Intake help + gasgacinch?
Thread Starter
Burning Brakes
Joined: Sep 2017
Posts: 1,073
Likes: 65
From: Belgium
Intake help + gasgacinch?
Hey everyone
It's my last week in the US now...
I have two questions regarding products for my 77 l48.
1. I've looked in the Summit Georgia store, and multiple Advanced auto parts and Autozone stores, but they all didn't have Gasgacinch...
Is there an alternative product for 'gasgacinch' to use with the intake manifold gaskets?
2. I will use the Edelbrock 7201 gasket that came with my performer intake. I read some reviews on the gasket and it seems to be a good gasket.
I will keep the heat stove choke. Do I need to use the crossover block off plates (they don't intirely block off the two crossover ports, because there is a hole in the plates).
Use the plates or not?
Don't have the EGR provisions on the new intake, and I'm running headers, so no EFE either.
It's my last week in the US now...
I have two questions regarding products for my 77 l48.
1. I've looked in the Summit Georgia store, and multiple Advanced auto parts and Autozone stores, but they all didn't have Gasgacinch...
Is there an alternative product for 'gasgacinch' to use with the intake manifold gaskets?
2. I will use the Edelbrock 7201 gasket that came with my performer intake. I read some reviews on the gasket and it seems to be a good gasket.
I will keep the heat stove choke. Do I need to use the crossover block off plates (they don't intirely block off the two crossover ports, because there is a hole in the plates).
Use the plates or not?
Don't have the EGR provisions on the new intake, and I'm running headers, so no EFE either.
Race Director
Joined: Jul 2015
Posts: 13,082
Likes: 3,399
From: SW Florida.
never heard of it before just now. the can implies it is similar to Indian Head gasket shellac compound. we all use silicone RTV. but go to their website and click where to buy. http://gasgacinch.com/ girl on the can on her back with legs in the air. maybe it is good for other stuff besides gaskets...
Last edited by derekderek; Jul 29, 2019 at 06:21 PM.
Burning Brakes
Joined: Jul 2016
Posts: 767
Likes: 74
From: Blaine MN
I have used Permatex High Tack successfully several times over the years instead of the Edelbrock product.
The heat riser passage will slightly hurt performance if not blocked off, I dont think it's going to be noticable on a street only car though imo. If your manifold/carb have a divorced choke setup the choke spring will take longer to relax if heat riser/passages aren't operational.
That whole design is an emissions control system, my BB AFR heads don't even have the passages and yet my divorced choke on the tri-power manifold works fine (choke pull off works harder till the spring relaxes).
The heat riser passage will slightly hurt performance if not blocked off, I dont think it's going to be noticable on a street only car though imo. If your manifold/carb have a divorced choke setup the choke spring will take longer to relax if heat riser/passages aren't operational.
That whole design is an emissions control system, my BB AFR heads don't even have the passages and yet my divorced choke on the tri-power manifold works fine (choke pull off works harder till the spring relaxes).
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Permatex, The Right Stuff.
Except around the water ports. I prefer Permatex clear RTV there.
Summit sells that Gasgacinch, but I did not see it on the shelf in GA Summit either. Have to ask at the parts counter. It is an exclusive Edelbrock product and may not be ordered by companies like Advanced or the Zone. It works really well, except at the water ports.
Keep in mind the intake gasket has to seal not only gasoline, but oil and anti-freeze.
Except around the water ports. I prefer Permatex clear RTV there.
Summit sells that Gasgacinch, but I did not see it on the shelf in GA Summit either. Have to ask at the parts counter. It is an exclusive Edelbrock product and may not be ordered by companies like Advanced or the Zone. It works really well, except at the water ports.
Keep in mind the intake gasket has to seal not only gasoline, but oil and anti-freeze.
Last edited by HeadsU.P.; Jul 30, 2019 at 08:34 AM.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
I use the brown permatex brush on stuff. Goes great with the cork gaskets on the china walls.If you let it set up and use a dab of right stuff in the corners youll be happy
Silicone shrinks over time
8 yrs no leaks yet albeit lo miles.
