What's the difference?

84_GT350 · 11-17-1999, 01:10 PM

Ok...I've spent my whole life around regular "pushrod" engines but this whole modular thing is pretty new to me. Would any of you be so kind as to fill me in on what the differnce is between the two engines? Thanks guys

Rebel79 · 11-17-1999, 01:58 PM

Well on the pushrod engines the cam is abouve the crank, but below the heads. Lifters sitting on the cam will push up the pushrods to open the valves.

The modular engine has an "overhead cam" which sits on top of the head. It pulls the valves open and closed.
The Cobra 4v Dual Over Head Cam (DOHC) enginehas two cams per head (one for intake & 1 for exhaust).

Also the 99 GT's do not have a fuel return line so there is no need for a Fuel Management Unit.

------------------
'94 Cobra
308ci, ported GT-40 heads, Ford cam .512" lift and 284° duration, 70mm TB, Custom 80mm MAF, JMS chip, Vortech S-trim 8#, MSD, TREX fuel pump, Accel coil, 3.55's, FMS 1 5/8 headers, BBK Offroad H-pipe, and 2-chamber flows.
1994 Mustang Cobra (UPDATED!)
Check out the pics of my Motor Buildup!

kg2hk · 11-17-1999, 02:29 PM

Modular motor makes its power at higher RPMs - the pushrod lower.

I was disappointed when I got my 4.6 because I thought that it had no power. Once I learned how to drive it that attitude changed. Don't be afraid to rev the snot out of it!

------------------
99 Laser Red GT
Mods: 70mm TB, Level 10 Chip, FMS 3.73's, Sean Hyland Speedo Recalibration kit, Pro 5.0 Shifter, & Pro-M 77mm MAF.
DynoJet: 242HP/286 Lb/ft
Best 1/4: 13.839@99.1MPH on radials.

84_GT350 · 11-17-1999, 08:27 PM

Wow...that's actually a lot more simple than I thought. Not bad. Maybe some day I'll consider a mod motored GT after I get rid of my '84 GT350. Have any of you guys seen the new information exchange plan from Ford? I'm sure that'll mean a lot more aftermarket parts for the 4.6L. I also hope they keep the 5.0L modular from the FR500. Thanks for the info guys.

Rebel79 · 11-18-1999, 02:05 AM

well 84GT350, in 2003 Ford will be putting in the 5.0l modular engine in the Cobra! So get used to it!

11-17-1999, 01:10 PM	#1
84_GT350 Registered Member Join Date: Apr 1999 Location: Overland Park, KS, USA Posts: 1,631	What's the difference? Ok...I've spent my whole life around regular "pushrod" engines but this whole modular thing is pretty new to me. Would any of you be so kind as to fill me in on what the differnce is between the two engines? Thanks guys

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11-17-1999, 01:58 PM	#2
Rebel79 News Editor Join Date: Apr 1999 Location: Concord, CA Posts: 2,101	Well on the pushrod engines the cam is abouve the crank, but below the heads. Lifters sitting on the cam will push up the pushrods to open the valves. The modular engine has an "overhead cam" which sits on top of the head. It pulls the valves open and closed. The Cobra 4v Dual Over Head Cam (DOHC) enginehas two cams per head (one for intake & 1 for exhaust). Also the 99 GT's do not have a fuel return line so there is no need for a Fuel Management Unit. ------------------ '94 Cobra 308ci, ported GT-40 heads, Ford cam .512" lift and 284° duration, 70mm TB, Custom 80mm MAF, JMS chip, Vortech S-trim 8#, MSD, TREX fuel pump, Accel coil, 3.55's, FMS 1 5/8 headers, BBK Offroad H-pipe, and 2-chamber flows. 1994 Mustang Cobra (UPDATED!) Check out the pics of my Motor Buildup!

11-17-1999, 02:29 PM	#3
kg2hk Registered Member Join Date: Oct 1999 Location: Stony Point. NY Posts: 18	Modular motor makes its power at higher RPMs - the pushrod lower. I was disappointed when I got my 4.6 because I thought that it had no power. Once I learned how to drive it that attitude changed. Don't be afraid to rev the snot out of it! ------------------ 99 Laser Red GT Mods: 70mm TB, Level 10 Chip, FMS 3.73's, Sean Hyland Speedo Recalibration kit, Pro 5.0 Shifter, & Pro-M 77mm MAF. DynoJet: 242HP/286 Lb/ft Best 1/4: 13.839@99.1MPH on radials.

11-17-1999, 08:27 PM	#4
84_GT350 Registered Member Join Date: Apr 1999 Location: Overland Park, KS, USA Posts: 1,631	Wow...that's actually a lot more simple than I thought. Not bad. Maybe some day I'll consider a mod motored GT after I get rid of my '84 GT350. Have any of you guys seen the new information exchange plan from Ford? I'm sure that'll mean a lot more aftermarket parts for the 4.6L. I also hope they keep the 5.0L modular from the FR500. Thanks for the info guys.

11-18-1999, 02:05 AM	#5
Rebel79 News Editor Join Date: Apr 1999 Location: Concord, CA Posts: 2,101	well 84GT350, in 2003 Ford will be putting in the 5.0l modular engine in the Cobra! So get used to it!