New Guy Nitrous ??? - Chevelle Tech
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post #1 of 33 (permalink) Old Apr 20th, 19, 2:11 PM Thread Starter
 
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New Guy Nitrous ???

I'll try again lost it first time. lol
So I have looked on here before but never posted.
I start with Hello
I have a few questions about a nitrous plate kit but first I'll tell you about my car
1969 Chevelle SS
461 ci BBC dyno 528 hp at 6000 rpm
Forged lower end
049 heads they have had some blending work done
Older style Torker intake. 2500-6500
850 DP holley by Jet proformance
Comp cams hyd. 570 lift
1 3/4 inch headers with 3 inch exhaust with crossover
400 turbo with shift kit, manual valve body
3200 stall convertor
410 gears 12 bolt
UMI uppers/ lowers
New stock spring
275/60/15 Nitto tires on weld drag
Line lock

So I have had car since early 90s but sat in an old farm barn second floor for 17 years.
Got it down two years ago and went to work.
I have been driving it on street for a couple summers and now have the urge to take it to drag strip with friends.

I have been looking at a Nitrous plate kit and have some basic questions, or at least I think basic
I am looking at like 125/150 kit, start with 125 for sure.
I know that timing needs to be retarded
Needs to have good fuel supply
Probably colder plugs.
Question are?
Do I need a purge kit?
Do I need a bottle heater?
How dependable is the WOT switch that comes with kits?

I sure you guys here are tired of these type of questions on here again and again so I will apologize up front.
It's just that I have never had any experience with Nitrous so I am not wanting to make any dumb mistakes caused by just not spending a few dollars more for security.

So any information that any of you could turn me on to I would really appreciate it.
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post #2 of 33 (permalink) Old Apr 20th, 19, 2:18 PM
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Re: New Guy Nitrous ???

If you bring it to the track have a blow down tube and a fire jacket, if not, the bottle may come out in tech.

Steve R
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post #3 of 33 (permalink) Old Apr 20th, 19, 4:01 PM Thread Starter
 
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Re: New Guy Nitrous ???

Quote:
Originally Posted by Steve R View Post
If you bring it to the track have a blow down tube and a fire jacket, if not, the bottle may come out in tech.

Steve R
Steve, even if the bottle is mounted in the trunk?
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post #4 of 33 (permalink) Old Apr 20th, 19, 4:16 PM
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Bob
 
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Re: New Guy Nitrous ???

I have had a 125 shot of N2O on my big block for 20 years. I have never had a purge kit or a full throttle switch, just a fuel pressure cut off switch. Never had any problems with it or caused any damage. I never had a bottle heater but the system wonít work if the bottle gets cold and you loose pressure. I have a pressure gauge back at the bottle and I like to see 900 psi before using it. If it a colder day you will have to use something like a hair dryer to heat up the bottle.

1969 SS396 Convertible
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post #5 of 33 (permalink) Old Apr 20th, 19, 4:41 PM
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Re: New Guy Nitrous ???

don't need a purge or a blanket. you do not need a blow down kit in the trunk but it is a good safety Idea any way so get it for $20-$30 it is worth it. as for the rest make sure it is plumbed with no leaks and make sure you flow test the fuel side after install. that is all there is to a 125 shot setup.

78 Malibu, 402, th350, holley sniper EFI, 9" 3:70, Hoosier 26X8.50-15 slicks.
69 VW baja 1600cc.
96 chevy 1500, tow vehicle.
03 yz85 fun bike.
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post #6 of 33 (permalink) Old Apr 20th, 19, 4:52 PM
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Re: New Guy Nitrous ???

Quote:
Originally Posted by Cper View Post
Steve, even if the bottle is mounted in the trunk?
Due to the openings in the braces behind the rear seat racing organizations consider the trunk to be part of the interior. Look in your trunk, you will see the back of your rear seat. Many tracks will let you run, but some wonít, since its technically not compliant with the rules. Itís better to make the car legal, that way you will never be in a position where you need to worry about failing in tech and either having to remove something like the bottle or being sent home.

Steve R
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post #7 of 33 (permalink) Old Apr 20th, 19, 5:06 PM Thread Starter
 
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Re: New Guy Nitrous ???

