Nitrous Dyno Today - Page 2 - ZR-1 Net Registry Forums

LGAFF · 08-06-2017

Pulled the jets and had them correct.....fuel side was dry.....but might have been from sitting, could smell gas.....wonder if solenoid was not opening gas, I would think pumps should be able to supply the correct flow

Ccmano · 08-06-2017

I thought for sure this was going to be the next episode of the Big Bang Theory. Anxious to see how that bottom end holds up with nitrous on a 125k+ mile engine.

H

LGAFF · 08-06-2017

Was looking through a few pics I took when we were looking at the dyno results

Was making 428ftlbs at 4K RPM....also saw it was at 403RWHP at 5K

AFRs in the 14 range...yikes

ssrszz4 · 08-06-2017

Of all engines this might be the one that likes Nos the most looking forward to further results.

Sent from my XT1585 using ZR-1 Net Registry mobile app

XfireZ51 · 08-06-2017

Quote:

Originally Posted by LGAFF

Was looking through a few pics I took when we were looking at the dyno results

Was making 428ftlbs at 4K RPM....also saw it was at 403RWHP at 5K

AFRs in the 14 range...yikes

No not good at all. BOOM!

LGAFF · 08-06-2017

Well I have fuel getting to the solenoid, I know Solenoid has worked before on the fuel side......and the solenoid controls both the NOS/Fuel so we know it works at least in part. So we have the following possibilities

1)Fuel side of solenoid is not working

2)Jet is too small....which would be odd as typically they Jet it rich

3)Pumps cannot handle the dip in pressure and maintain what I need

RussMcB · 08-07-2017

Are you able to monitor the fuel pressure while the car's running? That might help you narrow it down.

LGAFF · 08-07-2017

I did not. We did test it without nitrous and fuel from the jet only and the car ran leaner. So thinking it's the pump

Sent from my iPhone using ZR-1 Net Registry

RussMcB · 08-07-2017

I think somewhere in the forum someone had a picture of a pressure gage temporarily connected to the test port, with a long hose so they could read the fuel pressure while driving (gage taped to windshield). You could do a brief test like that without a dyno.

Or you could go ahead and install a permanent fuel pressure gage. I did that when I first got my car to help troubleshoot its issues. Mine is located on the A pillar using a generic plastic pod. It's kind of nice having it. Might be useful some day, especially for a situation like yours.

Good luck. Looking forward to reading your progress and results. Sounds like it will be awesome.

XfireZ51 · 08-07-2017

Quote:

Originally Posted by LGAFF

I did not. We did test it without nitrous and fuel from the jet only and the car ran leaner. So thinking it's the pump

Sent from my iPhone using ZR-1 Net Registry

Lee,

Something for u to consider.

http://www.chevyhardcore.com/tech-st...failsafe-gauge

08-06-2017	#11
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,193	Re: Nitrous Dyno Today Pulled the jets and had them correct.....fuel side was dry.....but might have been from sitting, could smell gas.....wonder if solenoid was not opening gas, I would think pumps should be able to supply the correct flow __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

08-06-2017	#12
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Nitrous Dyno Today I thought for sure this was going to be the next episode of the Big Bang Theory. Anxious to see how that bottom end holds up with nitrous on a 125k+ mile engine. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. Last edited by Ccmano; 08-06-2017 at 08:24 PM.

08-06-2017	#13
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,193	Re: Nitrous Dyno Today Was looking through a few pics I took when we were looking at the dyno results Was making 428ftlbs at 4K RPM....also saw it was at 403RWHP at 5K AFRs in the 14 range...yikes __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

08-06-2017	#14
ssrszz4 Join Date: Jan 2017 Location: US Posts: 233	Re: Nitrous Dyno Today Of all engines this might be the one that likes Nos the most looking forward to further results. Sent from my XT1585 using ZR-1 Net Registry mobile app

08-06-2017	#16
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,193	Re: Nitrous Dyno Today Well I have fuel getting to the solenoid, I know Solenoid has worked before on the fuel side......and the solenoid controls both the NOS/Fuel so we know it works at least in part. So we have the following possibilities 1)Fuel side of solenoid is not working 2)Jet is too small....which would be odd as typically they Jet it rich 3)Pumps cannot handle the dip in pressure and maintain what I need __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

08-07-2017	#17
RussMcB Join Date: Jan 2015 Location: Marietta, GA USA Posts: 1,160	Re: Nitrous Dyno Today Are you able to monitor the fuel pressure while the car's running? That might help you narrow it down.

08-07-2017	#18
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,193	Re: Nitrous Dyno Today I did not. We did test it without nitrous and fuel from the jet only and the car ran leaner. So thinking it's the pump Sent from my iPhone using ZR-1 Net Registry __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

08-07-2017	#19
RussMcB Join Date: Jan 2015 Location: Marietta, GA USA Posts: 1,160	Re: Nitrous Dyno Today I think somewhere in the forum someone had a picture of a pressure gage temporarily connected to the test port, with a long hose so they could read the fuel pressure while driving (gage taped to windshield). You could do a brief test like that without a dyno. Or you could go ahead and install a permanent fuel pressure gage. I did that when I first got my car to help troubleshoot its issues. Mine is located on the A pillar using a generic plastic pod. It's kind of nice having it. Might be useful some day, especially for a situation like yours. Good luck. Looking forward to reading your progress and results. Sounds like it will be awesome.