mtxpert

I am going to buy this truck this week, just working on deal on trading in on my motorcycle.

jcain

The block isn't the same

Joewee3.5

http://www.mustang50magazine.com/tec...turbo_install/

Although the hp numbers to the wheels are higher than any Ecoboost, the tq isn't even close. I'm sure a fully built 3.7 would be crazy revving to the moon with 20+ psi. Very curious what numbers you come up with. 800hp at 8000 rpm.

mtxpert

The block is the same, the bore isn't the same, worst case scenario I get a EB shortblock. I'm going to go with CP Carrillo rods and pistons for it anyhow, I can have them resize the pistons to match the bore and accomodate the differences. Lots of options on this one right now.
We're looking for around 800HP in the first iteration, I'll get to test some parts for Full-Race and see what we can do in this platform.

engineermike

Joewee, thanks for the link.

I've always said the 3.7 has something the 3.5 doesn't. The stock eb runs about 12 psi but only gained 60 rwhp over the 3.7. If you do the math, the eb naturally aspirated is around 240 hp. The higher rpm range of the 3.7 also demonstrates better breathing. So, the 3.7 has a 65 hp head start, which compounds to 130 hp at 15 psi boost.

The hellion turbo 3.7 further proves this, because it made 440 rwhp at only 8 psi boost. The eb is only making 370 rwhp at 18 psi boost. The higher torque number of the tuned eb's is simply due to the much higher boost levels. 15 psi on the 3.7 should get you well over 500 rwhp.

I've said for years that the eb would gain big power if you could retrofit some 3.7 cams into it.

jcain

Last I read was the eco block was one off build with more robust caps and 6 bolt mains

jcain

Same block it seems. Good stuff.
http://en.m.wikipedia.org/wiki/Ford_EcoBoost_engine

13'TwinScrew

what is the main difference between the cams for the 3.7L and EB? It would seem that if it's just grinds then that would be easy to simulate (I'm guessing that the fuel issue would still arise--meaning we would still need some more fuel).

engineermike

My educated guess is that the 3.7 cams have more duration. Note that variable cam timing can only change centerline, not duration.

I don't think the 3.7 cams will drop in, though, because somebody pointed out they wont have the fuel pump drive on them. And, yes, adding 60+ hp with cams will require more fuel that the di system can not supply. That's the beauty of switching to the 3.7's port efi system. Huge injectors and pumps are available all day long.

In all fairness, part of the eb's rpm limitation comes from the undersized turbos.

jcain

Yep, if the eb humped up top there'd be some lag down low and 98% of the consumers would say the truck was a turd and "slow"... And then the factory could counter it with a looser tc and then people would say their trans was slipping or some other ignorant comment