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Re: nitrous question
[Re: a493demon]
#1483990
08/13/13 08:46 PM
08/13/13 08:46 PM
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Joined: Oct 2009
Posts: 1,267
North, Alabama
D-50
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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My Demon with a 15-1 360 and Hughes stage 2 ported stock heads and Hughes solid cam around .615 lift went from 7.20 to 6.47 in the 1/8 with severe traction problems. Picked up 11 mph. Had 47 nos/53 fuel jets in a cheater plate, supposed to have been 100 shot according to N.O.S.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: nitrous question
[Re: D-50]
#1483991
08/13/13 09:24 PM
08/13/13 09:24 PM
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Joined: Sep 2005
Posts: 1,551
baldwinsville new york
a493demon
pro stock
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pro stock
Joined: Sep 2005
Posts: 1,551
baldwinsville new york
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Quote:
My Demon with a 15-1 360 and Hughes stage 2 ported stock heads and Hughes solid cam around .615 lift went from 7.20 to 6.47 in the 1/8 with severe traction problems. Picked up 11 mph. Had 47 nos/53 fuel jets in a cheater plate, supposed to have been 100 shot according to N.O.S.
is that jetting backward's ?
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Re: nitrous question
[Re: a493demon]
#1483994
08/13/13 11:16 PM
08/13/13 11:16 PM
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Joined: Oct 2009
Posts: 1,267
North, Alabama
D-50
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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I just looked on my instructions and it has 47 n2o jet and 53 fuel jet.I ran mine that way for about 8 years and never had any problems. I would pick up close to 8 tenths in the 1/8.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: nitrous question
[Re: D-50]
#1483996
08/13/13 11:48 PM
08/13/13 11:48 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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Quote:
I just looked on my instructions and it has 47 n2o jet and 53 fuel jet.I ran mine that way for about 8 years and never had any problems. I would pick up close to 8 tenths in the 1/8.
Insructions are WAY off for a decent jet package. That's not even a little fat, that's a LOT of FAT!!! Monte updated a lot of the NOS tunes and that looks like an old one. The 100 shot set up I use to start is 47N/40F. I run a minimum of 7 steps smaller on fuel than n2o to start and step on it from there. Some guys like Monte, IIRC, have stated to run 10 smaller.
Sniper/powershot/cheater, jet them all the same and the fuel jet should not be larger than the n2o jet. That's what Monte told me.
You guys are beating the ring lands to death with those fat tune ups. 
There is a guy on another site using a super powershot IIRC, ran the stock 150 NOS jetting, 55/61 picked up .7-.8. Changed it to square 55/55, pulled timing, it's picked up close to 1.4 seconds and it's still fat! 13.3 to 11.91 and there likely still another 3-4 tenths in it.
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Re: nitrous question
[Re: a493demon]
#1483998
08/14/13 09:41 AM
08/14/13 09:41 AM
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Joined: Jan 2003
Posts: 13,365
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,365
Marion, South Carolina [><]
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The old tuneups used a bigger fuel jet than the nitrous. The new tuneups are squared. Much better, but still fat.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: nitrous question
[Re: a493demon]
#1483999
08/14/13 12:24 PM
08/14/13 12:24 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
3th's 
in the 8th? I'd think a 100 shot would be good for at least 5-7 tenths in the 1/4.
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Re: nitrous question
[Re: Quicksilver440]
#1484001
08/14/13 01:29 PM
08/14/13 01:29 PM
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Joined: Feb 2003
Posts: 1,942
Metro Detroit
OUTLAWD
top fuel
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top fuel
Joined: Feb 2003
Posts: 1,942
Metro Detroit
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i just hit my junk with a "100" shot. I reversed the recommended jetting to 53N/47F and the plugs looked pretty good, stayed conservative with timing.
How tall of a tire? will you run out of revs at the stripe?
Faster, Faster until the thrill of speed overcomes the fear of death...
71 Swinger - slowly collecting dust/parts
66 Belv. II - just a streetcar
88 Mustang - turbo LS beater
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Re: nitrous question
[Re: OUTLAWD]
#1484002
08/14/13 04:42 PM
08/14/13 04:42 PM
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Joined: Feb 2011
Posts: 76
california
hornetnut
OP
member
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OP
member
Joined: Feb 2011
Posts: 76
california
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it is 1/4 mile and i have 26x10 slicks.. im hoping for 1/2 sec drop.. i shift normally at 5500, and cross the stripe about the same..
Last edited by hornetnut; 08/14/13 04:43 PM.
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Re: nitrous question
[Re: Quicksilver440]
#1484003
08/14/13 04:43 PM
08/14/13 04:43 PM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Quote:
The more modern theory is that Fat is not safe....Fat kills ringlands.
IMO, its not "theory", its fact.
Go to one of Monte's classes. He explains it in very good detail.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: nitrous question
[Re: hornetnut]
#1484004
08/14/13 04:56 PM
08/14/13 04:56 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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Quote:
it is 1/4 mile and i have 26x10 slicks.. im hoping for 1/2 sec drop.. i shift normally at 5500, and cross the stripe about the same..
What's it run now?
A 100 shot on a 13 second car will pick up ~1+ seconds, same shot on an 11.00 car, not so much.
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Re: nitrous question
[Re: hornetnut]
#1484006
08/14/13 06:18 PM
08/14/13 06:18 PM
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Joined: Jun 2006
Posts: 5,162
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,162
CT
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Not sure but I think you'll pick up more with a smaller cam or a lot more converter (5000+). What are you running for heads, intake, and exhaust?
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: nitrous question
[Re: GTX MATT]
#1484007
08/14/13 06:50 PM
08/14/13 06:50 PM
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Joined: Feb 2011
Posts: 76
california
hornetnut
OP
member
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OP
member
Joined: Feb 2011
Posts: 76
california
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i was told this verter was supposed to stall over 3500, but i can only get 2500 out of it, eddy perf rpm heads, perf rpm intake, long tube headers and 3 in exhaust
Last edited by hornetnut; 08/14/13 06:56 PM.
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