There is so much information about the last 4 dyno's that I've done & the related mods that I thought it would be fair to put them all in 1 thread and go step by step with the mods & power results...
I hope it is helpful to some people who read this forum often... because this is finally a no bull**** thread with dyno & 1/4 mile runs to back it up...
Here we go:
____________________________
Dyno #1. NOV 11 2004:
Baseline run... 128 hp & 121 ft.lb tq. ( GREEN LINE )
This was with a short ram & a custom-cat-back with a magnaflow straight through muffler. All of my other mods were in place...
ported manifold, heat spacer, 1.8L j2 elantra headers, no cats, stock cam sprocket setting, no fuel tuning.
In this dyno, i turned the fuel tuner down on the top end by -4% and i gained 2 whp and 0 torque. ( RED LINE ). So with just fuel tuning there is a 2 whp gain.. mostly insignificant. 130.2 hp & no gain in torque.
Dyno 1:
Nov 30 2004:
I went to the muffler shop and got rid of the straight through muffler, i bought a dynomax super turbo 3 chamber muffler 2 1/2 inch inlet & outlet.
I strapped the car on the dyno and it showed: 123 whp & 117 ft.lb torque.. ( green line ) I FREAKED OUT ! How could I lose power ! ? Is this muffler that restrictive ! ?? NOT THE CASE..
I had the magical idea of resetting the ecu ( unplug the neg terminal of the battery & press the brakes to drain the system) and then plug it back in..
ran the dyno a second time. power went up ! 128 whp and 121 ft.lb tq ! YES, power jumped up by 5 hp & 4 ft.lb tq. Looking at the fuel curve, it is easy to see what just happened... the ecu was running super lean (green fuel curve line) & it was nearly 15:1 air fuel ratio before 4200 rpms, and after it dropped by 2 points... Resetting the ecu flattened the fuel cruve and made it a little richer before 4200 rpms and that made more power...
then i got the idea of using the fuel tuner again... so i set it to -4% and gave it another go... HOLY CRAP !
I gained 4 whp & 5 ft.lb tq MORE ! ( 132.7 hp & 126.8 ft.lb Blue line ) SWEET !!
So basically, the overall gain from going to this new muffler & resetting the ecu was 4 whp & 5 ftlb of torque overall.
Dyno #2:
Dyno #3 Dec 10, 2004:
I had a feeling the car had more power stored away somewhere.. so I decided to tune the cam sprocket.
I bought this sprocket on ebay for $70 new and i had fooled around with it and never really had good results... So it was time to do something about it...
I strapped the car down and gave it a baseline run... the diff from this dyno & the previous one was only 1 whp which is a perfectly acceptable variation.. green line : 131.9 whp & 126.2 ft.lb..
After the baseline, i advaned the cam sprocket by 2 notches on the gear which = 4 degrees of crank advance...
This yielded 2 whp gain & 2 ft.lb wtq gain ...
So i went back and advaned it 2 more notches, for a total of 8 degrees of crank advance...
The results were good, lost .2 hp but gained 2 more ft.lb of wheel torque so i stopped messing with it and locked it down..
the results ? A total of 2 hp gain and 4 ft.lb wtq !!! (133.2 hp & 130.6 ft.lb wtq BLUE LINE )
dyno #3:
Dyno #4 Dec 21 2004:
So lastly, I decided to swap back to a CAI and re-test the car..
The reason for this dyno was two fold.. #1, I had to find out what the possible gains were for this change just for my own knowledge. and #2, I had to have something great to give back to the EXD members who always debate on what the differences are with SRI vs CAI ... I swear i've seen like 28923385 different threads with people arguing about what the differences are.. and i know the dyno does not perfectly simulate real driving conditions but at least we have SOMETHING to base our arguments on instead of just theory..
So I did 3 straight up runs... I did not have the sri installed at the time of this dyno, but you can see dyno # 3 as a comparison..
total gains, 0 hp & 135.6 ft.lb wheel torque ( RED LINE ) .
the other dynos were just less than 1 tenth of a hp variation.. so this is a good baseline for the CAI swap.
So finally, overall there is a 7 hp & 14 ft.lb gain from the original run...
dyno #4:
_________________________________
Lastly, I wanted to mention something about 1/4 mile specs..
My first time out, i had the cam sprocket retarded 12 degrees, this killed the torque and i ran 16.4 1/4 mile.
so i set it back to stock and ran 16.1
Then, i did the muffler swap & went back and this time I ran 15.8 ...
at this time, i have yet to go back to find out what the gains of the cam sprocket & cai COMBINATION will yield, however I feel that i should be able to run faster than 15.5 ...
Ok everybody, after $300 in dyno fees & about $1000 in stupid mods, you have some quantifiable results to compare your own mods to... Also, there are many things yet to be tested that I most likely will never do.. such as a light weight crank pulley, & fidanza flywheel, MSD ignition and etc.....
