Bosch is who designs the cartridge for both Injector Dynamics and Fuel Injector Clinic. IIRC each company only merely designs their own spray nozzle if I were you I would go with one of the two. They are top dogs in the injector market ID being flow balanced to 1-2% and FICs being balanced to no more than 3%.

Charles. I still haven't had time to measure the studs to get you an answer sorry but I do believe they changed to their ARP 2000 grade material for the studs so that could be where the much higher allowable torque specs are coming from. both my mains and heads were torqued 3 equal stages @ 85

So, getting back to topic - how much boost pressure can a built VQ37VHR withstand? :) 16,17 psi ?

Mine block is 9.0:1, arps l19, without e85 or water/meth injection.

Isn't the stock intake plenum the max limiter of boost we can go with?

That's not a question that can be answered without a lot more info. 25 psi out of a tiny turbo is a lot less air than 25 psi out of a large one. The motor may hold up fine with 15 psi out of a gt28 and explode at 15 psi out of a gt42.

It's all R&D at this point. No one knows. **** none of us actually know where the stock block limits are yet.:rofl2:

My Built 4.5L has already seen 30+ PSI... Then again my motor costs more than a new Z...

The Stock intake manifold is going to start to be questionable around 800rwhp... Also boost is going to be relative to each build the turbos on the build and supporting mods.

However, if you are comparing block to block I know the regular built GTM Motors and ones built by Speed 4 Sale have handled deep into the 20+ psi range.

If you go with one of the more built motors like mine then you will need to be looking at other supporting mods to truly take full advantage of their capabilities. for example I run a GTR intake Manifold, I have built Heads and etc...

yea you have to know what you want out of your car
track car
drag car
drift car
street car

For me its all about the street car life and 600-700rwhp will have me killing most cars i come across on the street

i do the drag strip maybe 3times a year and this car is my summer car so that hp level will work great for me.

small example last weekend i pulled on a 2013 gtr in 4th gear having him only jump pass me as i shifted into 5th gear (paddle shift wtw)

Since your talking about it. How much boost have you pushed?

I'm hoping to hit 18-20 on pump and maybe 25 on e85 or race gas

I could be wrong but I dont see this turbo going over 21psi.

This turbo did 36 psi on supra it should be able to do 25..

Sasha would be the one to ask as he has done the research with the turbo. I can only go off of what persicion tells me..

Mine maxed out around 20.

Well I guess I be building twins for my self then to...lol..

Did I read that right you made 570ish on 20 psi

max out at 20psi you should be making over 650 at 20 psi
on a 6266 ???

from what i hear the 6266 turbo does not even wake up til 15+ and should be good til 30 or so

Mustang Dyno

I understand that but I wouldn't think it would be that low...my talon made 502 awhp on a 6266 32psi on mustang dyno.....how the he'll is my little 4 banger any where close to the 370z..that's what I don't understand. .

Not all mustangs are set up the same. Some read lower than others.

I wonder if he means maxed on pump gas. That would make more since as far as max out the turbo...but idk. I know they read different. But if it's pump I understand but e 85 I don't him should able to push more psi with race gas or e85. My talons on e85..

TopgunZ runs E85

My tuners Mustang read 13-15% low. I've seen some that read as much as 20% low.

Idk then time for a bigger turbo...lol..

Sorry just re-chiming in here. I have never tuned off pump. Always E.

That max psi is situational. The #'s may be off. That's why when I stated "I may be off here but I cant see this turbo hitting more than 21", was due to the condition of my readings.

Basically, I only had that turbo spooled up like that for a short amount of time. I never even hit 5250 to cross the two line curves. As you can see though, the torque does flatten out and the boost wasn't appearing to climb much at that point.

This reading happened because I was told incorrectly by everyone and their dog how to hook up my dual wastegates to a MBC. Everyone was wrong so my turbo basically was unrestricted and spooled as much as possible. I of course figured out how to hook it up correctly and then made 533whp 480tq on 10psi (converted to DJ).

Converting the 570 to DJ would be more like 655tq. No idea what my HP would have been but it would be over 700 for sure.

