put me at about a 9.1:1 CR which is higher than I wanted (8.5-9.0) but when I go to an aftermarket casting, the combustion chambers will be up to 64cc's so that will drop it substantially.

Sorry for the lack of info..

The quench is stock (on stock blocks it has varied between .020 and .027) The previous owner of this block told me it was at .020

Neither the block nor the heads are o-ringed (I will not be going over 15-17psi)

The combustion chambers will be stock (which once again varies... 53-57cc)

To my knowledge there are no reliefs that you are talking about (The pistons are a -24cc dish)

The heads/block have not been decked and will not be unless there is a serious surface problem.

I'm not sure I know what you mean by Cam timing... the timing itself wont be figured out until the tuning stages commence
 
ok with that good additional info I can make a valid selection, on parts, but since you already ordered thats kind of pointless at this point.
btw thwcam timing question was only there to get some idea as to your intended dcr and rpm band
 
grumpyvette said:
ok with that good additional info I can make a valid selection, on parts, but since you already ordered thats kind of pointless at this point.
btw thwcam timing question was only there to get some idea as to your intended dcr and rpm band
Click to expand...

I actually wouldn't mind your advice even though I ordered already. (Nothing says I can't just send the parts back to summit and order new ones)

I believe I am going to stick with the 1074s but if for whatever reason I have problems then your help now could certainly save me time later on.

RPM wise... I should be looking to rev no higher than 6700... I will still be running the stock pcm, which in many cases takes a dump after 7000 so I wont risk going that high.

I appreciate the response

-Ryan
 
IF IT WAS MY ENGINE ID USE something similar to THESE,(PROBABLY A DIFFERENT PART NUMBER BUT THE PURE COPPER .021 THICK GASKET) yes IM FULLY AWARE it says you require (O-RINGS) IM using them now on my 383 without (O-RINGS) and have been very successfully for over 10 years
copperheadgasket.jpg

ID CALL AND SUGGEST YOU HAVE A LONG TALK WITH THE SCE TECH GUYS BEFORE ORDERING, but IVE found the gaskets to work great installed wet with a coat of copper spray gasket sealer,here is SCEs info

Phone Numbers:
661-728-9200



http://www.scegasketsonline.com/product ... ducts.html

011002
Head Gaskets, Pro Copper, fits Small Block Chevrolet, SBC. Bore Opening: 4.010”; Gasket Thickness: .021”; Material: Annealed Copper; Package...

OR

011062
Head Gaskets, Pro Copper, fits Small Block Chevrolet, SBC. Bore Opening: 4.060”; Gasket Thickness: .021”; Material: Annealed Copper; Package...

read this thread
viewtopic.php?f=50&t=827&p=1231&hilit=copper#p1231

IVE had ZERO problems installing those solid copper head gaskets,or failures WITHOUT O-RINGS, if your not comfortable using them that's fine, the steel shim gaskets are cheaper and work really well.on steel heads,, provided they will give decent quench distances

http://store.summitracing.com/partdetai ... toview=sku

http://store.summitracing.com/partdetai ... toview=sku

steel head gaskets won,t work correctly on aluminum heads simply because aluminum being significantly softer , will indent and loose clamping force over time, you will need to use a head gasket that's designed for aluminum, Id suggest contacting SCE, and FELPRO to ask their advice, IVE never had the slightest problem with the thin copper head gaskets used without the o-rings but unless the heads and deck on the block are perfectly flat you could have, so your a bit safer going with the standard gasket designs
SUMMIT RACING,BRODIX, DART,or AIR FLOW RESEARCH TECH GUYS MIGHT ALSO HELP, but keep in mind you want to try for a .038-.044 quench distance
read this
viewtopic.php?f=53&t=726&p=2302&hilit=quench#p2302

ID suggest trying for a MIMIMUM of .038-.044 on a 496 BBC for quench as the long stroke bbc, or any BBC run over about 6000rpm with a 4" or longer stroke) tends to allow the quench clearance distance to tighten up a bit at high rpms, as parts stretch under stress/inertial loads
 
The big thing I was wondering about is the amount of the bore opening I should get for the gaskets... the motor is 4.030 so I would obviously need at least a 4.040 bore on the gasket
 
011062
Head Gaskets, Pro Copper, fits Small Block Chevrolet, SBC. Bore Opening: 4.060”; Gasket Thickness: .021”; Material: Annealed Copper; Package...

ID CALL AND SUGGEST YOU HAVE A LONG TALK WITH THE SCE TECH GUYS BEFORE ORDERING, but IVE found the gaskets to work great installed wet with a coat of copper spray gasklet sealer,heres sces info
headgasjk.png

Phone Numbers:
661-728-9200

copperspray1.jpg

when installing almost any head gasket, but especially with a copper head gasket be sure to put on two wet even coats on both sides of the head gasket and install and torque while the copper coat sprays still damp
http://www.aa1car.com/library/2005/ic010532.htm

http://www.mobiloil.com/USA-English/Mot ... asics.aspx

http://www.babcox.com/editorial/us/us80222.htm

http://newcarbuyingguide.com/index.php/ ... event=view

http://www.thomasnet.com/articles/hardw ... et-failure

http://www.trustmymechanic.com/htmlmessage6.html

http://www.arrowheadradiator.com/preven ... ilures.htm
 
Last edited by a moderator:
"HEY GRUMPYVETTE, How are "MR. Gasket" head gaskets?

I talked to a tech over there and he told me about there gasket #1130 its a still shim 4.100 bore with a .020 comp. thickness with a coating on them that can be used with aluminum heads he also told me they should handle up to a 250 shot the price on them is super cheap too but don't know how they are???

I just personally never had to much dealing with them to know if there products are any good in the performance department?"

Ive never used them to my knowledge but they are most likely a repackaged head gasket from one of the major manufacturers,
ITS ALWAYS a good idea to place a call to the tech guys from the cylinder head manufacturer and head gasket manufacturer when you have questions simply because they BOTH want to avoid problems with their customers and will generally provide you with good advice while sales guy may not!
if they say they are designed for aluminum heads than why not try them,
I think your starting to get to the point your worried about minor stuff,that's rather easily changed if you decide to make changes. now I won,t say something silly like "gaskets are gaskets" because there ARE differences! but a coated steel embossed head gasket is a fairly simply technology that's been researched for over 100 years now. and selecting the wrong or an unusable head gasket if you follow the manufacturers instructions on selection and installation is unlikely
 
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