Anyone spray a 200 dry shot?
09-27-2004, 03:03 PM
#1
Anyone spray a 200 dry shot? I sprayed a 125 shot and went 10.55 @129 
That was also only the second pass on my new combo.Think I can get 10.4 out of it the way it sits now
I wanna make it to 10.0 before the year is out.
I think the 200 dry will get me there
Anyone ? how safe is it? (I have forged pistons and ARP rod bolts)
That was also only the second pass on my new combo.Think I can get 10.4 out of it the way it sits nowI wanna make it to 10.0 before the year is out.
I think the 200 dry will get me there
Anyone ? how safe is it? (I have forged pistons and ARP rod bolts)
09-27-2004, 04:49 PM
#2
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I have never heard of anyone spraying that large a dry shot. Some might say that as long as your injectors are sized large enough to handle the HP the it would befine but I would think there would be a point where the MAF would only get so cold and after that it would stop adding extra fuel.
09-27-2004, 05:31 PM
#3
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I spray a 300 dry with 42lb injectors, walbro 255 lph intank, hotwire kit for pump and voltage blaster. Computer was tuned for the injectors. Made 700+ rwhp in two stages for a year and a half beating the **** out of it every weekend. Not 1 problem.
I think a 200 would be just fine as long as you have 42 lb or larger injectors and 255 LPH intank with hotwire kit as well as tuning by someone who is good.
I think a 200 would be just fine as long as you have 42 lb or larger injectors and 255 LPH intank with hotwire kit as well as tuning by someone who is good.
09-27-2004, 07:15 PM
#7
hotwire.. cmon now Brent was a grand national fool.. you run a heavy hot lead right to the pump so it gets FULL voltage. if you want to get REAL pimp, run a Boost-a-pump and feed pump 15-17 volts and itll feed a good bit.
Wayne you need to go back to a stock unported MAF Id vote, descreen it but id want to work with a stock maf table.
383 LQ, did you ever have any problems with the MAF inconsistantly fueling the dry shot, or did you enrich another way? what were your duty cycles and what mph were you running
Wayne you need to go back to a stock unported MAF Id vote, descreen it but id want to work with a stock maf table.
383 LQ, did you ever have any problems with the MAF inconsistantly fueling the dry shot, or did you enrich another way? what were your duty cycles and what mph were you running
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09-27-2004, 07:31 PM
#8
Wayne do some searching on what injectors scale/run the best ive doen lots of 38/42 lb cars, some seem to run easier then others. I personalyl prefer Lucas disc type injectors over pintle stuff, but thats based on design alone not actual back to back testing
09-27-2004, 07:36 PM
#9
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I run a 200 hp shot as my first stage of N20. I do have forged pistons and a completely aftermarket fuel system, using 55lb injectors. The car idles great with no drivability issues.
Oh yeah, it puts down 590hp at the wheels through the injectors.
Oh yeah, it puts down 590hp at the wheels through the injectors.
09-27-2004, 09:45 PM
#11
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yep...42 lbders and stock descreened MAF with an intank pump. The Hotwire kit uses a relay and some heavy gauge wire to power the intank fuel pump. With that setup there is little voltage drop from the alternaotr to the pump. If you have ever seen actual flow rates of a Walbro VS voltage...youll know that this is an important little mod. Voltage blaster like the one Speed Inc sells helps too.
My car runs and idles just fine with the 42 lbders.
I have data logged many many runs on the street and on the dyno...never have I seen any blips or anomolies with the MAF. It is still the original stock 99 MAF. I trust it more than I trust a fuel solinoid.
One thing you need to think about...I made over 700 rwhp through the injectors...but I do it with two stages each coming on a a certain RPM. 1st stage at 3000 rpm...second stage at 4800 rpm. This keeps Tq down between 720-620 rwtq from 3000-6500 rpm. And doing it this way I pretty much go to 100% duty cycle...or just shy. If I were to spray all 300 at 3000 rpm...I would run out of duty cycle at that point by a large margin. From what I understand...max Tq = max duty cycle. Thats why I said I believe you could do approx a 200 shot all at once. I would not go more unless you broke it up in stages based on RPM.
My car runs and idles just fine with the 42 lbders.
I have data logged many many runs on the street and on the dyno...never have I seen any blips or anomolies with the MAF. It is still the original stock 99 MAF. I trust it more than I trust a fuel solinoid.
One thing you need to think about...I made over 700 rwhp through the injectors...but I do it with two stages each coming on a a certain RPM. 1st stage at 3000 rpm...second stage at 4800 rpm. This keeps Tq down between 720-620 rwtq from 3000-6500 rpm. And doing it this way I pretty much go to 100% duty cycle...or just shy. If I were to spray all 300 at 3000 rpm...I would run out of duty cycle at that point by a large margin. From what I understand...max Tq = max duty cycle. Thats why I said I believe you could do approx a 200 shot all at once. I would not go more unless you broke it up in stages based on RPM.
09-28-2004, 02:13 PM
#13
Its an auto car alot of nitrous at low rpm and flashing the converter will be a pain to hook maybe?
max injector pulsewidth usually occurs at max torque. But because of increasing rpm, the "window of opportunity" gets smaller and smaller 20 ms at 6000 rpm is 100% duty cycle I beleive, if you have 20 ms duty cylce above that you over 100%
What about 140 shot all the time and above peak torque, kick in a secodn stage? It never goes below 5000 rpm after the launch anyway. But above that is when injectors are max cycle anyway
max injector pulsewidth usually occurs at max torque. But because of increasing rpm, the "window of opportunity" gets smaller and smaller 20 ms at 6000 rpm is 100% duty cycle I beleive, if you have 20 ms duty cylce above that you over 100%
What about 140 shot all the time and above peak torque, kick in a secodn stage? It never goes below 5000 rpm after the launch anyway. But above that is when injectors are max cycle anyway
09-28-2004, 04:45 PM
#15
Originally Posted by ShiznityZ28
wayne i got some 42 lbs from joe pretty cheep. i like the 2 stage ideah. all you need is a 2nd selinoid you have the lines and stuff. run 150 out the hole and 50 more at 5000 or so .but your gona need a that intank for sure 
.but your gona need a that intank for sure 
10.0 is the target.This would be great at my raceweight. Drive it to OC and back and it runs 10.0 PIMPNESS
you didn't dead hook the 150. 
09-29-2004, 02:13 PM
#19
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The Solenoid is the limiting force. 
A cheater will support just under 300 hp, and a Pro Race will go 450+.
Use a 6an line and it will support 450 as well...
Ideal system, two 6an lines, and a Pro Race Fogger system... And a good broom.
A cheater will support just under 300 hp, and a Pro Race will go 450+.
Use a 6an line and it will support 450 as well...
Ideal system, two 6an lines, and a Pro Race Fogger system...
And a good broom.
09-29-2004, 04:13 PM
#20
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Originally Posted by xaon
with proper tuning for the injectors, it will run just like stock on motor.
I have 42lb injectors and walbro 255LPH intank and have been spraying a 175 shot, i've had no problems whatsoever.
I have 42lb injectors and walbro 255LPH intank and have been spraying a 175 shot, i've had no problems whatsoever.