turboed ss Posted March 23, 2010 Report Share Posted March 23, 2010 I went to the Dyno today just to find out that i need new plug wires and need to change my plug gap from .35 to .30 so i can turn up the boost.... What do u think???? Good starting #s.... Ill be turning it up to 17lb for a high maybe 18lbs!!!!! Oh and this is only 10 degrees timing.... Quote Link to comment Share on other sites More sharing options...
shadowsniper3006 Posted March 23, 2010 Report Share Posted March 23, 2010 (edited) what do i see around 5500? is the converter locking or is it shifting to 3rd? Edited March 23, 2010 by shadowsniper3006 (see edit history) Quote Link to comment Share on other sites More sharing options...
turboed ss Posted March 23, 2010 Author Report Share Posted March 23, 2010 what do i see around 5500? is the converter locking or is it shifting to 3rd? thats 5252rpm that is were hp/tq cross pathes... im pretty sure all car/trucks cross in the same place.... i think Quote Link to comment Share on other sites More sharing options...
brobradh77 Posted March 23, 2010 Report Share Posted March 23, 2010 giggity giggity Quote Link to comment Share on other sites More sharing options...
shadowsniper3006 Posted March 24, 2010 Report Share Posted March 24, 2010 (edited) thats 5252rpm that is were hp/tq cross pathes... im pretty sure all car/trucks cross in the same place.... i think every combo is diff and will cross at a diff place. However it looks like the blue line is the only one with out a shift point or a converter lock. Was your converter locked for the pulls or do you remember the truck shifting during the pull? i made a mistake in my first post i ment around 4000 rpm. Edited March 24, 2010 by shadowsniper3006 (see edit history) Quote Link to comment Share on other sites More sharing options...
turboed ss Posted March 24, 2010 Author Report Share Posted March 24, 2010 every combo is diff and will cross at a diff place. However it looks like the blue line is the only one with out a shift point or a converter lock. Was your converter locked for the pulls or do you remember the truck shifting during the pull? i made a mistake in my first post i ment around 4000 rpm. oh its locked in 3rd gear so it was probably the converter Quote Link to comment Share on other sites More sharing options...
chpspecial Posted March 24, 2010 Report Share Posted March 24, 2010 every combo is diff and will cross at a diff place. However it looks like the blue line is the only one with out a shift point or a converter lock. Was your converter locked for the pulls or do you remember the truck shifting during the pull? i made a mistake in my first post i ment around 4000 rpm. due to the Horspower formula and the fact that its based on torque, the horspower/torque curves will alway cross at 5252 hp = ((tq*rpm)/5252) where 5252 is always a constant and therefore at 5252 rpm tq=hp. at 4000 rpm something is going on... might be the TC locking. Quote Link to comment Share on other sites More sharing options...
turboed ss Posted March 24, 2010 Author Report Share Posted March 24, 2010 due to the Horspower formula and the fact that its based on torque, the horspower/torque curves will alway cross at 5252 hp = ((tq*rpm)/5252) where 5252 is always a constant and therefore at 5252 rpm tq=hp. at 4000 rpm something is going on... might be the TC locking. thanks for clarifing that for me... also lets keep in mine the blue run is on the old motor back in august... the blue run was the best i ever saw the old motor... it was never tuned properly and there was something never quite right with the old motor... so the only 2 pulls we did on the new motor are the red and green pulls... Quote Link to comment Share on other sites More sharing options...
shadowsniper3006 Posted March 24, 2010 Report Share Posted March 24, 2010 (edited) due to the Horspower formula and the fact that its based on torque, the horspower/torque curves will alway cross at 5252 hp = ((tq*rpm)/5252) where 5252 is always a constant and therefore at 5252 rpm tq=hp. at 4000 rpm something is going on... might be the TC locking. can you explain that anymore? where does the 5252 rpm come from. There are so many things that can change peak hp and torque along with the duration of each curve untill it peaks and the rate at which it drops off. I guess i'm not understanding how that can be true? my truck crosses at 5400-5500. Thanks Edited March 24, 2010 by shadowsniper3006 (see edit history) Quote Link to comment Share on other sites More sharing options...
04CHASE Posted March 24, 2010 Report Share Posted March 24, 2010 how come you gained 30 hp but lost 9 lbs torque? in the two new runs ? Quote Link to comment Share on other sites More sharing options...
chpspecial Posted March 24, 2010 Report Share Posted March 24, 2010 can you explain that anymore? where does the 5252 rpm come from. There are so many things that can change peak hp and torque along with the duration of each curve untill it peaks and the rate at which it drops off. I guess i'm not understanding how that can be true? my truck crosses at 5400-5500. Thanks The 5252 in not the RPM it is just a constant that some one came up with to corolate HP to TQ. what I posted above is the actual formula that most all dynos use it to convert TQ to HP since they most all can only measure the TQ applied to the wheels and not the actual HP. If your truck is crossing at 5400-5500 rpm its usually due to a miss calculation or a bad RPM pickup. And yes you can alter the HP and TQ curves doing various mods but no matter what mods, both curves will cross at the same point of 5252rpm, Quote Link to comment Share on other sites More sharing options...
shadowsniper3006 Posted March 24, 2010 Report Share Posted March 24, 2010 The 5252 in not the RPM it is just a constant that some one came up with to corolate HP to TQ. what I posted above is the actual formula that most all dynos use it to convert TQ to HP since they most all can only measure the TQ applied to the wheels and not the actual HP. If your truck is crossing at 5400-5500 rpm its usually due to a miss calculation or a bad RPM pickup. And yes you can alter the HP and TQ curves doing various mods but no matter what mods, both curves will cross at the same point of 5252rpm, thanks for explaining it more, i had no idea that is what dyno's are based off of. However i would still like to know why that guy picked 5252 for the constant but i'm sure he's a whole lot smarter then me. Quote Link to comment Share on other sites More sharing options...
chpspecial Posted March 24, 2010 Report Share Posted March 24, 2010 thanks for explaining it more, i had no idea that is what dyno's are based off of. However i would still like to know why that guy picked 5252 for the constant but i'm sure he's a whole lot smarter then me. Yeah me too, and also how they came up as one HP unit of measure = moving 33000 lb of weight one foot per minute. Quote Link to comment Share on other sites More sharing options...
turboed ss Posted March 24, 2010 Author Report Share Posted March 24, 2010 how come you gained 30 hp but lost 9 lbs torque? in the two new runs ? idk only thing i can come up with is the tuner playing with the fuel curve or it misfired sooner than it did the first time... what do u think???????? Quote Link to comment Share on other sites More sharing options...
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