Vq35hr 20psi stillen blower
 

I ran a cross this today thought it was pretty interesting. Jtran motorsports built this vq35hr with stillen blower kit at 20 psi. I don't know all the other specs but if they did it to this similar kit then It shouldn't be to hard to do it to our engines.


https://www.facebook.com/jTranStudio...999379022711:0

Should be easy to do, curious to see what they did to the stillen SC to upgrade it for the 20PSI.
I am sure it will be posted on FB soon what it dynos at, but curious to see its HP/TQ output with the stillen SC (or any SC at that really).

I just saw this on facebook as well. I am interested in seeing the results too :)

they are either guessing at 20 psi or they changed a lot

Ron Bergenholtz doesn't guess, he is building the entire setup. It will be running on E85 and has some custom pulley and charger mods as well. Like them on FB and stay tuned!

I believe that Stillen manifold in the SC kit was made just for the VHR engine. So I wonder if the manifold was modified slightly to fix the HR lower intake manifold, or if they switch over to a VHR lower intake manifold and VHR rails.

We put the HR manifold on my VHR and it fit. We did it last week when I was installing my return kit.

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Don't mess with the mad scientist's mojo!

Is there a benefit going hr?

Sounds like it's on a built motor to me.

This is what stillen posted about it on FB.
"
We can't wait to see the results of this #supercharger install by Jtran Motorsports Inc!
Built 350z HR STILLEN supercharger 20 psi setup ready to drop in. This is going to be exciting!"

Did you put the HR lower and upper on, or just the upper, or just the lower?

I know the HR and VHR lowers will bolt up the heads the same.

But the bolt pattern for the upper to lower should be slightly different between HR and VHR? I think that is why people buy that motordyne M370 or whatever it is, because they oval the holes out for you before they ship it? Something like that.

This sounds like a massive build. Looking forward to the results.

I agree, I enjoy watching all of the extreme builds around here.

We just set the stillen manifold on my upper manifold to see if bolted up. Which it does. No idea on the pattern but it appeared to be the samé.

The motor is fully built with arias pistons and carrillo rods. Ill get more details on it 2marrow.

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Thanks for filling us in!

Then they changed a lot because the v3 charger stillen uses can't come close to 20 psi on an hr/vhr. Vortech even rates the unit at max boost 17psi. the si is rated at 22psi max but those are outlet pressures so it will be a couple psi lower at the manifold. They are going to have to spin it into the "danger zone" if they want to hit that pressure. the unit has a 52000rpm redline so no more than a 6.9:1 step up without risking ripping the impeller apart.

the charger is already geared 3.6 to 1 so max input pulley speed is 14,444rpm or a little less than 2:1 from a crank speed of 7500rpm.

Judging by all your post on other threads you obviously know everything about anything, so I'm not even going to waste my time going through specs, danger zones versions, etc...

Stay tuned and we will all see where it ends up after the motor is broken in.

I'll stay positive about it as I know the man building the setup personally and his race history in the industry. I wouldn't doubt him for one second!

I saw Jtran post this build on FB, and no doubt they are very good at what they do. I'm in for the results of this.

Im just saying they changed a lot not knocking the build im trying to clarify that the stillen blower isnt going to be able to push that much air as it is. Was the housing changed? Im assuming that the abec7 impellar bearings were used to be able to push it to 57k. I used to rebuild blown vortech units, so i am fairly familiar with them. Any reason why not try to fit the v4 or larger units? Just not enough space in the z? Even the abec7's and 928 impellar would have a hard time with that much air.

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Then again it is an hr so do you know if there is a set of blower friendly cams on it or are they going to tweak the cam timing to try and push the boost up?


Edit: if they are using the stillen v3 and not going over the 52k impellar redline and hit 20psi they will have been the first to get close to that boost pressure with a stillen kit.
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Well if they are doing a full engine build and claim those numbers then clearly the blower isn't just a off the shelf v3. Once o&g gives us the low down on this build then we can moan and groan on specifics.

http://img.tapatalk.com/d/14/03/29/etymyvav.jpg


Blower was sent to vortech for upgraded wheel, JTran engineered pulley, custom charger support.

Motor: carrillo top of the line steel Hbeams, arias 10.1, cosworth head gaskets, L19s, stock cams.

Its possible we wont hit 20 psí but we will come close and make gobs of power.

Motor running working on minor thing like gauges, etc....

Ill keep the updates comming!

