as said, i need to sweetspot my impy so the air flow is all nice,running a low pressure max flo, gas thru grip and a voodoo lpc.. any ideaS?
How do you sweet spot an impy?
- Thread starter L J
- Start date
http://www.impulseownersgroup.com/faq.html#T3
Differs a bit if you have a LPR, but im guessing you don't!
Differs a bit if you have a LPR, but im guessing you don't!
heres a map that is posted on pbnation.... the optimnal weight of the impy internals is about 1200grains and lighter bolt & pin and heavier hammer & shaft!
Bolts, Bolt Pins, Hammers, Rams, Total weight, Total Cost
ND Equalizer($34), Stock Pin, Rat Hole SS($20), ND slick shot($26), 1220 grains, $ 80.00
ND Equalizer($34), Ti pin($22), Rat Hole SS($20), ND slick shot($26), 1107 grains, $102.00
ND Equalizer($34), Ti pin($22), ND SS($18), ND slick shot($26), 1421 grains, $ 99.00
ND Equalizer($34), Ti pin($22), Eclipse Ti($18), ND slick shot($26), 1106 grains, $100.00
ND Equalizer($34), Stock Pin, Eclipse Ti($18), ND slick shot($26), 1219 grains, $ 78.00
ND Equalizer($34), Ti pin($22), Evil SS ($30), ND slick shot($26), 1258 grains, $112.00
ND Equalizer($34), Ti pin($22), Eclipse SS($20), ND slick shot($26), 1379 grains, $102.00
ND Equalizer($34), Ti pin($22), Rat Hole SS($20), PC quicksilver($40), 1047 grains, $116.00
ND Equalizer($34), Stock Pin, Rat Hole SS($20), PC quicksilver($40), 1160 grains, $ 94.00
ND Equalizer($34), Stock Pin, Eclipse Ti($18), PC quicksilver($40), 1159 grains, $ 92.00
ND Equalizer($34), Stock Pin, Rat Hole B($13), PC quicksilver($40), 1214 grains, $ 87.00
ND Equalizer($34), Stock Pin, Rat Hole B($13), ND slick shot ($26), 1274 grains, $ 73.00
ND Equalizer($34), Delrin($15), Rat Hole B($13), ND slick shot ($26), 1092 grains, $ 88.00
ND equalizer($34), ti pull pin($22), Rat Hole B($13), ND slick shot ($26), 1161 grains, $ 95.00
VooDoo($36), Stock pin, Stock Hammer, Stock Ram, 1177 grains, $ 36.00
VooDoo($36), Ti pin($22), Rat Hole SS($20), ND slick shot($26), 1217 grains, $104.00
VooDoo($36), Ti pin($22), Rat Hole SS($20), PC quicksilver($40), 1157 grains, $118.00
VooDoo($36), Ti pin($22), Rat Hole B($13), PC quicksilver($40), 1211 grains, $111.00
VooDoo($36), Delrin($15), Rat Hole SS($20), ND slick shot($26), 1145 grains, $ 97.00
VooDoo($36), Delrin($15), ND SS($18), PC quicksilver($40), 1293 grains, $ 78.00
VooDoo($36), Ti pin($22), Rat Hole SS($20), Stock Ram, 1183 grains, $ 78.00
VooDoo($36), Ti pin($22), ND SS($18), PC quicksilver($40), 1362 grains, $116.00
VooDoo($36), Delrin($15), ND SS($18), Demonic H.P.($40), 1184 grains, $109.00
VooDoo($36), Ti pin($22), ND SS($18), Demonic H.P.($40), 1253 grains, $116.00
VooDoo($36), Delrin($15), ND SS($18), Eclipse Ti($20), 1220 grains, $ 89.00
Voodoo($36), stock pin, stock hammer, Slik-shot($26), 1211 grains, $ 62
Voodoo($36), Stock Pin, Eclipse TI Hammer and Shaft($30), 1196 grains, $ 66
enjoy
Bolts, Bolt Pins, Hammers, Rams, Total weight, Total Cost
ND Equalizer($34), Stock Pin, Rat Hole SS($20), ND slick shot($26), 1220 grains, $ 80.00
ND Equalizer($34), Ti pin($22), Rat Hole SS($20), ND slick shot($26), 1107 grains, $102.00
ND Equalizer($34), Ti pin($22), ND SS($18), ND slick shot($26), 1421 grains, $ 99.00
ND Equalizer($34), Ti pin($22), Eclipse Ti($18), ND slick shot($26), 1106 grains, $100.00
ND Equalizer($34), Stock Pin, Eclipse Ti($18), ND slick shot($26), 1219 grains, $ 78.00
ND Equalizer($34), Ti pin($22), Evil SS ($30), ND slick shot($26), 1258 grains, $112.00
ND Equalizer($34), Ti pin($22), Eclipse SS($20), ND slick shot($26), 1379 grains, $102.00
ND Equalizer($34), Ti pin($22), Rat Hole SS($20), PC quicksilver($40), 1047 grains, $116.00
ND Equalizer($34), Stock Pin, Rat Hole SS($20), PC quicksilver($40), 1160 grains, $ 94.00
ND Equalizer($34), Stock Pin, Eclipse Ti($18), PC quicksilver($40), 1159 grains, $ 92.00
ND Equalizer($34), Stock Pin, Rat Hole B($13), PC quicksilver($40), 1214 grains, $ 87.00
ND Equalizer($34), Stock Pin, Rat Hole B($13), ND slick shot ($26), 1274 grains, $ 73.00
ND Equalizer($34), Delrin($15), Rat Hole B($13), ND slick shot ($26), 1092 grains, $ 88.00
ND equalizer($34), ti pull pin($22), Rat Hole B($13), ND slick shot ($26), 1161 grains, $ 95.00
VooDoo($36), Stock pin, Stock Hammer, Stock Ram, 1177 grains, $ 36.00