Silicone shrinks over time
8 yrs no leaks yet albeit lo miles.
Melting Slicks
Joined: Mar 2006
Posts: 3,456
Likes: 102
From: Piedmont Va
St. Jude Donor '11-'12-'13,'19-'20
I have used Permatex High Tack successfully several times over the years instead of the Edelbrock product.
The heat riser passage will slightly hurt performance if not blocked off, I dont think it's going to be noticable on a street only car though imo. If your manifold/carb have a divorced choke setup the choke spring will take longer to relax if heat riser/passages aren't operational.
That whole design is an emissions control system, my BB AFR heads don't even have the passages and yet my divorced choke on the tri-power manifold works fine (choke pull off works harder till the spring relaxes).
The heat riser passage will slightly hurt performance if not blocked off, I dont think it's going to be noticable on a street only car though imo. If your manifold/carb have a divorced choke setup the choke spring will take longer to relax if heat riser/passages aren't operational.
That whole design is an emissions control system, my BB AFR heads don't even have the passages and yet my divorced choke on the tri-power manifold works fine (choke pull off works harder till the spring relaxes).
Thread Starter
Burning Brakes
Joined: Sep 2017
Posts: 1,073
Likes: 65
From: Belgium
Ok, guys thanks for the info!
I just read some other reviews that the edelbrock gaskets 2701 are designed to go with edelbrock aluminum heads... they won't fit my stock l48 heads.
I will go for Fel-pro, but there are two sets that the Summit filter offers:
With block plate?
Felpro MS90322
https://www.summitracing.com/parts/f...SABEgJCDvD_BwE
Felpro 1204
https://www.summitracing.com/parts/f...SABEgLfovD_BwE
Without block plate?
Felpro 1256
https://www.summitracing.com/parts/f...make/chevrolet
I just read some other reviews that the edelbrock gaskets 2701 are designed to go with edelbrock aluminum heads... they won't fit my stock l48 heads.
I will go for Fel-pro, but there are two sets that the Summit filter offers:
With block plate?
Felpro MS90322
https://www.summitracing.com/parts/f...SABEgJCDvD_BwE
Felpro 1204
https://www.summitracing.com/parts/f...SABEgLfovD_BwE
Without block plate?
Felpro 1256
https://www.summitracing.com/parts/f...make/chevrolet
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Thread Starter
Burning Brakes
Joined: Sep 2017
Posts: 1,073
Likes: 65
From: Belgium
What do you guys think?
Will the blocked off crossover do any harm to my engines performence? Will it do any harm on long therm?
I will keep the 'heat stove choke'. Will choke still work good, when the crossover is blocked?
Already done:
- EFE system is completely removed.
- EGR system is completely removed.
- A.I.R. system is removed.
- Longtube headers installed and true dual exhaust
Will the blocked off crossover do any harm to my engines performence? Will it do any harm on long therm?
I will keep the 'heat stove choke'. Will choke still work good, when the crossover is blocked?
Already done:
- EFE system is completely removed.
- EGR system is completely removed.
- A.I.R. system is removed.
- Longtube headers installed and true dual exhaust
Melting Slicks
Joined: Nov 2000
Posts: 2,738
Likes: 53
From: Bogart GA
I do not like Gasgacinch. I only use RTV around water ports and on the china walls. When that stuff gets hots it weeps from all the joints where it is used. Makes quite a mess. It is probably OK using small dabs to locate and hold the gasket in place but I would not use it for sealing. It seems like it never completely cures. It is basically contact cement.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
I never had any issues with Gasgacinch. You would think that whatever the world leader in Intake Manifold design and number one in sales recommends has more credibility than someone here on this forum.
You have to give that product time to set up overnite. It is not a "quick-set" like The Permatex Right Stuff is. That product was designed for mechanics / shops that need quick turn-around time and get the customer out-the-door.
You be the judge.
You have to give that product time to set up overnite. It is not a "quick-set" like The Permatex Right Stuff is. That product was designed for mechanics / shops that need quick turn-around time and get the customer out-the-door.
