Greddy Type RS BOV One Spring Mod
Wrong.
Originally Posted by TTP Engineering
Yup backwards...
Furthermore taking out a spring on a GReddy is a ricer mod that will screw up your idle and AFR as it leaks wide open at idle with only one spring.
Furthermore taking out a spring on a GReddy is a ricer mod that will screw up your idle and AFR as it leaks wide open at idle with only one spring.
Wrong
Wrong
Wrong
Wrong
Originally Posted by TTP Engineering
OK, buddy. Take yourself and your expert credentials elsewhere.
You have no idea that you have no idea. It is not your fault.
You have no idea that you have no idea. It is not your fault.
Really Mr. TP?
Originally Posted by TTP Engineering
The crack smoking fireman.
Read this post slowly and you may see how wrong you are. Then read it again. Then ask a few people who have done the single spring mod.
https://www.evolutionm.net/forums/sh...ad.php?t=24611
Originally Posted by cfdfireman1
Read this post slowly and you may see how wrong you are. Then read it again. Then ask a few people who have done the single spring mod.
https://www.evolutionm.net/forums/sh...ad.php?t=24611
https://www.evolutionm.net/forums/sh...ad.php?t=24611
The knowledge of the forum EVOLVES just as the car has over the years. I was one of the morons that thought it was a good idea, until after listening to the valve cocked open during cruise (whistleing) for long enough decided to investigate it further. Venting to atmosphere with our MAFTPro speed density conversion I was able to stick my whole finger inside of the open piston of the BOV while IDLEING. I then realized why the idle was so poor as the metered air would just continue to leak with the piston open.
It is a ricer mod designed to reduce surging, but weakening the holding capacity of the BOV and screwing up the idle. It has since been determined to be a poor modification with ill results.
If you continue to dig up 39 month old threads for advice, you will find out the hard way what a poor setup you have put together with outdated advice.
Why do you think the Evo has a 10.5 hotside in 2005?
Why does the 2006 have a metal bov?
Why does the 2005+ not have the p0300 misfire code issue?
If they build Evo's using 2003 information, we would have no progress.
Last edited by TTP Engineering; Aug 2, 2006 at 06:16 PM.
Originally Posted by azredevo
True, I'm with you on that one, however they now have an ASE Certified mechanic on staff, for reasons like this. The Installs I had done before happened when the regular mechanic was out. Someone else with the shop did it
03 Evo Viii
“"Venting to atmosphere with our MAFTPro speed density conversion I was able to stick my whole finger inside of the open piston of the BOV while IDLEING.”"
And this has what to do with azredevo's setup????
And this has what to do with azredevo's setup????
Leak?
Originally Posted by hondafan
that is all well and good but from experience most ASE cert mechanics know dick about performance modifications. and to the fire man, i did the single spring mod for a while and it leaked at idle, under boost and everywhere in between even when tightened very tight, so i put both springs back in and never looked back. i've done boost leak tests to 25 psi with absolutely 0 leak from the BOV and the car just runs overall better.
Where exactly did it leak to? Did you apply boost pressure to the reference side when you did the test?
Originally Posted by cfdfireman1
“"Venting to atmosphere with our MAFTPro speed density conversion I was able to stick my whole finger inside of the open piston of the BOV while IDLEING.”"
And this has what to do with azredevo's setup????
And this has what to do with azredevo's setup????
Originally Posted by hondafan
that is all well and good but from experience most ASE cert mechanics know dick about performance modifications. and to the fire man, i did the single spring mod for a while and it leaked at idle, under boost and everywhere in between even when tightened very tight, so i put both springs back in and never looked back. i've done boost leak tests to 25 psi with absolutely 0 leak from the BOV and the car just runs overall better.
People wonder why their Evo's are plagued with problems. With hardheaded people like this, its no wonder.
Originally Posted by TTP Engineering
Welcome to the future, it is 2006 not 2003 (39 months later than the thread).
The knowledge of the forum EVOLVES just as the car has over the years. I was one of the morons that thought it was a good idea, until after listening to the valve cocked open during cruise (whistleing) for long enough decided to investigate it further. Venting to atmosphere with our MAFTPro speed density conversion I was able to stick my whole finger inside of the open piston of the BOV while IDLEING. I then realized why the idle was so poor as the metered air would just continue to leak with the piston open.
It is a ricer mod designed to reduce surging, but weakening the holding capacity of the BOV and screwing up the idle. It has since been determined to be a poor modification with ill results.
If you continue to dig up 39 month old threads for advice, you will find out the hard way what a poor setup you have put together with outdated advice.
Why do you think the Evo has a 10.5 hotside in 2005?
Why does the 2006 have a metal bov?
Why does the 2005+ not have the p0300 misfire code issue?
If they build Evo's using 2003 information, we would have no progress.
The knowledge of the forum EVOLVES just as the car has over the years. I was one of the morons that thought it was a good idea, until after listening to the valve cocked open during cruise (whistleing) for long enough decided to investigate it further. Venting to atmosphere with our MAFTPro speed density conversion I was able to stick my whole finger inside of the open piston of the BOV while IDLEING. I then realized why the idle was so poor as the metered air would just continue to leak with the piston open.
It is a ricer mod designed to reduce surging, but weakening the holding capacity of the BOV and screwing up the idle. It has since been determined to be a poor modification with ill results.
If you continue to dig up 39 month old threads for advice, you will find out the hard way what a poor setup you have put together with outdated advice.
Why do you think the Evo has a 10.5 hotside in 2005?
Why does the 2006 have a metal bov?
Why does the 2005+ not have the p0300 misfire code issue?
If they build Evo's using 2003 information, we would have no progress.
OMG, this is like DejaVu all over again. I went through the same headaches TTP is describing here. Was driving for a week with the whistle sound trying to find out where the hell it was coming from. I was seeing the same ****ty idle symptoms with the BOV open at idle. The car was stumbling soo much that i came to an emergency stop and the car completely shut off on me. Not a fun site when someone is coming at you at 60mph+ and your car is shut off at an intersection.
