Doing reengineering to a L-series head

General Discussion about the Datsun PL510
Post Reply
User avatar
510wizard
Supporter
Posts: 1031
Joined: 12 Sep 2005 09:50
Location: Reno, Nevada

Doing reengineering to a L-series head

Post by 510wizard »

Back when I was starting college, there was a dentist in town that had hobby based shop, where his played with VW engines. He let me hang around and watch him modify cylinder heads by welding the combustion cambers and ports. He would then reshape them, blueprint the engines,and put them on his own dyno to check the progress. Looking back, the guy in this link reminds me of the dentist in what he did.

http://performanceforums.com/forums/sho ... atsun-head

Love the fact, that he moved the head over on the block to better position in the valves in the cylinder. And check out the combustion camber redesign. Great craftsmanship! The title says it all, "Doing some stupid shit to an old Datsun head"
510rob
Moderator
Posts: 5163
Joined: 09 Oct 2003 23:37
Location: Vancouver, BC

Re: Doing reengineering to a L-series head

Post by 510rob »

that is a very interesting read, thanks for posting that Monte.
User avatar
okayfine
Supporter
Posts: 14154
Joined: 12 Nov 2007 23:02
Location: Newbury Park, CA

Re: Doing reengineering to a L-series head

Post by okayfine »

Demonstrating the motto that all L-series power is made in the head.
Because when you spend a silly amount of money on a silly, trivial thing that will help you not one jot, you are demonstrating that you have a soul and a heart and that you are the sort of person who has no time for Which? magazine. – Jeremy Clarkson
KoHeartsGPA
Posts: 513
Joined: 15 Oct 2006 12:03
Location: Eugene,Oregon

Re: Doing reengineering to a L-series head

Post by KoHeartsGPA »

Where's Matt!!!, I have an extra U67 (I believe) laying around! :P
Experimentation FTW!
Diego.
User avatar
Mattndew76
Supporter
Posts: 1609
Joined: 23 Jul 2006 18:26
Location: Creswell, Oregon.

Re: Doing reengineering to a L-series head

Post by Mattndew76 »

:mrgreen:
An Idea doesn't work unless you do.
User avatar
James
Posts: 2136
Joined: 26 Nov 2007 19:58
Location: Laguna Beach, Ca

Re: Doing reengineering to a L-series head

Post by James »

I realize its minor stuff compared to whats happening elsewhere, but how does the chain guide/tensioner work with the head shift…..
Finished is better than perfect......
User avatar
okayfine
Supporter
Posts: 14154
Joined: 12 Nov 2007 23:02
Location: Newbury Park, CA

Re: Doing reengineering to a L-series head

Post by okayfine »

I'd imagine the tensioner would compensate, as if the chain was stretched over time. A 14:1, near 300HP L-series isn't a 10000-mile motor. It'll get opened up and refreshed pretty frequently.
Because when you spend a silly amount of money on a silly, trivial thing that will help you not one jot, you are demonstrating that you have a soul and a heart and that you are the sort of person who has no time for Which? magazine. – Jeremy Clarkson
User avatar
gooned
Posts: 1043
Joined: 07 Jul 2003 23:19
Location: Langley

Re: Doing reengineering to a L-series head

Post by gooned »

Amazing the talent some blokes have! I've personally never heard of moving the head over or half the jargon used to describe the porting...wow, just wow.
User avatar
Dave Patten
Supporter
Posts: 838
Joined: 20 Jun 2008 13:30
Location: Dunbarton, NH

Re: Doing reengineering to a L-series head

Post by Dave Patten »

The mini modified circle track guys here in New England years back would build some healthy L18 engines. It was the engine to use at the time and guys were openly claiming 235hp at the crank.

They would angle cut the head to change the valve angle. These ran on race fuel, 110-112 octane stuff and would run 15-20 races without a teardown, basically a full season.
Dave Patten
http://www.FutoFab.com
Dunbarton, NH
Post Reply