Thanks for the info. If you can let me know what the total cost was for your tune injectors and EMS. I will probably take my car to Warren as well if you get good results.

I am very happy with the 7pound pulley. But I will eventually move up to the 9pound once I get the injectors and EMS.

Since you are getting your car professionally tuned with a stand alone EMS I think you are ok as far as wear and tear goes. There are people on this board who have been running their 7psi pulley with just the standard comptech FMU like me and have had no problems. But I don't recommend it. The route your going is much safer and will yield better results.

Of course the 9psi pulley would put more wear on your engine and S/C but it all depends on how you drive it.

I'll tell you one thing though your gonna need a clutch. If you haven't thought about upgrading you should start.

Josh

 

One more thing, you were asking about wear on the high compression engine. Just to put things in perspective, Ultimate Racing has a turbo kit out running 7pounds of boost and as you probably know turbos are at full boost at around 5K rpms on the S, dependant on the size of the turbo. If they can run their S reliably which they have as a daily driver. I don't think you should have any problems with the 9pound pulley on the S/C, since your upgrading your injectors and ECU.

There are others on this board that have run their UR turbo kit at 9psi reliably with no other upgrade just tuning.

Like others have said, you'd be ok just slapping that 9pound pulley on there.

 

Well, I think you'll find that re-tuning to go from a 7lbs pully to a 9 lbs pulley will be much greater than $300 just for re-tuning alone (after dyno time). That's almost $500 to upgrade at a later date for something that you can effectivly do for free now. (The cost of an EMS and tuning are sunk costs for you at this point).

I strongly belive that the 9lbs pulley is quite safe *with proper tuning* and with an EMS.

I'd put the $500 towards a high boost motor buildup at a later date, but again, that's me.

 

The only issue with running higher boost on a high compression motor is detonation. If you're not detonating, you are safe.

 

I have the Ultimate Racing kit and I'm running 9lbs. Conservative timing and good A/F is key. Don't be too greedy and you'll be safe.

 

Why 650cc injectors for 7lbs of boost? That's way overkill, no?


Added: Here's a link to injector calculations.

 

Yes I think that's a bit high but its ok the duty cycle will just be lower. And I'm guessing they are probably going to leave out the high pressure fuel pump and comptech FMU.

 

I'm by no means a knowledgeable person on these matters, but simply going larger just makes tuning more of a hassle, no? No HP fuel pump? That comes with the standard sc kit.

 

Are you sure? Even if I'm tuned perfect and safe, isn't the motor still getting more wear due to higher 9psi?

 

The only reason that comptech supplies a high pressure fuel pump and FMU with their kit is because the kit does not come with any fuel managment system like a piggy back ECU or stand alone ECU. That way the FMU can adjust the fuel according to boost. But I'm pretty sure if you have larger injectors and some sort of piggy back or stand alone you no longer need the high pressure fuel pump or FMU.

Take a look at some of the turbo kits out there, they do not require a high pressure fuel pump or FMU. They come with larger injectors and either AEM EMS or Greddy E-manage.

I know that the UR kit does not require an upgraded fuel pump. Since the kit comes with larger injectors and an e-manage.

But the rev-hard kit does require the high pressure pump since it runs on stock injectors.

I think some of the turbo guys can clear this up for us... Kane? Or maybe even Sideways since he's running a large amount of boost I bet he threw out the Comptech FMU and went all stand alone.