Has anyone run the tpi throttle body without coolant run through it?
#1
Junior Member
Thread Starter
Join Date: Aug 2010
Location: Millersville Pa.
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1987 IROC-Z Z28
Engine: L98
Transmission: T56
Axle/Gears: 3.70 9 bolt
Has anyone run the tpi throttle body without coolant run through it?
Im getting ready to put a Holley Stealth Ram setup on my 87 Iroc .
I have a 58mm throttle body and I would like to run it without the coolant in the tb. Any opinions?
I have a 58mm throttle body and I would like to run it without the coolant in the tb. Any opinions?
#2
Senior Member
Join Date: Mar 2003
Location: vacaville,ca
Posts: 847
Likes: 0
Received 3 Likes
on
3 Posts
Car: 1988 camaro z28,1997 camaro lt1
Engine: 355 afr 195 heads,tpis big mouth
Transmission: 700r-4 built by me 3-4 z pack
Axle/Gears: 3.42
Re: Has anyone run the tpi throttle body without coolant run through it?
That's one of the first mods to do is bypass the coolant going thru the throttlebody.it will run fine
#3
Supreme Member
Re: Has anyone run the tpi throttle body without coolant run through it?
I've been running my '02 with the coolant bypass mod for almost 10 years...no problems other than a minuscule decrease in mileage. Did mine out of necessity though, bought a used ported tb and the coolant inlet was broke off.
#6
Supreme Member
iTrader: (1)
Join Date: Oct 2005
Location: Glen Park, NY
Posts: 1,050
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1987 IROC-Z
Engine: TPIS II Supercharged w/Nitrous
Transmission: 700R4 Probuilt
Axle/Gears: 3:73 Richmond 12 Bolt
Re: Has anyone run the tpi throttle body without coolant run through it?
Once, I started to change my engine around, I found it to be not necessary and removed it..
#7
Member
Re: Has anyone run the tpi throttle body without coolant run through it?
One of the biggest benefits is you'll then be able to remove the TB without messing with coolant lines.
Trending Topics
#8
Junior Member
Join Date: Aug 2012
Location: Portland, or
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 iroc z
Engine: 5.0 tpi
Transmission: 5 spd manual
Re: Has anyone run the tpi throttle body without coolant run through it?
does it actually help anything or is just more convenient when it comes to taking off the TB...
#9
Guest
Posts: n/a
#11
Supreme Member
iTrader: (1)
Join Date: Sep 2005
Posts: 26,123
Received 1,688 Likes
on
1,283 Posts
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Has anyone run the tpi throttle body without coolant run through it?
Most cars have something similar.
Don't forget, the factory has to do things to make cars world-wide universal off the production line, and cover all foreseeable variations in operating conditions; emissions, weather, fuel, whatever all else. Not every adaptation is "necessary" or even "desirable" in ALL circumstances.
Removing it makes very little difference to driveability or mileage that I've noticed, except in very cold climates.
Don't forget, the factory has to do things to make cars world-wide universal off the production line, and cover all foreseeable variations in operating conditions; emissions, weather, fuel, whatever all else. Not every adaptation is "necessary" or even "desirable" in ALL circumstances.
Removing it makes very little difference to driveability or mileage that I've noticed, except in very cold climates.
#12
Senior Member
Join Date: Aug 2009
Location: greenfield indiana
Posts: 913
Likes: 0
Received 2 Likes
on
2 Posts
Car: 86' IROC-Z....and 5 other 3rdgens
Engine: 383 hsr
Transmission: built 700r4
Axle/Gears: stock 3.23, 10bolt
Re: Has anyone run the tpi throttle body without coolant run through it?
primary function of it is to keep tb from iceing up in the colder climates below freezing. ditch it.....
#13
Guest
Posts: n/a
Re: Has anyone run the tpi throttle body without coolant run through it?
It is, Iv had the bypass done for years...if your is hot you need a better cooling system...
