UPDATE PAGE 6 !!! 402/afr/fast 102 combo Nitrous results = 8xx/8xx
11-10-2011, 07:27 AM
#101
[QUOTE]edcmat-l1 Your tuner is an idiot if he didn't think bottle pressure was an issue. That's one of the most important elements of nitrous tuning. Everything in a nitrous tune revolves around bottle pressure. It needs to be dead nuts consistent to tune properly. i kinda have thought this from the start, even with all the good points said
Last edited by BOBS99SS; 11-10-2011 at 07:29 AM. Reason: edit
11-11-2011, 10:15 PM
#106
Staging Lane
Thread Starter
iTrader: (4)
Join Date: Nov 2006
Location: Plano, TX
Posts: 88
Likes: 0
Received 0 Likes
on
0 Posts
Ok I have to clarify, I was wrong my tuner was right. My gauge wasn't accurate. I put a new one on today. After talking with him today I now realize we were not on the same page. He was confident on the bottle pressure because he just personally filled my bottle. The pulls were made with 950psi, Im starting to think I have trash in a line somewhere. I put this combo together with nitrous in mind so I was expecting it to be more responsive on the bottle! My 100, and 200 numbers were about half of the shot size power wise but the fact that a 200 made more than a 250 baffles me..
11-12-2011, 08:12 AM
#107
Back from the dead! Went to the dyno today, temps were 30degrees cooler swapped from 1 3/4 headers to 1 7/8 with a better merger y and it made 524/472 now here it goes getting weird again every shot of nitrous I sprayed was atleast 50hp off. The bottle was filled but freezing cold had Teribble pressure and I think it was spinning some on the rollers.. Hopeful someone can chime in on my graphs, they look horrible. It's a nitrous outlet 102 plate.. Everything is set up somewhat for the nitrous... Just is not hitting hard.
Was running pretty rich also
Na 524/472
100shot 566/501
200shot 661/593 78n 46f also tried 44f didn't change much
250 shot 641/ 585??? 88n 46f
Was running pretty rich also
Na 524/472
100shot 566/501
200shot 661/593 78n 46f also tried 44f didn't change much
250 shot 641/ 585??? 88n 46f
Ok I have to clarify, I was wrong my tuner was right. My gauge wasn't accurate. I put a new one on today. After talking with him today I now realize we were not on the same page. He was confident on the bottle pressure because he just personally filled my bottle. The pulls were made with 950psi, Im starting to think I have trash in a line somewhere. I put this combo together with nitrous in mind so I was expecting it to be more responsive on the bottle! My 100, and 200 numbers were about half of the shot size power wise but the fact that a 200 made more than a 250 baffles me..
11-17-2011, 02:41 PM
#108
On The Tree
iTrader: (1)
Join Date: Jul 2005
Location: From Indy now San Diego
Posts: 176
Likes: 0
Received 0 Likes
on
0 Posts
Just saw your update, glad to see that removing the restricted part of the exhaust put you way over 500whp, like I knew it would with that wonderful cam. 
11-30-2011, 03:19 PM
#109
TECH Enthusiast
iTrader: (2)
Join Date: May 2009
Location: Iceland
Posts: 523
Likes: 0
Received 0 Likes
on
0 Posts
Are you running fuel pressure switch....
if so you are maby loosing fuel pressure on the bigger shots, and it´s cutting off
i would jet it down more f41 or maby f38 atleast try it
fuel pressure loss could be the reason additional to too low nitrous pressure , it should be in the 950-1050 range
i have similuar setup in my Vette
LS2 404ci TFS215cc 11.4:1 CP 248/254 cam FAST92/90 kooks 1"7/8
nitrous outlet 92mm plate kit and a standalone cell
We dont have dyno here but my best NA run is 10.85@130
and on 200 shots N78 F35 18°timing i went 10.1@143
good luck
Baezi
if so you are maby loosing fuel pressure on the bigger shots, and it´s cutting off
i would jet it down more f41 or maby f38 atleast try it
fuel pressure loss could be the reason additional to too low nitrous pressure , it should be in the 950-1050 range
i have similuar setup in my Vette
LS2 404ci TFS215cc 11.4:1 CP 248/254 cam FAST92/90 kooks 1"7/8
nitrous outlet 92mm plate kit and a standalone cell
We dont have dyno here but my best NA run is 10.85@130
and on 200 shots N78 F35 18°timing i went 10.1@143
good luck
Baezi
Last edited by baezi z06; 11-30-2011 at 03:46 PM.
