Combustion chamber comparison

General engine tech -- Drag Racing to Circle Track

Moderator: Team

PRH
Guru
Guru
Posts: 1501
Joined: Fri Sep 08, 2017 4:16 pm
Location: S. Burlington, Vt.

Re: Combustion chamber comparison

Post by PRH »

I might have to check with one of the other shops in town to see if they have any of those E7 heads kicking around.

I’m somewhat curious to see what my “the most for the least” approach would yield for numbers.
Somewhat handy with a die grinder.
travis
Guru
Guru
Posts: 1611
Joined: Sun Mar 15, 2009 5:31 am
Location:

Re: Combustion chamber comparison

Post by travis »

PRH wrote: Sun Sep 22, 2019 11:41 pm I might have to check with one of the other shops in town to see if they have any of those E7 heads kicking around.

I’m somewhat curious to see what my “the most for the least” approach would yield for numbers.
Find some E5AEs (not the other E5’s). They are more challenging if you don’t want to hit water in the bowl :lol:
PRH
Guru
Guru
Posts: 1501
Joined: Fri Sep 08, 2017 4:16 pm
Location: S. Burlington, Vt.

Re: Combustion chamber comparison

Post by PRH »

I don’t see myself messing with the E5’s........ unless:
A- I had already messed with the E7 head a little
B- there happened to be an E5 head sitting here
C- I really had nothing else to do
Somewhat handy with a die grinder.
travis
Guru
Guru
Posts: 1611
Joined: Sun Mar 15, 2009 5:31 am
Location:

Re: Combustion chamber comparison

Post by travis »

DAD71211-D3D0-4954-B632-487F9F61D5B0.jpeg

I did a little work to the chamber...think it will be better now? :mrgreen:
You do not have the required permissions to view the files attached to this post.
PRH
Guru
Guru
Posts: 1501
Joined: Fri Sep 08, 2017 4:16 pm
Location: S. Burlington, Vt.

Re: Combustion chamber comparison

Post by PRH »

Must be that Speedmaster sale was too good to pass up.

Should make that 1hp/ci now. 8)

Will they receive a little whittling?
Somewhat handy with a die grinder.
travis
Guru
Guru
Posts: 1611
Joined: Sun Mar 15, 2009 5:31 am
Location:

Re: Combustion chamber comparison

Post by travis »

PRH wrote: Fri Sep 27, 2019 5:33 pm Must be that Speedmaster sale was too good to pass up.

Should make that 1hp/ci now. 8)

Will they receive a little whittling?
It’s a Promaxx 9175...summit had them on sale plus another $50 off for some promotion they are running. Comparing the price of these vs guides, a few valves, machine work, valvetrain, etc on the iron heads...it was pretty much a no brainer at this point. And...these should make a wee bit more power.
I’m going to try to run these across Gary’s flow bench this weekend. I’m not planning on whittling on these any but that kind of depends on what they flow. If they flow close to advertised, they won’t need any additional porting.
Carnut1
Guru
Guru
Posts: 4659
Joined: Tue Jun 11, 2013 6:32 pm
Location: Melbourne fl.

Re: Combustion chamber comparison

Post by Carnut1 »

travis wrote: Fri Sep 27, 2019 5:52 pm
PRH wrote: Fri Sep 27, 2019 5:33 pm Must be that Speedmaster sale was too good to pass up.

Should make that 1hp/ci now. 8)

Will they receive a little whittling?
It’s a Promaxx 9175...summit had them on sale plus another $50 off for some promotion they are running. Comparing the price of these vs guides, a few valves, machine work, valvetrain, etc on the iron heads...it was pretty much a no brainer at this point. And...these should make a wee bit more power.
I’m going to try to run these across Gary’s flow bench this weekend. I’m not planning on whittling on these any but that kind of depends on what they flow. If they flow close to advertised, they won’t need any additional porting.
I have seen one of those. It didn't look bad at all.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
travis
Guru
Guru
Posts: 1611
Joined: Sun Mar 15, 2009 5:31 am
Location:

Re: Combustion chamber comparison

Post by travis »

Carnut1 wrote: Fri Sep 27, 2019 6:14 pm I have seen one of those. It didn't look bad at all.
It is actually a very nice casting...the finish and detail is as nice as anything I’ve ever seen and certainly better than a lot of the lower end heads I’ve seen. The E5AE’s will still get used but on something more appropriate.

