I havent seen this mod on this site before, its called a throttle body coolant bypass. It does just that, sorry i dont have pics but ill do the best i can to explain.

under our tb's on the back side of the egr pipe there is a sending coolant line if you take that out and and replace it with a longer hose (3/8 i believe) and connect it to the recieving line from the tb your tb will run 20-30 degrees cooler at normal operating temp, which has been dynoed to give 7-10 horse for chevy 350 tpi's. Its not too much but for the money spent, 2 bucks, on hose its fairly considerable and worth the time.

 

interesting...

 

i thought this mod only works on the 3rd gens or something....

 

Take some pics so we know what know what you're talking about. This sounds cool if it doesn't harm the car.

 

i heard it don't work

 

well i was just reading the stickies again and found a section about it. conclusion was it doesn't work.

 

It may or may not work but what if you reversed it's function? Charge the flow with chilled water or refrigerant or similar? Not enough to freeze the butterfly function but enough to bring down the TB from say 200deg to maybe 50-100deg?

 

I've always heard you shouldn't do this. I forgot the reason. I believe it has to do with some buildup of crap on the throttle body.

 

just happened to see this. during my header install, sr20den asked if i had done the coolant bypass yet and i had not. he has done it on sr20's, his old vq30 and now on his vq35. he experienced no ill side effects on any of them so we went ahead and did it. i could not speak for power gain due to the headers but i seriously doubt you would see any power gain but it should be good for reducing temps.

 

Yeah, welcome to the 20th century. This does not work, even if it did don't you think someone would've posted it before you did?

 

alright think about this now ok... even if you lower the temp of the throttle body the air rushes much to fast across it when your driving to make any difference.

 

Ever felt the intake manifold after driving around for awhile? The air will heat right back up.

 

I read were it didnt work. The only think it would do was get your throttle to stick cuz of all the heat and all.But thats just what I heard for our maxes. A lot of mustang guys do this mod too.

 

I did it to my 94 Z28 and it didn't work because the intake manifold still stayed scalding hot. I'm about 6 years wiser now and I don't see how this mod can do anything. The reason the coolant is routed thru the TB is to keep the throttle blade from icing.


Dave

 

Hey fellas, I think he was saying not to completely bypass the coolant flow to the TB, only to extend the length of the hose that flows the coolant. I don't see how this would help anyway, because even with a longer hose the fluid inside will still be the same tempature (what ever your water temp. gauge is reading). I think you'd be better of just putting a bottle of Water wetter in your cooling system! It's suppose to help reduce coolant tempatures & some people swear by it?

 

Anyone really do a real dyno test of this? Anyone actually see wht the 350 and mustang guys are talking about. I know this mod works. It reduces the amount of heat added to the intake air. Depending on how the dyno is conducted can change whether or not this mod works...You need to do it while it is warm, both times. If you dont understand that part of it, you prolly wouldnt understand the principle of the mod.

I have seen dyno charts and it has been proven. It is a trick that has gone way back with muscle car guys.

 

My bother drives a ten second mustang. he is a mechanic that has built many, many 8-10 second mustangs. He says the best way to achieve this cooling fo the throttle body is to have the engine at operating temp, turn off the engine and ice down the tb for several minutes. Then start it up and make a pass. It is a hassle, but he says that he and all of his friends do it. However, I don't think they do it at the track, just on the streets.

 

id believe it, there are a lot of things u can do to make the engine run cooler, which adds some HP. my dad recently did something to our Shelby Cobra which cooled down the engine by about 30 degrees

 

i only have a way to measure air entering the scoop going to the intake so i have no proof of lower temperatures. i know im in th 4th gen section but i dont have an issue with the manifold getting scolding hot due to the composite plastic build. it only gets warm when its hot outside, its been driven hard and its parked. since no one has posted up a bad side effect and two of the fastest maximas (sr20den and blubyu2k2) around run with it, ill stick with it on my slow 2k1 auto.

 

On the Mustangs we also changed the termastat from A 180 degree to 160 degree one. It is suppose to lower the engine temp by allowing the coolant to flow sooner. Can we do the same? And will it help?

 

Could you close all the coolant passages and get better performance? If someone who has done this which hoses must we reconnect.

 

i believe i saw somewhere that we had a 192-195 thermostat but i could be wrong. if that is the case then a 180 would even be an improvement but i have not found another nissan vehicle that runs that temp where it would be interchangeable. i know we can run the radiator cap from a VG30TT which would change it from 13lbs of presure to 16lbs if im not mistaken. i know a bunch of sentras run this cap but not too many maximas.