You be the judge.
Thread Starter
Burning Brakes
Joined: Sep 2017
Posts: 1,073
Likes: 65
From: Belgium
I never had any issues with Gasgacinch. You would think that whatever the world leader in Intake Manifold design and number one in sales recommends has more credibility than someone here on this forum.
You have to give that product time to set up overnite. It is not a "quick-set" like The Permatex Right Stuff is. That product was designed for mechanics / shops that need quick turn-around time and get the customer out-the-door.
You be the judge.
You have to give that product time to set up overnite. It is not a "quick-set" like The Permatex Right Stuff is. That product was designed for mechanics / shops that need quick turn-around time and get the customer out-the-door.
You be the judge.
I will keep the 'heat stove choke'. Will choke still work good, when the crossover is blocked?
Race Director
Joined: Mar 2016
Posts: 14,332
Likes: 8,139
From: Napa Valley California
I've used Gasgacinch for years and as stated above it is not a hurry up and get it together product.
If you use it as directed it is great stuff.
It will last you a long time as it takes just a smear on each surface.
Less is better.
If you gob it on like RTV it will be a mess.
A good RTV works well, just read all the labels and use as the manufacturer directs.
If you use it as directed it is great stuff.
It will last you a long time as it takes just a smear on each surface.
Less is better.
If you gob it on like RTV it will be a mess.
A good RTV works well, just read all the labels and use as the manufacturer directs.
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
If you run the crossover blocked....the choke may not function correctly. You would have to convert it to an electronic choke. Blocking the crossover does nothing to hurt and in fact helps the engine live longer by keeping the heads and intake cooler. Hot heads mean thin oil. Any modern small block build does not even have provision for it and very few aftermarket manufactures offer a head with it. Block it, convert to electric choke and be happy 
Jebby
Jebby
Thread Starter
Burning Brakes
Joined: Sep 2017
Posts: 1,073
Likes: 65
From: Belgium
If you run the crossover blocked....the choke may not function correctly. You would have to convert it to an electronic choke. Blocking the crossover does nothing to hurt and in fact helps the engine live longer by keeping the heads and intake cooler. Hot heads mean thin oil. Any modern small block build does not even have provision for it and very few aftermarket manufactures offer a head with it. Block it, convert to electric choke and be happy
Jebby
Jebby
Race Director
Joined: Mar 2016
Posts: 14,332
Likes: 8,139
From: Napa Valley California
The choke on my 73 hasn't worked since I purchased it.
I just start it up first thing in the morning and keep the rpm up to about 1100 until it will idle on its own.
As soon as the temp gauge starts to move it is time to go and it starts and idles the rest of the day without any issues.
Not having a choke is no big deal especially when some of us old guys grew up running cars without them.
I never had a choke on any of my drag boats and on my Malibu and Mastercraft ski boats, I pulled the choke as they would always load up first thing in the morning for those 05:30 a.m. ski runs.
I just start it up first thing in the morning and keep the rpm up to about 1100 until it will idle on its own.
As soon as the temp gauge starts to move it is time to go and it starts and idles the rest of the day without any issues.
Not having a choke is no big deal especially when some of us old guys grew up running cars without them.
I never had a choke on any of my drag boats and on my Malibu and Mastercraft ski boats, I pulled the choke as they would always load up first thing in the morning for those 05:30 a.m. ski runs.
Last edited by OldCarBum; Aug 6, 2019 at 11:24 AM.
Thread Starter
Burning Brakes
Joined: Sep 2017
Posts: 1,073
Likes: 65
From: Belgium
If you run the crossover blocked....the choke may not function correctly. You would have to convert it to an electronic choke. Blocking the crossover does nothing to hurt and in fact helps the engine live longer by keeping the heads and intake cooler. Hot heads mean thin oil. Any modern small block build does not even have provision for it and very few aftermarket manufactures offer a head with it. Block it, convert to electric choke and be happy
Jebby
Jebby
Or are the metal blocking plates enough?
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
