Posted By: MIKES_DUSTER
HYPER PISTONS AND NOS - 06/24/11 12:26 AM
How must NOS can you SAFELY run without having problems with these pistons?????
HYPER PISTONS AND NOS
Posted By: cheapstreetdustr
Re: HYPER PISTONS AND NOS - 06/24/11 12:51 AM
there is no real answer to this question..
it more of how much detination can these pistons
with stand..or cylinder temps...
ive run as much as an .80 no2 jet with kb hypers
mostly .63 no2 with a proper tune..
and lately snuck a .73 jet in ( about 50 passes so far)
ive been told my et is prolly at the limit..
?
i had some detination lift the top of a piston
ive had a poor tune fat with too much timing melt a piston and cyl wall. both with a .63 jet pill.
but when its tuned right...it just takes all of this...same motor since 04..(sans the two repairs mention'd)
i dont know what hp level these jets are..but .63 it is usually around a second faster...
the .80 jet wasnt a full pass but the 60ft was .03 faster than a .63 pass and the 330 was .023 faster before i lifted..(it just felt funny)
the .73 jet ET is .2 faster and 3mph faster then the .63 pill..fwiw.
all 1/8th mile times
cheapst
it more of how much detination can these pistons
with stand..or cylinder temps...
ive run as much as an .80 no2 jet with kb hypers
mostly .63 no2 with a proper tune..
and lately snuck a .73 jet in ( about 50 passes so far)
ive been told my et is prolly at the limit..
?
i had some detination lift the top of a piston
ive had a poor tune fat with too much timing melt a piston and cyl wall. both with a .63 jet pill.
but when its tuned right...it just takes all of this...same motor since 04..(sans the two repairs mention'd)
i dont know what hp level these jets are..but .63 it is usually around a second faster...
the .80 jet wasnt a full pass but the 60ft was .03 faster than a .63 pass and the 330 was .023 faster before i lifted..(it just felt funny)
the .73 jet ET is .2 faster and 3mph faster then the .63 pill..fwiw.
all 1/8th mile times
cheapst
Posted By: cheapstreetdustr
Re: HYPER PISTONS AND NOS - 06/24/11 01:12 AM
for reference..
here is an excellent comparison of how much a .63 no2 jet makes..
this is my car in right lane with .63 jet green duster
vrs
a car in the left lane blue dustert hat runs an identical time as my car when its n/a
so figuratively speaking this is my car racing itself side by side with and without nitrous..
(hope this makes sense)
so you can see the difference
http://www.youtube.com/watch?v=I1ZoE-WiQhs
here is an excellent comparison of how much a .63 no2 jet makes..
this is my car in right lane with .63 jet green duster
vrs
a car in the left lane blue dustert hat runs an identical time as my car when its n/a
so figuratively speaking this is my car racing itself side by side with and without nitrous..
(hope this makes sense)
so you can see the difference
http://www.youtube.com/watch?v=I1ZoE-WiQhs
Posted By: Randy..
Re: HYPER PISTONS AND NOS - 06/24/11 01:49 AM
pay SPECIAL attention to ring gap with them.
Posted By: MIKES_DUSTER
Re: HYPER PISTONS AND NOS - 06/24/11 02:03 AM
Hey Cheap.....Nice run!!!!!! How much HP of NOS did you have on that run??
Randy....What if you dont know the ring gap???
Randy....What if you dont know the ring gap???
Posted By: Randy..
Re: HYPER PISTONS AND NOS - 06/24/11 02:10 AM
very wide gap for NOS or you will pull the tops off the pistons, years ago all the chevy guys where doing that and didn't know why, gap has to be around .080 on the top ring, really depends on the piston maker.
Posted By: slantzilla
Re: HYPER PISTONS AND NOS - 06/24/11 02:22 AM
Normal ring gap is .004" per inch of bore. I used .010" per inch on mine and never butted a ring. I sprayed 150 for many passes and never broke anything.
If your tune-up is right everything will live. If it's wrong, it doesn't matter what kind of pistons you have, you'll kill them.
If your tune-up is right everything will live. If it's wrong, it doesn't matter what kind of pistons you have, you'll kill them.
Posted By: MIKES_DUSTER
Re: HYPER PISTONS AND NOS - 06/24/11 02:45 AM
Quote:
very wide gap for NOS or you will pull the tops off the pistons, years ago all the chevy guys where doing that and didn't know why, gap has to be around .080 on the top ring, really depends on the piston maker.
