C90E vs E5TE

Reply Subscribe

Thread Tools

Search this Thread

Feb 28, 2008 | 01:27 PM

Handegard

Thread Starter

Elder User

Joined: Jun 2006

Posts: 654

Likes: 0

C90E vs E5TE

I have a set of each. I'll be using both, but I don't know which car to put which on.

Both sets are off a 302, btw.

The C9's have a smaller combustion chamber, I can see that right off the bat. But are there any other differences I should know about before deciding which go on my '69 Mustang and which go in my DD?

Feb 28, 2008 | 04:40 PM

HemiEater

Postmaster

Joined: Jun 2005

Posts: 2,656

Likes: 1

the E5s will have hardened exhaust seats...

Feb 28, 2008 | 04:49 PM

Handegard

Thread Starter

Elder User

Joined: Jun 2006

Posts: 654

Likes: 0

So, I know what that means, but not how it's benificial. More resistant the heat?

The E5s had the smog holes on the back too. Those were plugged when I got them.

I also have a set of heads out of a 1988 LTD. Not sure what they are, as they're still attached to the motor...

Feb 28, 2008 | 05:25 PM

baddad457

Hotshot

Joined: May 2003

Posts: 11,141

Likes: 25

From: south louisiana

The 88 LTD heads are dandy boat anchors. Good for bottom end torque, but not much else. E5TE's are the same head as the later E7TE. 64 cc chambers. If those C9OE's have 8 intake bolt holes and "L" shaped coolant ports, they're the "good" 351W heads with 1.84/1.54 valves and larger ports.

Feb 28, 2008 | 07:27 PM

ssidney

Senior User

Joined: Jan 2008

Posts: 440

Likes: 0

From: pg b.c

lead used to lube valve seats somewhat, with the advent of unleaded and alternate fuels alternate means of preserving valve seats became necessary

Feb 28, 2008 | 08:47 PM

Handegard

Thread Starter

Elder User

Joined: Jun 2006

Posts: 654

Likes: 0

AH! I remember that.

My grandfather told me he had the head's redone when he had headgaskets done, and he had it setup to run unleaded. I though he had said something about replacing the valves, but it's been awhile.

Feb 29, 2008 | 10:50 AM

Conanski

FTE Legend

Joined: Jun 2006

Posts: 31,930

Likes: 1,499

From: Ottawa, Ontario

For the mustang I bet you want more HP so whatever set you port will make more, and it's not hard to improve any of these casting with a carbide bit and some elbow grease.

Trending Topics

Bad trouble with axle shaft snap ring

28

419
This is prolly a 1 page thread at most

110.2k

6M
Truck slump

21

631
Brake upgrade worth it

22

451
What issues or upgrades actually made the biggest difference on your F150?

17

354

Feb 29, 2008 | 06:19 PM

HemiEater

Postmaster

Joined: Jun 2005

Posts: 2,656

Likes: 1

If it were me I would do the E7’s up…. They are pedestal mount so easy roller rocker install, no guide plates, no hardened push rods and no exhaust seats even if you go to a 1.60 exhaust valve. I opened my e7s to 1.94 1.60 valves the machinist said he was still in the factory induction hardness (or whatever they call it) when he was done… and after 3 years they are still holding up just fine…and the cost of cutting the seats and bowls to 1.94 1.60 is no more than a regular valve job. You would just need to buy the valves, spring, retainers, locks and roller rockers. Then port them, there is plenty of info out there on porting small block heads. You would be surprised how much of a difference it will make.

The e7’s would be the cheapest to do.