Here is some pics with a felpro 1262...
AFA979F0-8AA8-4B59-8C7E-489C11C115F7.jpeg
431FE857-FCD8-4B3A-8DAB-A1C1F62DA234.jpeg
You do not have the required permissions to view the files attached to this post.
PRH
Guru
Guru
Posts: 1501
Joined: Fri Sep 08, 2017 4:16 pm
Location: S. Burlington, Vt.

Re: Combustion chamber comparison

Post by PRH »

If they flow anything even close to the advertised numbers, 400-450hp should be “no problemo”(with the right combo of parts, of course).
Somewhat handy with a die grinder.
Carnut1
Guru
Guru
Posts: 4659
Joined: Tue Jun 11, 2013 6:32 pm
Location: Melbourne fl.

Re: Combustion chamber comparison

Post by Carnut1 »

I didn't test it but I think they flowed about 250/150.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
GARY C
HotPass
HotPass
Posts: 6301
Joined: Tue May 14, 2013 10:58 pm
Location:

Re: Combustion chamber comparison

Post by GARY C »

travis wrote: Fri Sep 27, 2019 5:52 pm
PRH wrote: Fri Sep 27, 2019 5:33 pm Must be that Speedmaster sale was too good to pass up.

Should make that 1hp/ci now. 8)

Will they receive a little whittling?
It’s a Promaxx 9175...summit had them on sale plus another $50 off for some promotion they are running. Comparing the price of these vs guides, a few valves, machine work, valvetrain, etc on the iron heads...it was pretty much a no brainer at this point. And...these should make a wee bit more power.
I’m going to try to run these across Gary’s flow bench this weekend. I’m not planning on whittling on these any but that kind of depends on what they flow. If they flow close to advertised, they won’t need any additional porting.
I have extra epoxy we can fix em up... :)
Please Note!
THE ABOVE POST IN NO WAY REFLECTS THE VIEWS OF SPEED TALK OR IT'S MEMBERS AND SHOULD BE VIEWED AS ENTERTAINMENT ONLY...Thanks, The Management!
My427stang
Expert
Expert
Posts: 908
Joined: Fri Sep 09, 2005 11:04 pm
Location: Omaha, NE
Contact:

Re: Combustion chamber comparison

Post by My427stang »

I see you went with a better head, which is better LOL duh, but I would have run the open one if you had supporting parts, us FE guys have to make do with some crappy chambers, especially early iron!

The trick would be to have a nice tight quench, .040-.045, even if you have to go proud, and a piston with a quench pad that matches that head. I certainly would love to have two quench pads in the chamber to keep things racing around, but if you ever look at an FE, we have to deal with one pad on one side and a goofy little step near the spark plug that you can't even really build a piston to match. They do fine with some thinking, and usually end up with a little more timing 36-38 but it's also a bigger bore.
Bullock's Power Service, LLC
Plattsmouth, NE
70 Mustang, 489 FE, TKO-600, Massflo SEFI, 4.11s
71 F100 SB 4x4, 461 FE, 4 speed, port injected EFI, 3.50s
travis
Guru
Guru
Posts: 1611
Joined: Sun Mar 15, 2009 5:31 am
Location:

Re: Combustion chamber comparison

Post by travis »

Carnut1 wrote: Fri Sep 27, 2019 9:17 pm I didn't test it but I think they flowed about 250/150.
I hope they do better than 150 on the exhaust. I got that out of my D0OE’s with 15 minutes of work and a 1.50 valve!
Carnut1
Guru
Guru
Posts: 4659
Joined: Tue Jun 11, 2013 6:32 pm
Location: Melbourne fl.

Re: Combustion chamber comparison

Post by Carnut1 »

travis wrote: Sat Sep 28, 2019 2:58 pm
Carnut1 wrote: Fri Sep 27, 2019 9:17 pm I didn't test it but I think they flowed about 250/150.
I hope they do better than 150 on the exhaust. I got that out of my D0OE’s with 15 minutes of work and a 1.50 valve!
I hope you get to flow them. I am just thinking back and those are the numbers I was told. I would at least do a bowl blend.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
User avatar
af2
Guru
Guru
Posts: 7014
Joined: Sun Jan 28, 2007 4:42 pm
Location: Grass Valley, CA :Northern Foothills

Re: Combustion chamber comparison

Post by af2 »

Can somebody explain to me why you would hope for 150 cfm on the exhaust port and not even talk about the intake?
GURU is only a name.
Adam
Post Reply