Nitrous hp question
Nitrous hp question I asked this question on PT and since I am new to nitrous I am looking for any help i can get
Ok so i have a nitrous express mainline kit with a Dynotune 90mm plate kit. I am using Nitrous express jets for 150 plate which are 62/34.
I went to dyno last week and came up a bit puzzled. All the pulls were in 2nd gear. My N/A was 339 hp/ 307 tq My nitrous was 429 hp/ 459 tq. My afr was good at 12.5 ish. My normal timing is 27* and when the system is armed 5 degrees are pulled. Everything looked great from that end. My issue is why did I see 150 tq but 90 hp on a 150 shot.
I called NX and they suggested I jet for Dynotunes plate. So I called them. He said I could bump it up in the no2 jet but I should up the timing. Not a great idea but also we played with timing and when we bumped it up we lost power so that idea is out.
SO what am I missing? Im not shooting for high numbers I just expected more then a 90 hp difference. Should I bump the no2 jet. Or was it because I was in 2nd and didn't have enough time for pressure to build on the shot?
I am new to this and would appreciate any help and no I did not pull plugs.
Thanks for looking
Ok so i have a nitrous express mainline kit with a Dynotune 90mm plate kit. I am using Nitrous express jets for 150 plate which are 62/34.
I went to dyno last week and came up a bit puzzled. All the pulls were in 2nd gear. My N/A was 339 hp/ 307 tq My nitrous was 429 hp/ 459 tq. My afr was good at 12.5 ish. My normal timing is 27* and when the system is armed 5 degrees are pulled. Everything looked great from that end. My issue is why did I see 150 tq but 90 hp on a 150 shot.
I called NX and they suggested I jet for Dynotunes plate. So I called them. He said I could bump it up in the no2 jet but I should up the timing. Not a great idea but also we played with timing and when we bumped it up we lost power so that idea is out.
SO what am I missing? Im not shooting for high numbers I just expected more then a 90 hp difference. Should I bump the no2 jet. Or was it because I was in 2nd and didn't have enough time for pressure to build on the shot?
I am new to this and would appreciate any help and no I did not pull plugs.
Thanks for looking
Maybe like in the exhaust possibly. Reason I mention that is because initially I gained only 70 hp on my 100 shot, then added a better merge pipe and gained over a 100 hp on that same 100 shot
Ls1tech & Truck Sponsor
iTrader: (4)
Joined: Jun 2010
Posts: 2,267
Likes: 1
From: Wichita falls Texas
There is so many variables that go into it. Its normally nothing but a pain when you start mixing and matching if you don't have the capability to flow your nitrous system. If it is not making power, its normally either a restriction of nitrous flow, or too much fuel flow. (Rich condition.) If its our solenoids, there should be a nitrous filter on the inlet side of the nitrous solenoid inside the fitting. Shine a flashlight in there and make sure it isn't clogged. Also make sure you don't have the fuel jet in the nitrous side, etc. The nitrous jet should pretty much always be bigger than the fuel.
-Garrett
-Garrett
I had the exact same issue using the same mainline kit, except I used the NX Gemini plate.
What's happening is the .078 Nitrous noid is probably not large enough to match the flow of that plate. I upgraded my noids to the .125 orifice and the .187 fuel. The problem is gone. The Mainline kit was matched to flow with the mainline plate. So using any jet is going be a shot in the dark. If you matched your solenoids to the dyno tune plate, then you could jet in accordance to the plate you have currently.
Second gear seems abnormal as well. Why that gear? Converter was unlocked I assume?
What's happening is the .078 Nitrous noid is probably not large enough to match the flow of that plate. I upgraded my noids to the .125 orifice and the .187 fuel. The problem is gone. The Mainline kit was matched to flow with the mainline plate. So using any jet is going be a shot in the dark. If you matched your solenoids to the dyno tune plate, then you could jet in accordance to the plate you have currently.
Second gear seems abnormal as well. Why that gear? Converter was unlocked I assume?
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo The noise seems to be where it is going to. It makes sense also.
As far as the second gear pull that's easy. The previous Monday I was strapped down to do the exact same thing and did a base 2nd gear pull then a na 3rd. Made it to 126 mph about 5200 and the u joint pulled out of the shaft causing it to bounce and rip in two and rocket out from under the truck on the passenger almost hitting two 3000 hp pro mods being built.
I need to install a steel shaft to do 3rd gear pulls in the truck. It's on the list
As far as the second gear pull that's easy. The previous Monday I was strapped down to do the exact same thing and did a base 2nd gear pull then a na 3rd. Made it to 126 mph about 5200 and the u joint pulled out of the shaft causing it to bounce and rip in two and rocket out from under the truck on the passenger almost hitting two 3000 hp pro mods being built.
I need to install a steel shaft to do 3rd gear pulls in the truck. It's on the list
10 Second Club
Joined: Aug 2010
Posts: 4,465
Likes: 192
From: Harford Co. Maryland
The noise seems to be where it is going to. It makes sense also.
As far as the second gear pull that's easy. The previous Monday I was strapped down to do the exact same thing and did a base 2nd gear pull then a na 3rd. Made it to 126 mph about 5200 and the u joint pulled out of the shaft causing it to bounce and rip in two and rocket out from under the truck on the passenger almost hitting two 3000 hp pro mods being built.
I need to install a steel shaft to do 3rd gear pulls in the truck. It's on the list
As far as the second gear pull that's easy. The previous Monday I was strapped down to do the exact same thing and did a base 2nd gear pull then a na 3rd. Made it to 126 mph about 5200 and the u joint pulled out of the shaft causing it to bounce and rip in two and rocket out from under the truck on the passenger almost hitting two 3000 hp pro mods being built.
I need to install a steel shaft to do 3rd gear pulls in the truck. It's on the list
Torque= work
HP = how fast
I pulled the solenoid apart and the plunger is dimpled and the intake screen was clogged. I do not want to go bigger on a shot so do I rebuild or get a bigger noid and be done?
Ls1tech & Truck Sponsor
iTrader: (4)
Joined: Jun 2010
Posts: 2,267
Likes: 1
From: Wichita falls Texas
They will develop a dimple just from being used. It would be a very slight one though, if its a huge dimple it might have been left pressure up for a long period of time. A clogged screen can cut nitrous flow by up to 50% sometimes, I would clean out the screen and post some pictures of the piston. The clogged screen might have been the problem.
-Garrett
-Garrett
Thank you I will pull it later and snap a pic. The screen was clogged about 50%. I dropped my .062 jet and I have a gravel drivery so I need to wait for the new one to come in also.
