K24A3 vs. K20A cams

[mocchi]

i wouldnt use a 50deg VTC if you paid me to - i wouldnt trust the ECU to hold it back from the 45+ line
TODA 40deg or a machined stock unit would be alot safer

the cam spec on the 2006+ intake cam is one of the best setup cams that honda has ever produced
im very keen to build around it and see what kind of results i get
http://www.hondatuningmagazine.com/t...ower_struggle/

i just have to make sure i get the right one

i also wouldnt use a CAI on this car/engine
i really like the results from the comptech icebox as seen here and felt on my car from switching between different intakes:
http://www.heeltoeauto.com/tech-arti...acura-tsx.html

dont use it if you dont wanna use it but dont say it as if youve known it to be true.

50 vtc is fine for k24a3 with 06 tsx intake cam.

inb4ban

ohwait

[TheSaint]

have any of the people that are saying that the 50deg VTC is ok to use on this setup actually clayed an engine or tested it at high rpm?
on the USDM version of this engine there is a higher risk of valve to piston contact AT 50deg VTC with the 2006+ intake cam

rather than cheaping out and slapping in an RSX OEM 50deg VTC and relying on EMS to keep the degrees back
(bare in mind the tolerance is +/- 3 degrees for VTC systems and the 2003-2005 k24a3 has slightly shallower piston valve reliefs)
wouldnt it be prudant to just buy/make a 40 or 45 deg VTC mechanism so you KNOW it will never be a problem?

seems that if you are going to go to the effort at least do it properly eh?

http://hondata.com/tuning_k24a2_tsx_engine.html

Hondata on using the OEM 50deg VTC:
"Although you could probably purchase and bolt on an RSX VTC mechanism for 50 degrees travel, there is less valve to piston clearance on the TSX pistons. Our measurements suggest 45 degrees maximum cam movement is much safer. Allowing the full 50 degrees movement leads to a greater risk of valve to piston contact should you accidentally mis-shift and over-rev."

http://hondata.com/help/flashpro/ind...ng_for_vtc.htm

Hondata on tuning VTC with EMS:
"Warning
With Honda cams there is a physical stop limiting cam advance to prevent valve to valve contact and valve to piston contact. With after market cams it is up to the manufacturer to ensure that the cam lobes are positioned so that valve to valve and valve to piston contact is not possible. Because the cam control mechanism uses a closed-loop feedback system, limiting the cam position in the ECU will not guarantee that the cam position will not exceed what is set in the ECU. Because of this all cams must have a physical stop to prevent valve contact."


Results of VTC slippage (cammed motor but still good read):
http://www.k20a.org/forum/showthread.php?t=7661

[mocchi]

I got k24a3 with new tsx 06 intake cam and 50 vtc. I rev it to 8k.
Bought in cam new from auto fair.

Do you have it in your jdm deefuf.. I mean cl9?
You insist on what you think is correct? Byp guys have a lot more experience and they've done it.
You should take their advice just like you take advice from hondata

Don't be so easily biased I guess.

[EKVTIR-T]

I think he's just being cautious

its a leap of faith to trust internet people and risk blowing up your pride and joy

so I kinda see his perspective,but as above guys have tried and tested it already

[mocchi]

I think he's just being cautious

its a leap of faith to trust internet people and risk blowing up your pride and joy

so I kinda see his perspective,but as above guys have tried and tested it already

yeah its been done and its fine.
his comments were misleading saying "i wouldnt use a 50deg VTC if you paid me to - i wouldnt trust the ECU to hold it back from the 45+ line"
saying that no one should ever use 50 vtc with 06 intake cam.

[EG5]

Ive been using 50 degree VTC on my k24a3 since 2006
8500 rpm rev limit. Engine done 200 passes down the 1/4 mile and say 30 track days.
No problem so far.

[TheSaint]

well nobody has shown any proof otherwise
at least hondata links have proven results and are a reputable company
havnt heard of any of these guys before - so what makes them different?
they only suggested otherwise - no proof

[TheSaint]

Ive been using 50 degree VTC on my k24a3 since 2006
8500 rpm rev limit. Engine done 200 passes down the 1/4 mile and say 30 track days.
No problem so far.

theres a voice i know and trust
is that with stock cams at all?
and which version of the intake cam did it have stock?

[mocchi]

well nobody has shown any proof otherwise
at least hondata links have proven results and are a reputable company
havnt heard of any of you guys before - so what makes them different?
they only suggested otherwise - no proof

what you mean no proof, lotta guys from US done that.
yes there were some that physically limit vtc movement to 45. hytech does this mod too.

lotta guys here in au done that too but you cant seem to believe otherwise.

[TbM]

i also wouldnt use a CAI on this car/engine
i really like the results from the comptech icebox as seen here and felt on my car from switching between different intakes:
http://www.heeltoeauto.com/tech-arti...acura-tsx.html

ummm in that link the k & n cai seems to be equal to or make more power/talk than the icebox everywhere but 2300-3k rpm range so dont know what your point is unless im reading the graph wrong.

Graph showing our top three finishers. K&N is the red dashed line, CT is the green, and the Injen is the solid red.

[TheSaint]

the k+n makes a very slight over all improvement over the icebox
but the icebox retains alot more torque and has a much nicer sound
(look at the icebox torque spike)

read the article - iv tested both on CL9 and its pretty much what they say

[Vvvtec]

Im running karcepts cai on my k24. Seems to like it. Lol.

Also running 50vtc.