Coolant Bypass of Throttle body

[noob2protege5]

http://cgi.ebay.com/ebaymotors/95-03-Mazda-Protege-Throttle-Body-Bypass-Kit-8hp_W0QQcmdZViewItemQQcategoryZ38634QQitemZ2200975 97851QQrdZ1QQsspagenameZWDVW

The premise is, hot coolant flows through the throttle body increasing the temperature of the air going into the engine. So, just stop the coolant from going into the throttle body.

Has anyone done this? if so, any diff? and general what do you think?

Let the talks begin(whitep5)

[Luni]

If you live in an area where it freezes during the winter, you need this, or your engine will run worse when its cold, that TB bypass helps heat the air up.

You want the air cool, but you dont want it too cold. For an NA car, I doubt youd feel any gain from removing it, other than cleaning out 2 rubber lines from the engine bay.

I doubt its even worth your time.

[5PADZAM]

http://cgi.ebay.com/ebaymotors/95-03-Mazda-Protege-Throttle-Body-Bypass-Kit-8hp_W0QQcmdZViewItemQQcategoryZ38634QQitemZ2200975 97851QQrdZ1QQsspagenameZWDVW

The premise is, hot coolant flows through the throttle body increasing the temperature of the air going into the engine. So, just stop the coolant from going into the throttle body.

Has anyone done this? if so, any diff? and general what do you think?

Let the talks begin(whitep5)

Yeah, actually it is a common mod. Search on that and you will find all you want to know about it.

[Kansei]

If you live in an area where it freezes during the winter, you need this, or your engine will run worse when its cold, that TB bypass helps heat the air up.

You want the air cool, but you dont want it too cold. For an NA car, I doubt youd feel any gain from removing it, other than cleaning out 2 rubber lines from the engine bay.

I doubt its even worth your time.
I've driven my car just fine in -20F temps quite a few times with the throttle body coolant passage bypassed, even before I was turboed. It isn't to heat the incoming air from what I've seen, it's just to prevent the throttle plate from possibly icing up and sticking.

Either way, you don't need to buy any kit to do the job. You just pull off a couple hoses, put a couple caps on a couple now open coolant fittings, and clamp down the caps. $3 in parts at an auto parts store.

[noob2protege5]

Either way, you don't need to buy any kit to do the job. You just pull off a couple hoses, put a couple caps on a couple now open coolant fittings, and clamp down the caps. $3 in parts at an auto parts store.

yeah, I was never planning on buying the mod. The ebay post made the mistake of picturing everything you need. ACE Hardware, here we come.(drive)

[funktownp5]

All you need is a 3/8 barbed splicer from Home Depot.

[Luni]

I've driven my car just fine in -20F temps quite a few times with the throttle body coolant passage bypassed, even before I was turboed. It isn't to heat the incoming air from what I've seen, it's just to prevent the throttle plate from possibly icing up and sticking.

Either way, you don't need to buy any kit to do the job. You just pull off a couple hoses, put a couple caps on a couple now open coolant fittings, and clamp down the caps. $3 in parts at an auto parts store.


Ok, but the point is, it is a fairly pointless thing to do.

I just dont see why someone would want to go through the trouble of doing this. It gains you virtually nothing but those lines gone, which arent in the way really anyway.

[aMaff]

You call that pointless? Check out the pic on the ad!
http://www.gofastperformance.com/ebay/speed.jpg
You can CLEARLY go 167MPH w/ this mod!


:p


Welcome to the forums!

[Kansei]

Ok, but the point is, it is a fairly pointless thing to do.

I just dont see why someone would want to go through the trouble of doing this. It gains you virtually nothing but those lines gone, which arent in the way really anyway.

Well some of us did it to free up those coolant fittings for other things (shady)

mmmmm snail (yes)

[Maxx Mazda]

Ya, I did it WAY back... No probs.

[Crazee D]

A mod easy enough for me not to screw up! Did it around the holidays, I already had cold start issues. I just let it warm up for a couple mins and shes good to go!

Free Mods FTW!

[mazdaspeed777]

I just did it in my P5. But I did it when I installed OBX headers P&P intake manifold w/VTCS removal and thermal spacer all at the same time so I probably wouldn't be able to tell.

[Luni]

Only valid excuse Ive seen so far for this mod is to snatch the lines for a turbo.

[Crazee D]

It prolly does diddly, but I like to tinker

[5PADZAM]

In theory, the throttle body would be cooler. The air going in would cool it down, so any heat picked up from the heatsink effect of being bolted to the engine would be reduced. This should cause the air going into the intake manifold to be a little cooler than if the throttle body had hot engine coolant circulating through it. And we all know that cooler air is more dense, and will make more power. Hence the reason for a cold air intake. But how much of a difference does it actually make? We'll never really know unless someone checks it on a dyno. I probably won't go to the trouble unless I decide to go turbo and I need the coolant line for that.

