Can I use square ports on my 914?

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Eddie Brown
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Can I use square ports on my 914?

Post by Eddie Brown » Sun Jul 24, 2005 3:15 pm

Jake, I have a set of square port heads that need to be rebuilt for my intended motor for the 914. I think I'm going to go with a 96x78 since I have the crank and 93 cylinders already. Since stock 914 headers were made for oval ports, could I still use the heads by using the stock square port exhaust gaskets, or would i need to modify my headers by welding some square port exhaust flanges?.

I do have a set of 1.7 heads, but the ports seem to be quite restrictive in comparison...Either way, I'd like to have Len work on these heads when the time comes.

I also plan on adding a turbo to this motor, so would that be an impediment or advantage by using the square ports?

Thanks,

Eddie.

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Daniel G
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Post by Daniel G » Sun Jul 24, 2005 3:31 pm

You would have to modify the exhaust to use those heads. I'll be using square port heads in my rail until I get my new engine built, and I just cut the flanges off a a set of square port heater boxes to fab my exhaust with. I'll take a pic for you if you want so you can see the differences between the two styles an how they mount up. That might give you some ideas.

Daniel

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Eddie Brown
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Post by Eddie Brown » Sun Jul 24, 2005 3:53 pm

Thanks Daniel. I just took some pics of what i have to work with...

Square ports

Image

Image

1.7 heads

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Image

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Daniel G
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Post by Daniel G » Sun Jul 24, 2005 9:21 pm

Here are those pics I took for you...

Image

Image

Image

Image

Maybe these can give you a few ideas.

Daniel
Last edited by Daniel G on Mon Jul 25, 2005 1:43 pm, edited 1 time in total.

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Daniel G
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Post by Daniel G » Sun Jul 24, 2005 9:22 pm

Here are those pics I took for you...

Image

Image

Image

Image

Maybe these can give you a few ideas.

Daniel

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Eddie Brown
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Post by Eddie Brown » Mon Jul 25, 2005 12:43 am

Thanks for the pics Daniel. Looks like I definately have to get those flanges if I want to use those heads...


Eddie.

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Piledriver
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Post by Piledriver » Mon Jul 25, 2005 3:49 am

Looks like exactly the exhaust I'm cutting up...for the same reason.
I'm planning to convert my 2.0 914 exhaust to stubs so I could later switch to the original 2.0 heads.

Might want to scale those pics down before someone on dialup has kittens.
I, for one, regularly embrace our new robot overlords, as I am the guy fixing the robots...

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Daniel G
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Post by Daniel G » Mon Jul 25, 2005 12:58 pm

I made the pics smaller, so you dial up guys wouldn't want to kill me... :lol:

If you need me to take a pic of anything else, just let me know and I will take one for you.


Daniel

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Post by MASSIVE TYPE IV » Tue Jul 26, 2005 6:39 am

The real killer of the Square port OEM head was that it came in hydraulic busses and vanagons.... Best case scenario those vehicles weighed 4500 pounds.

Finding flawless USED square ports is a huge challenge- thats why Len and I gave up on them unless they were 100% new heads. Even the new heads need rebuilding out of the box.

The other thing to remember is that Square port development is very young and is still being explored with every day further and further. Len and I have found that the rules used when building the engine need to change a bit when using square ports.

HAM Inc
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Post by HAM Inc » Tue Jul 26, 2005 12:20 pm

Jakes 100% right about the used sq. ports. I won't touch them, or any used 2.0 bus heads (that includes ovals) anymore. Been burned to many times.

As for the 1.7 ex. being restrictive, they can be modified without to much trouble. You should see what our 1.8 F-Prod engine can do with a 34mm ex. valve!

What size engine are you planning? The ex. port won't be an issue , but the intakes MAY be, if you are going big on the cubes AND rpm's.

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Eddie Brown
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Post by Eddie Brown » Tue Jul 26, 2005 3:22 pm

Len wrote:

What size engine are you planning? The ex. port won't be an issue , but the intakes MAY be, if you are going big on the cubes AND rpm's.

Len, I'm planning a 2258cc (96x78) with 8.0:1 CR.. Turbo/EFI/Intercooled. I was thinking about a valve size of 44x38 with a .040" deck height, and a 119 Web cam. I don't want to rev it more than 6k rpms.

Thanks,

Eddie.

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Post by vrsechslvr » Tue Jul 26, 2005 3:49 pm

HAM Inc wrote:Jakes 100% right about the used sq. ports. I won't touch them, or any used 2.0 bus heads (that includes ovals) anymore. Been burned to many times.
Well CRAP, I was getting ready in the next few months to send you my 2.0 sq. port bus heads for rework. Now what will I do?

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Post by MASSIVE TYPE IV » Tue Jul 26, 2005 5:11 pm

Buy Lens heads through my store- based on NEW castings.

Many things are changing for Len and even my shop and thats including head prices. Every day it is becoming more expensive- just like gas, milk and bread...

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Post by HAM Inc » Wed Jul 27, 2005 10:59 am

Yes, everything is getting more expensive. My parts and supplies cost have been inching up for quite sometime now, yet my prices have been stable. I do everything I can to keep my prices affordable, but I refuse to use inferior parts, OR techiniques, OR to cut corners.

A little more up front spread over the life of a superior engine is peanuts compared to the cost of having to start over after less miles than the combo is capable of. Especially when performance is superior too.

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Eddie Brown
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Post by Eddie Brown » Thu Jul 28, 2005 4:43 pm

Len, am I better off using the 1.7 heads then?.

Thanks,

Eddie.

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