Very little gain going from 150-shot to 250-shot
04-14-2002, 06:40 PM
#1
Very little gain going from 150-shot to 250-shot Car runs consistent 11.2s @ 124 with a 150-shot, but when I jump to the 250 jets, I only see very minimal gains (about 2-tenths and 2mph). I am thinking the max usable wet shot spraying through the TB is about 150-175. More than that just can't be managed without direct port. Can you guess what my next mod is?
04-14-2002, 07:39 PM
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Re: Very little gain going from 150-shot to 250-shot That should be a constant 1.5's car on the mainland... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
04-14-2002, 08:40 PM
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Re: Very little gain going from 150-shot to 250-shot This is bad news to me then. I talk to TNT and advised them that I wanted to throw a 200-250 shot through the manifold. They suggsted I upgrade to their wet system which is rated at 250 max through the power ring. I asked if I should try to go the route of the direct port manifold and I was told if I don't plan on throwing more than the 250 at it. The direct port wasn't necessary. Any thoughts. Very disappointed with the news reckless has shared here <img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> <img border="0" alt="[whiner]" title="" src="graemlins/gr_cry.gif" />
04-15-2002, 12:22 AM
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Re: Very little gain going from 150-shot to 250-shot Did the car go lean?did the car spin for a long time ? I 60ft 1.60 with 125 dry kit and a 3200 stall. It is hard to say what the problem is with out more info.The car should have picked up 5 or 6 mph with the 100hp more expecially with tire spin. It sounds like it went lean. just my opinion. Another thought is what did you do with the timing you may have got knock retard if it pulled out the timing that would slow it down also.
04-15-2002, 02:15 AM
#7
Re: Very little gain going from 150-shot to 250-shot Rich....I actually had just uploaded an N2O program I built on LS1 edit. The new program pulled a few degrees of timing and richened the top up some.
It was weird though. I left the line and felt the car stumble, and then the N2O kicked in. I'm wondering if the initial shot of gasoline was too much for the intake. Seemed to bog just slightly.
On the run before with the 150 jets, I saw just a slight bit of KR with 28-29 degrees of timing. The O2s were solid .930 - .950 on the 150 shot. Thinking the reprogramming right before the run may have hurt things a little. I'm sure I was running fat if anything. Didn't record the 250 run, but I really doubt it went lean with my fuel system and programming.
Todd
It was weird though. I left the line and felt the car stumble, and then the N2O kicked in. I'm wondering if the initial shot of gasoline was too much for the intake. Seemed to bog just slightly.
On the run before with the 150 jets, I saw just a slight bit of KR with 28-29 degrees of timing. The O2s were solid .930 - .950 on the 150 shot. Thinking the reprogramming right before the run may have hurt things a little. I'm sure I was running fat if anything. Didn't record the 250 run, but I really doubt it went lean with my fuel system and programming.
Todd
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04-15-2002, 01:25 PM
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Re: Very little gain going from 150-shot to 250-shot maybe its the Hawaii thing...but none of you times have ever seems right on for your mods. if you simply werent using the extra nitrous you'd have either blown it out the front, or had a shitload of unburned crap out of the tailpipes. is you tb actually opening all the way (i remember a question about that), is your comparession still 9.5:1 or so? whats the deal?
04-15-2002, 02:44 PM
#10
Re: Very little gain going from 150-shot to 250-shot Don't think LEAN is the issue.
PSJ...define "driving through the converter". Never heard that before.
The noid should be fine. It's the one TNT supplies for the 250-shot (F2 kit).
CR is now roughly 10:1. I think I may have issues with my coils. I may get new ones. Since I had a short earlier, I am wondering if they are supplying enough fire to light off the extra fuel/gas.
Todd
PSJ...define "driving through the converter". Never heard that before.
The noid should be fine. It's the one TNT supplies for the 250-shot (F2 kit).
CR is now roughly 10:1. I think I may have issues with my coils. I may get new ones. Since I had a short earlier, I am wondering if they are supplying enough fire to light off the extra fuel/gas.
Todd
04-16-2002, 12:49 AM
#11
04-18-2002, 04:58 AM
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Re: Very little gain going from 150-shot to 250-shot </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Reckless:
<strong>Don't think LEAN is the issue.
PSJ...define "driving through the converter". Never heard that before.
The noid should be fine. It's the one TNT supplies for the 250-shot (F2 kit).
CR is now roughly 10:1. I think I may have issues with my coils. I may get new ones. Since I had a short earlier, I am wondering if they are supplying enough fire to light off the extra fuel/gas.
Todd</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Could he mean its too much power for the converter and its not letting the RPMs drop down, due to it not being tight enough.
<strong>Don't think LEAN is the issue.
PSJ...define "driving through the converter". Never heard that before.
The noid should be fine. It's the one TNT supplies for the 250-shot (F2 kit).
CR is now roughly 10:1. I think I may have issues with my coils. I may get new ones. Since I had a short earlier, I am wondering if they are supplying enough fire to light off the extra fuel/gas.
Todd</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Could he mean its too much power for the converter and its not letting the RPMs drop down, due to it not being tight enough.
04-18-2002, 01:20 PM
#14
Re: Very little gain going from 150-shot to 250-shot The entire kit is "as sent" by TNT. I would think the hardware is all matched for flowing 250-shots. I was wondering myself at one point. I have decided to sell the kit. I am moving soon and I want to go to direct port after I move.
Todd
Todd
04-18-2002, 01:32 PM
#15
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Re: Very little gain going from 150-shot to 250-shot F2 kits show a clear increase in power going from the 150 jets to the 200 jets. I have heard the gain going to th 250 jets can be very slight.
Anyway, you'd have to look at whether the issue is having too much converter, or you don't have enuff fuel, or other issues.
IMO you should go 130mph with the 200 jets with the bottle at 900-1000 psi.
Anyway, you'd have to look at whether the issue is having too much converter, or you don't have enuff fuel, or other issues.
IMO you should go 130mph with the 200 jets with the bottle at 900-1000 psi.
04-18-2002, 02:19 PM
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Re: Very little gain going from 150-shot to 250-shot May or may noy be your issue, but related to the topic's direction abit...what about your hose routing, fittings, etc. Overall setup can have an impact when trying to flow that much. Also, fuel drop out? Although, I doubt since you're not lean.
04-20-2002, 06:33 PM
#17
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Re: Very little gain going from 150-shot to 250-shot this may explain my situation, i have the TNT F2 kit jetted for 250 but its only pulling 178 or so to the wheels, what do you think. Its on a 422
that pulls 460 to the wheels NA, any thoughts ?
that pulls 460 to the wheels NA, any thoughts ?
04-22-2002, 01:53 PM
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Re: Very little gain going from 150-shot to 250-shot is every one lowering their shift points on the juice...if not, that may be an issue as well. shift points too high and just too big a verter.
04-22-2002, 03:34 PM
#20
Re: Very little gain going from 150-shot to 250-shot I guess I may have stalled the Yank too high. Didn't know it was such a factor for nitrous. The TNT is sold to a local guy. I will be going to DP after I move <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Once again, fuel is not the issue. Look at my fuel system: www.turbo-ws6.com/fuel.html
Once again, fuel is not the issue. Look at my fuel system: www.turbo-ws6.com/fuel.html