I am wondering if anyone has hit over 600rwhp, and if not what they need left to do it. I was on the Scion TC site the other day and seen that a Scion TC stage 3 kit will boost up whp to 424 at 16 or 17psi with stock internals. That just blows my mind. I would think someone would at least be running a 600wrhp monster street Z out there by now. Anyone know if shariff has the parts on his car to do it? Whats holding everyone back with built motors and piggybacks?

 

nothing is holding anyone back anymore, other then the nerve to push the limits.

if everyone else thinks like I do, they are just taking it easy one step at a time. 600whp is not difficult... everyone is just taking baby steps thats all... its expensive enough to do this, we would all like to go thru as few as motors as possible to figure out the basic list of required parts. give it just a few more months, and I bet there will be at least 4-5 guys over 600rwhp. I know I will be.

my car was running too hot and boiling the coolant at 575ish RWHP. So I am taking care of a few things now. My buddy Jon is building a new intake manifold for me... with a goal of, obviously, increasing flow and maximizing the powerband a little higher upward in the RPMs. Also we are looking ensure adequate plenum volume and dimensions for equal air distribution into the cylinders to help equalize individual cylinder tuning.

To get more heat out of the engine I am increasing the engines ability to evacuate heat with dual 3" exhaust and even larger downpipes. Peter@APS told me several months ago how much heat I would be evacuating if I would just go to a much larger exhaust... if I had listened to him that might have saved me from scrubbing up the hone and rings when my pistons almost seized on me from the heat of a very high speed run i made.

To increase cooling system capabilities for high end runs I am maximizing radiator airflow with a custom V-Mount setup in the front.... with all that I have different pistons, and I have changed the fuel injection system to run dual MAF sensors PRE-TURBO for the greatest consistency in tuning... MAF is how the OEMS do it, its how sooo many 600+ rwhp 03 Cobras are doing it with the best looking A/F curves I ever seen, and its how I am going to do it now.

To make the power more useable (575rwhp was tire spin in 4th gear on the regular street tires) I am swapping in the automatic 3.3FD. I am still making my decision on which aftermarket LSD I am going to use... most likely the Quaife. I will be tuning to a significantly higher redline this time to keep me from having to shift into 5th gear in the 1/4 mile... as this shift was sabotaging my previous runs.

There are no secrets to making power like that... its more along the lines of using brute force and not trying to make as much out of as little as you can. If you just do everything, it will make the power... no doubt... so long as you dont let anything hold you back and you tune it right.

Next year the question will be: Is anyone making 800rwhp? The year after that it will be 1000rwhp. I think last year 400rwhp was pretty big news... 200hp a year is a decent rate if you ask me.

Well... at least now I am sure you guys can see why I havent posted anything about my car in a while. Hopefully it will be back on the road before snowfall!!!

 

Car version 2 in Delaware has the car and the motor, but i think they are waiting for aem to come out with an ems system for the z. they got the built motor and cams with greddy twins.

 

i'm going to try for it. but like phunk says, this stuff isn't cheap and i would hate to see windows in the engine compartment. my broken parts wall is already getting full, lol.

 

It's certainly possible to produce big WHP from the VQ engine, the more difficult aspect is to transmit this amount of power via the standard drivetrain.

Currently APS has developed 743 WHP fromthe VQ engine and many of these performance parts will hopefully find there way through production and onto customers cars over the next 6 months, good times ahead for sure.

James

 

I think most people know that cams and head work are almost required to touch 600 without an entirely new plenum or 3' custom exhaust. Obviously the heat has held some of us back and everyone has a different answer to the problem. In a few months we will hopefully know which solutions work the best and which ones do not. I will be trying to hit the magic number in less than a month if all goes well.

 

[QUOTE=phunk]

My buddy Jon is building a new intake manifold for me... with a goal of, obviously, increasing flow and maximizing the powerband a little higher upward in the RPMs. Also we are looking ensure adequate plenum volume and dimensions for equal air distribution into the cylinders to help equalize individual cylinder tuning.

