Bought some Edelbrock Heads, Need Advice

NitroNixon · 01-27-2006, 09:48 AM

I just got a deal on a set of Edelbrock Heads for $400, the number reads #6025 under the valve covers and they are pedestal mount. The number on the front of the heads read, E.O. D-215-49. The intake ports look like they've been cleaned up alittle. I'm in the process of rebuilding a 88 HO 302 bottom end to go with these heads.

Can someone give me some info on these heads? What kind of pistons will I need to buy for the bottom end. I think I may switch over to a carb set up as well, but I'm still insure of this. Lastly which cam do you guys recommend for me. It's gonna be a weekend car and occasional drag strip.

Any advice would be appreciated.

Thanks.

Jeff Chambers · 01-27-2006, 12:36 PM

The 6025 heads are a normal Edelbrock Performer head. They're still a 20-degree inline Windsor head so no changes in your pistons are necessary. You should of course check piston-to-valve when you install the heads since P-V clearance is affecteed by the valve size, camshaft, rocker ratio and amount of milling done on the head/block.

NitroNixon · 01-27-2006, 12:47 PM

How do I check the piston to valve clearance?

Thanks for your input.

Gearhead999 · 01-27-2006, 03:44 PM

Mock up engine and put clay on top of piston. Turn by hand CAREFULLY, if you get resistance--STOP--. Then pull cyl. head and measure the thickness of the clay. You need about .100.

Or....put piston at TDC. Remove valve springs from valves. install head and measure how much the valve moves before touching piston. Subtract the cam lift, times the rocker arm ratio and you'll have clearence figure.

Jeff Chambers · 01-28-2006, 08:40 AM

The free-drop method isn't necessarily accurate, especially if the cam is advanced or retarded.

Use the clay method but you have to make sure that you use a solid roller to do it. I've taken a pair of hydraulics, disassembled them, flipped the internals and re-assembled. This makes them solid and perfect for checking cam/head installations. Remember to only take the slop out of the rockers when you use this method.

NitroNixon · 02-16-2006, 01:11 PM

Well I finally got my combo together but need help with a cam selection. Here's the comb so far:

Holley or Mighty Demon 650 DP
Typhoon Crosswind intake
Edelbrock Performer Heads
Crane 1.7 rockers
MSD Ignition
Centerforce Clutch
T5 Tranny
373 Gears

What cam do you all suggest, or do I need to change switch my 1.7 rockers for a set of 1.6 rockers?

NitroNixon · 02-21-2006, 11:10 AM

I bought a B-303 came over the weekend, and I'll keep the 1.7 roller rockers. I also found out that my edelbrock heads have the 1.94 intake valves, so I can keep my current bottom end as is. How does my combo sound?

01-27-2006, 09:48 AM	#1
NitroNixon Registered Member Join Date: Mar 2002 Location: DC Posts: 129	Bought some Edelbrock Heads, Need Advice I just got a deal on a set of Edelbrock Heads for $400, the number reads #6025 under the valve covers and they are pedestal mount. The number on the front of the heads read, E.O. D-215-49. The intake ports look like they've been cleaned up alittle. I'm in the process of rebuilding a 88 HO 302 bottom end to go with these heads. Can someone give me some info on these heads? What kind of pistons will I need to buy for the bottom end. I think I may switch over to a carb set up as well, but I'm still insure of this. Lastly which cam do you guys recommend for me. It's gonna be a weekend car and occasional drag strip. Any advice would be appreciated. Thanks. __________________ 87 GT As of 2/1/06 650 DP Carb Crosswind Intake Edelbrock Performer Heads 97 Explorer Bottomend w/ B-303 Cam 1.7 Roller Rockers Flowtech Longtube Headers Flowtech H-Pipe MSD Black Wires MSD ignition MSD Distributor Blaster 3 Coil Electric Fan Underdrive Pullies T5 Trans Hurst Shifter Lowered 1.5" 373 Gears

