Re: k20a2 head on k24a8

[timot_one]

All good points, and we know it's possible to make good power with proper valvetrain upgrades.  The original debate was about a bone stock K24A2 making 220 hp.  It's not fair to compare a K24 bottom end with a higher flowing A2 head and the more aggressive Type R cams.  I just don't think it's a fair comparison.

[BliNx197]

^No the ITR cams arent more aggressive, perhaps the Vtec lobe is larger(but I dont believe it is) but the lower lobes on an a2 are larger. As for the head not sure there are extreme differences on a k20 head vs. k24a2 head. But Ill find a stock a2 head dyno just so we can be accurate. I saw one on Evans-Tuning.com a few days ago! Ill check there

[timot_one]

From what I recall, the Type R cams are a desired upgrade for the Type S guys.  I'm not sure what the specific benefits are, or what the actual difference is with the cam profiles.  Without the specs, I can't be 100% sure I'm right though.  I would assume that people would want the ITR cams for a reason though.

[BliNx197]

The type R cams are the same as the k20z1 cams from what Ive heard,.. kind of hard to get JDM part #s but Ive heard that numerous times. And looking at a thread where someone actually compared both cams (wanna say they are z1s and not a2s I could be mistaken tho) to the k24a2 cams and the TSXs had larger low lobes but a slightly smaller vtec lobe. So overall the TSXs were better because the difference between the TSX low lobe and k20 low lobe was greater than the difference between the twos vtec lobe. <---- that was wordy! Ill find the post tho

[BliNx197]

http://k20a.org/forum/showthread.php?t=43261&highlight=k20z3+cams

Heres the link and proved myself wrong in the process on one thing, the z1 cams are not Type R cams, sooo yea not sure where they fall but as it shows just the 04-05 TSX cams were larger than 02-04 RSX-S cams

[ADI]

well here a dyno of a k24a2 stock bottom end stock head

the only mods are bolts ons

rbc intake manifold
asp short ram intake
oem k20a2 (intake cam) - bigger vtec lobe
asp 4-1 race header
kpro
50 degree VTC gear

**K20a2 intake cam = 12.27mm lift
**K24a2 intake cam = 11.45mm lift

Vtec engagement at wot is at 3500 rpm and at part throttle is at 5000 rpm

[BliNx197]

Great Find ADI! As it stands I plan to upgrade to aftermarket cams but if I were going OEM id go TSX. Just because I know I enjoy having more power off the line than extreme top end. And after a S/Cer is installed top end wont need the extra kick that a k20 vtec lobe gives. Just an overall better power balance IMO. although I have seen the mix and match of the TSX exhaust and k20 cam a lot.

[clapton924]

well here a dyno of a k24a2 stock bottom end stock head

the only mods are bolts ons

rbc intake manifold
asp short ram intake
oem k20a2 (intake cam) - bigger vtec lobe
asp 4-1 race header
kpro
50 degree VTC gear

**K20a2 intake cam = 12.27mm lift
**K24a2 intake cam = 11.45mm lift

Vtec engagement at wot is at 3500 rpm and at part throttle is at 5000 rpm

Like Tim said a few lines up...my argument was regarding a bone stock k24a2

^^
This is not a stock engine....sure you can get these numbers with a modified cams and kpro.

To put an end to this debate...taken from Hondata.com

K24A2 Stock : 184hp / 165 ft/lbs torque

[ADI]

well here a dyno of a k24a2 stock bottom end stock head

the only mods are bolts ons

rbc intake manifold
asp short ram intake
oem k20a2 (intake cam) - bigger vtec lobe
asp 4-1 race header
kpro
50 degree VTC gear

**K20a2 intake cam = 12.27mm lift
**K24a2 intake cam = 11.45mm lift

Vtec engagement at wot is at 3500 rpm and at part throttle is at 5000 rpm

Like Tim said a few lines up...my argument was regarding a bone stock k24a2

^^
This is not a stock engine....sure you can get these numbers with a modified cams and kpro.

To put an end to this debate...taken from Hondata.com

K24A2 Stock : 184hp / 165 ft/lbs torque

you can straight up swap to a K24A2 and wait for hondata to release an EMS solution for your application.  If you're not happy with around 220whp with a stock TSX motor you can opt for better cams or a blower and that will bump you up considerably...

im sure what skip meant was a stock motor with bolt ons and kpro, as in no valve train mods, touching the head or bottom end of the block (220whp is very easy 2 achieve), which is why he mention 2 wait til hondata releases an EMS.

[BliNx197]

Not pertaining to previous posts but i thought this was pretty incredible

The power of E85

245 whp on a stock k24a1 bottom end(didnt mention a k20 oil pump either?) w/k20a head running E85, and bolt-ons
http://forums.evans-tuning.com/viewtopic.php?f=28&t=5284