Keith-Black Hypers.
Posted By: Bad340fish
Re: HYPER PISTONS AND NOS - 06/24/11 03:24 AM
Quote:Quote:
very wide gap for NOS or you will pull the tops off the pistons, years ago all the chevy guys where doing that and didn't know why, gap has to be around .080 on the top ring, really depends on the piston maker.
Keith-Black Hypers.
If you don't know the ring gap you either need to tear it down and check/adjust it or just not put nitrous on it.
Posted By: MIKES_DUSTER
Re: HYPER PISTONS AND NOS - 06/24/11 03:30 AM
I aint tearing it apart so I guess no NOS for me. 
Posted By: mshred
Re: HYPER PISTONS AND NOS - 06/24/11 03:38 AM
Quote:
I aint tearing it apart so I guess no NOS for me.
Although I have never used nitrous YET myself, I'd run it, just dont get greedy with it....my reasoning why is tons of different cars running around spraying stock bottom end untouched motors with 100-150 shot, cast or forged pistons...they have factory ring gaps in them obviously. If they can do it, why can't you with a motor that should have stronger parts?
Thats just my
...as everyone says just stay safe on the tune and read the plugs and dont go too much, i think it would be fine I plan on spraying my stock cast piston bottom end 360 with a 150-175 shot eventually...just gotta get the kit on the car and do the fuel system for it
Posted By: MIKES_DUSTER
Re: HYPER PISTONS AND NOS - 06/24/11 03:53 AM
IF and thats a BIG IF I put it on,would only be 150hp anyway.
Posted By: mshred
Re: HYPER PISTONS AND NOS - 06/24/11 03:58 AM
Quote:
IF and thats a BIG IF I put it on,would only be 150hp anyway.
I would not worry in all honesty, but thats just me
Posted By: Randy..
Re: HYPER PISTONS AND NOS - 06/24/11 04:02 AM
the expansion rate with a Hyper is a LOT more than a cast or forged, thats why a larger gap is NEEDED, not because the alloy is weaker.
Posted By: gtsdude
Re: HYPER PISTONS AND NOS - 06/24/11 05:59 AM
I ran my 340 with stock bottom but forged replacement pistons, had no idea what the ring gap was. Monte gave me some tune ups. Biggest thing was to pull timing and get fuel pressure and bottle pressure right. Ran 150 tune up and went from 12.90 @ 105 to a 12.1 @ 113. I even pulled couple more degrees of timing out to make sure it stayed together. My drag radials would not hold from start line, so i hit the bottle just past the 60 foot mark. It did increase my trap rpm from 6000 to 6600.
Posted By: RemCharger
Re: HYPER PISTONS AND NOS - 06/24/11 06:52 AM
Quote:The piston transfers the heat into the ring, which , expands it more than other pistons, butting the ring ends together and pulls the top of the piston off.
the expansion rate with a Hyper is a LOT more than a cast or forged, thats why a larger gap is NEEDED, not because the alloy is weaker.
Thats why KB hyers need larger ring gap.
Posted By: Bad340fish
Re: HYPER PISTONS AND NOS - 06/24/11 02:22 PM
Quote:Quote:
IF and thats a BIG IF I put it on,would only be 150hp anyway.
I would not worry in all honesty, but thats just me
If i recall your were very worried about if you should or should not resize your rods. You will stress over that but will have no problem putting nitrous on whatever motor? Come on man
!I have put nitrous on an old motor I didn't know much about it, but I didn't care. It worked and it worked for a good amount of time but it was not the same motor when it was done.
Mike, i wouldn't do it if I were you. You have to much work into it to mess it up now. You haven't even been able to make your first trip to the track and your already trying to blow it up
. Get some runs on it then maybe tear it down and adjust the gaps for nitrous.
Posted By: Voluster
Re: HYPER PISTONS AND NOS - 06/24/11 02:29 PM
I sprayed those pistons up to 250 never had a problem with the smaller shot
I had a 178 runs and countless street miles on that motor before it lifted the tops off 2 of those pistons. when I got greedy and started hitting it with 250
If you stay with the smaller jetting and the motor is in good shape it should last a long time with a good tune up
I had a 178 runs and countless street miles on that motor before it lifted the tops off 2 of those pistons. when I got greedy and started hitting it with 250
If you stay with the smaller jetting and the motor is in good shape it should last a long time with a good tune up
Posted By: Steve Barton
Re: HYPER PISTONS AND NOS - 06/24/11 04:30 PM
Here is a pic of my experience with Hyper piston. 150 hp shot, there was to much damage to be sure what realy happened.
