The best top end set up for SBC 350
03-25-2009, 02:46 PM
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The best top end set up for SBC 350 I have a 1969 camaro with a sbc 350, 3.73 gears, TH350 trans. I am looking to swap out the TH350 to the TCI automatic 6 speed with paddle shifter. What is the best combination (heads, cam, intake, carb) for HP? I would like to get as much HP as I can while still having driveability on the street as well as kick some a$$ at the track. Can anyone suggest any manufacturers and part #'s if possible. I would like to see around the 400 to 500 Hp range
03-25-2009, 03:59 PM
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I would run the AFR 195cc intake runner heads with the Competition porting for your best top end head build or the Street porting for a budget build. As for the cam, were you wanting a flat tappet lifter or a roller lifter design? I would run a RPM Air-Gap intake over the Victor Jr., unless you plan on running a 175+ shot of n2o. I would run a 750 cfm carb from Quickfuel/AED/VDL Fuel System's/Demon/Holley for a 500 hp build, but a 650 cfm on the 400 hp side.
03-25-2009, 08:07 PM
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Heads http://cgi.ebay.com/ebaymotors/AFR-S...1%7C240%3A1318
Cam/lifters http://cgi.ebay.com/ebaymotors/LUNAT...1%7C240%3A1318
intake http://cgi.ebay.com/ebaymotors/EDELB...4506.m20.l1116
Carb http://www.cnc-motorsports.com/produ...031&CtgID=7742
Here is a link to AFR's website with some dyno numbers to give you an idea what you are going to make for power ( http://www.airflowresearch.com/store/chevy_dyno.php ). The heads that I gave you a link to are a much better head than what was used off of AFR's dyno results, due to the newer Eliminator port design and larger intake volume. The HR cam that was used in the 355 dyno results (second engine down) was a Comp 12-432-8 cam that is 230/236 @.050" duration, the cam that I linked for you is just a touch larger (231/239) and has a little more lift to it for your better flowing heads. This should easily get you to your 500 HP that you were looking for at the flywheel.
Cam/lifters http://cgi.ebay.com/ebaymotors/LUNAT...1%7C240%3A1318
intake http://cgi.ebay.com/ebaymotors/EDELB...4506.m20.l1116
Carb http://www.cnc-motorsports.com/produ...031&CtgID=7742
Here is a link to AFR's website with some dyno numbers to give you an idea what you are going to make for power ( http://www.airflowresearch.com/store/chevy_dyno.php ). The heads that I gave you a link to are a much better head than what was used off of AFR's dyno results, due to the newer Eliminator port design and larger intake volume. The HR cam that was used in the 355 dyno results (second engine down) was a Comp 12-432-8 cam that is 230/236 @.050" duration, the cam that I linked for you is just a touch larger (231/239) and has a little more lift to it for your better flowing heads. This should easily get you to your 500 HP that you were looking for at the flywheel.
Last edited by 1997bird; 03-25-2009 at 08:20 PM.
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03-25-2009, 09:01 PM
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Heads http://cgi.ebay.com/ebaymotors/AFR-S...1%7C240%3A1318
Cam/lifters http://cgi.ebay.com/ebaymotors/LUNAT...1%7C240%3A1318
intake http://cgi.ebay.com/ebaymotors/EDELB...4506.m20.l1116
Carb http://www.cnc-motorsports.com/produ...031&CtgID=7742
Here is a link to AFR's website with some dyno numbers to give you an idea what you are going to make for power ( http://www.airflowresearch.com/store/chevy_dyno.php ). The heads that I gave you a link to are a much better head than what was used off of AFR's dyno results, due to the newer Eliminator port design and larger intake volume. The HR cam that was used in the 355 dyno results (second engine down) was a Comp 12-432-8 cam that is 230/236 @.050" duration, the cam that I linked for you is just a touch larger (231/239) and has a little more lift to it for your better flowing heads. This should easily get you to your 500 HP that you were looking for at the flywheel.
