Slant Six Forum :: biggest N20 shot

175 shot with a fuel rich tune-up was not fine.

Quote:

175 shot with a fuel rich tune-up was not fine.

That is the point where I started breaking pistons, also. 150 was fine, 175 scrap city.

Quote:

I had the opportunity to run with Charlie S. on a test and tune night last year, and i got to see his car go from a 17.?? to mid 13's using 125 shot on a 170 engine. I was very surprised.

That was the first time that car had been to the track in 2 years. The engine is a totally stock short block, just a cam and bolt-on's, with the nitrous. Don't run too much timing, and don't go lean.

I went to the Hagerstown slant race with the car exactly the same as last year, and was running 13.6's on sat.
Sunday morning I changed my nitrous/fuel jets. I found I only had a 100 shot in the engine, not 125. I installed 150 HP jets, and proceded to run a 13.10. I picked up about 4-5 tenths, and about 1.2 MPH. Only 3 runs at that setting but engine seems to be ok.

Author:	Charrlie_S [ Sun Feb 27, 2011 6:35 pm ]
Post subject:
Quote: 175 shot with a fuel rich tune-up was not fine. That is the point where I started breaking pistons, also. 150 was fine, 175 scrap city.

Author:	slantzilla [ Mon Feb 28, 2011 2:43 pm ]
Post subject:
Quote: Quote: 175 shot with a fuel rich tune-up was not fine. That is the point where I started breaking pistons, also. 150 was fine, 175 scrap city. Yeah, contrary to the popular belief, fuel rich is NOT safe, but just as bad or worse than nitrous rich.

Author:	Mopars4life [ Thu Apr 28, 2011 3:04 pm ]
Post subject:	Nitrous Plate
Is there such a thing as a 2 bbl nitrous plate thats fits a super six setup?

Author:	Mroldfart2u [ Sun May 01, 2011 5:12 pm ]
Post subject:
I have never seen a 2bbl N2O plate, but that doesn't mean there isn't one...

Author:	Joshie225 [ Sun May 01, 2011 5:49 pm ]
Post subject:
NOS used to have a 2bbl plate for the Holley 2300 series number 12900 They also had a Cheater system for Rochester Tri-Power 13033 and those plates should be the same bolt pattern as a BBD. The plates alone appear to be part number 12983. I found a picture and the middle plate is just a spacer! Too bad none of these part numbers come up when searching the NOS/Holley web site.

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Author:	Charrlie_S [ Sun May 29, 2011 6:11 am ]
Post subject:
Quote: Quote: I had the opportunity to run with Charlie S. on a test and tune night last year, and i got to see his car go from a 17.?? to mid 13's using 125 shot on a 170 engine. I was very surprised. That was the first time that car had been to the track in 2 years. The engine is a totally stock short block, just a cam and bolt-on's, with the nitrous. Don't run too much timing, and don't go lean. I went to the Hagerstown slant race with the car exactly the same as last year, and was running 13.6's on sat. Sunday morning I changed my nitrous/fuel jets. I found I only had a 100 shot in the engine, not 125. I installed 150 HP jets, and proceded to run a 13.10. I picked up about 4-5 tenths, and about 1.2 MPH. Only 3 runs at that setting but engine seems to be ok.

Author:	Charrlie_S [ Fri Jun 03, 2011 4:58 am ]
Post subject:
Quote: I went to the Hagerstown slant race with the car exactly the same as last year, and was running 13.6's on sat. Sunday morning I changed my nitrous/fuel jets. I found I only had a 100 shot in the engine, not 125. I installed 150 HP jets, and proceded to run a 13.10. I picked up about 4-5 tenths, and about 1.2 MPH. Only 3 runs at that setting but engine seems to be ok. Just a little update. My system is a 6 nozzel "fogger" type. I had been running #22 fuel and nitrous jets, which according to the NOS chart would give 100 hp. I increased the jet size to # 26's which is supposed to be 150 hp. I reciently was referred to some nitrous charts/formulas online. http://www.angelfire.com/fl4/pontiacdud ... lator.html Using the calculator at the bottom of the page running a #26 nitrous and fuel jet at 1000 lbs N2O pressure and 6 lbs fuel pressure, I should be a little on the rich side, and be at the 183 hp level.

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