While i dont normally take what i read on the internet as gospel i do take what you saw with very high regard. But i am also confused on how your idle would be altered by bypassing the coolant on the TB. I can only assume you mean that the throttle plate can stick open if moisture builds up and freezes. I know a lot of people in MA that have done this without issue.

 

The Idle Stepper Control (ISC motor) is affected by looping the coolant lines. The idle typically becomes more erratic, especially at startup. The coolant circulation helps bring the TB up to temperature. I am sure one of its functions is also to thaw out the throttle plate.

 

I agree with what you are saying, but theoretically if you live in say Vegas could you do this mod with no ill effects? also can there be any gains by doing this? less heat around the fuel/air coming into the motor?

 

Have you ever wondered why TTP-Engineering is #2 on Jestr's myspace page? We do not have personal issues with one another other than our supporters stirring up controversy with comments such as yours. There is a mutual level of respect between us, even as local competing entities that used to work as one.

You have a right to support your tuner without question. You owe it to Jestr however to refrain from a negative posting campaign regarding tuning and tuners. I am certain that is not the image he is after.

If you want to help your tuner, you should try and align yourself with him by asking yourself before posting "How would Jestr feel about my comment?" prior to hitting "submit". I think if you would follow that guideline you would be serving John in a more positive way that he could appreciate.

This post is a little OT, however we have seen a history in your posts like the one above. Knowing John for well over a decade, I don't think he would support the direction of your negative campaign.

Thanks for taking the time to read this.
TTP

 

lol. so little you know my friend.

second you took it the wrong way. i did not say ur tuning sucks. i simply said maybe its your tune. or maybe i dont have issues with mine because it was tuned out when he tweeks my maps. did i say you suck? no. did i say you dont know how to tune? no. dont take it to hart next time.

 

OK back to the topic on hand. The positive side, you cool your fuel down. Cool(er) fuel is so important, an F1 team got busted in the last race for have a fuel temp lower than what it should of been post-race (illegal hidden fuel-cooler). You'll also regularly see reflective blankets on Superbike tanks on the grid.
The negative side is you might have an erratic idle, which may or may not be able to adjusted out. Unless this translates into a bad on/off throttle hesitation at speed, I'd say it's definitely worth bypassing it, and testing it on a dyno.
I'm gonna go ask Mike at RRE.

 

inside the throttle body is a small temp reading thingy i forget how it was explained to me and that reads the temp of the coolant running through it. while the car is warming up it alows the idle to be higher to warm it up faster and once the coolant warms up it lowers the idle via the throttle body. even though it is also controled through our ECU it has this primitive system as well. i had a small issue with it when i bypassed mine and i live in socal. i kinda fixed it though

 

i been running with out the coolant lines going towards the Tb since 2004. never have idle issues.

 

I have no idle issues as well my idle is exactly the same as before bypassing the lines. The only downside I could see is is the throttle plate froze up but like I said im in NJ and never had a problem.

Many RSX-S guys do this mod with no ill effects

 

While your theory does make sense i dont think the stepper motor is affected by the weather unless you are in very extreme temps. The coolant takes a while to get up to temp and I have never had erratic cold idle which is where i would assume it would be seen. then again i am not a mechanical engineer. Either way i dont have plans on removing it anyway.

 

Well I am going to try it, I am going to just put a ball valve on the pressure in line so I can open it if it gets too could outside.

it seems crazy to send all that air through a big arz intercooler only to have it pushed into a 200 deg TB.

What about the intake manifold? Does it need cooling from H2O? Or could you bypass it as well?

 

I have had mine bypassed for ~2 years now w/o any issues and dealing w/ the cold Chicago winters. You'll be fine if you bypass it

 

Bypassing the Coolant in the TB has been done for years on many cars; However, personal experiece on my Car, and other friends Cars, doing this, the car acts up and it is my opinion that it efects performance. We have re-routed the lines back to OEM fashion because of it.
I am going back about two years, when my set-up was mild.

 

i have done this about 15 times all done on mkiv supras, and there has never been a issue. i have yet to do it to my car, but i will in the near future. i also live in Mississippi so not much cold weather to worry about down here.

 

dont mind that TTP guy, his philosophy is not engineering knowledge but from 100% experience. his always comment is, I did this....for many years on hundreds of cars..
he said the same thing about a PCV discussion and countless others.
look at my quote I got from him, LOL