I have a GSR head with ITR valves, skunk2 dual valve springs, skunk2 titanium retainers and I am going to run peak performance cams..

I have been hearing some bad things about how ITR valves are lighter, but actually weaker. I cant really find any info about this one here by searching, and was seeing if anyone had any insight. Would it be worth it for me to throw in some GSR valves or would it be reliable to keep the ITRs?


I realize that ITR and GSR exhaust valves are the same part number, just wondering about the intakes valves..


Modified by RMXmitch at 6:42 PM 11/27/2007

 

Based on that set-up, if you have a problem don't expect any sort of warranty.

You should at least run all of the same manufacturers valvetrain.

 

so the question is about the valves... is it worth changing out the intake valves for stock gsr's

 

What about that response did you not understand.

If you want some sort or warranty then you need to use the entire omni valvetrain ie valve spring, retainers, and valves.

 

I am not asking about any warranty...

I am simply asking if ITR intake valves are any less reliable than GSR intake valves with this set-up..


I realize that forged valves are probably the best "warranty" but for a NA applications I have not found too much info supporting that OEM valves are less reliable than aftermarket...

 

You are OK with ITR valves, unless they have lots of miles and abuse, then any new valve is better. The GSR, ITR valves get the same warranty new from Acura. Think about it.

 

pretty sure warranties mean jackshit in this case so stfu about them

and no the itr valves are fine, the exhaust is the same as gsr but the intake are actually stronger and lighter

 

so your saying itr are stronger and lighter?


I think I am justing going to run this set up, and set the rev-limiter at about 8500.. Just hoping the heavy valve springs dont break the valves

 

i asked this a few weeks ago and got stupid replies as well

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RMXmitch &raquo;</TD></TR><TR><TD CLASS="quote">so your saying itr are stronger and lighter?


I think I am justing going to run this set up, and set the rev-limiter at about 8500.. Just hoping the heavy valve springs dont break the valves</TD></TR></TABLE>

yes they are, and stiff valvesprings have nothing to do with breaking valves, make sure that the valve lashing is in spec and if you are going to run to 8500 i suggest you make sure you are actually making power that high and use arp rod bolts

 

lmao @ itr valves being weaker.
so i guess all the ITR guys who track their cars always have to bring their cars in for valve problems under warranty? because their valves are prone to breaking?

i don't think so.


just get a valvejob from portflow and have top look at your valves. actually he does already with the valvejob. one of my valves were slightly bent so he replaced it.

there are plenty of ITR's with over 100k miles and the same valves as the day they came off the dealership parking lot.

geez u guys

 

thanks for the good replies.

 

I :heart: ITR intake valves. Never had an engine failure that I could blame on them. Retainers on the other hand

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ipodhustle &raquo;</TD></TR><TR><TD CLASS="quote">lmao @ itr valves being weaker.
so i guess all the ITR guys who track their cars always have to bring their cars in for valve problems under warranty? because their valves are prone to breaking?

i don't think so.

just get a valvejob from portflow and have top look at your valves. actually he does already with the valvejob. one of my valves were slightly bent so he replaced it.

there are plenty of ITR's with over 100k miles and the same valves as the day they came off the dealership parking lot.

geez u guys </TD></TR></TABLE>


no, the point is we were questioning their strength with aftermarket springs and the thin stem.
why does everyone keep bringing up factory warranty's considering what this web site is about.

 

This thread .....


Anyway, I originally told the OP to match the valve train to camshaft.

Then he asks what about ITR valves.

DonF told yeah it would be 'OK'.

Let me ask this, "was the ITR valve designed to handle the 25 to 30% increase in spring pressure?" The simple answer is no.

So when you put this together you know it's living on borrowed time.

I seen several examples of dropped valves where people have been screwed by the manufacturer because they mixed different vendors for the valvetrain. At least if you get the parts from the same manufacturer they will cover the expense of a new valvetrain.

 

first question had to do with strength of itr intake valves vs strength of gsr intake valves..


i think everyone agrees with you that forged valves are stronger..