I am posting under this section because anyone with a turbo could benefit from this experiment which already proved my friend to go from 133mph traps to 138mph trap.

My friend Trevor which locally runs a red Dodge Stealth R/T custom built a line to the waste gate actuators feeding it directly from the brake master cylinder vacuum reservoir.

He managed to retain the waste gate flappers close much longer thus allowing the car to build up a few psi more.

The reason why I am posting this is because he is using a pair of Evo III turbos which are basicly a clone of the Evo 8 turbos except the rotation of the wheel and the shape of the flapper but stil similar or almost identical performance.

My friend runs on pure C16 plus the equivalent of two #15 nozzles running on pure 100% methanol.

I want it to share with you guys because I know for a fact that there are a few people on this forum like TTPengineering(Scott) that is pushing the stock turbo to its limits.

I am not trying to invent the wheel, I know that people put spacers on the mounting screws of the waste gate actuator and I also know that people shorten the rod of the actuator to delay the aperture.. and I know that a stronger spring inside the actuator would also give you the extra delay.. this is is not the case, this is vacuum assisted. Needless to say, this only works if you are planning on getting the max boost on your turbo.

By the way, my friend got the second highest trap speed in the world on the street class(daily driven) No NOS category on any 3000GT/Stealth, remember, This happened in Tucson this past Saturday at 3100ft and 99 degrees

pics here:

www.evoixgrl.blogspot.com

Carlos

 

Why not just weld shut the internal gate and run an external gate?

 

Nice Friggin Dogs Mang.

 

I knew someone would ask me that. Yes, it can be done but it involved much work and is not as easily reversible.

With the extra line directly feeding it from the Vacuum reservoir you can attach the line in a couple of minutes and be done with. After racing at the track you can go back and undo the line in a couple of minutes to run a MBC again.

With the welding is tougher. But good question though, it sounds like you are sharp on this subject.

Carlos

 

How long has your friend been running c16 plus two m15s of meth for?

 

This is interesting...

 

Running a vacuum line to the WG actuator, and not having any boost going to it basicly is the same as running with no boost control, or having your wastegates welded shut, but it is reversible for street use. Interesting idea.... but running an external WG is much simpler on an EVO with one turbo that is right up front in the engine bay than it is to run two external gates in a 3000GT.

No one I know is running an EVO on C-16 all day every day along with alcohol injection.... and if they did they would be using an upgraded turbo, not the stock unit.

You have to remember, that we have a single 16G feeding a 2.0 motor, your friend has two 16G's feeding a 3.0 motor (1.5 liters per turbo) so, for us the single 16G is maxed out long befor two 16G's are maxed out on a 3.0 motor.

Keith

 

He runs Methanol all the time. He is one of the pioneers on methanol usage, he has been using alcohol/methanol for over 6 years.

He only races 100% c16 when he races at the track but normally runs a mixture of much lesser octane. He still traps nearly 130 and run low 11's when using a lesser ocatne mixture.

Carlos

 

Keith(Fourdoor),


I agree with absolutely everything you said. If any Evo owner where to run their stock Evo Turbos to the max and run all day on C16 and methanol the easiest route would be a larger turbo to start with.

My friends scenario is that he already tried at least 4 different twin turbo setups being the EVO III's the best package for price/performance and spool up.

This guy uses his car as a experiment, he tunes his own cars and he rent the tracks with a few other guys so that he can have a full size track for tuning testing and 1/4 mile improvement.

As far is having to reach the turbos, yeah, I understand, the Evo has a better location however he can just run boost line extensions and making the connections in a upper location for easy access.

Carlos

 

This thread should be renamed "A little trick to run uncontrolled max boost and blow up your engine."

 

i think its a pretty awesome trick for people looking to push the limits. Thanks for sharing!!!

 

EFIMR,

You should know the guy I am talking about, he is Trevor from 3SI.org , I know I have seen you on that forum before.


Carlos

 

Just curious Carlos, what were your friend's E.T.s on the 133 & 138 mph runs?

 

I posted the link wre you can see the pics I took. He ran his car on Saturday the 22th July. He ran a 11.01 in Tucson SIR which is one of the worst tracks in the USA. The run was made at 99 degrees.

The 133mph pass was in Phoenix and he ran a 10.9 back then. Keep in mind that Phoenix is 1900ft lower than Tucson.

you can view the pics here:

www.evoixgrl.blogspot.com

Carlos

 

I'm not familiar at all with the exhaust pumbing on the V-6 Stealth....But being a twin turbo'd V-6 wouldn't each bank's exhaust manifold require its own separate external(remote) gate? Unless there was some sort of cross-over pipe..which would allow for a single gate to be located there. But, like I said I never laid eyes on a Stealth's engine...so I'm probably way off.