Ok.. i went back and forth in emails with Matt from Red Shift. What i found out was that you can run a TSX with K-Pro! This is what im gonna need.. an RSX ecu. It will be the piggy back to the TSX ecu and K-Pro. The TSX ecu will continue to run the gauges/AC/Traction control/etc. AND will not disable DBW! while the RSX ecu and K-Pro runs the motor. One problem is finding a harness for this.. A few people have them, i just have to see where i can get this done. I dont think Hondata has this harness or we would've had K-Pro by now because they did something like this for the S2000 already. I might be picking up a K20a2 head this weekend..

 

Let us know how that goes

 

Definitely let us know as soon as you find out. I'll pull the car out of the for sale ads if this can work.

 

Yeah, keep us posted. Hytech had a harness, but I think you lose the gauges, VSA, and a few other things.

 

Did you look into simply having it reflashed with the Grand Am II kit?

 

i saw this thread a few days ago with similar information

http://www.hondata.net/forum/viewtop...ht=k24a2#24815

 

Hytech was advertising this harness with their package.

 

Yeah contact them and see what's up. Good luck, I'd love to see somebody actually do this.

 

I think i want more than this reflash.. that reflash is not with a K20a2 head.. i'd rather go K-Pro for this.

 

I hope you are building the bottom end as well if you want to use a k20a2 head. Over at our Aus forums, someone just shot a rod out of his k20a/k24a combo with BC spec C cams because the limiter was set to 8200rpm. He revved to redline at least 3-4 times each drive and the engine only lasted a few weeks.

 

if u find a FEASIBLE solution you're the man

 

x2! I am excited to see how it goes, and like godfather says, if it's feasible, and to my own addition, keep gauges, A/C, and VSA, then I'd deffinately be interested in this myself!

 

This has been known for a while...it's the mystery harness that no one knows about. I've even heard rumors about how expensive the harness is, etc.

Anyway, I hope you figure it out. No one else is as motivated as you are in getting this done lol

 

Yea.. i noticed this..haha I'll be picking up the K20 head this weekend or maybe even tomorrow if the guy gets back to me by then. Im going to be honing the block as well... and getting a three-angle valve job while im at it. I'll be doing Rods/Pistons/Sleeves/Valve springs/Retainers/injectors/fuel pump.. alot of work. Its gonna take for this since i havent started anything yet. Im waiting to see about this harness but need to get this k20 head now because i might not run into another one since im here on the east coast and nobody from the west wants to ship!

 

from black market regarding hytech setup

 

Ok.. thats an awesome find! Im fine with losing traction control.. I emailed Hytech about their harness so i'll wait to find out what they have to say about it. If i'll still have AC and my guages i'll be fine... I never use VSA

 

Interesting... keep us posted.
I am considering the Hytech cams and reflash myself, but I would love to have a K-pro instead of a reflash.

 

why are you swapping heads?
the k24a2 head is the same as the k20a2 head or thatīs what I thought. only difference beeing cams and 25° vtc instead of 50° for the k20a2?

 

I can/t remember the name off the top of my head, but I know there is someone on honda-tech that makes the harness too.. for a lot cheaper than hytech. He was doing this even before hytech released theirs. I will try to remember his name if i can

 

well from what a couple CRSX people are sayin... the k20a head flows better and the intake cam gear rotates to 50 degrees, the tsx intake cam would have to be modified. The k20a head is a lot better than the tsx head..

 

So where is VTC located on our cars? That wouldnt be on the head would it?

 

IMO, you might be better off getting the '06+ TSX head since that intake cam is better than the ITR cam. Also, you could just machine the TSX VTC to get up to 45 degrees.

 

It's in the head connected the intake cam

 

So the RSX-S head should already have the VTC in it?

 

The i-VTECs have the VTC. You have a VTC right now.

 

I know i have VTC.. but is VTC conected to the cam gears? Meaning.. if i get this RSX-S head, it should have VTC connected to its cam gears so i dont have to modify my TSX's VTC..right?

 

Some of the RSX guys are actually trying to sway to the 06+ TSX cams. Hondata has said that they are one of the most aggressive factory cams that Honda has made to date.

 

The VTC mechanism is INSIDE the intake cam gear.

 

VTC is the cam gear on the intake cam.. replaces a traditional fixed cam gear, with one that moves.. henceforth, advancing intake cam. correct me if i'm wrong, but all i-vtec motors have a vtc gear? this is why a traditional vtec controller doesn't work well.. it cannot adjust the VTC gear. also note that due to our increased stoke, hondata says not to advance it past 45 degrees.. not unless you clay the motor to check for clearance.. which you should do if your building your motor anyways

 

^^ Yes, the "i" in i-VTEC indicates VTC.

 

It's not the stroke. Just the pistons don't have deep enough valve relief.

 

I do believe that one is not better then the other.
and as the guys stated, best way would probably be to modify your exsisting vtc to go to 45°. if you use the whole 50° of the k20a2 head you could run into piston to valve clearance issues.
and yes also the tsx has the most agressive intake cam of the bunch so I do believe your actually not gaining anything by swapping to the k20a2 head, only alot of work and expence that could be avoided.

 

Its not that easy to make a "jumper" harness like that...And everything doesn't work properly when one is used.Here is what it looks like..It can and has been done, that doesnt mean it WILL be done for the TSX...I heard Hondata won't realease it for th TSX.


A bett solution would be to use the AEM Fi/C setup to tune the car, From what I remeber the issue with the hondata re-flash was the 5psi limit due to the lack of injector pulse width control.?.? That item appears to be a good solution for the TSX.

As for the cams the tsx intake with an 02 rsx exhaust cam would be anice setup for F/I..

 

TSX536 comment please I see YOU :p Your OG here

 

i'm so lost in all of this but i want SOMETHING if hondata is not gonna reflash the 07/08's

 

There was someone who even tested the heads stock for stock and the k20a2 head had a better flow.. especially up top. Here is the write up

Head Flow

 

PrecyseStylez, wasn't sure if you had ever seen this but HKS makes stuff that works for the TSX but its outrageously prices.

http://www.jtuned.com/content/templa...d=296&zoneid=1

 

Yea.. thats an old article.. i've seen that about a year ago.

 

A stock 06-07 TSX head might yield better results than the 04-05.

 

the chart there shows that the tsx head has signifficantly better flow up to 5500rpm then it runs out of breath, but I donīt think that matters too much cause you donīt rev the tsx motor that much(8000rpm beeing about the max), so when deciding on this you have to be very specific on what the motor is going to be used for and in what car itīs gonna be.