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  #51  
Old 19-07-2017, 09:40 AM
rotrex rotrex is offline
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Default Re: Nozzle spray angle...

Again,
please measure the pressure after the throttle body before swapping air filters.
Only takes a few minutes and gets you a real idea how good or bad that or the new filter is.

You can literally route a silicone pipe through the passenger window. it is only a temporary measurement.
Hook up a analog gauge from eBay and record it with your cell phone. After than watching the gauge at WOT.

Just swapping and hoping things get better is the most expensive way to do things.
This is why most car dealers this days lost the art of properly diagnosing issues.
They read codes and swap expensive ECUs and other modules to only find that it was a single blown or corroded fuse socket in the end or water in spark plug holes.
They don't care and write you a 1000$ bill that should have been a $50 bill with common (car) sense.
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  #52  
Old 20-07-2017, 02:15 AM
jondee86 jondee86 is offline
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Thumbs up Re: Nozzle spray angle...

Quote:
Originally Posted by rotrex View Post
Please measure the pressure after the throttle body before swapping air filters.
Good suggestion Since the pressure loss of the ducting between the throttle
plate and the s/c inlet is fixed, I shall tap a fitting into the throttlebody in front
of the throttle plate. That way I can measure the pressure loss of the section
of ducting with filter that will be changed.

I have found cheap China made digital differential pressure meters on Aliexpress,
and this gives me a good reason to buy one, plus an infrared thermometer for
reading the temperature from each cylinder at the exhaust manifold.

Cheers... jondee86
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  #53  
Old 16-08-2017, 01:23 AM
jondee86 jondee86 is offline
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Smile Re: Nozzle spray angle...

Existing tapping was for the evap system and read manifold pressure at low
throttle openings, so not suitable for reading intake pressure drop. I drilled and
tapped the throttle body for a new barb and used that. You can see it in this
pic of the new intake system...



Ran tests with the OEM filter and intake system and then with the new system.
The results turned out like this...

Intake Pressure Drop
Apexi Intake; 1.43kPa @ 7490rpm
OEM System: 5.91kPa @ 7480rpm

Engine Manifold Pressure
Apexi Intake: 143.3kPa @ 7490rpm
OEM System: 136.4kPa @ 7480rpm

So by reducing the intake pressure drop by 4.48kPa (0.65psi) I gained 6.9kPa
or exactly 1.0psi of boost I am more than happy with these results. When
working with small capacity engines like the 4AGE, every little bit counts !!!

Cheers... jondee86

Last edited by jondee86; 26-08-2017 at 03:01 AM. Reason: More information added...
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  #54  
Old 26-08-2017, 08:55 AM
jondee86 jondee86 is offline
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Default Re: Nozzle spray angle...

Getting some heat transfer into the alloy intake tube as it is resting on the
top radiator hose. Going to look for a different hose with a shape that will
allow it to clear the intake tube. Always something else

Cheers... jondee86
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  #55  
Old 30-08-2017, 09:36 AM
rotrex rotrex is offline
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Default Re: Nozzle spray angle...

1 PSI for free :-)
It looks like you are about half way there.
I'd have a close look at the tubing past the TB and any related edges, ridges or couplings to the intake of the SC.
The SC intake itself may also be restrictive due to tight corners or edges.


The same is true for the SC outlet to the intake manifold. I'd check for imperfections. The outlet is not as sensitive as the intake side regarding losses, but still.

I am sure with an other close look and a little fettling of the pipes and couplers you might find that other missing PSI or 2.

Heat transfer though this pipe is largely irrelevant except at prolonged idle and for at the first few seconds in after driving off in city traffic.
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  #56  
Old 02-09-2017, 03:25 AM
jondee86 jondee86 is offline
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Default Re: Nozzle spray angle...

Unfortunately I think that the ducting between the throttlebody and the
head is about as good as it is going to get. I did a bit of porting on the
short side radius where the discharge manifold meets the s/c mounting
plate and on the intake manifold where it meets the ducting. Removed
any weld that broke thru into the ducting and generally tried to get the
coupled joins lined up and as close together as practical.

Any further improvement will be hard to come by and at this stage I must
settle for what I have. The next few months will be dedicated to refining
my tune and ensuring that the engine operates safely under all conditions.

Cheers... jondee86
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  #57  
Old 27-10-2017, 03:42 AM
jondee86 jondee86 is offline
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Smile Re: Nozzle spray angle...

Small update. Currently running on the 87mm dia pulley and making around
71-72kPa of boost while running very rich when getting into the new area
at the top of the map. Working on getting those tuned a bit better now.

My ECU can log in lambda but my WBO2 gauge can only indicate in AFR. So
to avoid confusing myself I shall continue working in AFR. Just drained the
water out of the tank and replaced it with 50/50 v/v methanol mix. So going
by your previous advice I shall continue to adjust the map to get the actual
recorded AFR as close as possible to my (conservative) target AFR's.

I shall probably look at installing the 75mm dia pulley in a few weeks, as
there was very little that required adjusting when I installed the 87mm dia
pulley in place of the 105mm dia. Once I have the 75mm dia pulley on the
engine I will look at getting the car on the dyne for some professional tuning
and to see if getting the ignition and fuel closer to optimum will help find a
bit more power and improve my gas mileage !!!

Cheers... jondee86

PS: Does a methanol and water mix always turn milky ?
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  #58  
Old 27-10-2017, 06:59 AM
Richard L Richard L is offline
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Default Re: Nozzle spray angle...

If it turns milky, the methanol is most probably contaminated with hydrocarbon. It will damage the aquamist components.
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  #59  
Old 28-10-2017, 09:04 PM
RICE RACING RICE RACING is offline
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Default Re: Nozzle spray angle...

Quote:
Originally Posted by jondee86 View Post

PS: Does a methanol and water mix always turn milky ?
Not sure if its 'normal' but when I get 100% methanol then do the blend to water (WM50 by mass) it always went milky as well as quite hot, after some time it settles down and it goes totally clear.

I have some of the above that is in a long term test glass container and its crystal clear after 7 years (1/2 air in there the rest WM50), the components I have sitting in there are some valves, fittings, ATL fuel foam, and lines I use. I test the parts every so often and they all are working as brand new items.

I'll take a photo later if I remember and post it up.
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  #60  
Old 29-10-2017, 06:07 AM
Richard L Richard L is offline
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Default Re: Nozzle spray angle...

You are correct, it cleans after a few seconds. But it is doesn't, don't use it.
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