Thanks alot for reading through this post and I hope a mod makes it a sticky.... :bowdown:
I hope it is helpful to some people who read this forum often... because this is finally a no bull**** thread with dyno & 1/4 mile runs to back it up...
Here we go:
____________________________
Dyno #1. NOV 11 2004:
Baseline run... 128 hp & 121 ft.lb tq. ( GREEN LINE )
This was with a short ram & a custom-cat-back with a magnaflow straight through muffler. All of my other mods were in place...
ported manifold, heat spacer, 1.8L j2 elantra headers, no cats, stock cam sprocket setting, no fuel tuning.
In this dyno, i turned the fuel tuner down on the top end by -4% and i gained 2 whp and 0 torque. ( RED LINE ). So with just fuel tuning there is a 2 whp gain.. mostly insignificant. 130.2 hp & no gain in torque.
Dyno 1:
Nov 30 2004:
I went to the muffler shop and got rid of the straight through muffler, i bought a dynomax super turbo 3 chamber muffler 2 1/2 inch inlet & outlet.
I strapped the car on the dyno and it showed: 123 whp & 117 ft.lb torque.. ( green line ) I FREAKED OUT ! How could I lose power ! ? Is this muffler that restrictive ! ?? NOT THE CASE..
I had the magical idea of resetting the ecu ( unplug the neg terminal of the battery & press the brakes to drain the system) and then plug it back in..
ran the dyno a second time. power went up ! 128 whp and 121 ft.lb tq ! YES, power jumped up by 5 hp & 4 ft.lb tq. Looking at the fuel curve, it is easy to see what just happened... the ecu was running super lean (green fuel curve line) & it was nearly 15:1 air fuel ratio before 4200 rpms, and after it dropped by 2 points... Resetting the ecu flattened the fuel cruve and made it a little richer before 4200 rpms and that made more power...
then i got the idea of using the fuel tuner again... so i set it to -4% and gave it another go... HOLY CRAP !
I gained 4 whp & 5 ft.lb tq MORE ! ( 132.7 hp & 126.8 ft.lb Blue line ) SWEET !!
So basically, the overall gain from going to this new muffler & resetting the ecu was 4 whp & 5 ftlb of torque overall.
Dyno #2:
Dyno #3 Dec 10, 2004:
I had a feeling the car had more power stored away somewhere.. so I decided to tune the cam sprocket.
I bought this sprocket on ebay for $70 new and i had fooled around with it and never really had good results... So it was time to do something about it...
I strapped the car down and gave it a baseline run... the diff from this dyno & the previous one was only 1 whp which is a perfectly acceptable variation.. green line : 131.9 whp & 126.2 ft.lb..
After the baseline, i advaned the cam sprocket by 2 notches on the gear which = 4 degrees of crank advance...
This yielded 2 whp gain & 2 ft.lb wtq gain ...
So i went back and advaned it 2 more notches, for a total of 8 degrees of crank advance...
The results were good, lost .2 hp but gained 2 more ft.lb of wheel torque so i stopped messing with it and locked it down..
the results ? A total of 2 hp gain and 4 ft.lb wtq !!! (133.2 hp & 130.6 ft.lb wtq BLUE LINE )
dyno #3:
Dyno #4 Dec 21 2004:
So lastly, I decided to swap back to a CAI and re-test the car..
The reason for this dyno was two fold.. #1, I had to find out what the possible gains were for this change just for my own knowledge. and #2, I had to have something great to give back to the EXD members who always debate on what the differences are with SRI vs CAI ... I swear i've seen like 28923385 different threads with people arguing about what the differences are.. and i know the dyno does not perfectly simulate real driving conditions but at least we have SOMETHING to base our arguments on instead of just theory..
So I did 3 straight up runs... I did not have the sri installed at the time of this dyno, but you can see dyno # 3 as a comparison..
total gains, 0 hp & 135.6 ft.lb wheel torque ( RED LINE ) .
the other dynos were just less than 1 tenth of a hp variation.. so this is a good baseline for the CAI swap.
So finally, overall there is a 7 hp & 14 ft.lb gain from the original run...
dyno #4:
_________________________________
Lastly, I wanted to mention something about 1/4 mile specs..
My first time out, i had the cam sprocket retarded 12 degrees, this killed the torque and i ran 16.4 1/4 mile.
so i set it back to stock and ran 16.1
Then, i did the muffler swap & went back and this time I ran 15.8 ...
at this time, i have yet to go back to find out what the gains of the cam sprocket & cai COMBINATION will yield, however I feel that i should be able to run faster than 15.5 ...
Ok everybody, after $300 in dyno fees & about $1000 in stupid mods, you have some quantifiable results to compare your own mods to... Also, there are many things yet to be tested that I most likely will never do.. such as a light weight crank pulley, & fidanza flywheel, MSD ignition and etc.....
Thanks alot for reading through this post and I hope a mod makes it a sticky.... :bowdown: