Anyone using stock GM MLS gaskets on there H/C Combo
06-19-2009, 07:27 PM
#3
http://forums.corvetteforum.com/c5-t...ods-print.html
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06-19-2009, 08:40 PM
#8
I was about to use them until I realized that I would rather not hold anything back and just get the cometics at 0.040" to improve quench. $100 extra for the cometics isn't that bad for a $3000 build and I'll be happy knowing I didn't leave a few ponies on the table.
06-19-2009, 09:10 PM
#9
The GM MLS are very good gaskets.
If you want the absolute very best gasket you need to run the Cometics.
I'm the GM MSL on my new build right now.
Just like the Morels are the very best lifter for the LS Engine, the caddy and the ls7 are very good but not the absolute best.
But all great parts just as long as your expectations/goals are in line.
If you want the absolute very best gasket you need to run the Cometics.
I'm the GM MSL on my new build right now.
Just like the Morels are the very best lifter for the LS Engine, the caddy and the ls7 are very good but not the absolute best.
But all great parts just as long as your expectations/goals are in line.
06-20-2009, 03:04 AM
#10
Whats this I hear now about comestics leaking and are not as strong as the GM ones. Maybe I am wrong.
Also as far as quench goes cant you just find hp in other areas. Are a few ponies worth it, I guess it is to some.
Also as far as quench goes cant you just find hp in other areas. Are a few ponies worth it, I guess it is to some.
Last edited by corvet786c; 06-20-2009 at 03:31 AM.
06-20-2009, 06:56 AM
#11
I haven't heard of the cometics leaking? As for quench sure you can find HP elsewhere but my thinking is that if I'm putting some of the best heads on there with a nice sized cam that I might as well go for the best gaskets that will optimize quench and allow a couple extra ponies.
06-20-2009, 07:20 AM
#12
Dude there is no such thing as too much HP ... 
... I chose to optomize my combination buy using the best possible parts as a total package that worked very well together and I was rewarded with obtaining the goal that I and set for myself...bet you do not hit yours with your choice of parts....( I see that you have lowered you goal... bet ya still dont hit it) please post your dyno sheet when you finish I will be curious to see the results...as to cometic gaskets .. I've been using cometics for many years with no problems ... any head gasket will not seal properly if the preperation is not done correctly...good luck with your project..
... I chose to optomize my combination buy using the best possible parts as a total package that worked very well together and I was rewarded with obtaining the goal that I and set for myself...bet you do not hit yours with your choice of parts....( I see that you have lowered you goal... bet ya still dont hit it) please post your dyno sheet when you finish I will be curious to see the results...as to cometic gaskets .. I've been using cometics for many years with no problems ... any head gasket will not seal properly if the preperation is not done correctly...good luck with your project..
06-20-2009, 09:41 AM
#13
To some people yes ever 1 HP they can gain is very important, if by optimizing the quench nets me 5 extra HP then that is 5 HP i dont have to find elsewhere, its right there.
(My application the MG MSL just happened to be the correct thickness we needed for my quench with my 61cc decked heads, comp ratio power goals)
You are not wrong for wanting to run the GM MLS just as long as your expectations are in line.
The combustion chamber is where you make all your power so optimize it accordingly.
There is a bit more prep involved with running the cometics a deck that needs to be flatter etc., they are not as forgiving as the GM MLS ones.
But may people run the cometics with no isssue. There are here that say the GM MLS will leak as well, but People will always have issue with any product top brand and lower.
You need to buy parts based on your power goals and application, drag race, road race, etc.
(My application the MG MSL just happened to be the correct thickness we needed for my quench with my 61cc decked heads, comp ratio power goals)
You are not wrong for wanting to run the GM MLS just as long as your expectations are in line.
The combustion chamber is where you make all your power so optimize it accordingly.
There is a bit more prep involved with running the cometics a deck that needs to be flatter etc., they are not as forgiving as the GM MLS ones.
But may people run the cometics with no isssue. There are here that say the GM MLS will leak as well, but People will always have issue with any product top brand and lower.
You need to buy parts based on your power goals and application, drag race, road race, etc.
Last edited by bigboykilroy; 06-20-2009 at 09:47 AM.
06-20-2009, 11:16 AM
#14
Any head gasket will leak if you dont install it right.
Why spend all that money on those AFR heads and not get the most out of your combo by getting decent compression.
Just use whatever gaskets get you in the 11:1 range but keep the DCR livable, with your smaller cam you should be able to get right around 11.0:1.
Why spend all that money on those AFR heads and not get the most out of your combo by getting decent compression.
Just use whatever gaskets get you in the 11:1 range but keep the DCR livable, with your smaller cam you should be able to get right around 11.0:1.
06-20-2009, 12:45 PM
#15
Any head gasket will leak if you dont install it right.
Why spend all that money on those AFR heads and not get the most out of your combo by getting decent compression.
Just use whatever gaskets get you in the 11:1 range but keep the DCR livable, with your smaller cam you should be able to get right around 11.0:1.
Why spend all that money on those AFR heads and not get the most out of your combo by getting decent compression.
Just use whatever gaskets get you in the 11:1 range but keep the DCR livable, with your smaller cam you should be able to get right around 11.0:1.
I will let all you guys know when I get my dyno results and you are goin to be surprised with my baby cam set up and my handheld tuner. hahahah
06-20-2009, 01:31 PM
#16
I used the newer GM MLS gaskets for my build. I chose to have my heads milled to the proper cc size and run MLS gaskets. Milling my heads cost $50 and the GM MLS gaskets are $28 from Scoggin Dickey. My setup was budget but I achieved the compression ratio I wanted while having proper piston to valve clearance. My gaskets measured right at .051" thick.
Now keep in mind the pistons stick out of the deck .005-.007" on most stock LS1's. I felt that a .040-.045" quench is perfect. I did not see any reason to run a .035" quench as I think there is no benefit on a street car.
Now keep in mind the pistons stick out of the deck .005-.007" on most stock LS1's. I felt that a .040-.045" quench is perfect. I did not see any reason to run a .035" quench as I think there is no benefit on a street car.
Last edited by Nitroused383; 06-20-2009 at 01:39 PM.
06-20-2009, 03:07 PM
#18
I used the newer GM MLS gaskets for my build. I chose to have my heads milled to the proper cc size and run MLS gaskets. Milling my heads cost $50 and the GM MLS gaskets are $28 from Scoggin Dickey. My setup was budget but I achieved the compression ratio I wanted while having proper piston to valve clearance. My gaskets measured right at .051" thick.
Now keep in mind the pistons stick out of the deck .005-.007" on most stock LS1's. I felt that a .040-.045" quench is perfect. I did not see any reason to run a .035" quench as I think there is no benefit on a street car.
Now keep in mind the pistons stick out of the deck .005-.007" on most stock LS1's. I felt that a .040-.045" quench is perfect. I did not see any reason to run a .035" quench as I think there is no benefit on a street car.
06-20-2009, 04:12 PM
#19
I've updated that head gasket spreadsheet many times since it was posted. Here is the latest version: https://ls1tech.com/forums/generatio...ht=head+gasket
Also, if you want the best MLS gasket then it's Fel Pro.
Also, if you want the best MLS gasket then it's Fel Pro.