#14
Senior Member
Join Date: Sep 2004
Location: N. Ky
Posts: 719
Likes: 0
Received 0 Likes
on
0 Posts
Car: 86 T/A - 70 Z28/RS
Engine: Broke - 350
Transmission: 700R4 - M22
Axle/Gears: G80, 2.73 - ZQ9 G80 4.10
#15
Supreme Member
Re: Has anyone run the tpi throttle body without coolant run through it?
#16
Senior Member
Join Date: Aug 2009
Location: greenfield indiana
Posts: 913
Likes: 0
Received 2 Likes
on
2 Posts
Car: 86' IROC-Z....and 5 other 3rdgens
Engine: 383 hsr
Transmission: built 700r4
Axle/Gears: stock 3.23, 10bolt
Re: Has anyone run the tpi throttle body without coolant run through it?
primary was the key word. doesnt mean there are no other functions or use for it.
#17
Supreme Member
#18
Supreme Member
iTrader: (13)
Join Date: Apr 2005
Location: Not in Kansas anymore
Posts: 7,732
Likes: 0
Received 11 Likes
on
11 Posts
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Has anyone run the tpi throttle body without coolant run through it?
Close hood ;everything heats up to same temp from heat soak
In any case if what you believe is true, you are dealing with a boundary layer where only the slow moving air touching the TB bore can pick up heat.
The bulk of the airflow flows inside this layer and is not affected by heat transfer ;even less so as the TB is opened and more air flows
In any case if what you believe is true, you are dealing with a boundary layer where only the slow moving air touching the TB bore can pick up heat.
The bulk of the airflow flows inside this layer and is not affected by heat transfer ;even less so as the TB is opened and more air flows
#19
Senior Member
iTrader: (3)
Join Date: Oct 2012
Location: SC
Posts: 725
Likes: 0
Received 0 Likes
on
0 Posts
Car: '87 IROC-Z | '99 SS
Engine: LB9 | LS1
Transmission: 700R4 | T56
Re: Has anyone run the tpi throttle body without coolant run through it?
Glad I found this thread. Found another mod to add to the list.
#20
Senior Member
Join Date: Apr 2007
Location: wallingford,ct
Posts: 668
Likes: 0
Received 0 Likes
on
0 Posts
Car: 91 formula ws6
Engine: 355 tpi OBDII
Transmission: 4l60E
Axle/Gears: 2.73 with 4th gen brakes
Re: Has anyone run the tpi throttle body without coolant run through it?
been running it for 3 yrs now. no adverse effects.
#22
Guest
Posts: n/a
#23
Supreme Member
iTrader: (31)
Re: Has anyone run the tpi throttle body without coolant run through it?
Yeah, speaking of IAT's, that's another mod I did to mine. I got a V6 intake duct and relocated my IAT sensor to the air duct instead of it being on the bottom of the intake plenum.
Last edited by Pat Hall; 01-21-2013 at 12:07 AM.
#24
Re: Has anyone run the tpi throttle body without coolant run through it?
That's creative to remove the water passage in the bottom plate. I could have saved $2 buying stainless steel bottom screws. Not to mention the 2 rubber caps.
#25
Guest
Posts: n/a
Re: Has anyone run the tpi throttle body without coolant run through it?
#26
Supreme Member
iTrader: (31)
Re: Has anyone run the tpi throttle body without coolant run through it?
Wrong, the MAP sensor is on the back passenger side of the plenum. IAT, or Intake Air Temperature sensor is on the bottom of the plenum. My car is an 89, which doesn't use a MAP sensor anyways, just a MAF sensor. You get a more accurate air temp reading with the IAT sensor in the air filter ducting. When it's in the bottom of the intake plenum, you've got all the surrounding engine heat that affects the reading.
#27
Supreme Member
iTrader: (31)
Re: Has anyone run the tpi throttle body without coolant run through it?
