CL9 T.B. Coolant bypass - results recorded

[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

[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/showthr...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.