Low power 2.4 build
#11
Thats about what your gonna make. Think of it like this. a F24 stock bore is only 2.35L. Thats only 150ishcc larger then a F22. If an F22 Makes 220whp the F24 all things being the same will only make the difference in displacement more. Thats 6.8%. So 220hp x 1.068 = 235hp. So your right in line. When you factor in the RPM loss it's nearly a wash. (hence why ballade is doing the long rod setup to try to get some more RPM back) You've gotta spend some money on cams and intake manifold if you wanna make more. When I originally did my K24 swap I did a stock bore 12:1 K24 in the S2000 with a stock throttle body and stock intake manifold and small cams. I made a whopping 237whp. It was a HUGE disappointment. Same bottom end different cams, different intake manifold and different throttle body the car made 267whp. I've learned a lot and several motors and different mods later I've finally cranked it up over 300. But it still makes like 290 at 7500. The Key is to Bore em. My car found a ton of power boring it out to a 89.5mm. I've also found bumping compression doesnt help as much as you would think. Stick with your 12.5:1
Last edited by Mrsideways; 08-14-2017 at 08:41 AM.
#12
Upgrading the intake manifold helped me unlock a nice gain on my 2.4L
See:
https://www.s2ki.com/forums/s2000-na.../#post24192807
https://www.s2ki.com/forums/s2000-na.../#post24218897
But I have other supporting mods (custom 3.5" intake, urge "stroker" exhaust header, urge exhaust w/ dual T1R).
See:
https://www.s2ki.com/forums/s2000-na.../#post24192807
https://www.s2ki.com/forums/s2000-na.../#post24218897
But I have other supporting mods (custom 3.5" intake, urge "stroker" exhaust header, urge exhaust w/ dual T1R).
#13
Upgrading the intake manifold helped me unlock a nice gain on my 2.4L
See:
https://www.s2ki.com/forums/s2000-na.../#post24192807
https://www.s2ki.com/forums/s2000-na.../#post24218897
But I have other supporting mods (custom 3.5" intake, urge "stroker" exhaust header, urge exhaust w/ dual T1R).
See:
https://www.s2ki.com/forums/s2000-na.../#post24192807
https://www.s2ki.com/forums/s2000-na.../#post24218897
But I have other supporting mods (custom 3.5" intake, urge "stroker" exhaust header, urge exhaust w/ dual T1R).
#14
I have with previous setups, but not with the latest. I have also been dyno'd on a mustang dyno. Yes, both are lower. But the before vs after that I showed from Evans is still very useful to show percentage gains just from the IM upgrade.
#15
I think the big myth that needs to be dispelled on the F24 is people think they can increase stroke by 7% and pick up 60hp. It simply doesn't work like that. The stroke increase gives you the ability to pull more air but you've got a crap load of work to do on top of that to actually show more then a 7% power gain. Horse power Gains N/A out of a motor already making over 100hp per liter are not easy.
#16
Thread Starter
yep, Great dyno for tuning, bad dyno for telling how much power you actually make.
I think the big myth that needs to be dispelled on the F24 is people think they can increase stroke by 7% and pick up 60hp. It simply doesn't work like that. The stroke increase gives you the ability to pull more air but you've got a crap load of work to do on top of that to actually show more then a 7% power gain. Horse power Gains N/A out of a motor already making over 100hp per liter are not easy.
I think the big myth that needs to be dispelled on the F24 is people think they can increase stroke by 7% and pick up 60hp. It simply doesn't work like that. The stroke increase gives you the ability to pull more air but you've got a crap load of work to do on top of that to actually show more then a 7% power gain. Horse power Gains N/A out of a motor already making over 100hp per liter are not easy.
#17
yep, Great dyno for tuning, bad dyno for telling how much power you actually make.
I think the big myth that needs to be dispelled on the F24 is people think they can increase stroke by 7% and pick up 60hp. It simply doesn't work like that. The stroke increase gives you the ability to pull more air but you've got a crap load of work to do on top of that to actually show more then a 7% power gain. Horse power Gains N/A out of a motor already making over 100hp per liter are not easy.
I think the big myth that needs to be dispelled on the F24 is people think they can increase stroke by 7% and pick up 60hp. It simply doesn't work like that. The stroke increase gives you the ability to pull more air but you've got a crap load of work to do on top of that to actually show more then a 7% power gain. Horse power Gains N/A out of a motor already making over 100hp per liter are not easy.
E.g. this All-motor with AEM infinity search:
Evans Tuning Dyno Graph Database
My 2002 2.4L is the 2 results in the middle. Before the K-series skunk2 ultra race IM I was 258HP/192TQ, after I'm 273HP/201TQ.
The 2001 2.4L is 243HP/178TQ (this one is interesting as it shows my header and exhaust mods to be more effective).
The 2004 AP2 has light-medium mods and gets 221HP/161TQ
Basically, I think you're going overboard questioning the accuracy of Jeff Evans' dynapak. The 2004 AP2 establishes it gets what it should given the mods.
#18
dynos are tuning tools the only "power" you can observe is a percentage change when comparing before and after. this change should be equal on all dynos. the "power" number itself is meaningless.
#19
A good tune can be done on the street, no dyno needed. But seeing numbers is part of calculating the potency of the car. I may be in the minority, but like to know how much power my car makes as it stands alone and compared to mods or other types of cars. Sticking to the same dyno if you can goes a long way towards consistency, but thats not possible for everyone.
#20
Its meaningless, well unless you are building to reach a target.
A good tune can be done on the street, no dyno needed. But seeing numbers is part of calculating the potency of the car. I may be in the minority, but like to know how much power my car makes as it stands alone and compared to mods or other types of cars. Sticking to the same dyno if you can goes a long way towards consistency, but thats not possible for everyone.
A good tune can be done on the street, no dyno needed. But seeing numbers is part of calculating the potency of the car. I may be in the minority, but like to know how much power my car makes as it stands alone and compared to mods or other types of cars. Sticking to the same dyno if you can goes a long way towards consistency, but thats not possible for everyone.
Last edited by Mrsideways; 08-15-2017 at 06:16 AM.