On mine, I didn't go quite that far in cutting up the bottom plate. I just took a cutoff wheel and removed the 2 spouts where the coolant hoses go on. You can leave the coolant passage unplugged and it doesn't affect anything since it's not being used any more. The throttle body looks cleaner with the spouts removed and it gives you more room when removing the water neck to replace a thermostat.
#29
Supreme Member
Re: Has anyone run the tpi throttle body without coolant run through it?
The water passages in the throttle body are to prevent icing in very cold climates. If you are in Alaska or anywhere else where freezing temps are common, you may want to keep the passages in place. Anywhere else, they aren't necessary. The first time your throttle sticks open after several minutes on the highway on a very cold morning, you'll know why the engineers ran coolant through the TB. The pressure drop across the throttle causes the air temp to drop and ice to build up. As far as cooling down the inlet air charge, that's very beneficial. Think about making the hood louvers functional on your IROC and installing cold air or ram air intake.
#30
Supreme Member
Re: Has anyone run the tpi throttle body without coolant run through it?
The water passages in the throttle body are to prevent icing in very cold climates. If you are in Alaska or anywhere else where freezing temps are common, you may want to keep the passages in place. Anywhere else, they aren't necessary. The first time your throttle sticks open after several minutes on the highway on a very cold morning, you'll know why the engineers ran coolant through the TB. The pressure drop across the throttle causes the air temp to drop and ice to build up. As far as cooling down the inlet air charge, that's very beneficial. Think about making the hood louvers functional on your IROC and installing cold air or ram air intake.
Alright, this makes sense now...the throttle cable was starting to stick for the first time last week since it was BRUTAL cold outside here in Atlanta (coldest it's been in at least a year). Never a problem at any other time though.
Starting to wish I didn't buy a TB with a broken coolant passage regardless...
#31
Supreme Member
Join Date: Jul 2009
Location: Kitchener, ON
Posts: 2,327
Likes: 0
Received 7 Likes
on
5 Posts
Car: 1988 GTA
Engine: LB9
Transmission: T5
Axle/Gears: 3.45
Re: Has anyone run the tpi throttle body without coolant run through it?
After driving for 20 miles with the TB bypass, YES -the TB will be cool to the touch, and will continue to be cool as long as the engine is idling. Shut the engine off and heat soak will work it's way up the runners and up to the TB.
#32
Supreme Member
Join Date: Jul 2009
Location: Kitchener, ON
Posts: 2,327
Likes: 0
Received 7 Likes
on
5 Posts
Car: 1988 GTA
Engine: LB9
Transmission: T5
Axle/Gears: 3.45
Re: Has anyone run the tpi throttle body without coolant run through it?
Also, I'm not sure whether cooler TB directly has any performance benefit, but I'll take the cool TB over a hot TB any day.
#33
Re: Has anyone run the tpi throttle body without coolant run through it?
I know this threat is over a year old but I was wondering if anyone has ever thought of using the TB coolant passage as a way of cooling the TB in hot climates? I was thinking of connecting a length of hose to the forward facing spout and a deep funnel to the other end of the hose. The funnel would then be mounted in such a way (possibly towards the bottom of the car) so that it would collect cool air from the front and force it through the TB. Anyone?
#35
Supreme Member
iTrader: (-3)
Join Date: Dec 2012
Posts: 1,184
Likes: 0
Received 1 Like
on
1 Post
Car: 1991 firebird
Engine: TBI 305 (built)
Transmission: T5
Axle/Gears: 4.10
I know this threat is over a year old but I was wondering if anyone has ever thought of using the TB coolant passage as a way of cooling the TB in hot climates? I was thinking of connecting a length of hose to the forward facing spout and a deep funnel to the other end of the hose. The funnel would then be mounted in such a way (possibly towards the bottom of the car) so that it would collect cool air from the front and force it through the TB. Anyone?
