This is topic KB Pistons VS Nitrous in forum Tech Talk at Northern California Ford Owners  .


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Posted by lky_3 (Member # 1116) on :
 
Can KB Hyper-U Pistons handle Nitrous and if so, in what capacity? 75, 150, 200 shot? What do you think?
 
Posted by SmokinLX (Member # 1684) on :
 
Probably not a good idea but You might get away with the 75 shot, I would add a couple gallon's of good gas to the mix if You are going to do it.
 
Posted by turbo50 (Member # 6700) on :
 
I ran 215hp shot on factory hyp pistons.

Blew headgaskets but never hurt a piston.

Once the motor was apart tho I could tell it was on borrowed time. I thinkyou cna kill the block first.
 
Posted by svfreerider87 (Member # 5748) on :
 
whatever you squeeze, don't go cheap on the fuel, bottom line, gotta pay to play, play right.I've seen a 306 with forged bottom end and speed pro pistons get ripped literally shreds, what happens when you squeeze 175 shot on pump 91.
 
Posted by FordManDan (Member # 432) on :
 
Here's the deal:

As this argument is concerned: A piston is a piston if the air fuel ratio is safe.

I've sprayed on cast pistons, without worry. KB will tell you they've hit their hypers with 400+ HP NOS shots without failure.

If you run a lot of nitrous, you'll eventually have a lean condition for variety of possible reasons. When / if that lean condition occurs, will your pistons be able to hold up? If your pistons are Forged, the answer to that question is: "Most Likely". If they're not Forged, there's a good chance the answer is: "No".

Hypers also require larger ring gaps that other pistons. Many people ignore this and suffer engine failures....then they do the human thing and blame the pistons and not their reading comprehension level.

-dan

[ September 04, 2008, 08:19 PM: Message edited by: FordManDan ]
 
Posted by threethirty1 (Member # 7814) on :
 
is this the same for boost applications as well?
 
Posted by svfreerider87 (Member # 5748) on :
 
quote:
Originally posted by threethirty1:
is this the same for boost applications as well?
that's a whole nother ball game.
 
Posted by FordManDan (Member # 432) on :
 
quote:
Originally posted by threethirty1:
is this the same for boost applications as well?
Yes, pretty much. A lean condition with higher than "standard" cylinder pressure (nitrous or boost)can cause piston failure.

While both Nitrous and Boosted applications have to deal with changes in the atmosphere / environment in which they are running, nitrous applications are even more inconsistent because of changes in bottle pressure, etc.

-dan

[ September 04, 2008, 10:29 PM: Message edited by: FordManDan ]
 
Posted by threethirty1 (Member # 7814) on :
 
Right on, thx Dan.
 




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