350 Top End Rebuild Time
Thread Starter
4th Gear
Joined: Sep 2011
Posts: 4
Likes: 0
350 Top End Rebuild Time
So, I bought a 74 L48 about 6 months ago and I am looking to do a good top end upgrade. I decided on a rebuild over a crate motor mainly because the guy I bought the car from had already replaced all the accessories and put a new carb and intake manifold on it. Plus, there is some nostalgic part of me that wants to breathe life into the old girl.
Having scoured through this forum and reading many threads on heads, cams, etc. I am thinking I want to take it into the direction of the thread below as my car is very similar.
http://forums.corvetteforum.com/c3-t...er-intake.html
To begin with, I have to keep the build under $2k if I want to stay married.
I already have an edl-1400 600cfm carb and an edl-3701 intake manifold that I'd really like to re-use as they have less than 1000 miles on them and it will help keep the cost down for other things.
My first question for you guys refers to the heads. I have been looking at the edelbrock e streets and performer rpm. I have also read good things about afr heads. In my base operating range, about 1200 to 3500 rpm, will I even get enough air flow to justify buying the afr's or would the best bang for the buck be to just stick to the edelbrocks?
Thanks in advance to everyone here and the wealth of knowledge on this forum.
Having scoured through this forum and reading many threads on heads, cams, etc. I am thinking I want to take it into the direction of the thread below as my car is very similar.
http://forums.corvetteforum.com/c3-t...er-intake.html
To begin with, I have to keep the build under $2k if I want to stay married.
I already have an edl-1400 600cfm carb and an edl-3701 intake manifold that I'd really like to re-use as they have less than 1000 miles on them and it will help keep the cost down for other things.
My first question for you guys refers to the heads. I have been looking at the edelbrock e streets and performer rpm. I have also read good things about afr heads. In my base operating range, about 1200 to 3500 rpm, will I even get enough air flow to justify buying the afr's or would the best bang for the buck be to just stick to the edelbrocks?
Thanks in advance to everyone here and the wealth of knowledge on this forum.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
brodix has been making aluminum heads for SBC chevies since 1971 long before edelbrock ever made one. Why don't you save yourself some money buy the IK180 if you want an aluminum head www.brodix.com
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
My first question for you guys refers to the heads. I have been looking at the edelbrock e streets and performer rpm. I have also read good things about afr heads. In my base operating range, about 1200 to 3500 rpm, will I even get enough air flow to justify buying the afr's or would the best bang for the buck be to just stick to the edelbrocks?
Modern heads have superior combustion chamber shapes compared to the garbage made in the 70's.
You would likely get better power output out of new heads, even if they didnt outflow the old ones.
As for the E-Streets, the combustion chamber is one of the areas where Edelbrock cut corners to keep the cost down.
The E-Street chamber looks a lot like a stock head from the 70's.
Compare them to a head from Brodix, Dart, or AFR and its easy to see the difference.
Thread Starter
4th Gear
Joined: Sep 2011
Posts: 4
Likes: 0
There is more to a good cylinder head than just airflow.
Modern heads have superior combustion chamber shapes compared to the garbage made in the 70's.
You would likely get better power output out of new heads, even if they didnt outflow the old ones.
As for the E-Streets, the combustion chamber is one of the areas where Edelbrock cut corners to keep the cost down.
The E-Street chamber looks a lot like a stock head from the 70's.
Compare them to a head from Brodix, Dart, or AFR and its easy to see the difference.
Modern heads have superior combustion chamber shapes compared to the garbage made in the 70's.
You would likely get better power output out of new heads, even if they didnt outflow the old ones.
As for the E-Streets, the combustion chamber is one of the areas where Edelbrock cut corners to keep the cost down.
The E-Street chamber looks a lot like a stock head from the 70's.
Compare them to a head from Brodix, Dart, or AFR and its easy to see the difference.
I'll see what summit has in stock. Thanks for the input.
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
If your trying to keep costs down its very hard to beat the Brodix IK180s.
http://www.jegs.com/i/Brodix/158/102...oductId=760699
http://www.jegs.com/i/Brodix/158/102...oductId=760699
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
AFRs cheapest 180 head costs $1488.99 flows 260 cfm at .500 lift. Brodix IK180 head costs $1055.00 flows 243 cfm at .500 lift. If you use the times two method afr can support 520 hp, brodix 486 hp. On your budget you will be at a hydraulic flat tappit mild cam that won't even reach the .500 lift point. My point is you don't need to spend almost exactly one third more money for the afr head for your mild 350 build.
Brodix has a solid reputation of building good heads from the most basic as cast IK180 to the all out racing world. www.brodix.com
Brodix has there own aluminum foundry just like edelbrock. IK180 looks to be as cast the afr has some CNC work for the $450.00 extra. Better think about what hp level your really after before just dropping $450.00 more that could be spent elsewhere or saved.
Brodix has a solid reputation of building good heads from the most basic as cast IK180 to the all out racing world. www.brodix.com
Brodix has there own aluminum foundry just like edelbrock. IK180 looks to be as cast the afr has some CNC work for the $450.00 extra. Better think about what hp level your really after before just dropping $450.00 more that could be spent elsewhere or saved.
Last edited by Little Mouse; Sep 21, 2011 at 04:53 PM.
Safety Car
Joined: Oct 2000
Posts: 3,593
Likes: 103
From: Southern Indiana
I have a set of World Torquers with 202/160s, 67cc im going to install in the late winter.
You can find them for around $800 and they include screw in studs and guide plates.
(PS) ditch the edelbrock carb and get a Holley.
You can find them for around $800 and they include screw in studs and guide plates.
(PS) ditch the edelbrock carb and get a Holley.
Last edited by Tim H; Sep 21, 2011 at 05:40 PM.
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Thread Starter
4th Gear
Joined: Sep 2011
Posts: 4
Likes: 0
AFRs cheapest 180 head costs $1488.99 flows 260 cfm at .500 lift. Brodix IK180 head costs $1055.00 flows 243 cfm at .500 lift. If you use the times two method afr can support 520 hp, brodix 486 hp. On your budget you will be at a hydraulic flat tappit mild cam that won't even reach the .500 lift point. My point is you don't need to spend almost exactly one third more money for the afr head for your mild 350 build.
Brodix has a solid reputation of building good heads from the most basic as cast IK180 to the all out racing world. www.brodix.com
Brodix has there own aluminum foundry just like edelbrock. IK180 looks to be as cast the afr has some CNC work for the $450.00 extra. Better think about what hp level your really after before just dropping $450.00 more that could be spent elsewhere or saved.
Brodix has a solid reputation of building good heads from the most basic as cast IK180 to the all out racing world. www.brodix.com
Brodix has there own aluminum foundry just like edelbrock. IK180 looks to be as cast the afr has some CNC work for the $450.00 extra. Better think about what hp level your really after before just dropping $450.00 more that could be spent elsewhere or saved.
I hadn't read much about brodix before, thanks for the info.