Quote:
Originally Posted by Bob Tiley View Post
I have had a 125 shot of N2O on my big block for 20 years. I have never had a purge kit or a full throttle switch, just a fuel pressure cut off switch. Never had any problems with it or caused any damage. I never had a bottle heater but the system wonít work if the bottle gets cold and you loose pressure. I have a pressure gauge back at the bottle and I like to see 900 psi before using it. If it a colder day you will have to use something like a hair dryer to heat up the bottle.
Thanks for the reply
Where is the pressure switch mounted at? And where is it set to?
So do you just have a activation switch? How and when do you engage the N2O?
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post #8 of 33 (permalink) Old Apr 20th, 19, 5:11 PM Thread Starter
 
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Re: New Guy Nitrous ???

Quote:
Originally Posted by Steve R View Post
Due to the openings in the braces behind the rear seat racing organizations consider the trunk to be part of the interior. Look in your trunk, you will see the back of your rear seat. Many tracks will let you run, but some wonít, since its technically not compliant with the rules. Itís better to make the car legal, that way you will never be in a position where you need to worry about failing in tech and either having to remove something like the bottle or being sent home.

Steve R
Thanks Steve, so from what I'm hearing a blow down tube would be a good idea regardless.
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post #9 of 33 (permalink) Old Apr 20th, 19, 5:13 PM Thread Starter
 
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Re: New Guy Nitrous ???

Does anyone mount two bottles so there is an extra when one runs out or do you just have Ann extra one on hand to make the change?
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post #10 of 33 (permalink) Old Apr 20th, 19, 5:21 PM
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Re: New Guy Nitrous ???

I have read that some big name tested AFR ratios with and without a purge kit and in a tiny amount of time when the nitrous was activated the engine AFR went way lean when using a purge kit.
The fuel did not come on quick enough.
Without the purge kit the engine saw a slight rich situation as soon as the nitrous was activated and this guy said the slight rich will be safer and he did not recommend the purge set up.

For what that is worth.
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post #11 of 33 (permalink) Old Apr 20th, 19, 5:38 PM
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Re: New Guy Nitrous ???

Quote:
Originally Posted by Cper View Post
Thanks for the reply
Where is the pressure switch mounted at? And where is it set to?
So do you just have a activation switch? How and when do you engage the N2O?
for your setup use a WOT switch, when first starting out with n20 it is a good idea. Not sure how his switch is wired but most put a switch in the fuel line so if the fuel pressure drops too much the n20 won't activate. I have seen guys also wire in a oil pressure switch in case oil pressure drops to keep it from activating in that situation as well, but with the small shot you are putting too it just make sure the engine is sound and you should have no need for the oil pressure switch. the fuel switch is a good idea in case, so the n20 will not go lean. read up on it and you will find the answers your looking for.

78 Malibu, 402, th350, holley sniper EFI, 9" 3:70, Hoosier 26X8.50-15 slicks.
69 VW baja 1600cc.
96 chevy 1500, tow vehicle.
03 yz85 fun bike.
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post #12 of 33 (permalink) Old Apr 20th, 19, 9:35 PM Thread Starter
 
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Re: New Guy Nitrous ???

Maybe both.😂😂
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post #13 of 33 (permalink) Old Apr 20th, 19, 10:25 PM
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Jeff
 
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Re: New Guy Nitrous ???

As for 2 bottles you can do that but it means more weight on board and it means more plumbing.

78 Malibu, 402, th350, holley sniper EFI, 9" 3:70, Hoosier 26X8.50-15 slicks.
69 VW baja 1600cc.
96 chevy 1500, tow vehicle.
03 yz85 fun bike.
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post #14 of 33 (permalink) Old Apr 20th, 19, 10:49 PM Thread Starter
 
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Re: New Guy Nitrous ???

Any preference by you guys on a kit? Is there really any disadvantage to using the WOT switch instead of a button?
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post #15 of 33 (permalink) Old Apr 20th, 19, 11:17 PM
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Re: New Guy Nitrous ???

Quote:
Originally Posted by Cper View Post
Any preference by you guys on a kit? Is there really any disadvantage to using the WOT switch instead of a button?
no disadvantage at all. As for kits it is all in what you want. I like NX or nitrous express, NOS is good, they have a preset kit that will only do 125. all in what you want and like.

78 Malibu, 402, th350, holley sniper EFI, 9" 3:70, Hoosier 26X8.50-15 slicks.
69 VW baja 1600cc.
96 chevy 1500, tow vehicle.
03 yz85 fun bike.
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