CL9 T.B. Coolant bypass - results recorded

[shmivic]

Decided to do the "best mod ever" and bypass the coolant lines on my CL9

very easy mod to do - around 45mins.

Test results were recorded over a two day period for control measures and reading taken by a calibrated Raetheon infrared thermal gun.

Day one
Ambient Temp: 30 C
Time: 1pm

Pre mod:
Temp after 1hr freeway drive;

Airbox (GruppeM): 26.2 C
Intake pipe: 27.7 C
T.B: 55.1 C
Manifold: 72.8 C

Day two
Ambient temp 31 C
Time: 1pm

Post mod:

Temp after 1hr freeway drive;

Airbox (GruppeM): 25.9 C
Intake pipe: 27.6 C
T.B: 41.2 C
Manifold: 63.4 C

Average drop of around 10-15 Deg C

[elitee]

Did you use the DIY from tsxclub ?

[shmivic]

^ no, i just did it my own way - they seem to do it a strange way requiring fittings.

if your clever you can use the oem lines without any extra parts.

[BraXta]

and how was that done =D

[white_ep3_civic]

Can u show pics of how u did this?

[elitee]

Would also be interested !

[felixd]

well TB mod is good but theres not much hp difference

[white_ep3_civic]

Bit if it costs nothin, why not do it?

[shmivic]

i didnt take pics sorry,

the way i did it:

1: removed the short coolant hose which runs from the head (right next to the radiator bleeder) to the zinc-coated metal bend.

2: removed the long hose from the same metal bend which runs to the throttle body.

3: removed the medium length hose from the black, steel water passage tube which runs around the front of the block at the outlet directly behind the throttle body.

4: used the original longest hose from the metal bend and ran it from the black, steel water passage tube at the block (behind the throttle body) upto the water port at the head (near the bleeder)

5: then used the shortest hose which is originally from the head to the metal bend to link of the inlet/outlets on the throttle body

-Done

[shmivic]

well TB mod is good but theres not much hp difference

its not for hp purposes, mainly economy.

ive already noticed my average dropping 0.2L/100 on the dash

[felixd]

kool aid mod hehe

it will be better if u put TB P2R spacer on

[tron07]

whats the drawback of this mod?

[shmivic]

whats the drawback of this mod?

slightly longer (10-20seconds) cold start warmup if you live in an icy location.

CL9 K24 doesnt rely on the throttle body coolant to control the cold start as much as the old B-series engines.
It is there for a part of the cold start but can be removed without any real negative issues.

K-series engines uses a Injector base coolant system to control the majority of the cold start.

[integral90]

Did this yesterday - car feels a tiny bit more torquey at lower RPM

[akina]

^^ I call bs, siff u'll feel any difference at all :p

[shmivic]

i didnt notice any difference in power either, but L/100km has changed from 8.5 to 8.1

[ricerockets]

umm are the hoses fairly small in diameter? and also by zinc do you mean the greenish pipes? and last question the steel water passage tube is the black pipe that runs underneath the intake manifold yes?

sorry the questions, but in return ill take photos and write up the DIY for you ok? hahaha

[shmivic]

umm are the hoses fairly small in diameter? and also by zinc do you mean the greenish pipes? and last question the steel water passage tube is the black pipe that runs underneath the intake manifold yes?

sorry the questions, but in return ill take photos and write up the DIY for you ok? hahaha

yeah youve got it. all correct!

go for gold on the diy with pics if you have the patience..... unlike me! lol

[MrHeeltoe]

Decided to do the "best mod ever" and bypass the coolant lines on my CL9

very easy mod to do - around 45mins.

Test results were recorded over a two day period for control measures and reading taken by a calibrated Raetheon infrared thermal gun.

Day one
Ambient Temp: 30 C
Time: 1pm

Pre mod:
Temp after 1hr freeway drive;

Airbox (GruppeM): 26.2 C
Intake pipe: 27.7 C
T.B: 55.1 C
Manifold: 72.8 C

Day two
Ambient temp 31 C
Time: 1pm

Post mod:

Temp after 1hr freeway drive;

Airbox (GruppeM): 25.9 C
Intake pipe: 27.6 C
T.B: 41.2 C
Manifold: 63.4 C

Average drop of around 10-15 Deg C



Very neat!

Questions:

1- do you have a thermal intake manifold gasket?
2- (more of a statement) It would prove much more soundly if you could show a drop in intake air temperature.

[shmivic]

Very neat!

Questions:

1- do you have a thermal intake manifold gasket?
2- (more of a statement) It would prove much more soundly if you could show a drop in intake air temperature.

Not yet Marcus, will be an item in my next order for sure!

Unfortunately i dont have a thermocouple probe for my Fluke Dmm yet so i couldn't measure the air temp

My results were taken with regard to the effectiveness of the bypass i.e.; heat-soaking of standard components.

[ricerockets]

hey shmivic can you check over the and see if its all good?

links here:
http://www.ozhonda.com/forum/showthread.php?144527-CL9-Throttle-body-coolant-bypass

[shmivic]

^yeah seems about right!

how is your economy now?

[ricerockets]

haha i wouldnt have a clue hahaha no trip computer on the '04 euros ==" ill have to use the trip A function and see how many kms i get out of a full tank of petrol

suprisingly though i did somehow feel an increase of power from about 4k rpm so its pretty good, i can see how this could give a few more hp since a cooler throttle body and intake manifold should result in a subtle drop of temperature in the air being fed to the engine, even if it is minor haha

but then again... it could be vtec controller deciding to work all of a sudden haha

[shmivic]

to gain the most from this little mod you would really want a thermal gasket set and to remove the injector base heating if you have the time.

but to do that it means I.M off, cutting, adapter plate and new thermal gasket. too much work imo but i would still get the gaskets.

[IEVAQ8]

im assuming this can also be done on a K20???

anyone have a DIY or a picture step by step to the OP's instructions ???

[integral90]

Yeah I've got the P2R thermal gasket and a cold air feed. Car does drive better, slightly

[elitee]

Will have a goo at it this weekend

[shmivic]

i'd say it wouldnt be too different with a K20, their basically the same motor.

pull your intake and battery out and have a look?

[IEVAQ8]

i'd say it wouldnt be too different with a K20, their basically the same motor.

pull your intake and battery out and have a look?

lol, there isnt any intake on atm (intake mani is off the car)
and the battery is in the boot.....

please take a pic or 2 and post up

[integral90]

lol, there isnt any intake on atm (intake mani is off the car)
and the battery is in the boot.....

please take a pic or 2 and post up

If the intake manifold's off the car then so is the throttle body and you can't do it

[IEVAQ8]

If the intake manifold's off the car then so is the throttle body and you can't do it

i can still do it, however i can plan ahead...

[exquisit]

instead of bypassing the tb by looping the 2 lines into one, is it possible to buy bungs and block off the 2 barbs which supply the coolant?
and then put bungs/plugs on the barbs on the tb?

[Razer]

woahhh simon you can get 8.5L from city driving?!?!?! Im getting 9.7-9.9 if I drive normally, and thats after my pulley install...before I had the pulleys done i rarely seen 10L consumption on my screen. mayb its cos mines an auto. oh by the way the pulley really helped the low end torque, and helped a lot on the fuel economy. nowadays the car shifts at 2k rpm and the power delivery feels the same as 3k rpm prior to the new pulleys.