Carb opinions
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Carb opinions
I'm in the process of choosing what carb to top off my motor with. My current build specs are.
Cam undecided either comp 260H or 268H.
Bored 30 over with silvolite 1138 pistons
C6AE-R heads if it matters
Stock 4bbl intake
1 3/4 headers 2.5 in exhaust
Auto trans 4:10 gears
I was thinking in the 700 cfm range. Any suggestions would be appreciated.
Thanks
Nick
Cam undecided either comp 260H or 268H.
Bored 30 over with silvolite 1138 pistons
C6AE-R heads if it matters
Stock 4bbl intake
1 3/4 headers 2.5 in exhaust
Auto trans 4:10 gears
I was thinking in the 700 cfm range. Any suggestions would be appreciated.
Thanks
Nick
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Joined: Jul 2003
Posts: 1,287
Likes: 3
I'm in the process of choosing what carb to top off my motor with. My current build specs are.
Cam undecided either comp 260H or 268H.
Bored 30 over with silvolite 1138 pistons
C6AE-R heads if it matters
Stock 4bbl intake
1 3/4 headers 2.5 in exhaust
Auto trans 4:10 gears
I was thinking in the 700 cfm range. Any suggestions would be appreciated.
Thanks
Nick
Cam undecided either comp 260H or 268H.
Bored 30 over with silvolite 1138 pistons
C6AE-R heads if it matters
Stock 4bbl intake
1 3/4 headers 2.5 in exhaust
Auto trans 4:10 gears
I was thinking in the 700 cfm range. Any suggestions would be appreciated.
Thanks
Nick
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Senior User
Joined: Apr 2005
Posts: 453
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Yup its a 428, It nearly a pay check to paycheck money pit.
So far I have the following done.
16 new guides.
Hardened exhaust seats.
Resurfaced heads, and exhaust sides
Block bored 30 over
Crank was ground 10/10
Balanced with the weighted flywheel
Ordered the rebuild kit
I have yet to acquire.
Headers.
Cam kit with locks/springs blah blah blah still making up mind
Carburetor
Finish building my trans
Clean and paint parts
So far I have the following done.
16 new guides.
Hardened exhaust seats.
Resurfaced heads, and exhaust sides
Block bored 30 over
Crank was ground 10/10
Balanced with the weighted flywheel
Ordered the rebuild kit
I have yet to acquire.
Headers.
Cam kit with locks/springs blah blah blah still making up mind
Carburetor
Finish building my trans
Clean and paint parts
Posting Guru
Joined: Jul 2003
Posts: 1,287
Likes: 3
Yup its a 428, It nearly a pay check to paycheck money pit.
So far I have the following done.
16 new guides.
Hardened exhaust seats.
Resurfaced heads, and exhaust sides
Block bored 30 over
Crank was ground 10/10
Balanced with the weighted flywheel
Ordered the rebuild kit
I have yet to acquire.
Headers.
Cam kit with locks/springs blah blah blah still making up mind
Carburetor
Finish building my trans
Clean and paint parts
So far I have the following done.
16 new guides.
Hardened exhaust seats.
Resurfaced heads, and exhaust sides
Block bored 30 over
Crank was ground 10/10
Balanced with the weighted flywheel
Ordered the rebuild kit
I have yet to acquire.
Headers.
Cam kit with locks/springs blah blah blah still making up mind
Carburetor
Finish building my trans
Clean and paint parts
Tuned
Joined: Mar 2009
Posts: 360
Likes: 3
From: Napa
Well, matching the rods to the lightest one, and the same with the pistons, isn't really an "extra" to a balance job, it's the basics- all the rod/piston/ring assemblies matched, and that's your bobweight- then the crank/dampener/flywheel is balanced to the bobweight. Any rod bolt changes, polishing, clearancing, etc., should be done, then match the rods by machining on the balance pads- basic
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Exactly tonight I gathered all of my rotating parts so they can be dropped off at the making shop. I believe what the machinist said was that he is going to keep the weight on the flex plate.And just balance it that way.
