Stupid Ignition Setup Questions
Thread Starter
Racer
Joined: May 2005
Posts: 462
Likes: 0
From: Tracy Ca
Stupid Ignition Setup Questions
Ok, first off, i accept the fact that im an idiot and these are stupid questions. Im redoing a 75. Its going to have a brand new base zz502 crate. Im definatly going with the Edelbrock Efi system. What should i do about the ignition? I want something totally electronic and controllable. I dont know much about these motors. I know a lot about newer import motors and such. Is there such a thing as a distributerless ignition setup? Can you guys help me out and maybe suggest all the parts i need. I dont need anything super fancy but something that will work with my setup.
Thanks guys.
Thanks guys.
Race Director
Joined: Nov 1999
Posts: 10,643
Likes: 8
From: Foxfield CO 1970 Convertible
It looks like Edelbrock kits come with the ignition included. Maybe that's just what you need, although it's not distributorless.
Edelbrock
The newer Vette engines like the LS1, LS2, LS6 are distributorless (DIS). GM sells them as crate motors, but they're small blocks - nothing as big as the 502. DIS systems are more complex and require special pieces for fitting on an engine like the 502. Many aftermarket ignition systems will work with DIS, but you'll need some extra parts to send the system a signal to tell it about the cam position since the stock type distributor doesn't know about it. MSD makes a lot of these parts. You'll also need a coil for each cylinder.
MSD
Here's a 502 equipped with the Edelbrock efi already installed.
Sallee
You'll also need to upgrade the fuel system to a high pressure system for efi. Usually this means a new electric fuel pump, regulator and new lines including a return system. There are a ton of fuel pumps and regulators out there.
'75s come with an electric tach, so you're in good shape there.
Last but not least, you'll need a place in the exhaust system to install the 02 sensor.
Good luck -
Edelbrock
The newer Vette engines like the LS1, LS2, LS6 are distributorless (DIS). GM sells them as crate motors, but they're small blocks - nothing as big as the 502. DIS systems are more complex and require special pieces for fitting on an engine like the 502. Many aftermarket ignition systems will work with DIS, but you'll need some extra parts to send the system a signal to tell it about the cam position since the stock type distributor doesn't know about it. MSD makes a lot of these parts. You'll also need a coil for each cylinder.
MSD
Here's a 502 equipped with the Edelbrock efi already installed.
Sallee
You'll also need to upgrade the fuel system to a high pressure system for efi. Usually this means a new electric fuel pump, regulator and new lines including a return system. There are a ton of fuel pumps and regulators out there.
'75s come with an electric tach, so you're in good shape there.
Last but not least, you'll need a place in the exhaust system to install the 02 sensor.
Good luck -
Last edited by Z-man; Sep 8, 2005 at 01:48 AM.
Race Director
Joined: Nov 1999
Posts: 10,643
Likes: 8
From: Foxfield CO 1970 Convertible
If you can get the flowrate of the pump (lb. per hour or gal per hour,etc.), you can calculate how much hp it will supply. Or, if you know the hp you want to make, you can calculate what size pump you need. Here's a site that shows calcs for fuel injectors and comes up with the flow rate. Your pump needs to be at least that big. Most pumps are rated at about 43-45 psi.
Calculations
Calculations
Drifting
Joined: Nov 2001
Posts: 1,469
Likes: 6
From: 68 427 4.11s Roadster
Ford EDIS. The http://www.megasquirt.info/index.html site mentions it under mega squirt II on the left column.
If your EFI don't have it but supports it seems a cheap and simple system to add.
If your EFI don't have it but supports it seems a cheap and simple system to add.
