Need Cam Advice
Thread Starter
Instructor
Joined: Oct 2008
Posts: 121
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From: Hooksett NH
Need Cam Advice
I have called CompCams, Lunati, & Crower. Everytime I call and talk to a different person I get a different cam recommendation. Here is what I am planning for a top end build:
Edelbrock Performer heads (64cc. 170cc) on my L-48 stock short block. I'm shooting for 9.5:1 compression w/ a .018" head gasket and a quench of about .043" with 3.08 gears and stock converter.
I'm undecided between Comp. XE256H or XE262H or
Lunati Voodoo 256 or 262 that has more lift, and less overlap.
I know the 256's will give me more torque down low, but I don't want a truck for towing. I'm concerned that the 262's will not give me enough low end torque with the 3.08 rear end. I am looking to wake-up my 165hp. 1975 Corvette and make it a fun driver. Does anyone have a similar set-up or any experiance that can help. Thanks in advance. Bruce
Edelbrock Performer heads (64cc. 170cc) on my L-48 stock short block. I'm shooting for 9.5:1 compression w/ a .018" head gasket and a quench of about .043" with 3.08 gears and stock converter.
I'm undecided between Comp. XE256H or XE262H or
Lunati Voodoo 256 or 262 that has more lift, and less overlap.
I know the 256's will give me more torque down low, but I don't want a truck for towing. I'm concerned that the 262's will not give me enough low end torque with the 3.08 rear end. I am looking to wake-up my 165hp. 1975 Corvette and make it a fun driver. Does anyone have a similar set-up or any experiance that can help. Thanks in advance. Bruce
Last edited by Roarinbear; Feb 21, 2009 at 05:27 PM. Reason: spelling error
Racer
Joined: Mar 2007
Posts: 306
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From: New Hampshire
Since your using Eldebock heads, why not get their compete package. Everything matched up to work together. From the description, it seems your going to keep the original exhaust? Don't forget, more air in/more air out for good performance.
Melting Slicks
Joined: Mar 2006
Posts: 2,465
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From: Orange Park Fl
Don't go lower than the xe262! You have a Vette, not a truck! I have an XE 262 that I want to replace some day with a roller cam, but I will go larger if anything. With the 262, a 700r4 tranny and 2.87:1 rear gears, I can spin the rear tires at will (no shortage of torque).
God bless, Sensei
God bless, Sensei
Instructor
Joined: Apr 2007
Posts: 177
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From: Collierville TN
I ran Summit's 1104 cam in my '74 L48 for about a year before I got my 383. Its worth considering for half the price of the Comp.
http://store.summitracing.com/partde...4&autoview=sku
http://store.summitracing.com/partde...4&autoview=sku
Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
Don't go lower than the xe262! You have a Vette, not a truck! I have an XE 262 that I want to replace some day with a roller cam, but I will go larger if anything. With the 262, a 700r4 tranny and 2.87:1 rear gears, I can spin the rear tires at will (no shortage of torque).
God bless, Sensei
God bless, Sensei
The XE 262 will work fine with your gearing. Headers and a good dual exhaust system too!
Last edited by 63mako; Feb 21, 2009 at 09:36 PM.
Abby Normal
Joined: Dec 2001
Posts: 53,207
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From: Press "2" for English
if you're shooting for a 9.5CR i would think a 262 would be the smallest you should go with. but i'm also really confused with the head selection. i think a 190cc head would do you better.
i'm going out on a limb here but my suggestion would be as follows:
performer 190cc heads
performer manifold
comp cams 268HE or 270XE cam
650cfm carb.
i have no idea how to deal with a transmission that does it's own thing. corvettes shouldn't shift for themselves.
i'm going out on a limb here but my suggestion would be as follows:
performer 190cc heads
performer manifold
comp cams 268HE or 270XE cam
650cfm carb.
i have no idea how to deal with a transmission that does it's own thing. corvettes shouldn't shift for themselves.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
If you don't need the heat crossover the edelbrock heads have
the brodix IK180 is cheaper in cost a better head on airflow.
Brodix made its first aluminum head in 1969.
BRO-1021004 = $1025.00
www.summitracing.com
the brodix IK180 is cheaper in cost a better head on airflow.
Brodix made its first aluminum head in 1969.
BRO-1021004 = $1025.00
www.summitracing.com
Last edited by Little Mouse; Feb 22, 2009 at 12:25 AM.
Thread Starter
Instructor
Joined: Oct 2008
Posts: 121
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From: Hooksett NH
I was looking at the Brodix IK180cc, but I went to the Performer for the 170cc runners for faster airflow. ??? With the 12cc dished pistons. If the 180cc intake runners aren't to large for my short block I'll go with them.
I have true duals 2 1/2 to Magnaflows. 2'' connector, and I'm looking at shorty headers. I'm also looking at the Perforomer RPM intake. (Some say it will fit under the stock hood.)
I have true duals 2 1/2 to Magnaflows. 2'' connector, and I'm looking at shorty headers. I'm also looking at the Perforomer RPM intake. (Some say it will fit under the stock hood.)
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Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
If you don't need the heat crossover the edelbrock heads have
the brodix IK180 is cheaper in cost a better head on airflow.
