Throttlebody Coolant Bypass

silverstream · Post by **silverstream** » Fri Mar 21, 2003 5:17 am

Had anyone did a Throttle Body Coolant Bypass ?

What are the immediate benefits and pitfalls ?

Does anyone have any pictorial guide on which is the inlet and outlet from the throttlebody ?

Thanks

pills_PMD · Post by **pills_PMD** » Fri Mar 21, 2003 6:22 am

you dont' really need a diagram... just pull them both off and connect them together.

you will lower your air intake temps, but may lose fast idle depending on if you have the wax type assembly.

silverstream · Post by **silverstream** » Fri Mar 21, 2003 5:02 pm

Thanks .... I'm running the K20A, and I've no idea if it is using the wax type assembly.

Anyone has any idea?

silverstream · Post by **silverstream** » Thu Mar 27, 2003 6:29 am

Hi to all ...

I've recently been toying the idea of a throttle body coolant bypass mod.

However, my mechanic recommend against it, as he mentioned that the throttlebody coolant act as a choke. During warm up, it heats the engine to reach operating temperature (by using a set of mini gear).

Without it, it will take at least 3 times to 5 times longer to warm up and as a result, I will get unburnt fuel and black smoke from the exhaust.

The temperature around my area is consistent 80F-90F ..

Comments ?

pills_PMD · Post by **pills_PMD** » Thu Mar 27, 2003 8:02 am

i put it back on in the winter and take it off during the summer . no problems for me, but i have a b16

silverstream · Post by **silverstream** » Thu Mar 27, 2003 8:22 am

Any side-effects during summer ?

C_Tech97GSR · Post by **C_Tech97GSR** » Thu Mar 27, 2003 10:57 am

There shouldn't be any side effects other than what was already mentioned. I would reccomend putting it back in the winter for the reasons that your mechanic gave.

rsbad454 · Post by **rsbad454** » Fri Apr 25, 2003 7:25 am

coolant bypass wont do crap..........and there isnt any gears or what so ever in the throttle plate........

its basically a placebo affect. granted you may gain a tiny bit or throttle response but thatas about it, and also it doesnt make the car warm up any slower..........been there done that and know others who have as well and no performance gained HP is only gained mechanically through cams, compression and how the intake and valves are setup.........the more air you move the more power you produce.

martini · Post by **martini** » Tue Apr 29, 2003 11:05 am

rsbad454 wrote:HP is only gained mechanically through cams, compression and how the intake and valves are setup.........the more air you move the more power you produce.

you are naive if you think a lower intake temp won't give hp. cooler air = denser air. Denser Air = More Power. The difference may not be much, but it does make a difference.

I'm not saying if it will make you warm up slower..but IF it causes you to lose your fast idle, then yes, you will warm up slower. But nothing lost, you shouldn't really be using your idle to warm up anyways.

Anyways, I just looped the hoses back on each other, removed the coolant assembly off the TB, and replaced it with a block-off plate (nothing fancy, just some thin aluminum). Then I put caps on the other two nipples. No biggy. I was more interested in simplifying the system than I was the cooler intake temps. Plus we had a bit of a leak that we couldn't pinpoint. So this eliminated that.

rsbad454 · Post by **rsbad454** » Tue Apr 29, 2003 12:57 pm

martini wrote:
rsbad454 wrote:HP is only gained mechanically through cams, compression and how the intake and valves are setup.........the more air you move the more power you produce.
you are naive if you think a lower intake temp won't give hp. cooler air = denser air. Denser Air = More Power. The difference may not be much, but it does make a difference.

I'm not saying if it will make you warm up slower..but IF it causes you to lose your fast idle, then yes, you will warm up slower. But nothing lost, you shouldn't really be using your idle to warm up anyways.

Anyways, I just looped the hoses back on each other, removed the coolant assembly off the TB, and replaced it with a block-off plate (nothing fancy, just some thin aluminum). Then I put caps on the other two nipples. No biggy. I was more interested in simplifying the system than I was the cooler intake temps. Plus we had a bit of a leak that we couldn't pinpoint. So this eliminated that.

Ok you will not gain shit......sorry to burst your bubble. The air doesnt even have time to sit there and be heated. you think 1HP is noticable? you have to be kidding. well ill let you believe what you want but fact of the matter it just doesnt work..........