#36
Senior Member
iTrader: (3)
Join Date: Oct 2012
Location: SC
Posts: 725
Likes: 0
Received 0 Likes
on
0 Posts
Car: '87 IROC-Z | '99 SS
Engine: LB9 | LS1
Transmission: 700R4 | T56
Re: Has anyone run the tpi throttle body without coolant run through it?
There is no need to "cool" the throttlebody . Just be removing the hot coolant lines running to the throttlebody cools the upper intake system dramatically. So much so, after driving you can usually touch the plenum, runners, throttlebody without burning your fingers instantly.
#37
Re: Has anyone run the tpi throttle body without coolant run through it?
Overall intent is to cool down the incoming air charge even more without investing too much time or $$$. Ice is great for race day but not for daily driving. I thought about building a separate cooling system like the one 1991sleeper mentioned (using an 81 Corvette windshield washer reservoir with built-in 12V pump & a small aluminum tranny cooler) but it's a bit time consuming (but not necessarily a bad idea). In the end, I figured the "ram air funnel" setup would be the easier & cheaper way to go.
#38
Supreme Member
iTrader: (13)
Join Date: Apr 2005
Location: Not in Kansas anymore
Posts: 7,732
Likes: 0
Received 11 Likes
on
11 Posts
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Has anyone run the tpi throttle body without coolant run through it?
As previously mentioned above ; GOOGLE " boundary layer"
Only very proportion of the airflow is in actual contact with the TB bores so the effect of a " cold " TB would be minimal.
If you want to cool the incoming air you need something mounted directly in the airflow it self
Like the DEI CryO2 system that has a small inter cooler in the intake ducting and uses CO2 to cool it .
Wired through the TPS , it is only activated when you go WOT.
http://www.turbomagazine.com/insidet..._system_cryo2/
http://www.designengineering.com/con...get-more-power
Only very proportion of the airflow is in actual contact with the TB bores so the effect of a " cold " TB would be minimal.
If you want to cool the incoming air you need something mounted directly in the airflow it self
Like the DEI CryO2 system that has a small inter cooler in the intake ducting and uses CO2 to cool it .
Wired through the TPS , it is only activated when you go WOT.
http://www.turbomagazine.com/insidet..._system_cryo2/
http://www.designengineering.com/con...get-more-power
#40
Supreme Member
iTrader: (31)
Re: Has anyone run the tpi throttle body without coolant run through it?
Yeah I gotta agree with 1991 sleeper, running an electric pump and a tranny cooler or something like that would probably be the most effective way of doing it. However, the end result would probably be such a minimal difference that it's probably not worth the time or effort. As others have already said, just eliminating the hot coolant running through it is usually the most you really need to do.
#41
Junior Member
Join Date: Sep 2013
Location: Conroe, Texas
Posts: 33
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1987 Trans Am GTA
Engine: 350 TPI modified
Transmission: 700R4 modified
Axle/Gears: 3.27
Re: Has anyone run the tpi throttle body without coolant run through it?
mine been broke off for over 20 yrs. no problems.
#42
Junior Member
Join Date: Jun 2014
Location: Iowa
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
Car: 16' Silverado
Engine: 5.3
Re: Has anyone run the tpi throttle body without coolant run through it?
I'm removing the coolant portion. The other part is for the egr system, correct? Why can't that be eliminated as well if egr is required for emissions?
#43
Member
Join Date: Jun 2002
Location: Bluegrass State
Posts: 181
Likes: 0
Received 0 Likes
on
0 Posts
Car: 85 Trans Am
Engine: LB9
Transmission: Finally Fixed (T5)
Axle/Gears: 3.27
Re: Has anyone run the tpi throttle body without coolant run through it?
It's not EGR, it's the IAC.
Thread
Thread Starter
Forum
Replies
Last Post
1992 Trans Am
History / Originality
27
05-10-2023 07:19 PM
Fast355
DFI and ECM
14
12-02-2016 06:33 PM