That would be NO....
Ellis runs the same cam in his car....170 rwhp shot and the car went from 11.5's-11.6's to 10.32 gaining 17 miles an hour in trap speed (DA 2500-2800). I have used a 250 on aggressive lsa cammed cars and gained the correct mile an hour and time for that givin shot. MY guess is the 250 shot is near the break even point vs. a wider lsa (112-114).

I run a VIG converter. It's only till you get over 3200 rated stall that they become a turd (unfortunatly you have the bigger rated stall). My PI 3200 flashes to almost 4400rpm on my stroker and 5100 or so on the jug........So, from what I'v seen on my verter it's very likely your converter is knocking most of your power down. If we could see the graphs we might be able to tell if the verter is blowing through really bad...

 

I had a coan conveter which is (JUNK!!!!!!!!!!!!!!!!!!!) and on 200 pills gained about 150. Then I changed to Yank and on the 200 gained 200rwhp. So I think everyone is correct when they said your converter isn't working for you. CHANGE IT!

 

what do you mean 250 shot is near the break even point? If it is blowing through the converter, then what would it look like on a dyno graph?

 

The strange think is I had a tci ultimate street fighter 3800 that only stalledto about 2900 on the brake(I don't make very much torque N/A). Same thing would happen, I'd only pickup about 150 on the 200 shot. Nitrous restrcition? I had a six speed before and it put down almost 160 on the 150 shot. I recently went to the dyno and did not even pickup 3 hp going form the 200 to the 250. The weird thing is the jets were 26n 24f with the 200 shot(should have been 20f) and 28n and 24f. I didn't even touch the fuel pressure 4.5 psi between the two settings(11.4-11.8 AFR both jettings), thats why I think I have a restriction problem. The other odd thing is that with jon at NX said I should be running at about 10psi for fuel, but if I do that, the afr is so rich it doesn't even show up on the chart.

 

what size feed line are you using ? -4 -6 ? my cars -4 topped out at 200 and no matter what would not pick up more switched to a -6 and picked up power

 

how much more power, what size shot? It is a -4line, I'm going to do a flow test this weekend, and hopefully find out more.

 

which direct port kit do you have?

 

The kit is the NX Pro EFI #10008

 

Well I figured my converter slippage. I have 3.73 gears, 1.1 tranny ratio, I figures my rpm and mph, and tire diameter. Sliipage N/A is about 7.7 % and on the bottle it is about 18.5%. Much assumption is that anything above 150 was just blowing through. I did run 6.92 on a 200 shot. Since them I've bumped up the nitrous and took off almost 200 lbs. Hopefully I'll get my converter situation figured out. By "tightening" up the converter from 4000 N/A to to 3500 N/A will keep the nitrous from blowing through and lipping. Any ideas on what I should have it stalled to N/A? Apperently Vigilante will only stall in 400-500 rpm increments.

 

no, you need a converter that's built to handle the nitrous spike. If you get one that's right, it will still flash as high as you want, but the slippage will be alot less.

You need to call a good conveter company, and talk to them abotu what youre experiencing. For a good converter that will do what you need it to do, expect to pay in teh 1200 dollar range or higher. With the right converter, you will probably pick up a good amount over what you are doing now, with the ig shot I'd suspect at least another 1/4 second.

Start looking at some of the higher grade stuff, you won't regret it.

 

guys spraying 250+, what brand/stall converters are you running?

 

Think I already told ya, but i'm runnin a Yank SS4000E, it stalls to 3800 on the brake and flashes to about 5100 off the line when the spray hits and has handled a 350 shot.

 

Devon, are you running a th350 or 400? Also how much was your converter?

 

Th-400, and I think they're around $900 - $1000 new, but I got lucky, got it off a buddy for $600 slightly used, had very low mileage and was gonna be his nitrous stall, but he decided never to spray and sold it too me.

 

ATI or Chance .. best in my opinion

 

I agree with that too, but I got my Yank for a killer deal and it's working very nicely, but if I ever change it, it'll be a Chance or ATI.

 

yank is definitly next in line..
I used to be a local of chance.... IMO bar none the best,, but very pricy