Brodix made its first aluminum head in 1969.
BRO-1021004 = $1025.00
www.summitracing.com
the brodix IK180 is cheaper in cost a better head on airflow.
Brodix made its first aluminum head in 1969.
BRO-1021004 = $1025.00
www.summitracing.com
The IK 180 is a great 350 head. Probably the best value available. Not too big.
Instructor
Joined: Apr 2007
Posts: 177
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From: Collierville TN
I agree on the Brodix heads--I have IK200s on my 383. However, you really don't want to put that kind of money into an L48 because its never going to be the engine you really want. Go with a nice budget upgrade and save as much money as you can for a new motor.
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
What is that supposed to mean? He's not looking to make more than 9.5:1 compression, which is obtainable with the dished pistons, and the two-bolt mains will be fine for his power needs, same with the cast bottom end. Its alot less money than buying a completely new bottom end, not to mention all the work in putting it all together.
Thread Starter
Instructor
Joined: Oct 2008
Posts: 121
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From: Hooksett NH
Any comments on the Lunati Voodoo 60102 - 262/268 it has less overlap than the XE262H (more torque, more idle vacuum) Will it be safe with the stock converter? Also I think I will need heat crossover on the heads up here, In The Great White North! I don't think Spring will ever come.
Melting Slicks
Joined: Mar 2006
Posts: 2,465
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From: Orange Park Fl
Abby Normal
Joined: Dec 2001
Posts: 53,207
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From: Press "2" for English
Drifting
Joined: Aug 2005
Posts: 1,682
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From: League City TX
Any comments on the Lunati Voodoo 60102 - 262/268 it has less overlap than the XE262H (more torque, more idle vacuum) Will it be safe with the stock converter? Also I think I will need heat crossover on the heads up here, In The Great White North! I don't think Spring will ever come.
Dont write them off just because Lunati gave them a silly name.
They were designed specifically to compete with Comp's XE cams, and if you can believe the cam designer they consistantly beat them on the dyno.
Instructor
Joined: Apr 2007
Posts: 177
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From: Collierville TN
It means exactly what it says.
You can spruce up an L48 with a set of Summit 67cc heads and a Summit cam for under $750 the last time I checked. Putting much more than that into an L48 really doesn't make much sense because its never going to be a particularly fun engine. My suggestion to the OP is to look for good parts at minimal price and save up towards an engine upgrade--I make this suggestion because it is exactly the situation I was in when I got my car 2 years ago and I wish I had put less $ into the L48 before I made the decision to replace it.
Its up the OP to decide what the best approach is for him, but the suggestion remains.
You can spruce up an L48 with a set of Summit 67cc heads and a Summit cam for under $750 the last time I checked. Putting much more than that into an L48 really doesn't make much sense because its never going to be a particularly fun engine. My suggestion to the OP is to look for good parts at minimal price and save up towards an engine upgrade--I make this suggestion because it is exactly the situation I was in when I got my car 2 years ago and I wish I had put less $ into the L48 before I made the decision to replace it.
Its up the OP to decide what the best approach is for him, but the suggestion remains.
Instructor
Joined: Apr 2007
Posts: 177
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From: Collierville TN
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
I was looking at the Brodix IK180cc, but I went to the Performer for the 170cc runners for faster airflow. ??? With the 12cc dished pistons. If the 180cc intake runners aren't to large for my short block I'll go with them.
I have true duals 2 1/2 to Magnaflows. 2'' connector, and I'm looking at shorty headers. I'm also looking at the Perforomer RPM intake. (Some say it will fit under the stock hood.)
I have true duals 2 1/2 to Magnaflows. 2'' connector, and I'm looking at shorty headers. I'm also looking at the Perforomer RPM intake. (Some say it will fit under the stock hood.)
Get the best airflow you can in the heads with runners reasonable in size for your money.
Last edited by Little Mouse; Feb 23, 2009 at 12:56 PM.
Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
Look at things this way AFR for the most part people believe they have the best airflow in street heads they don't even bother to make a 170 runner head neither does brodix, you know both afr and brodix want to sell plenty of heads for 350 chevies and they don't expect them all to be hot cammed upper rpm engine builds. Your going to spend around $125.00 more for an inferior head to the brodix. Edelbrock has a huge advertising bill to pay that brodix does not have.
Get the best airflow you can in the heads with runners reasonable in size for your money.
Get the best airflow you can in the heads with runners reasonable in size for your money.
That is why I bought AFR 195's. Buy the head you will use on your future build now. Spend an extra $300 now and you won't need to buy another set when you upgrade later. The AFR 195 eliminators are a good choice for a 383 or HR 406. The Performer RPM manifold will neck these down a little to maintain A/F velocity for bottom end. The AFR 195 head has a port size of 1.28 x 2.09 The RPM intake has a port size of 1.16 x 1.92. When you do your future build just upgrade springs, Port match the intake or buy one with better flow. Bet you won't lose a bit of power or torque at the bottom end with these heads, intake and small cam. Might even do better, and it will definitly pull harder at the top. Gkull runs a dyno for a living and ran monster port heads on his 355. I think 210's.
Last edited by 63mako; Feb 23, 2009 at 02:00 PM.