Jump to content


Photo
- - - - -

05L head use


  • Please log in to reply
14 replies to this topic

#1 fraz

fraz

    Junior Member

  • Members
  • PipPipPip
  • 53 posts
  • LocationNZ

Posted 18 April 2017 - 01:40 PM

I have a few 05L heads from the l20et that I was hoping to use for an l28.

I will cut 1 of them up to see how much material there is in the port walls.
Is it worth cutting every port? I put cylinder 6 through the bandsaw this morning and it looks promising.

#2 WhitleyTune

WhitleyTune

    Newbie

  • Members
  • Pip
  • 23 posts
  • LocationLittle River, New Zealand

Posted 18 April 2017 - 03:05 PM

I'd say just one cut each through an inlet and exhaust port will give you a good idea of how much material can be removed. If you are going 10/10ths then you could do the lot, but you'd probably be better investing in a good sonic thickness tester in that case. 

 

Any chance you could put some photos up? Have a few 05L heads myself here. 



#3 fraz

fraz

    Junior Member

  • Members
  • PipPipPip
  • 53 posts
  • LocationNZ

Posted 18 April 2017 - 03:43 PM

Yip I will put some photos up when I have some more free time.

#4 fraz

fraz

    Junior Member

  • Members
  • PipPipPip
  • 53 posts
  • LocationNZ

Posted 19 April 2017 - 10:32 PM

yknlncys.jue.jpg

#5 fraz

fraz

    Junior Member

  • Members
  • PipPipPip
  • 53 posts
  • LocationNZ

Posted 19 April 2017 - 10:39 PM

dkab0op3.asq.jpg

#6 fraz

fraz

    Junior Member

  • Members
  • PipPipPip
  • 53 posts
  • LocationNZ

Posted 19 April 2017 - 10:43 PM

Cylinder 6 exhaust
vwnvjmw4.gq2.jpg
edk4q30k.wgk.jpg

#7 fraz

fraz

    Junior Member

  • Members
  • PipPipPip
  • 53 posts
  • LocationNZ

Posted 19 April 2017 - 10:44 PM

Cylinder 6 inlet
tbq44grs.li1.jpg
afxmwg1o.mze.jpg

#8 fraz

fraz

    Junior Member

  • Members
  • PipPipPip
  • 53 posts
  • LocationNZ

Posted 21 April 2017 - 01:02 AM

sorry photos are currently a bit average. i posted them from my phone. Will delete them next week and re-post some better ones.

 

I measured the chamber at around 37cc, which will probably end up being maybe 40 with some bigger valves fitted and some de-shrouding

I want to put it on a l28 with +030 flat tops. On the various compression ratio calculators i get around 10.5:1 

We have 95 and 98 octane fuel available locally which is equivalent to 91 and 94 US octane. 

 

I should be ok for knock with a mild cam right?



#9 WhitleyTune

WhitleyTune

    Newbie

  • Members
  • Pip
  • 23 posts
  • LocationLittle River, New Zealand

Posted 23 April 2017 - 01:57 PM

Cool, thanks for that. Looks to be plenty wall thickness for the larger valves. Will you have to put new seat inserts in or are they large enough to fit the L28 valve sizes? 

 

Knock wise you will be fine at 10.5:1 with a mild cam on our 95/98 pump gas. The chambers on the 05L have a decent amount of squish so you won't have the issues that a 10.5:1 N42 would have. 

 

Good luck! Interested to see how you go, the 05L seems a good starting point for a nice head to me. 



#10 fraz

fraz

    Junior Member

  • Members
  • PipPipPip
  • 53 posts
  • LocationNZ

Posted 23 April 2017 - 08:15 PM

fv3vrm3y.byl.jpg
q0oumyg2.thu.jpg
wnxdii2h.xuu.jpg
plajyn0q.ld2.jpg

#11 fraz

fraz

    Junior Member

  • Members
  • PipPipPip
  • 53 posts
  • LocationNZ

Posted 23 April 2017 - 08:19 PM

Cool, thanks for that. Looks to be plenty wall thickness for the larger valves. Will you have to put new seat inserts in or are they large enough to fit the L28 valve sizes?

Knock wise you will be fine at 10.5:1 with a mild cam on our 95/98 pump gas. The chambers on the 05L have a decent amount of squish so you won't have the issues that a 10.5:1 N42 would have.

Good luck! Interested to see how you go, the 05L seems a good starting point for a nice head to me.


Would say I will have to get new valve seats. Can't remember the measurements.

You're in chch? I'm down there a couple of times a year, I can post you a cylinder of pieces if your interested.
Somebody told me you had a flow bench too?

#12 WhitleyTune

WhitleyTune

    Newbie

  • Members
  • Pip
  • 23 posts
  • LocationLittle River, New Zealand

Posted 25 April 2017 - 03:07 PM

Just did a quick measure from the photos and looks like the seat diameter is around 42mm so yeah needs new seats. Heaps of meat in there though so should be a good thing. 

 

Yeah I am in Christchurch. I don't have a flowbench myself but have access to one. Would like to see a couple pieces! No stress though, only if you can be bothered sending them. 



#13 Tony D

Tony D

    Wiki D

  • Donating Members
  • PipPipPipPipPipPipPipPipPip
  • 9973 posts
  • LocationReno NV & Lucena Quezon, Philippines

Posted 28 April 2017 - 05:23 PM

My understanding from the Japanese I'd talked to is the O5L has the same coolant cores as the P90, but with smaller cores for the intake and exhaust runners, and combustion chambers. The Bare O5L weighed more than a comparably stripped P90 I have so that may be the case given what appears to be thicker than usual casting in the runner. I can't bear to cut up the P90, but I think someone has in the past, that would confirm if the old tale is true or not. It was said they take the same porting as the P90 or N42 so maybe the water jacket was a standard part of the casting, with chambers and runners changed accordingly.

Had to be something interchangeable in the cores you would think...
Misanthropic Anthroparion Class 5 Hoarder, aspiring to posthumous fame as my containers are cut open and the market floods with crap I've squirrelled away over the years! I endeavour to persevere...

#14 fraz

fraz

    Junior Member

  • Members
  • PipPipPip
  • 53 posts
  • LocationNZ

Posted 29 April 2017 - 11:10 AM

Yes and no I think.
Not changing the water jacket would reduce design and tooling cost, but would also increase aluminum cost.

But they were being built at a time when designers only concentrated on making things function better. It wasn't until a few years later that the bean counters started putting the emphasis on costing less and less.
So your probably right :)

#15 240Z Turbo

240Z Turbo

    Member

  • Members
  • PipPipPipPipPip
  • 994 posts
  • LocationCharlotte, North Carolina

Posted 03 May 2017 - 10:45 AM

I also have an O5L head that I plan to use for my son's build so thanks for posting the pics.  If you can provide some wall measurements for the intake & exhaust ports that would be great.  I was the one who posted P90 cross section pics and the link is below.

 

http://www.eng.famu....liter/pics/P90/

 

intakeport1.JPG






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users