12-04-2011, 09:49 AM
#110
10 Second Club
iTrader: (1)
Join Date: Sep 2007
Location: In Uranus!
Posts: 1,500
Likes: 0
Received 0 Likes
on
0 Posts
Are you running fuel pressure switch....
if so you are maby loosing fuel pressure on the bigger shots, and it´s cutting off
i would jet it down more f41 or maby f38 atleast try it
fuel pressure loss could be the reason additional to too low nitrous pressure , it should be in the 950-1050 range
i have similuar setup in my Vette
LS2 404ci TFS215cc 11.4:1 CP 248/254 cam FAST92/90 kooks 1"7/8
nitrous outlet 92mm plate kit and a standalone cell
We dont have dyno here but my best NA run is 10.85@130
and on 200 shots N78 F35 18°timing i went 10.1@143
good luck
Baezi
if so you are maby loosing fuel pressure on the bigger shots, and it´s cutting off
i would jet it down more f41 or maby f38 atleast try it
fuel pressure loss could be the reason additional to too low nitrous pressure , it should be in the 950-1050 range
i have similuar setup in my Vette
LS2 404ci TFS215cc 11.4:1 CP 248/254 cam FAST92/90 kooks 1"7/8
nitrous outlet 92mm plate kit and a standalone cell
We dont have dyno here but my best NA run is 10.85@130
and on 200 shots N78 F35 18°timing i went 10.1@143
good luck
Baezi
12-04-2011, 10:01 AM
#111
Teching In
Join Date: Dec 2010
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
I have the same setup in my 2002 Z28 LS2 402ci with TFS 215cnc heads with some work done to them, ported fast 90mm intake and nw 90mm tb. ARH 1 7/8 headers. my cam spec @50 are 246/255 and 600+ lift on a 113+2LSA My car has ran a best of 10.39@129mph with a 1.41 60ft 6.60@103mph 1/8th. This is through a full weight, 3500+ race weight, th350 tranny with a 5000rpm stall.
12-04-2011, 10:56 AM
#112
10 Second Club
iTrader: (1)
Join Date: Sep 2007
Location: In Uranus!
Posts: 1,500
Likes: 0
Received 0 Likes
on
0 Posts
I made 3 passes that night and that was the first time running the car with the new setup. The first pass I lifted after the launch because it was heading straight towards the wall. on that pass I went a 10.57@128mph, 2nd pass I went a 10.40@128mph and 10 minutes later I went 10.39@129mph. So the car has more left in it. I just need to keep messing with it.. Oh and btw this is on pump gas..
12-31-2011, 01:56 AM
#113
Staging Lane
Thread Starter
iTrader: (4)
Join Date: Nov 2006
Location: Plano, TX
Posts: 88
Likes: 0
Received 0 Likes
on
0 Posts
Took my car back today,everything went perfect... except I still have some kinda bad connection showing up... The weird thing is I added a LPE timming controler, so we pulled 4 degrees and unhooked the fuel, an left the bottle closed, made a pull to make sure it was pulling timming when the nitrous activated, and got the same wavy results on motor.. I think I may have my racetronix hotwire kit wired wrong or sometheing its a DW300 fuel pump.
Since last Nitrous dyno I added:
UD pulley
4inch bellow over 3inch
lighter Racestar wheels
-6 Main line
NO race line from plate to nozzle
before a 200 and 250 both made 661, 663
This time, 150 made 693/700 -6 degrees
250 made 839/873 (I need a slightly larger fuel jet) was 88N, 46F @ 55psi -10degrees, Bottle psi 1050 full bottle
Numbers seems crazy...
Input please because the graph still looks crazy and I want to figure this out
Since last Nitrous dyno I added:
UD pulley
4inch bellow over 3inch
lighter Racestar wheels
-6 Main line
NO race line from plate to nozzle
before a 200 and 250 both made 661, 663
This time, 150 made 693/700 -6 degrees
250 made 839/873 (I need a slightly larger fuel jet) was 88N, 46F @ 55psi -10degrees, Bottle psi 1050 full bottle
Numbers seems crazy...
Input please because the graph still looks crazy and I want to figure this out