[Kansei]

I guarantee the fluctuation from one dyno session to the next will swallow any gains that this mod may or may not make.

[AusOrion]

Someone has had some success with using a ram air scoop and piping to feed into the outer shell of the throttle body on a 94-98 Mazda. The idea is that the air flow is able to take some of the heat out of the throttlebody. It wouldnt help much when you are sitting in traffic though.

[rednecks_r_us]

I did this little mod in Dec of 05 when i swapped motors and haven't noticed anything good or bad.

[Mr.Ames]

i thought u only had to do this if u put in a throttle body spacer?

[mazdaspeed777]

i thought u only had to do this if u put in a throttle body spacer?

Do they make throttle body spacers? Is that supposed to help cool the TB and IM just like the IM thermal spacer? If so where can I get one??

[aMaff]

They make IM and TB spacers.

[Mr.Ames]

I got an IM spacer from nsnmotorsports.com but i dont think they have the TB spacers anymore

[mazdaspeed777]

So anyone no where they sell TB thermal spacers still??

[i12drivemyMP5]

Do a search on it. Saw a thread recently where someone was battling throttle cable & gasket leak after doing TB spacer. IIRC they spoke of where they got it from too.

[aMaff]

I thought NSN was still making them, but I'm not sure

[Mr.Ames]

I bet steve would make some more if he had enough people asking for them

[mazdaspeed777]

Do a search on it. Saw a thread recently where someone was battling throttle cable & gasket leak after doing TB spacer. IIRC they spoke of where they got it from too.

Hmm... yah I wonder if that would stretch the throttle cable. I bet it would, but there are way's to adjust it I believe

I havent seen a TB spacer on NSN, that is where I got my IM thermal spacer.

[aMaff]

yes, you have to adjust the throttle cable.

I don't see the TB spacer either. I know they used to make them at one point. If you're interested, shoot NSNMotorpsorts (I think is their name) a PM and see if they've still got a couple laying around

[Luni]

I still think everyones money and time and effort would be better spent elsewhere.

As said above, you might see 2 or so HP from this, but that could be fluctuations from one session to another.

I still maintain in my opinion, having dealt with all sorts of cars, (Mitsubishis, toyotas, mazdas, nissans), it isnt worth it. Ive never seen a car where it showed solid proof that a TB spacer and coolant bypass mod did ANYTHING concrete for.

Not trying to rain on anyones parade, but I feel that strongly about it. Look at the people that have posted about it having done it. They dont even notice its there. It could go one way or the other. Their "butt dyno" doesnt feel a difference. That means the placebo effect isnt even strong enough to convince me its worth it.

[Maxx Mazda]

I jsut did it cause I had my IM off and didn't wanna hook up the hoses...

[Luni]

So it seems the general concensus is that they did it to "be lazy" so to speak.

Nobody is touting any performance gains from it.

[Not Jo3L]

Bump i need info on the parts for this mod.

So far i know you need a plumbing connector for the two hoses.

Can anybody tell me what else i need please?

[Alejo_NIN]

you don't need parts for this mod!!!

if you pay attention to this instructions is a free mod!!!


First, remove thorttlebody to intercooler pipe.
with car cold, remove the top coolant line on top of the thorttlebody, it'll be the only black hose going into the thortle body on the top
then remove that same line from the coolant block next to the head where the temp sensor goes.

then remove the bottom coolant line from the thorttle body
now use this same line and connect to where you removed the other line on the coolant block where the temperature sensor is.

trust me, it is long enough. now use the other hose and connect it to the top of the throttlebody and then loop it into the bottom one, this way, you can always go back if needed, no need to look for hoses at discount autoparts.

Total time: 20 mins
Total money wasted: $0
Total Coolness Effect: 3 out of 5
Total HP gained: .5Hp and .3 Tq
Weight Reduction: None
Top speed, raised to 200MPH


have fun

[aMaff]

Total time: 20 mins
Total money wasted: $0
Total Coolness Effect: 3 out of 5
Total HP gained: .5Hp and .3 Tq
Weight Reduction: None
Top speed, raised to 200MPH

Man, those are some bold claims! ;)

[Not Jo3L]

My car is a 99 protege es

no intercooler here but it would be nice to have one

[Alejo_NIN]

Man, those are some bold claims! ;)

hope you got the sarcasm in that....

[aMaff]

hope you got the sarcasm in that....

I hope you got the sarcasm in that too (dark)


(outie)

[Alejo_NIN]

i hope you got the sarcasm in that sarcasm pointing sarcasm thread

[aMaff]

i hope you got the sarcasm in that sarcasm pointing sarcasm thread

Yeah, well I hope you don't forget to plan for the pre sarcasm planning sarcasm meeting, for the pre meeting that discusses the agenda for the sarcastic sarcasm conference meeting planning meeting.


(smash)