Thread: HP gains, I'm just curious
09-25-2009, 01:21 PM #1
HP gains, I'm just curious
So with all the mods we do, what are the actual HP gains we see. And for every x amount of rpm = x? of hp
Riva or similar intake
Riva free flow exhaust (07)
Riva water box
6 degree timing mod
09 pistons/cams = 10hp
ecu with the above mods
Last edited by Hooah_Killer; 09-25-2009 at 01:38 PM. Reason: added stuff
09-25-2009, 08:13 PM #2
Ok surely there is an answer to these it doesn't hAve to be exact
09-25-2009, 08:35 PM #3
Im sure you could do some calculations based on 250 hp at x horespower and rpm, then use a calculator similar to a drag time calculator and based on that and your increased rpm you could figure out horsepower, I think this would only work with the stock prop though, you have to keep one thing in a system constant to solve for another.
09-26-2009, 12:33 AM #4
i suppose it could be done that way, but it would be nice to know what actual HP increases we see with each add on component. 1 hp for the exhaust for example, 5 hp fpr the timing mod, etc etc. After all mods i'd say I gained about 300 plus rpms but what does that mean in hp increase. But again I have an impros modded stock impeller. Maybe im anal but i like to know that data.
09-26-2009, 10:30 AM #5
Hooah what kind of increase in top speed did you get with the impros mod? and what level or mod did you get done? just curious, I was thinking about sending off my pump to them but want input first
09-26-2009, 11:48 AM #6
for that i would say you need to dyno it then,
09-26-2009, 11:26 PM #7
i guess i'm used to automotive...cold air induction 5 hp, headers 10 hp, porting of heads 10 - 20 hp, performace intake manifold 30 hp and so on....
adding race exhaust on my old zx7rr 5hp, porting heads and valve train/cam work 15-20 hp, and so on...
surely riva would know how m a uch hp increase the free flow gives, if the 6 deg timing mod give you up to 300 rpms tht has to = a certain amount of hp,......i know jw on the 250xtech site did some calculations of hp on his site so i suppose we can calculate the the hp increase from there
and to answer the question about impros mod and what it contributed to my speed???? i dunno my best stock was 66.5 running on empty my best this year after all the mods was 70.9 but i do know it was a factor and worth the cost
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