Cam/lifters http://cgi.ebay.com/ebaymotors/LUNAT...1%7C240%3A1318
intake http://cgi.ebay.com/ebaymotors/EDELB...4506.m20.l1116
Carb http://www.cnc-motorsports.com/produ...031&CtgID=7742
Here is a link to AFR's website with some dyno numbers to give you an idea what you are going to make for power ( http://www.airflowresearch.com/store/chevy_dyno.php ). The heads that I gave you a link to are a much better head than what was used off of AFR's dyno results, due to the newer Eliminator port design and larger intake volume. The HR cam that was used in the 355 dyno results (second engine down) was a Comp 12-432-8 cam that is 230/236 @.050" duration, the cam that I linked for you is just a touch larger (231/239) and has a little more lift to it for your better flowing heads. This should easily get you to your 500 HP that you were looking for at the flywheel.
Ebay is tricky... $1500 will buy the normal ported, the Eliminators Comp port go for $2000'ish.. That ad SAYS they are eliminators but the price and MAINLY the part number of 1040 means they are the base head, not the eliminator. part number 1094 is the new head and will cost more. Goodluck!
I agree with the combo above but for a carb, always call Pro System's and have them build a custom carb for a killer price and a perfect tune right from the beginning...
03-25-2009, 09:36 PM
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Ebay is tricky... $1500 will buy the normal ported, the Eliminators Comp port go for $2000'ish.. That ad SAYS they are eliminators but the price and MAINLY the part number of 1040 means they are the base head, not the eliminator. part number 1094 is the new head and will cost more. Goodluck!
I agree with the combo above but for a carb, always call Pro System's and have them build a custom carb for a killer price and a perfect tune right from the beginning...
I agree with the combo above but for a carb, always call Pro System's and have them build a custom carb for a killer price and a perfect tune right from the beginning...
I'm with you on staying with the Competition series head and the custom carb! I'm a dealer for VDL Fuel System's and Dan does some fantastic work. He build's the restricted carb's for Braswell Carburation.
Here is a link for the Competition heads http://cgi.ebay.com/ebaymotors/AFR-S...1%7C240%3A1318
03-26-2009, 02:16 PM
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Heads http://cgi.ebay.com/ebaymotors/AFR-S...1%7C240%3A1318
Cam/lifters http://cgi.ebay.com/ebaymotors/LUNAT...1%7C240%3A1318
intake http://cgi.ebay.com/ebaymotors/EDELB...4506.m20.l1116
Carb http://www.cnc-motorsports.com/produ...031&CtgID=7742
Here is a link to AFR's website with some dyno numbers to give you an idea what you are going to make for power ( http://www.airflowresearch.com/store/chevy_dyno.php ). The heads that I gave you a link to are a much better head than what was used off of AFR's dyno results, due to the newer Eliminator port design and larger intake volume. The HR cam that was used in the 355 dyno results (second engine down) was a Comp 12-432-8 cam that is 230/236 @.050" duration, the cam that I linked for you is just a touch larger (231/239) and has a little more lift to it for your better flowing heads. This should easily get you to your 500 HP that you were looking for at the flywheel.
Cam/lifters http://cgi.ebay.com/ebaymotors/LUNAT...1%7C240%3A1318
intake http://cgi.ebay.com/ebaymotors/EDELB...4506.m20.l1116
Carb http://www.cnc-motorsports.com/produ...031&CtgID=7742
Here is a link to AFR's website with some dyno numbers to give you an idea what you are going to make for power ( http://www.airflowresearch.com/store/chevy_dyno.php ). The heads that I gave you a link to are a much better head than what was used off of AFR's dyno results, due to the newer Eliminator port design and larger intake volume. The HR cam that was used in the 355 dyno results (second engine down) was a Comp 12-432-8 cam that is 230/236 @.050" duration, the cam that I linked for you is just a touch larger (231/239) and has a little more lift to it for your better flowing heads. This should easily get you to your 500 HP that you were looking for at the flywheel.
03-26-2009, 11:14 PM
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Ebay is tricky... $1500 will buy the normal ported, the Eliminators Comp port go for $2000'ish.. That ad SAYS they are eliminators but the price and MAINLY the part number of 1040 means they are the base head, not the eliminator. part number 1094 is the new head and will cost more. Goodluck!