To increase cooling system capabilities for high end runs I am maximizing radiator airflow with a custom V-Mount setup in the front.... with all that I have different pistons, and I have changed the fuel injection system to run dual MAF sensors PRE-TURBO for the greatest consistency in tuning... MAF is how the OEMS do it, its how sooo many 600+ rwhp 03 Cobras are doing it with the best looking A/F curves I ever seen, and its how I am going to do it now.

QUOTE]


Crazy **** as usual from the vq pioneer

 

was the three inch exhaust and an upgraded radiator enough to prevent this heat from melting the engine/pistons? please share how 743whp figure came about, was this a single dyno run...sustained driving, ...what kind of coolant temps did you see with these power numbers?

thanks for sharing

 

Hmm... seems like heat buildup seems to be the next problem to solve on built VQs. Is it a flow issue of coolant in the block or just inability to get enough air with the IC?

 

Is APS working on a radiator for the G? No one makes one for the G so some guys are having the 350z koyo fabricated to fit. I don't wanna go down that route if possible.

 

3 inch true dual exhaust is a must. And the idea is to make as much whp safely, with as LITTLE boost as possible to keep the turbos spinning in their peak efficiency range. In the case of the Greddy and APS TT's, this is about 15-16psi. I am sure G_Man will be posting his dyno charts soon, but we got 543whp out of his car, with only 12psi of booost pressure on pump gas.

600whp is just around the corner for me..stay tuned...it will be sooner than you think.

 

That was also my goal but it really is a COSTLY endeavor. I should have the fuel system for 600rwhp ironed out here in about a months time so the car will be capable. After that you run into finding new drivetrain solutions which I do not think I want to deal with at the moment. One thing I have learned is not to sacrifice reliablity for power.

 

To the original poster for this thread....check out sgpracing.com. They have a Z over 600rwhp.

 

This made me **** my pants. Haven't seen it in awhile. If anyone wants to see what I'm talking about look here http://www.big-boys.com/articles/leeroy.html.

Cooling issues seem to be a major problem in this car. Large radiator and inline pump is something that will help. Even guys with the Koyo are having problems with the system creating air pockets, no matter how well it is burped. I know someone recently at CPrace was having these problems. A year from now we will probably laugh at these problems. I know a good trick that no one has used except for one person at sgp and that is a Radiator Breather Tank such as this http://www.greddy.com/prod_rad_breather_tank.htm This is sure to help the airlock issues.

 

Do you have one of these? Where did you mount it? Any pics?

 

I will post pics of mine in a few weeks. SGP is putting it in the car.

 

Not yet but this guy that got his stuff done at SGP lives here in Florida and I met him the other night in Downtown Orlando. You don't see two TT built motor G's in the same place in florida. This was the only way he could get the car to not bubble over and overheat during our summer weather. It is installed where the overflow bottle is in this shot. This is his car, FYI. Here is a link to his car on SGP. http://store.yahoo.com/sgpracing-store/mi03ing3.html

 

Funny you mention this. My car was bubbling this morning. I was stuck in traffic and the temp starting rising. My outdoor temp gauge was reading 92 degrees at 8:30am. The index was supposed to feel like 110.

 

Yes I was waiting for them to be emailed to me.

This dyno is with no exhaust just test pipes. I am getting a custom 3" done this week. The boost spikes to 14psi and then tapers down to about 12.5psi. I was told this is because the boost controller is trying to hold the boost at which is was set.

 

gman: graph looks great... thats the same power i was making with a standalone(100% engine control) at 12.5psi thru that 2.25" borla. you must be running those 550s near the max!! I notice your graph looks very smooth... I wonder if the E-Manage Ultimate doesnt create that same chopiness that was in everyones graphs with the blue E-Manage at those HP levels.

keep an eye out for issues with localized coolant temps... watch your coolant overflow and see if you can do 4-5 repeated runs thru 4-6 gear and see if it overflows out of the bottle. those are the conditions in which I was able to get the heat to really come on strong and cause localized boiling. i would be curious if running with open test pipes is enough heat evacuation to prevent this.