Suggestions before I order?
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Suggestions before I order?
390, pistons put me between 9.5 and 10.1-1 depending on chamber size (haven't accurately sized yet) all balanced
Headman 2.5" long tubes, 2.5" glass packs (each side) into a pair of 3" stacks
We're looking at ordering the following-
Edelbrock Performer RPM 7105
Comp Cams XE262H cam with matching springs/lifters and double roller chain
Dropping the heads off tomorrow for thorough port work (with a pro)
Valves are 2.02"/1.55"
I've got a MSD 6AL laying around which will either be fired via a Petronix kit or a MSD ready-to-run distributor
As-yet-undertermined carb, 650-750 cfm
Am I missing anything? My grandfather and I are going to have the coolest truck around....
Headman 2.5" long tubes, 2.5" glass packs (each side) into a pair of 3" stacks
We're looking at ordering the following-
Edelbrock Performer RPM 7105
Comp Cams XE262H cam with matching springs/lifters and double roller chain
Dropping the heads off tomorrow for thorough port work (with a pro)
Valves are 2.02"/1.55"
I've got a MSD 6AL laying around which will either be fired via a Petronix kit or a MSD ready-to-run distributor
As-yet-undertermined carb, 650-750 cfm
Am I missing anything? My grandfather and I are going to have the coolest truck around....
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From: Evanston, WY
Looks like a good all around package. If you are going to be doing heavy towing I might consider keeping the compression closer to the 9.5 than the 10 if it's possible. You are putting in a cam that's gonna make some cylinder pressure down low, I would hate to see you get into knock pulling up hills. In this engine there is probably less than 6hp difference between the two. Other than that, have fun!
-Brian
-Brian
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This truck is Grandpas Hot Rod. Not going to do any heavy work. According to CompCams little cam quest dyno I can have ~400hp/490ft-lbs, and while not 100% accurate, it gives me the a idea, and most intriguingly, ~400ft-lbs at 1000rpm...
Heads are laying on my front seat to get dropped off in the morning, I'm ordering from Summit right now, and I'll have all the parts and I'll finish the motor the 1st Thur/Friday of the month.
Next Thurs/Fri is going to be interior day. Got 3 huge boxes coming from LMC Truck.
Heads are laying on my front seat to get dropped off in the morning, I'm ordering from Summit right now, and I'll have all the parts and I'll finish the motor the 1st Thur/Friday of the month.
Next Thurs/Fri is going to be interior day. Got 3 huge boxes coming from LMC Truck.
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From: Evanston, WY
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Sure feels like it...
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From: Lost
I read thru your entire build thread earlier. Impressive, to say the least.
This should be a very good running, and great pulling engine when done. It's certainly making me want to get dad's truck finished, so I can enjoy the feeling of a torque monster 390 once again.
I agree with Sleepy. A 600-650 CFM carb should be all that's needed, unless you intend to wind this thing over 5K RPM. The smaller carb will actually help give better throttle response in the lower RPM range, too.
This should be a very good running, and great pulling engine when done. It's certainly making me want to get dad's truck finished, so I can enjoy the feeling of a torque monster 390 once again.
I agree with Sleepy. A 600-650 CFM carb should be all that's needed, unless you intend to wind this thing over 5K RPM. The smaller carb will actually help give better throttle response in the lower RPM range, too.
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