 

i hate you, my dad drives a boniville

 

toofast240,
I think what your brother was saying is to ice down the entire manifold. This is a common thing to do at the race track. I see people do it all the time when there waiting to make there next run. It would be useless only to ice down the TB, because the heat diplacement of the manifold would basically warm the TB right back up. So ask him again, my guess is hell tell you the entire intake manifold including the TB, not just the TB.

Pearl99GXE,
Replacing the thermostat with one that will reduce coolant tempatures allows the coolant to remain in the radiator longer to have more time to cool. It doesn't allow the coolant to flow sooner, if the coolant flowed quicker then it wouldn't have enough time to cool down.

Sloppymax,
I'm not sure what kind of gains running a 16lb radiator cap would do for us. My only thought would be that it would put 3lbs. more pressure on the tanks of our radiator. I don't know if this would be a good idea, simply because it would place more stress (pressure) on the radiator & hoses. I don't think that increasing the pressure in the cooling system will reduce tempatures, maybe some other org members have some insight on this.

 

Nostixoxide,
I'm no expert, but I thought the lower temp thermostat open up sooner to allow the coolant to flow through the engine and cool it down. When the engine is below the temp it stays closed so the engine can heat itself up.

 

i thought it only worked with the cali's. i heard you can plug somehting up wiuth a bb. i heard it last might!

 

One last time guys:

There is no such thing as free hp! Spending 2 or 5 or 10 or 15 or $20 will never gain us 5 hp, if that.

Other cars have it made because they CAN get upto 50hp, if not more, with only spending $5 or less. How u ask? Obviously if one knows his **** he can modify an ECU or even make a boost controller at home for a car like a wrx. And we all know that boosting psi on turbos yields 100, 200, 300+ hp on certain motors. Now of course it takes a stronger, usually bigger turbines and motors to support such boost etc. but you get the point - WE DON'T HAVE IT MADE!!!

 

Pearl99GXE,
Well you have to look at the function of the radiator. "What does it do"? It cools the fluid in the cooling system, the engine doesn't cool the liquid it heats it. The lower temp thermostat will open sooner but when it is fully opened the amount of fluid that flows through it is less, because it restrict's the opening more then a higher temp thermostat would. For example it you completely removed the thermostat all together (no thermostat installed) would your fluid temp. be higher or lower? It would be higher because the fluid would flow through the radiator so quickly that the radiator wouldn't have enough time to lower the tempature of the fluid.

 

Are you sure about that. When I had a broken thermostat, I could not get heat in the car while it was moving. The car had to be stopped to warm up.

 

Positive! What would happen if the fluid in the radiator got up to 250degrees, how would it cool down? Theres a difference between while the fluid is getting hot & when the fluid is hot! It would have taken longer for the fluid to get hot since it is flowing before it reached tempature which kept the fluid cool because it had to wait for the engine to build up enough heat to warm the liquid. But once the liquid gets hot, it will not be able to drop the tempature, because the radiator cannot do it's job (cool the liquid).

 

Thanks. Like I always says, "You learn something new everyday" or "Never too old to learn something"

 

No problem, the cooling system is a hard thing to grasp. I always try to look at things from both sides to help me understand how they function. I learn new things everyday myself.

 

http://cgi.ebay.com/ebaymotors/ws/eB...category=33602
anyone try it??

 

so now a radiator cap gives hp???!!!!

 

Sloppymax,
Check out what Maximum99 has just posted regarding the radiator cap. I guess raising the pressure inside the cooling system will increase the boiling point of the coolant & help to reduce the tempature of the fluid. Good find Maximum 99...

 

How sure are you that it doesnt work? Are you using theory or have you tested it? Ive seen the slips on thirdgen.org (Camaro's), it was posted a while ago and i dont know if i could find it but i have driven my car around until it was at operating temp, felt my tb and it was noticabley cooler. Thats enough proof for me. And just because i might have been the first to post about it doesnt mean it doesnt work.

CONCLUSION: You can only use theory so much, results are the only means of proof. Therefore im not trying to prove anything, if you want proof than try it, and if you dont then hold onto your opinions with pride and use theory.

 

sorry to intrude guys. but will im assuming you have a replica factory five racing shelby not the real 427 shelby right. either way damn that car is amazing. o and that might work actually but you would have to find a way to cool intake manifold then you get some serious gains.

 

No one said the cap gives HP, but your motor will thank you even if it keeps it a little cooler. Everyone knows a heatsoaked motor looses it pep(purpose of oilcoolers).This may be a good mod for the summer.

 

this is the PAGE that i am getting most of my info from. i know the information is generated for the sentra but i cannot see how the sentra's cooling would be stronger than ours. obviously it would not be a good idea to use this on a weak cooling system with issues such as worn out radiator hoses, very high mileage water pump and so forth.

 

ummm, I want proof,

otherwise, it's crap.