coolant by-pass kit - a good idea?
Thread Starter
Burning Brakes
Joined: Jun 2002
Posts: 1,097
Likes: 0
From: Muskogee, Oklahoma
coolant by-pass kit - a good idea?
I saw this kit for sale.
The factory set-up routes heated coolant through throttle body. This installed tube direct connects coolant lines.
Why did the factory do this in the first place?
Is this a worth while mod?
The factory set-up routes heated coolant through throttle body. This installed tube direct connects coolant lines.
Why did the factory do this in the first place?
Is this a worth while mod?
☠☣☢ Semper Ebrius ☢☣☠
Joined: Jun 2001
Posts: 83,301
Likes: 4
From: Virginia
Cruise-In IV-V-VI-VII Veteran
St. Jude's Donor '06
Originally Posted by Bullet
Why did the factory do this in the first place?
Is this a worth while mod?
Burning Brakes
Joined: Feb 2002
Posts: 954
Likes: 21
From: White Oak, GA
Simple, inexpensive with regular hardware store hose/clamps.
I did it for a couple of seasons, found it made no difference in performance.
If you switch back to allowing the coolant to warm the throttle body in the winter, you run the risk of screwing something up with the repeated efforts. You know, like cutting a hose or breaking something.
Not worth the effort.
I did it for a couple of seasons, found it made no difference in performance.
If you switch back to allowing the coolant to warm the throttle body in the winter, you run the risk of screwing something up with the repeated efforts. You know, like cutting a hose or breaking something.
Not worth the effort.
Race Director
Joined: Sep 2004
Posts: 16,398
Likes: 0
I almost did this mod too, I'm glad I saw this thread.
It just goes to show merchants will put "gain 5hp" on just about anything.
I'm sure the high performance hood seal should gain about 20hp by itself right??
It just goes to show merchants will put "gain 5hp" on just about anything.
I'm sure the high performance hood seal should gain about 20hp by itself right??
Race Director
Joined: Nov 2003
Posts: 11,063
Likes: 38
From: Menifee CA
I'm sure the high performance hood seal should gain about 20hp by itself right??[/QUOTE]
NO U WILL GAIN somewhere in between 10-15 RWHP if u do the COOLANT BYPASS and a HOOD SEAL depending on ur mods
NO U WILL GAIN somewhere in between 10-15 RWHP if u do the COOLANT BYPASS and a HOOD SEAL depending on ur mods
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Michael S. Palmer
Race Director
Joined: Oct 1999
Posts: 17,710
Likes: 1,219
From: Phila PA, Bonita Springs FL
I'll disagree....
It took me 4 yrs to do this mod, and I am glad I did....
I can not vouch for increased performance or with dyno numbers, but I do think throttle response it a littler crisper/better, and I DO think cooler air is entering the intake.
Before the mod, I drove my car for 30 minutes, before doing the mod, but I felt the top of the throttle body, and it was fire hot...
After doing the mod, I drove the 30 minutes back home, felt the top of the throttle body, and it was LUKE cool!
I couldn't believe it, before the mod, I could barely put my finger on the TB it was so hot, and after the mod, it was like luke cool...
I started to think, and realized this was a pretty good thing to do. Everyone says the air flows thu the TB so fast it won't pick up any heat, but in my field of HVAC, we insulate exterior duct work so air moving thru it won't absorb heat.
I think its worth doing. Feel the TB, if you don't have the mod. I'll bet its HOT. Do the mod and then feel it....
Cooler air into the intake is better...
Mine stays...
It took me 4 yrs to do this mod, and I am glad I did....
I can not vouch for increased performance or with dyno numbers, but I do think throttle response it a littler crisper/better, and I DO think cooler air is entering the intake.
Before the mod, I drove my car for 30 minutes, before doing the mod, but I felt the top of the throttle body, and it was fire hot...
After doing the mod, I drove the 30 minutes back home, felt the top of the throttle body, and it was LUKE cool!
I couldn't believe it, before the mod, I could barely put my finger on the TB it was so hot, and after the mod, it was like luke cool...
I started to think, and realized this was a pretty good thing to do. Everyone says the air flows thu the TB so fast it won't pick up any heat, but in my field of HVAC, we insulate exterior duct work so air moving thru it won't absorb heat.
I think its worth doing. Feel the TB, if you don't have the mod. I'll bet its HOT. Do the mod and then feel it....
Cooler air into the intake is better...
Mine stays...
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
Originally Posted by YO-EL
I'll disagree....
It took me 4 yrs to do this mod, and I am glad I did....
I can not vouch for increased performance or with dyno numbers, but I do think throttle response it a littler crisper/better, and I DO think cooler air is entering the intake.
Before the mod, I drove my car for 30 minutes, before doing the mod, but I felt the top of the throttle body, and it was fire hot...
After doing the mod, I drove the 30 minutes back home, felt the top of the throttle body, and it was LUKE cool!