VooDoo($36), Ti pin($22), Rat Hole SS($20), ND slick shot($26), 1217 grains, $104.00
VooDoo($36), Ti pin($22), Rat Hole SS($20), PC quicksilver($40), 1157 grains, $118.00
VooDoo($36), Ti pin($22), Rat Hole B($13), PC quicksilver($40), 1211 grains, $111.00
VooDoo($36), Delrin($15), Rat Hole SS($20), ND slick shot($26), 1145 grains, $ 97.00
VooDoo($36), Delrin($15), ND SS($18), PC quicksilver($40), 1293 grains, $ 78.00
VooDoo($36), Ti pin($22), Rat Hole SS($20), Stock Ram, 1183 grains, $ 78.00
VooDoo($36), Ti pin($22), ND SS($18), PC quicksilver($40), 1362 grains, $116.00
VooDoo($36), Delrin($15), ND SS($18), Demonic H.P.($40), 1184 grains, $109.00
VooDoo($36), Ti pin($22), ND SS($18), Demonic H.P.($40), 1253 grains, $116.00
VooDoo($36), Delrin($15), ND SS($18), Eclipse Ti($20), 1220 grains, $ 89.00
Voodoo($36), stock pin, stock hammer, Slik-shot($26), 1211 grains, $ 62
Voodoo($36), Stock Pin, Eclipse TI Hammer and Shaft($30), 1196 grains, $ 66
enjoy
yea i know that, this is about sweet spottting the impy so its very good on the chronom my grain is running at about 1400 which is what i want as 1200 isnt a dead on mark
well to sweet spot yer imp you just need to set your input pressure to about 160psi and keep the dwell in the about middle...
then just up the input pressure until it shoots in the 280 region and then play with the dwell...
thats what i did!
then just up the input pressure until it shoots in the 280 region and then play with the dwell...
thats what i did!
Bit of a question really, as you will get 50 different answers... I do it by feel alone pretty much, then take it the chrono and it's always in the 275-295 range.
Obviously you only have two things to adjust if you don't have an LPR: the input pressure and the dwell. Some people tell you to slowly increase the dwell over the chrono until the velocity stops increasing dramatically, and then turn it down a couple of clicks. Other people say get the dwell at the lowest setting that fires consistently, then crank up the pressure to the right velocity. The right answer is probably "somewhere between these two extremes."
Mine shoots consistently at about 6 clicks, and maxes out at 25ish, but I set the dwell to 12, set the LPR so it cycles without shootdown then up a touch, then set the input pressure to 'feel' about right. Fine adjustments to get it up to 290-300 are on the LPR. My internals are completely different to yours, so yours will be different (easier though, you don't have 3 things to twiddle!)
Two things to remember: generally lower dwell and higher pressure will give you better efficiency; however, FSDO and inconsistency are more likely to happen with very low dwells. At the end of the day, it feels different depending on how you set it up, so get it feeling good for you
Obviously you only have two things to adjust if you don't have an LPR: the input pressure and the dwell. Some people tell you to slowly increase the dwell over the chrono until the velocity stops increasing dramatically, and then turn it down a couple of clicks. Other people say get the dwell at the lowest setting that fires consistently, then crank up the pressure to the right velocity. The right answer is probably "somewhere between these two extremes."
Mine shoots consistently at about 6 clicks, and maxes out at 25ish, but I set the dwell to 12, set the LPR so it cycles without shootdown then up a touch, then set the input pressure to 'feel' about right. Fine adjustments to get it up to 290-300 are on the LPR. My internals are completely different to yours, so yours will be different (easier though, you don't have 3 things to twiddle!)
Two things to remember: generally lower dwell and higher pressure will give you better efficiency; however, FSDO and inconsistency are more likely to happen with very low dwells. At the end of the day, it feels different depending on how you set it up, so get it feeling good for you
the guys on ecstacy run there wicked fast guns on
200 psi output, but just put the dwell down
kyle
200 psi output, but just put the dwell down
kyle
i have a strange impulse with Ndz valve, rat hole hammer, slik shot ram, Ndz ram housing, Ndz stubby bolt, and Ndz full flow. i run my dwell at 9 beeps (6.75ms) and my pressure at 135-140psi shooting at 285-300fps. i get around 1200-1300 shots off a 72ci/4500 tank