I agree with the combo above but for a carb, always call Pro System's and have them build a custom carb for a killer price and a perfect tune right from the beginning...
I agree with the combo above but for a carb, always call Pro System's and have them build a custom carb for a killer price and a perfect tune right from the beginning...
03-27-2009, 01:44 PM
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I would suggest a roller cam (conversion) with a good set of high flowing heads (with smallish intake ports to keep velocity high) and a Performer RPM intake (or similar).
Normally I would opt for ported L98 aluminum heads - but they only work with flat tops or dished pistons, but your older 350 will need something with a bigger chamber to keep compression reasonable (10:1 or a tad under). I would say a roller with say 220 @0.050" with as much lift as you can get (0.575") will be the ticket.
Normally I would opt for ported L98 aluminum heads - but they only work with flat tops or dished pistons, but your older 350 will need something with a bigger chamber to keep compression reasonable (10:1 or a tad under). I would say a roller with say 220 @0.050" with as much lift as you can get (0.575") will be the ticket.
03-27-2009, 06:44 PM
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I would suggest a roller cam (conversion) with a good set of high flowing heads (with smallish intake ports to keep velocity high) and a Performer RPM intake (or similar).
Normally I would opt for ported L98 aluminum heads - but they only work with flat tops or dished pistons, but your older 350 will need something with a bigger chamber to keep compression reasonable (10:1 or a tad under). I would say a roller with say 220 @0.050" with as much lift as you can get (0.575") will be the ticket.
Normally I would opt for ported L98 aluminum heads - but they only work with flat tops or dished pistons, but your older 350 will need something with a bigger chamber to keep compression reasonable (10:1 or a tad under). I would say a roller with say 220 @0.050" with as much lift as you can get (0.575") will be the ticket.
Those L98 heads have small runners and porting them will not get you close to enough intake runner to support 500 hp plus they are old technology compared to today's heads. In their day they were good heads, but not anymore.
03-28-2009, 01:43 AM
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03-28-2009, 05:04 AM
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I would suggest a roller cam (conversion) with a good set of high flowing heads (with smallish intake ports to keep velocity high) and a Performer RPM intake (or similar).
Normally I would opt for ported L98 aluminum heads - but they only work with flat tops or dished pistons, but your older 350 will need something with a bigger chamber to keep compression reasonable (10:1 or a tad under). I would say a roller with say 220 @0.050" with as much lift as you can get (0.575") will be the ticket.
Normally I would opt for ported L98 aluminum heads - but they only work with flat tops or dished pistons, but your older 350 will need something with a bigger chamber to keep compression reasonable (10:1 or a tad under). I would say a roller with say 220 @0.050" with as much lift as you can get (0.575") will be the ticket.
Last edited by 1997bird; 03-28-2009 at 05:09 AM.
03-28-2009, 11:10 AM
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That will never get him to his 500 hp goal. I just built a motor you stated with a single pattern 226 cam with 554 lift and a set of AFR's 195's and the car made 363 on the dyno which equates roughly to about 450 at the flywheel.
Those L98 heads have small runners and porting them will not get you close to enough intake runner to support 500 hp plus they are old technology compared to today's heads. In their day they were good heads, but not anymore.
Those L98 heads have small runners and porting them will not get you close to enough intake runner to support 500 hp plus they are old technology compared to today's heads. In their day they were good heads, but not anymore.
I'm a big fan of AFR heads - put together a 514hp 406 for a friend's IROC in 1994 - so they aren't all that new either.
Besides over camming a motor, the next biggest mistake people make is getting the wrong heads - either ones that flow too little (like base darts) or ones that have too big of an intake port on a small (under 406) motor. What good is 500hp if the car has nothing under 4000rpm?
03-28-2009, 11:13 AM
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Not to give you too hard of time on your thoughts here, but I dis-agree with you on several points. First off I did recommend a hyd roller cam/lifter set with a RPM Air-gap intake. Second, the L98 heads are terrible canidates for his performance build fully ported, as the AFR's would out flow them by .400" to .450" lift. Thirdly, he is wanting a cam that can support the rpm needed to make the HP goal, a lighter vehicle can use a slightly larger cam profile compaired to a heavier vehicle.