Otherwise the other option I had was to go full internal using a internal balanced flex plate and adding weight to the crank, which is a little more expensive. I figured since this is a mild build and wont see high revs, keeping it external will be just fine.
Which doesn't really bother me as long as my whole rotating assembly is balanced correctly.
You don't happen to know off hand, the web site that has all of the casting numbers for FE heads, intakes, and blocks. It shows the original year and engine they were used on??????
Otherwise the other option I had was to go full internal using a internal balanced flex plate and adding weight to the crank, which is a little more expensive. I figured since this is a mild build and wont see high revs, keeping it external will be just fine.
Which doesn't really bother me as long as my whole rotating assembly is balanced correctly.
You don't happen to know off hand, the web site that has all of the casting numbers for FE heads, intakes, and blocks. It shows the original year and engine they were used on??????
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Posting Guru
Joined: Jul 2003
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Well, matching the rods to the lightest one, and the same with the pistons, isn't really an "extra" to a balance job, it's the basics- all the rod/piston/ring assemblies matched, and that's your bobweight- then the crank/dampener/flywheel is balanced to the bobweight. Any rod bolt changes, polishing, clearancing, etc., should be done, then match the rods by machining on the balance pads- basic
Tuned
Joined: Mar 2009
Posts: 360
Likes: 3
From: Napa
Exactly tonight I gathered all of my rotating parts so they can be dropped off at the making shop. I believe what the machinist said was that he is going to keep the weight on the flex plate.And just balance it that way.
Otherwise the other option I had was to go full internal using a internal balanced flex plate and adding weight to the crank, which is a little more expensive. I figured since this is a mild build and wont see high revs, keeping it external will be just fine.
Otherwise the other option I had was to go full internal using a internal balanced flex plate and adding weight to the crank, which is a little more expensive. I figured since this is a mild build and wont see high revs, keeping it external will be just fine.
Post Fiend
Joined: Mar 2004
Posts: 6,056
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From: Union, Washington
Exactly tonight I gathered all of my rotating parts so they can be dropped off at the making shop. I believe what the machinist said was that he is going to keep the weight on the flex plate.And just balance it that way.
Otherwise the other option I had was to go full internal using a internal balanced flex plate and adding weight to the crank, which is a little more expensive. I figured since this is a mild build and wont see high revs, keeping it external will be just fine.
Which doesn't really bother me as long as my whole rotating assembly is balanced correctly.
You don't happen to know off hand, the web site that has all of the casting numbers for FE heads, intakes, and blocks. It shows the original year and engine they were used on??????
Otherwise the other option I had was to go full internal using a internal balanced flex plate and adding weight to the crank, which is a little more expensive. I figured since this is a mild build and wont see high revs, keeping it external will be just fine.
Which doesn't really bother me as long as my whole rotating assembly is balanced correctly.
You don't happen to know off hand, the web site that has all of the casting numbers for FE heads, intakes, and blocks. It shows the original year and engine they were used on??????
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I suppose that this varies from person to person depending on their use and weight of foot, but I would set my limit at about around 4500.
I really have no clue I mean its not getting raced at all. I should just ask whats reasonable?? I want this to last a while and by a while I mean 15 maybe 20 years with reliability, unless I decided to place some more speed parts on it. So anything above the 4500 mark to me would seem that its a little excessive.
Although I'm not saying I'm setting a rev limiter at 4500 so testing the waters one toe at a time may happen.
I really have no clue I mean its not getting raced at all. I should just ask whats reasonable?? I want this to last a while and by a while I mean 15 maybe 20 years with reliability, unless I decided to place some more speed parts on it. So anything above the 4500 mark to me would seem that its a little excessive.
Although I'm not saying I'm setting a rev limiter at 4500 so testing the waters one toe at a time may happen.
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