We never got to play with timing or anything cuz we couldn't run that amount of boost to map it correctly on the stock block. But I can tell you that this turbo means business! Hearing it spool at that psi was insane. Cant wait to see what it can do with a proper engine and tune.

You could go to the 6766 but I still think that you will be happy with the amount of boost and near zero lag from the 6266. Throwing a huge turbo on a low compression engine isn't going to be very fun on the streets. That's why I am building mine with 11:1 cr but I am on E85. I don't see a reason you would need more than 21 lbs anyway. Unless time slips are your number one goal.

Back up the truck! I clearly remember having a Sunday morning conversation with you about this issue and how you should have plumbed the WGs. It was post-tune so maybe your comment is prior to tuning and then maybe you did get some bad advice.

You told me that your MBC failed and you just removed it and plumbed the two lines together. That action basically welded your WGs shut because you were adding equal pressure holding them closed as you were adding to open them.

Also, I am tuning at 5,500 ft which does affect the turbo spool. So if I was at sea level that 21 could have been closer to 25.

Here is a quick write up on this.

Boost and High Elevation question.

I hope you don't think I was coming of wrong. I wasn't trying to. but the reason I don't think it was maxed it never fell off..maybe ur waste just opened at 20 cuz it held right there till the end of your run...and that was a stock wtf...lol..

Jwick,

When I spoke to you, you had advised me to hook it up the same way everyone else had. Even my tuner during the dyno and the 4 guys that worked at the shop said that the way it was, was correct. So we had all assumed that the MBC was bad. I eventually figured out you leave both top ends open, T into the bottom and into the MBC. I proved this out on the street when I was able to adjust it around 2 psi over spring pressure.

By removing the MBC I was then just running off of WG spring pressure.

Absolutely not man. I was just simply stating the condition of my pull. Like I said, it could have raised with a proper full pull. I was only able to pull into the high 4K range. Plus my injectors were at 110% duty cycle...LOl.. Amazed it held together even at that low rpm's. It may have been still climbing in psi and im sure it could have hit 2 to 3 more. The graph is what it is. I looked at it as kind of plateauing around that 20 range though. Maybe im looking at it wrong.

Not true. I told you how to hook up a typical MBC with the caveat that you needed to research the requirements of your specific one because I was not familiar with it.

When you removed the MBC you told me that you plumbed those two lines off the controller together and continued the tuning session. That is definitely not running off WG pressure. I really wish I still had the diagram you sent me.

Don't take shots at people trying to help you when you didn't do the research you needed to get it right. :ugh:

Sorry OP for the thread jack :tiphat:

Chill out man. When exactly in this thread did I "take a shot at you". I said "everybody and their dog" and not, "Jwick and everybody else". Then you chimed in defending yourself, whom I didn't even mention, putting yourself in the spotlight.

Yeah I totally threw your name under the bus here. :wtf2:

:drama:

Subd..

The twin setup I'm building next well be what enends up on my car someday..I think the 6266 should be more than enough...I think if I can get high 6 to low 700 the z will be point less so that what I'm shooting for...lol...but my number one goal is busting *** on high dollar cars its what I love idk y but I love to say I have less 30k in my car and I just walked you. ..plus the z will never do what my talon will do on the strip so I'm not going to try...I like to slide....

Agreed. After reading this thread, they're no reason for 600+whp for street use.

12 PSI tune on OEM engine is a protenial low 11's 1/4 mile car all day long.

IMO i'm happy with 8 PSI with 450ishwhp. Can do a John Force in 3 gears, or 1.6 60ft with good tires(and great driver).

Just don't see the point in building a engine other then appying some where other then the street. (Not implying street racing for $$$ just normal use fyi)

I cant wait to see how this project turns out!
Please log your boost curve upon completion of dyno. I mean, that is after all the number 1 reason to make it twins vs. single right?

Yup I have 370whp and I'm running out of traction need to get better tires. 500+ whp is pretty useless on these cars unless you want to go a bazillion mph.

I have tons and tons of info on all the work I do...but I will for sure....as far as traction goes I was putting down 500 whp and didn't have a problem with traction out side of first and tires warm..and that's on stock 2014 rays