Posted By: MIKES_DUSTER
Re: HYPER PISTONS AND NOS - 06/24/11 04:30 PM
I wasnt planning on doing it till after I had it to the track and fine tuned it but now that everyone is tell me " NO WAY!!!",I wont be doing it.. Maybe ill just have to put a BB in it!!! 
Posted By: Steve Barton
Re: HYPER PISTONS AND NOS - 06/24/11 04:35 PM
Sorry that did not work here it is again
Posted By: MIKES_DUSTER
Re: HYPER PISTONS AND NOS - 06/24/11 07:50 PM
Quote:
Sorry that did not work here it is again
That is NOT what I want to happen!!!!!!
Posted By: mshred
Re: HYPER PISTONS AND NOS - 06/24/11 09:09 PM
Quote:Quote:Quote:
IF and thats a BIG IF I put it on,would only be 150hp anyway.
I would not worry in all honesty, but thats just me
If i recall your were very worried about if you should or should not resize your rods. You will stress over that but will have no problem putting nitrous on whatever motor? Come on man
I have put nitrous on an old motor I didn't know much about it, but I didn't care. It worked and it worked for a good amount of time but it was not the same motor when it was done.
Mike, i wouldn't do it if I were you. You have to much work into it to mess it up now. You haven't even been able to make your first trip to the track and your already trying to blow it up
my rods were never resized lol...ARP bolts torque cycled a couple times...no machine work done on my motor and its running good now
Posted By: cheapstreetdustr
Re: HYPER PISTONS AND NOS - 06/28/11 05:22 PM
follow the headed warnings as it regards to kb hypers..
the pistons can handle 250 imho..
but if the rings arent clearenced for nitrous..
(and its a big gap so iam sure they arent set up that way) then definately dont do it.
ive butted them adn lifted the top of a piston with a bad tune and we supposedly had the correct added gap.
it only removed a small piece the size of a chicklet gum...but the piece closed teh plug and caused a dead cyl.. i was thankful for this as
we pulled the head..and there was no other damage on this inncodent.
but it wasnt the only catostophic failure in all the yrs running no2 in this motor...
it is still running today fwiw..
Mike all my data is based off pill size ive been told a .63 no2 jet is 150 hp?
if i compute et/mph to the weight it says 158hp increase?
chepast
the pistons can handle 250 imho..
but if the rings arent clearenced for nitrous..
(and its a big gap so iam sure they arent set up that way) then definately dont do it.
ive butted them adn lifted the top of a piston with a bad tune and we supposedly had the correct added gap.
it only removed a small piece the size of a chicklet gum...but the piece closed teh plug and caused a dead cyl.. i was thankful for this as
we pulled the head..and there was no other damage on this inncodent.
but it wasnt the only catostophic failure in all the yrs running no2 in this motor...
it is still running today fwiw..
Mike all my data is based off pill size ive been told a .63 no2 jet is 150 hp?
if i compute et/mph to the weight it says 158hp increase?
chepast
Posted By: MIKES_DUSTER
Re: HYPER PISTONS AND NOS - 06/28/11 06:07 PM
Thanks Cheap!!!!! Ive decided NOT too put NOS on this motor. I cant afford it to blow up. LOL
Posted By: Crizila
Re: HYPER PISTONS AND NOS - 06/28/11 11:43 PM
Quote:Good idea! They are just not the right pistons for an NOS motor. Besides the ring gap issue, those pistons are not very detonation tolerant - yes, don't ask me how I know.
Thanks Cheap!!!!! Ive decided NOT too put NOS on this motor. I cant afford it to blow up. LOL
Posted By: MIKES_DUSTER
Re: HYPER PISTONS AND NOS - 06/29/11 02:42 AM
Quote:Quote:Good idea! They are just not the right pistons for an NOS motor. Besides the ring gap issue, those pistons are not very detonation tolerant - yes, don't ask me how I know.
Thanks Cheap!!!!! Ive decided NOT too put NOS on this motor. I cant afford it to blow up. LOL
I wont!!!! LOL