Look what boost did for me :(
05-18-2007, 07:32 AM
#11
2nd Gear Member
Join Date: Mar 2007
Location:
Posts: 152
RE: Look what boost did for me :(
ORIGINAL: kev2369
Be honest with ya, i'm not sure on the scratch on the wall... I didn't put the bottom end together, and its been together for a while... It ran with ten pounds of boost for about 5k or so and never had any problems... But i had a set of heads and some parts laying around so i decided to bolt them on my car, and only had problems after they went on... For some reason it keeps ruining head gaskets between the cylinder wall and the water jackets... All i done when i pulled the heads off it saw the busted piston then flipped it over to see how the bottom end looks, which was fine, then i've been on vacation since
ORIGINAL: 67mustang302
Looks to me like your ring end gap might have been too tight, butted and the ring bound in the land against the cylinder wall, and snapped the top off that part of the piston. That's why you need more ring end gap for blown/nitrous
Is the cylinder wall scratched on that side?
Looks to me like your ring end gap might have been too tight, butted and the ring bound in the land against the cylinder wall, and snapped the top off that part of the piston. That's why you need more ring end gap for blown/nitrous
Is the cylinder wall scratched on that side?
05-18-2007, 07:22 PM
#15
5th Gear Member
Join Date: Oct 2005
Location: Ohio USA
Posts: 4,616
RE: Look what boost did for me :(
after you replace that piston, get a thick headgasket to lower the compression some.
Set the timing to 6-8 degrees with spout unplugged. You dont want combustion 10 , 13 14 degrees btdc before the piston is at top dead center with a stock setup, no no no.
Also be sure to use that $4.00 per gallon premium 93 and up not 89 or 88[&:], I wouldnt worry, this is a learning experience, gotta pay to play[:-]
Set the timing to 6-8 degrees with spout unplugged. You dont want combustion 10 , 13 14 degrees btdc before the piston is at top dead center with a stock setup, no no no.
Also be sure to use that $4.00 per gallon premium 93 and up not 89 or 88[&:], I wouldnt worry, this is a learning experience, gotta pay to play[:-]
05-18-2007, 07:39 PM
#16
6th Gear Member
Join Date: Apr 2007
Location: California
Posts: 10,468
RE: Look what boost did for me :(
Using a thicker gasketmay bea bad idea. It will lower compression, yes, but by very little, and it will have the negative effect of increasing quench height which may increase the possibility of detonation. You need to make sure your quench height is right for the gasket and deck clearance you have
05-18-2007, 09:45 PM
#19
2nd Gear Member
Join Date: Mar 2007
Location:
Posts: 242
RE: Look what boost did for me :(
ORIGINAL: 67mustang302
It seems like 95% of engine faliures are someone's mistake at some point in time, either the builder or the operator
It seems like 95% of engine faliures are someone's mistake at some point in time, either the builder or the operator
