"Parmas" Motor

[Parmas]

Thanks for the help guys but I really care about this motor and I prefer being safe than having a wrecked motor for just a few more rpm.

I am thinking of let it run from 6500rpm till 7000rpm and see if it will keep making power and torque on the stock head.

I am thinking of boosting till 16psi for now and see how it goes after trying it on the drag strip.

The main issue in this country is fuel octane since you don't get constant octane from the station. I will be using the Lucas octane booster to tune and keep giving her every refuelling to be safe.

The other issue is tire traction and wheel spin from a stop. The tires are Toyo R888 rally semi-slick tires but still having wheelspin above certain rpm launches. I am trying to set a launch control switch to help with this issue.

[Parmas]

Today was the dyno day and we succesfully managed to get 210WHP @ 6800rpm and 184 torque at 5000rpm on the wheels with only 10psi of boost. We had some trouble with the AEM tru boost controller which wasn't increasing boost as it should be. I am sure that with 14 psi we could have managed 250WHP with stock cams / head internals.

The car was tried on street and got wheel spin issues till 3rd-4th gear. Now I need some serious rubber and I am thinking of a an AVON/Mickey Thompson slicks. I don't know if the drive shafts will hold the load on the drag strip so any feedback from boosted yaris owners with slicks are likely appreciated! Also what rim + tire size should I use to combine it with the C160 6spd 4.5:1 transmission?

http://www.youtube.com/watch?v=9jCzU3sU53w

[cali yaris]

First of all CONGRATS on reaching this landmark! I know the project has been a challenge but your persistence is paying off!

You should be able to burnout and launch in 2nd gear for best drag results. Does your management allow you to program a 2-step?

I'll go check what wheels/tires I am running for drag racing, I think they work really well.

[cali yaris]

managed to get 210WHP @ 6800rpm

What did the curve look like up top?

[Parmas]

Originally Posted by cali yaris

First of all CONGRATS on reaching this landmark! I know the project has been a challenge but your persistence is paying off!

You should be able to burnout and launch in 2nd gear for best drag results. Does your management allow you to program a 2-step?

I'll go check what wheels/tires I am running for drag racing, I think they work really well.

Thanks garm I really appreciate your feedback.

Yes the ecu is capable of a 2 step launch control and there is actually a switch installed on the handbrake to enable it when I want to. This was never tried since it was installed recently so I am not sure which are the correct ignition retard timing and enrichment settings for a good launch on the strip.

I would probably try your advice of 2nd gear and begin with launch control from 5000rpm -20 Degrees ignition till I get it right.

Next friday I booked for a Japs nightout drag strip so I am trying to get an average quarter mile time.

[cali yaris]

my two-step is programmed to flood the exhaust mani and build boost for launch at 16 psi. I don't think we changed the timing just for that.

I launch at 5500, but 5000 will probably be fine too. The slicks change things a LOT, you can launch much harder. I'm still getting used to that.

[Parmas]

Originally Posted by cali yaris

What did the curve look like up top?

The curve inreases gradually until reaching 6800rpm. Above that range there wasn't any gain on power just a constant peak 211BHp till 7000rpm.

I should be able to get a curve printout for your reference.

What slicks brand are you using and rim size/profile/wide measurement?

[Parmas]

I came across a friend which have a new race gate (external wastegate) for sale on a bargain price. He intended to put it into his own but scrapped the idea.

The race gate is 38mm and with an unknown spring pressure = unknown lowest boost pressure, BUT that is not a problem right now.

The problem is LIMITED SPACE to put it in mate to exhaust manifold and downpipe which is really a complicated thing to do....

This gate would cost me the price of its own + fabricating custom work + hassle of bumping into other fuel / oil / water / cable components so after all this I ask >>>

1 . IS IT WORTH THE HASSLE OF DOING THIS?

2. WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF THIS GATE VS INTERNAL?

3. WOULD THE ENGINE BE AT ANY RISK OF BOOST SPIKES BY KEEPING THE INTERNAL WASTEGATE?

CHEERS

[cali yaris]

Not sure it's worth it. Nice to be able to change out the spring (or the whole thing) when needed for the boost you are going to run. But if you're using a boost controller, you should be somewhat protected from surges and spikes either way.

I think that at your current position with the project, it's not a top priority to re-do a bunch of stuff.

[ilikerice]

as the saying goes, "dont fix what already works"..

[Paris vvt-i]

From what i know:

advantages of external
1)better boost control
2)less backpressure
3)lower EGTS

advantages of internal
only cheap

I ordered an emusa external for my tsport turbo as well

[Parmas]

Originally Posted by Paris vvt-i

From what i know:

advantages of external
1)better boost control
2)less backpressure
3)lower EGTS

advantages of internal
only cheap

I ordered an emusa external for my tsport turbo as well

You forgot the disadvantages ! :)

My only issues in regards with the external wastegate is :

1. limited space to fit it on my custom manifold
2. A hassle of more hot pipes under the hood !

[cali yaris]

sooooo.... is your wheel hop eliminated yet?

[Parmas]

Originally Posted by cali yaris

sooooo.... is your wheel hop eliminated yet?

No Sir, I didn't have time to work on it since I am solving some other issues regarding high idle. It seems that the 2ZZ throttle body I bought this year has actually more air breathing than expected because of some wear and tear on the butterfly.

I am waiting for another and hope it is good this time !

I never knew I would have all these issues!

[cali yaris]

It never stops. I just did this to my clutch:

[Blown_xa]

wow, I have never seen a pressure plate break in half! Looks like a 6 puck? Thought you had exedy stage 2?

[cali yaris]

I had Exedy Stage 1 a long time ago. The picture is a Clutchmasters Stage 4!

[Parmas]

Originally Posted by cali yaris

I had Exedy Stage 1 a long time ago. The picture is a Clutchmasters Stage 4!

OUCH!! How much did km did you do with that clutch ?

I tought clutchmasters are good though!

Its time for a new better one !

Will the below fit the yaris :)