Turbo 3.0 playing on the streets

[Ondonti]

This was like two months ago. Went up to salt lake to see Bansheenut and go try to kill the tires on my duster. Went out to "mullet road" and failed to kill the tires because my e brake was disconnected and a pain in the butt to reattach.

Boiled the brakes at the end of the long run, first time that ever happened. Happened again once after that on the street after racing at the track and then happened on my last run at the track when I turned the boost up to 14. I never knew the problem because I dont make it a habit of going fast and then slamming on the brakes. On the freeway you dont need to slow down so much.

I shift pretty slow, but I shift way faster in this video then I do at the track. My 1-2 at the track is freaking slow.


http://videos.streetfire.net/video/T...g72_191891.htm

[gasketmaster]

Cool

[Juggy]

this is a "street" vehicle?????
props to you for driving that thing around in public! lol
talk about 1 stripped down car.....

[moparfreak3]

IMO anything you drive on the street is a "street" vehicle. Just depends on if it is "street legal" or not. :)

[EvilcowRoland]

I get goosebumps watching videos of that car.

[woodrow Z]

Quote:

Originally Posted by EvilcowRoland I get goosebumps watching videos of that car.

its even better in person.

[EvilcowRoland]

I have no doubt it is. If we weren't on opposite coasts I'd ask to come see it.

[Reaper1]

The thing I don't like is the bouncing off the limiter. That is NOT good for the engine, especially in boost. I know the overall purpose was trying to kill the tires, but I'd rather feather the throttle than sit there and bang off the limiter for 5 seconds before shifting....IMHO...YMMV....

[Wpg_Spirit_R/T]

Yea you were on the limiter for a long time... but I liked the custom interior

[Ondonti]

Quote:

Originally Posted by Reaper1 The thing I don't like is the bouncing off the limiter. That is NOT good for the engine, especially in boost. I know the overall purpose was trying to kill the tires, but I'd rather feather the throttle than sit there and bang off the limiter for 5 seconds before shifting....IMHO...YMMV....

Not really sure whats going to hurt on the bottom end.
Even if I was slapping 8000 I wouldnt be worried.

The top end yes. The top end is definitely something to worry about. I wish there were better parts available.

Cant really do rolling burnouts feathering the throttle without an e brake. The tires as crappy as they are stick well. Maybe if I had a 7500 rpms limiter. It will just bog if I part throttle.
A tiny throttle body and other things would make that easier but I dont particularly care about burnouts on the street :P
I burnout on the limiter at the track. I Launch on the limiter at the track.

[Reaper1]

IIRC the limiter not only cuts spark, but fuel also. So, if you are in boost, for that minimal amount of time the engine does go lean. In the end it all ads up. Not to mention that the limiter also adds and subtracts a LOT of energy in a very short amount of time, so it is in effect "hammering" the engine. Another thing to think about is that I know in the unstructions for my Devil's Own it says to avoid hitting the limiter while the alchy injection is on. More than likely this is to help avoid potential hydrolock(it very well *could* happen.

I suppose above all I simply don't like doing that to my engine. I only hit the limiter in my '90 *ONE* time...when I did it on purpose just to see what it would do, I NEVER did it again. The '92 Shadow I had I did it a couple of times due to missed shifts. I've never hit it in my '88. I dunno...I just try to avoid it becuase I know it's there for a reason and I also kow it's not a soft limiter, so it's kinda hard on the engine.

For the track, I'd suggest getting some sort of anti-lag control as that seems to be more of what you need. I personally don't like them for my car becuase of how hard ti is on the turbo, but for what you are doing, it is probably the right solution...

YMMV

[Juggy]

so what chris is saying is pick to have all the stress on either A) the motor or B) the turbo

Im with ondonti on this one, I lauch and burnout off the limiter as well, car makes 5psi boost at idle bouncin off the limiter and its making more then that on the burnout.

if this is the case it sounds like a really high rev limiter would work best, then u can hold it at whatever RPM u needed without risk of hitting the limiter. say set it 1K RPM higher then what your aiming for?

personally i dont really care, I built my car so I could beat the crap out of it, motors dont run forever!!!! wouldnt it suck to know that a bad batch of gas ruins your motor, rather then a nice hard beating.....

[Ondonti]

I just dont worry about a 9krpm capable shortblock on a 6200 rpms limiter. rod stresses are exponential, so i am probably putting 1/4th the amount of stress on my motor that its capable of :(

The nature of most motors though is to run them near their limites. If you build a motor and cant run it to even half its potencial, then why did you build it?

Racers regularly get within 200 rpms of their shortblocks rpm limit...and they feel safe because they know that they are pretty much fine as long as they dont go "too far"

The valvetrain is the weakness in this motor, but the stuff that will break are cheap parts.

I would love an 8000 rpms limiter but there is no way the valvetrain would deal with that. I am not sure if the valves would float, collapse lifters, or both. I know that lifters will break at a very high RPM but I dont know what RPM that is because the person who suffered that had it caused by his mechanic being a retard reving the motor and the aftermarket ECU didnt have a limiter set.

I will probably try to find the RPM that things fail with my setup though. I would need a dyno to catch float I think..and collapse I would need to see if the motor sorta diesels after getting off the throttle and then gets better as the lifters pump back up (that is how 8valve guys have described it!).

[mopar3.0]

yea you need a few more rpm up top. Thats a reason i like msd boxes with the soft touch rev limiter, im not sure what the mega squirt rev limiter is like

[Ondonti]

Quote:

Originally Posted by mopar3.0 yea you need a few more rpm up top. Thats a reason i like msd boxes with the soft touch rev limiter, im not sure what the mega squirt rev limiter is like

I believe MS can do both spark, fuel, and I am sure soft, 2 steps, etc.

I see a lot of MSD boxes fail so I am not too excited about them. Not sure if its owners fault but they are too expensive to be failing.