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View Full Version : Engine builders/specialists advise please.


Nick J
04-12-10, 04:27 PM
Those of you who are in the know when it comes to c20 engines would you please take a look at my wip thread on page 160 and advise accordingly. Ive posted in here due to the fact it will get me more opinions etc. Hope you dont mind admin. please read the link below on page 160.

http://www.pngclub.com/forum/showthread.php?t=88548&page=160


Thanks,

Nick.
novasrikev
04-12-10, 04:57 PM
i would say very lean nick
Pistol Pete
04-12-10, 04:58 PM
SBS might be able to help. Iirc he has had a hand in the odd build here and ther!
Angus Closier
04-12-10, 05:50 PM
Mine was the same when I opened it up, Small pitting marks etc.
http://i267.photobucket.com/albums/ii311/landyman_farmstyle/19112009038.jpg

http://i267.photobucket.com/albums/ii311/landyman_farmstyle/19112009040.jpg

http://i267.photobucket.com/albums/ii311/landyman_farmstyle/19112009041.jpg

I have opted not to use the head, pistons have also been replaced. Im sure mine was running lean/pinking or somthing similar.

I would find another head and work with that.
Royston
04-12-10, 05:59 PM
Yes lots of predetonation.

Depending on depth of the pitting the head maybe salvageable, but probably safer to replace.

Didn't click if you already have a machine shop, I have used AMAC at Northallerton, not sure he's into turbo's, but builds race engines for allsorts, the racing Jag E type he has prepared for a customer is something else, experienced on all sorts seen Lotus Sunbeams, as well as run of the mill cars
Angus Closier
04-12-10, 06:10 PM
I never seen mine running before I got it so was a bit chancy, however I was going to rebuild anyway. My head was too far gone to be honest. At that time I wanted to run big power, it wasnt going to be worth the risk.
djbrowney
05-12-10, 08:22 PM
Thats a detonation problem, thats all there is to it. probaly caused from incorrect fuel pressure having never run a wideband and running incorrect afr's. Get the head welded and skimmed, get the block rebore and buy 0.5 mm oversize genuine mahla pistons. Quite simple but maybe not so kind on the pocket. If you need the head doing either contact gaz-d on mig or steveboyslim as im sure your rebuild parts will come from him :)