hollow_point

so i was thinking about switching over to 30% nitro in my firestorm and was just wondering what the benefits and drawbacks (if any) would be. i currently run 20% in the truck right now, and its well broken in now, i have over a gallon through it. what needs to be done for the first couple runs when i switch over, and is there anything i should do or know before switching over to a higher nitro content?

Chris_RC

Richen up the needles 3/4 of a turn.

You will notice cooler temps and greater performance. might get about 30 seconds less runtime though. As far as drawbacks, you will have to add another head shim if you switch to 30%.

What fuel did you have and what 30% will you be swithing to? Fuel and oil content/if it is race or RTR blend.

hollow_point

im not sure which brand of fuel i will be getting, but probably sidewinder or bynon. most likely race fuel as well. is there a brand i should look for in particular? also why do i need a new head shim when switching over to 30%

jbates14760

Dude you gotta go with byrons! best stuff out. The 30% will be fine I run it with no issues. Just start with factory settings and tune from there.

hollow_point

yea im most likely gonna go with byrons as its easy to get around here. do u need to completely retune the engine or just the HSN?

CarGuy7a

I believe you need to add a shim to prevent pre detonation of the fuel. Someone correct me if I'm wrong.

Chris_RC

Yes, it is just a safety measure mostly. You will have to retune both needles a bit.

hollow_point

sounds good. i might give it all a try when im done this tank of gas. where can i get a good shim from?

Lumpkin

just use a stock shim for that motor

hollow_point

thanks for all the info guys. does anyone have any how-to's for installing the shims or is it pretty straight forward?

Chris_RC

Take the head and head button off and add the shim, then put the head and head button back on.

hollow_point

i figured it was that easy

Tempest02

i have been running byrons 30% in both my firestorms for the past 6 months with no problems. I did not shim the head just started at factory settings and went a tad richer

hollow_point

ok cool, thats good to know actually. i figured i would have to re-tune, but i dont see the point of a new shim. i dont see what a new shim will do that mine wouldnt. someone even said i could even put a stock shim in when i switch but i still dont see the point of all that.

SLAYERDUDE

You are adding another shim and not removing any.
This raises the gap between the top of the piston and the button at TDC which lowers the compression.
(more volume in combustion chamber at TDC)

Run Byrons gen 2

hollow_point

alright now it makes sense. i thought i was just removing the old one and replacing the one already on there. thanks for the clarification.i understand how it works now, thanks a lot