DaX · Post by **DaX** » Wed Apr 30, 2003 2:28 am

For every 11 degrees Farenheit you cool your intake charge, that's approximately a 1 HP gain. Actually the air does have time to be heated by the throttle body. I should know, I'm an engineering student and have dealt with some Heat Transfer problems similar to this. A 1 HP increase may not be noticable, but there's no denying the fact that it's still there. Also this in conjunction with other things may cool the intake enough to get a few horsepower gained. People spend hundreds of dollars on other parts of the engine to just squeeze a few horsepower out. Nobody is holding a knife to your throat to do a TB coolant bypass either, so just chill. We're not here to slam each other...

rsbad454 · Post by **rsbad454** » Wed Apr 30, 2003 7:51 am

DaX wrote:For every 11 degrees Farenheit you cool your intake charge, that's approximately a 1 HP gain. Actually the air does have time to be heated by the throttle body. I should know, I'm an engineering student and have dealt with some Heat Transfer problems similar to this. A 1 HP increase may not be noticable, but there's no denying the fact that it's still there. Also this in conjunction with other things may cool the intake enough to get a few horsepower gained. People spend hundreds of dollars on other parts of the engine to just squeeze a few horsepower out. Nobody is holding a knife to your throat to do a TB coolant bypass either, so just chill. We're not here to slam each other...

Ok look who said im slamming anyone, i never called anyone a name or said they were dumb, your bad if you took it that way. as far as engineering im a test engineer for electronic systems on rocket propulsion systems. the entire intake itself is heated by the motor being its in contact with it. so how can that little surface area of a throttle place really heat the air up substantially? Its the ambient air outside that enters the motor that makes the difference of being dense or not. i would really like to see a dyno plot for this little mod. i know a lot of people that have done this mod including myself and it really didnt feel any different than before. now you talk about all the mods put together to make a difference for racing then yes i agree every little bit adds up on the quest for more HP.

turbosi92 · Post by **turbosi92** » Wed Apr 30, 2003 9:50 am

rsbad454 wrote:
DaX wrote:For every 11 degrees Farenheit you cool your intake charge, that's approximately a 1 HP gain. Actually the air does have time to be heated by the throttle body. I should know, I'm an engineering student and have dealt with some Heat Transfer problems similar to this. A 1 HP increase may not be noticable, but there's no denying the fact that it's still there. Also this in conjunction with other things may cool the intake enough to get a few horsepower gained. People spend hundreds of dollars on other parts of the engine to just squeeze a few horsepower out. Nobody is holding a knife to your throat to do a TB coolant bypass either, so just chill. We're not here to slam each other...
Ok look who said im slamming anyone, i never called anyone a name or said they were dumb, your bad if you took it that way. as far as engineering im a test engineer for electronic systems on rocket propulsion systems. the entire intake itself is heated by the motor being its in contact with it. so how can that little surface area of a throttle place really heat the air up substantially? Its the ambient air outside that enters the motor that makes the difference of being dense or not. i would really like to see a dyno plot for this little mod. i know a lot of people that have done this mod including myself and it really didnt feel any different than before. now you talk about all the mods put together to make a difference for racing then yes i agree every little bit adds up on the quest for more HP.

To me, it isn't worth changing it out for the winter. I think the Hondata gasket does more than the coolant by pass ever will. To me, spending time to put the coolant bypass on and off for the season is a waste of time too. Yes, the 1 HP is there....maybe....but none of us will ever notice it. IMO. To each their own.

rsbad454 · Post by **rsbad454** » Wed Apr 30, 2003 11:45 am

main thing it might clear up a couple or hoses

i agree to each their own...............

DaX · Post by **DaX** » Wed Apr 30, 2003 11:46 am

rsbad454 wrote:Ok look who said im slamming anyone, i never called anyone a name or said they were dumb, your bad if you took it that way. as far as engineering im a test engineer for electronic systems on rocket propulsion systems. the entire intake itself is heated by the motor being its in contact with it. so how can that little surface area of a throttle place really heat the air up substantially? Its the ambient air outside that enters the motor that makes the difference of being dense or not. i would really like to see a dyno plot for this little mod. i know a lot of people that have done this mod including myself and it really didnt feel any different than before. now you talk about all the mods put together to make a difference for racing then yes i agree every little bit adds up on the quest for more HP.

I agree with what you've said here, I don't think it makes a SUBSTANTIAL difference, but there will be a difference [also, agreeing that it more than likely won't be felt].

Just curious...from what you said turbosi92, any feedback on the Hondata IM gasket? Big difference? It sounds like it would work well. I'm probably going to invest in one.