Boosting your 3CT or 3CTE

[Vorenus]

++++++++This post has been copied here with permission of Thread originator, Clintj++++++++++

ClintJ There's always a bigger turbo
« on: December 07, 2007, 10:29:36 PM »
I recieved a question from a member and wanted to post it so that anybody can take advantage of the info.
To increase boost of the turbo the wastegate actuator needs to be moved away from the compressor housing. SO undoing the 2 bolts that hold it on and then on the backside of the plate placing 1 washer under each bolt so that the whole diagphram moves fwd by the space of the washer should see an increase in boost.
How much, I cant say. This is a cheap and inexpensive way to boost your engine more but I would advise against this method because from what I have seen of the diagphram used on the CT9 that it has very little travel.

So spacing it out and reducing its travel to almost nothing might not let the wastegate open sufficiently..
Have a look on ebay for boost bleed valves. They are cheap and they dont stress the already fragile diagphrams as much as spacing does.
If you have the 3CTE then boost shouldnt go past 11psi as you will start to hit fuelcut. An increase in boost should also have a increase in fuel to take advantage of the extra airflow.
If you have the 3CT then there is no fuelcut and you can run as much as 18psi but this will drop quickly once 3000rpm is reached. Fuel can also be adjusted easily by the aneroid on the mechanical pump.

Clint

Daven2695 Dave
« Reply #1 on: December 08, 2007, 08:31:40 AM »
good post clint

owenmall
« Reply #2 on: December 09, 2007, 02:29:09 PM »
respect given, now where is the "aneroid" (sounds painful) to be found on the fuel pump and how would I go about adjusting it.

ClintJ
« Reply #3 on: December 09, 2007, 07:14:18 PM »
If you can post a pic of the 3CT pump then I can circle it. The Aneroid just limits the fuel before boost is produced.
There are other adjustments on the pump that control idle and load. but I need a decent pic to identify them.

Clint

owenmall
« Reply #4 on: December 09, 2007, 10:26:07 PM »
will have a look

makh
« Reply #5 on: February 21, 2008, 09:58:59 AM »
Clint,
I have a small problem with the 3CTE in my corona. Sometimes, on the highway, I suddenly lose power, seems to be a fuel cut. I guess its from excessive turbo pressure.
Now, can I simply put a 15-25 PSI gauge in there and connect it to the intake manifold to measure the turbo pressure?

If not, what is the best and cheap way to monitor your turbo boost?

ClintJ « Reply #6 on: April 17, 2008, 07:04:56 AM »

the guage will tell you what you need to know. Boostcut on the lucida 3cte is around 11~12psi on mine. There are some very cheap made fuelcut defenders on ebay that will solve this cutoff by clamping the voltage on the map sensor near the peak voltage that creates the cut.
EG. if 12psi equals 4.2Volts and thats where the computer tells the pump to stop fuel because of the over boost situation then you trim the fuel cut defender to 4.1Volts so that when boost rises to 12 or more psi the map sensor voltage will not go past 4.1Volts because of teh clamp meaning you can run full boost.
Do a search on ebay for fuel cut defenders. rough;y about $30~40USD or cheaper maybe.
Once the voltage is clamped at its peak no more additional fuel will be added and this limits your total power but the management would of cut this off anyway so you are officially at the peak of the engine management.

Clint

owenmall
« Reply #7 on: May 01, 2008, 07:28:05 PM »

Clint

these show some parts marked with paint that suggest somebody has adjusted them and set them.
in the top picture there is a component which looks like an actuator with a vaccum or pressure pipe.

ClintJ
« Reply #8 on: May 04, 2008, 09:58:45 AM »
Ive marked the aneroid. this will add or subtract fuel based on manifold pressure.. This isnt the overall way of how much fuel is delivered once boost comes on but a way of limiting fuel until boost is produced.
A naturally aspirated engine of the same capacity doesnt need as much fuel as its turbocharged brother so the turbo pump with the aneroid needs to be able to deliver more fuel because of the increased capacity from the added boost from the turbo.
When your putting around with no or little boost then you really only need a small amount of fuel delivered. The aneroid makes the bigger turbo pump run less fuel when the engine isnt boosted..

There are other adjustments on the pump that will adjust the governor thus lifting the redline of the engine.
There should also be a way of adjusting the full throttle stop so that more throttle is achieved.This will be located on or next to the arm where the throttle cable attaches. This will deliver more fuel in the short term until the governor pushes the sleeve on the plunger off the spill port..

The governor will cut back fuel by a set of counter weights inside the pump.
The pump will have some external screws on or near the throttle cable for idle adjustment..
I can take a guess at what the yellow marked screws are and I know what they should do but where they are located is a little bit off from other pumps that I have seen... If I could get my hands on on then I could say with 100% certanty what does what exactly...

If Id only had a 3ct pump.....

Clint