01-27-2006, 12:36 PM	#2
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Bought some Edelbrock Heads, Need Advice The 6025 heads are a normal Edelbrock Performer head. They're still a 20-degree inline Windsor head so no changes in your pistons are necessary. You should of course check piston-to-valve when you install the heads since P-V clearance is affecteed by the valve size, camshaft, rocker ratio and amount of milling done on the head/block. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

01-27-2006, 12:47 PM	#3
NitroNixon Registered Member Join Date: Mar 2002 Location: DC Posts: 129	Re: Bought some Edelbrock Heads, Need Advice How do I check the piston to valve clearance? Thanks for your input. __________________ 87 GT As of 2/1/06 650 DP Carb Crosswind Intake Edelbrock Performer Heads 97 Explorer Bottomend w/ B-303 Cam 1.7 Roller Rockers Flowtech Longtube Headers Flowtech H-Pipe MSD Black Wires MSD ignition MSD Distributor Blaster 3 Coil Electric Fan Underdrive Pullies T5 Trans Hurst Shifter Lowered 1.5" 373 Gears

01-27-2006, 03:44 PM	#4
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	Re: Bought some Edelbrock Heads, Need Advice Mock up engine and put clay on top of piston. Turn by hand CAREFULLY, if you get resistance--STOP--. Then pull cyl. head and measure the thickness of the clay. You need about .100. Or....put piston at TDC. Remove valve springs from valves. install head and measure how much the valve moves before touching piston. Subtract the cam lift, times the rocker arm ratio and you'll have clearence figure. __________________ "Support our Troops" Dave 1968 Cougar 2004 Thunderbird 2007 F150 Harley-Davidson, SuperCrew 1986 LTD 1997 Ranger 1992 Honda Civic

01-28-2006, 08:40 AM	#5
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Bought some Edelbrock Heads, Need Advice The free-drop method isn't necessarily accurate, especially if the cam is advanced or retarded. Use the clay method but you have to make sure that you use a solid roller to do it. I've taken a pair of hydraulics, disassembled them, flipped the internals and re-assembled. This makes them solid and perfect for checking cam/head installations. Remember to only take the slop out of the rockers when you use this method. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

02-16-2006, 01:11 PM	#6
NitroNixon Registered Member Join Date: Mar 2002 Location: DC Posts: 129	Re: Bought some Edelbrock Heads, Need Advice Well I finally got my combo together but need help with a cam selection. Here's the comb so far: Holley or Mighty Demon 650 DP Typhoon Crosswind intake Edelbrock Performer Heads Crane 1.7 rockers MSD Ignition Centerforce Clutch T5 Tranny 373 Gears What cam do you all suggest, or do I need to change switch my 1.7 rockers for a set of 1.6 rockers? __________________ 87 GT As of 2/1/06 650 DP Carb Crosswind Intake Edelbrock Performer Heads 97 Explorer Bottomend w/ B-303 Cam 1.7 Roller Rockers Flowtech Longtube Headers Flowtech H-Pipe MSD Black Wires MSD ignition MSD Distributor Blaster 3 Coil Electric Fan Underdrive Pullies T5 Trans Hurst Shifter Lowered 1.5" 373 Gears

02-21-2006, 11:10 AM	#7
NitroNixon Registered Member Join Date: Mar 2002 Location: DC Posts: 129	Re: Bought some Edelbrock Heads, Need Advice I bought a B-303 came over the weekend, and I'll keep the 1.7 roller rockers. I also found out that my edelbrock heads have the 1.94 intake valves, so I can keep my current bottom end as is. How does my combo sound? __________________ 87 GT As of 2/1/06 650 DP Carb Crosswind Intake Edelbrock Performer Heads 97 Explorer Bottomend w/ B-303 Cam 1.7 Roller Rockers Flowtech Longtube Headers Flowtech H-Pipe MSD Black Wires MSD ignition MSD Distributor Blaster 3 Coil Electric Fan Underdrive Pullies T5 Trans Hurst Shifter Lowered 1.5" 373 Gears

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