VTC angle

[Quest]

Can someone confirm what the current angle of the VTC is. Is it currently stock @ max 25 degrees....meaning, any engine management software can't advance this further without you having to machine this part...

I did a search for 'VTC' in this forum, and did not find a single thread?

[EG5]

yes 25 degrees on stock k24a3 euro motor

[Quest]

yes 25 degrees on stock k24a3 euro motor

Thanks for the prompt response EG5...my next question :

Has anyone successfully machined this in their writeup to 45 degrees or less?...looking for a decent writeup with pics to see what's involved..searched the net and could only find seperate pics and seperate discussions in different forums...even heard of one guy of using his dremel to machine this DIY....I have a Dremel, but in no way confident enough to tackle this DIY...

If someone has some personal experience with some good pointers

Thanks

[Chris_F]

I was looking to buy a 45 degree VTC that had already been machined by someone else... but they are very hard to come buy.

You could always buy an accord euro VTC gear from Honda and then find a machinist who knows what they're doing..

The other option is to run the 50 degree VTC from the k20... but you would probably have to check clearances on your engine

[EG5]

We are using 50 degree VTC on k24a3 without any problem
Im using hondata kpro ecu

[Quest]

We are using 50 degree VTC on k24a3 without any problem

With no valve to piston contact?....

From Hondata website
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

[CRXer]

thats just the risk u take with cheaper 50 deg vtc option

for most people doing this,like EG5 above,the repair expense is smaller & the reward outweighs the risk for the dollars spent.

if ur on tight budget,& have limited access to sourcing & rebuilding motors & parts,then maybe the extra expense up front of just machining the 25deg vtc to suit,will work out cheaper & give u more peace of mind in the long run.

[integral90]

Can someone confirm what the current angle of the VTC is. Is it currently stock @ max 25 degrees....meaning, any engine management software can't advance this further without you having to machine this part...

I did a search for 'VTC' in this forum, and did not find a single thread?

A good way to overcome this is to get very aggressive cams. I know the Toda Spec C cams have a max safe VTC of 20 degrees or something. That would save you the headache of getting the 25VTC machined

[EUR003act]

With no valve to piston contact?....

From Hondata website
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

he's using it in a full race/track car...

if he blows an engine, he just swaps a new one in....

on your daily driver... risk it if you want

[EG5]

With no valve to piston contact?....

From Hondata website
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

We dont max it up to 50 degrees on kpro.
If im not mistaken we only run 39-41 degrees max.

Yes the risk is there if you miss shift or over rev.

[Aslam]

Just a small revival of this thread, I seriously would like to try this.....
Will I get major gains getting the VTC machined to 45 degrees and tuning with Emanage
while only running exhaust, decat , CAI (SRI) and DC Sports header ?????

[aaronng]

Just a small revival of this thread, I seriously would like to try this.....
Will I get major gains getting the VTC machined to 45 degrees and tuning with Emanage
while only running exhaust, decat , CAI (SRI) and DC Sports header ?????

Emanage alone can't control VTC. You need a Vmanage with the Emanage.