Hello,

I have some questions on porting the e88 head from my 240z.

To give you some context I live in Germany so buying a cylinder head that flows better wont be an option and I wont hand this work over to a Professional 😄

This will be my first time porting a car head but I have ported 2 stroke cylinders countless times.

My first question is: do I really need to remove the valves to port the runners or is it ok if I clean everything exceptionally well after the fact?

I am also wondering what/how much meterial to remove (besides the port matching).

The car is prabably getting a hotter cam a bit more compression and eventually triple 45mm weber carbs

Thanks in advance and greetings from Germany.

Elias

Hi,

You should remove the valves.  Cutting down the exhaust valve guide helps flow.

I'm using my phone now but have a lot more stuff on my laptop I can put up tomorrow. Here's some good stuff to look over from Kanga.

https://www.google.com/search?client=ms-android-americamovil-us-revc&source=android-home&source=hp&ei=6CanX5HnJMWb5wL-ib-IBA&q=how+to+modify+datsun+l+series+heads&oq=how+to+modify+datsun+l+&gs_lcp=ChFtb2JpbGUtZ3dzLXdpei1ocBABGAMyBQghEKABMgUIIRCgATIFCCEQoAEyBQghEKsCMgUIIRCrAjoECCkQCjoCCCk6BQgpEMkDOgkIKRDJAxAWEB46BwgpELEDEAo6BwgpELEDEEM6BwgpEMkDEAo6BQgAELEDOgIIADoICAAQsQMQgwE6BQgpEKABOgIILjoLCAAQsQMQgwEQyQM6BQgAEMkDOggIABCxAxDJAzoGCAAQFhAeOggIIRAWEB0QHlD1FVjk8gFgjpoCaABwAHgAgAG_AYgBrBWSAQQzLjIwmAEAoAEBsAEP&sclient=mobile-gws-wiz-hp

 

Thank you so much!

What a treasure trove of information that will really help me!

Some of those sections are quite interesting.

Some dont have much room on top

Do you know which sections are intake valves and which are exhaust?

This I always found a great read too ...

http://atlanticz.ca/zclub/techtips/headporting/index.htm

I can't add much more than what has been posted already. 

The book by Honsowetz is worth every penny.

https://www.amazon.com/Modify-Your-Nissan-Datsun-Engine-ebook/dp/B0092WMDCK

Then an older thread I found about turbulence in the intakes but that's also in the book.