I couldn't believe it, before the mod, I could barely put my finger on the TB it was so hot, and after the mod, it was like luke cool...
I started to think, and realized this was a pretty good thing to do. Everyone says the air flows thu the TB so fast it won't pick up any heat, but in my field of HVAC, we insulate exterior duct work so air moving thru it won't absorb heat.
I think its worth doing. Feel the TB, if you don't have the mod. I'll bet its HOT. Do the mod and then feel it....
Cooler air into the intake is better...
Mine stays...
It took me 4 yrs to do this mod, and I am glad I did....
I can not vouch for increased performance or with dyno numbers, but I do think throttle response it a littler crisper/better, and I DO think cooler air is entering the intake.
Before the mod, I drove my car for 30 minutes, before doing the mod, but I felt the top of the throttle body, and it was fire hot...
After doing the mod, I drove the 30 minutes back home, felt the top of the throttle body, and it was LUKE cool!
I couldn't believe it, before the mod, I could barely put my finger on the TB it was so hot, and after the mod, it was like luke cool...
I started to think, and realized this was a pretty good thing to do. Everyone says the air flows thu the TB so fast it won't pick up any heat, but in my field of HVAC, we insulate exterior duct work so air moving thru it won't absorb heat.
I think its worth doing. Feel the TB, if you don't have the mod. I'll bet its HOT. Do the mod and then feel it....
Cooler air into the intake is better...
Mine stays...
Race Director
Joined: Oct 1999
Posts: 17,710
Likes: 1,219
From: Phila PA, Bonita Springs FL
Your post it too technical for me...
I'll put it another way, weather your calculations apply or not...
Even though the TB is only a few inches long, I'd rather the air pass thru a luke cool TB, than a fire hot one.
I'll put it another way, weather your calculations apply or not...
Even though the TB is only a few inches long, I'd rather the air pass thru a luke cool TB, than a fire hot one.
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
Originally Posted by YO-EL
Your post it too technical for me...
I'll put it another way, weather your calculations apply or not...
Even though the TB is only a few inches long, I'd rather the air pass thru a luke cool TB, than a fire hot one.
I'll put it another way, weather your calculations apply or not...
Even though the TB is only a few inches long, I'd rather the air pass thru a luke cool TB, than a fire hot one.
Melting Slicks
Joined: Jul 2003
Posts: 3,427
Likes: 2
From: Fountain Inn, South Carolina
Originally Posted by Evil-Twin
@ 10 cubic feet a second, air doesnt have any time to heat up or cool down.. the theory is if you can drop the intake air temp by 10 degrees you will get 1.3 horse power increase. The throttle body even without the coolant water circulating through it will be 120/130 degrees passivelythrough engine convection .....to gain 1 hp, you will need to drop that temp 10 degrees in less than a second. You couldnt drop that temp 1 degree in a second. The air is not in the throttle body long enough to exchange any heat @ 600/700 cfm.
Le Mans Master
Joined: Sep 2002
Posts: 5,187
Likes: 6
From: Oakville Ontario,Canada
god...cant believe I got "talked into " buying this... I was SO naive when I got my car, i actually didnt know about the forum and went by one of the vendors catalogs and then the salesguy saying what a cheap mod for a few hp....ugh...good thing I dont drive it in the winter
Melting Slicks
Joined: Jul 2003
Posts: 3,427
Likes: 2
From: Fountain Inn, South Carolina
Originally Posted by GettReal
god...cant believe I got "talked into " buying this... I was SO naive when I got my car, i actually didnt know about the forum and went by one of the vendors catalogs and then the salesguy saying what a cheap mod for a few hp....ugh...good thing I dont drive it in the winter
Me too... But now I know better. I removed mine and it is sitting on a shelf in the garage. There was absolutly no differance in 1/4 mile times. Besides, I did not like how close it was to the drive belts on the engine. If you want more power, save up the pay checks and add a bunch all at once. Maybe a head cam kit.
Race Director
Joined: Oct 1999
Posts: 17,710
Likes: 1,219
From: Phila PA, Bonita Springs FL
No problem you guys..
I just wanted to give you my take on why after 4 years I finally did it..
Beyond that, I have NEVER heard of a TB "sticking" in cold weather.
Everyone talks about it, but 5 yrs here on this forum, LS1.com & LS1Tech.com, I have NEVER heard of this happening...
I just wanted to give you my take on why after 4 years I finally did it..
Beyond that, I have NEVER heard of a TB "sticking" in cold weather.
Everyone talks about it, but 5 yrs here on this forum, LS1.com & LS1Tech.com, I have NEVER heard of this happening...
Melting Slicks
Joined: Jul 2003
Posts: 3,427
Likes: 2
From: Fountain Inn, South Carolina
I never heard of one sticking either... I heard it was an emmision issue in cold weather and it made some sort of small difference in essimission by keeping the throttle bottle from icing up.