JRracing

iTrader: (35)

we are going through the motor over the winter and I was wondering about switching the rings to something more for n2o. We are spraying 100-250 shot through a plate.

The motor is a 383 with diamond pistons and eagle crank and rods. It has hasting moly rings in it now. Would it be worth switching to something differant?

G Engines

It will be well worth it to change your rings the molly rings will take it for a short while but it will be short. The heat the nitrous produces will burn the moly coating off of the rings resulting in ring failure. I would recommend to change to an HTD, Xtream ring from Akerly and Childs. Scoggins stocks them they will run you about $160 and will handle all the nitrous you can throw at them. I use these rings in all of our nitrous and FI engines with much better results than any other brand.

JRracing

iTrader: (35)

I seen that scoggin dicky has A&C rings. I will look at them later today.

JRracing

iTrader: (35)

The Extreme rings at SD are $116. Not bad. What kind of gap would I need to set these up at for this kind of shot? Do they sell them in a 3.905" bore? How does that work?

JRracing

iTrader: (35)

TTTTT. Anybody?

G Engines

use .006 per inch of bore and you will be good to go 3.900*.006=.023 on your top and i would go .025 on your second 3.9005 bore is common they should have them in stock.

jetblast

why is the gap for boost different than a nitrous set-up?... i saw a build with total seal, top ring was .028 and 2nd was .020

G Engines

Im not sure who set a ring gap up like that but I would never run that set up. When you run a slightly bigger gap in you second ring it helps to release the pressure in between the rings reducing the risk of lifting a ring land. I also run close to the same gap for a boosted app. as a nitrous taking in account the amount of boost or nitrous shot's.

JRracing

iTrader: (35)

Thank you for the advice. It helps.

CamaroRick

iTrader: (24)

then how come diamond reccommended .26 top .22 bottom?

jetblast

perhaps gap choices are directly related to how far the pin is up. stroker versus none stroker.

G Engines

Your ring gap is based on the heat produced on the top ring when you add things such as nitrous or boost the heat is increased requiring a larger gap for ring expiation. I can only give advise on what I have learned from my own personal experiences building engines with multiple stages of nitrous and supper chargers, or what I have read from ring manufactures. IMO that ring set up is incorrect.

sweetbmxrider

iTrader: (13)

thanks for sharing the info, it will help me in the future.

jetblast

there is no question field experience is worth it's weight in gold. here is the build i was talking abuout.

http://www.enginebuildermag.com/Cont...0000011833.pdf

JRracing

iTrader: (35)

The A&C Extream rings are the best value at this point. Is there a web site were I can find out more about these rings? The vendor adds do not tell much about them.

G engines, what kind of motor expierence do you have at building motors? How many years and what type of stuff do you build? Just curious..

jetblast

http://www.akerlychilds.com/
http://www.speedtalk.com/forum/viewt...18acbab1fa42bd
here are coulple of links that i found. i'm also researching for my next build.

JRracing

iTrader: (35)

Very good info in that thread. Thank you!