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^I don't see 20PSI, and/or the pulley must be non-existent. And/or the crank pulley must be oversized


Why do this on a STILLEN kit? The "intercooler" won't keep up

Hence why I said custom engineered pulley. The car has an ATI dampner on it and it will be on E85.

I also said it might not hit 20 psi but I see 18 happening with the upgraded wheel and guts, over spinning will be the issue.

Also like I said, we will wait and see when the motor is broken in for results.

Why Stillen? Because that's what the customer wanted and at JTran we cater to the customers needs and wants for their platform. Sure if this was a shop build we would have done things a lot different, like put a giant turbo on it!

Either way, they are thinking outside the box and doing something different. Thinking positive > thinking negative but hey, that's what drives us over here!

You obviously know your sh*t when it comes to S/C which I can honestly say I don't. Never owned one or wanted one. I'm a turbo guy. I respect your opinion and appreciate the information.

6.78IN oulley on the ati, looks like about a 2.75in pulley for the input puts you at 18,500 rpm on the first cog pulley, is there any reduction from that pulley to the charger? thats already 4,000 input rpm over what vortech specs on the factory bearings which is roughly 14,000rpm overspeed.

This is on a 350z with an FMIC and more complex piping hitting 21psi.

600whp Vortech - MY350Z.COM Forums

I'm sure this build will do very well with great results. Jtran does great stuff. Good luck.

^Church's dyno reads a mildy modded 370Z at over 350WHP

There is a dynojet result too aw post down but regardless of that it is making 21psi which is the topic of debate

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^ exactly but someone has 2 hate or its no fun!

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Considering that a lot of us have ponied up serious money to push the limits of the VQ platform. You would think that more people would be excited, over skeptical, with pushing major power. I personally would like to know exactly what this platform is able to handle. But I guess Haters will hate.

I personally can't wait to see what Johnny and Ron do with this monster. In fact can't wait until tomorrow when I get to check it out.

being a de is going to push the presure up a lot, they don't flow all that great, the hr stock cams and timing will run a few pounds less on the same blower, and the vhr with it's tremendous overlap will run even lower, horsepower doesn't follow this as well an hr 18psi can easily make more power than a de at 21. a vhr at 12 makes more power than a de at 18. That is all uncammed of course.

Oh it's great and all but I really want someone to try and fit the v7 (apparently they will put the v4 housing on the v2 case now) with it's bigger 60k+ rpm limit and 2"larger impeller. <- if that fits it will be cool. the V7 should bolt to the v3 bracket the volute is just a little bigger or if they somehow fit a T-trim impeller on the v3

I love your profile pic but I prefer no carpet on the beaver

Haha yeah but its funny

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Ron was the 1st person in motorsports to give me a chance with cooling his drift cars.. The man is a genius with engines.. He has taught me so much, and is one person that gets my deepest discount on product no matter what..

He is the man, and I'm looking forward to hearing more about this build.

Agree with you to some extent. The vhr is a superior engine, has higher CR, bigger displacement and better VE therefore it's natural for the same compressor to create less boost in the manifold, but the net result shouldn't be dramatically different if they have a similar kit and reasonable tune. When you cram air into the engine a lot of variables in a NA engine that were important becomes less important.

Best comparison i can give you is the comparison of the GTM VQ42VHR vs my VQ41DE. Similar displacement, same CR and practically identical FI setup, however i opted for HFC and smaller exhaust for noise. The DE made 512/395@9.4psi while the VHR made 546/411@11psi. Without the HFC and smaller exhaust i made 20/10 more. As you can see practically no difference and my cams have an extreme amount of overlap. Cam phasing/timing is moot since both setup have their advantage and disadvantage. You can also lookup the vortech kit on the DE vs skillen kit on the VHR (both stock), not a dramatic amount of difference in the net result either.

As for this build, granted that they don't run into any slippage problem then i don't see why they won't be able to hit 20psi. The stillen setup as far as minimizing pressure drop is very efficient. But like someone else mentioned, the air to water might be the limiting factor for maximizing power. E85 should help though, so lets see how it goes. I would also love to see the V7 dropped in. The 370z has more room so it might be possible with not a lot of work.

thats what i mean its before cams. The vvel's "profile" is already at what hr and de race cams are at, the hr is somewhere in between the two so if the supercharger made 21psi on de stock cams, putting it on an hr means more overlap and less boost do to a bit more wasting, and a better breathing engine. You can cam any of the motors to do the same thing as a vhr, but that isn't the way they come. to really make use of a built engine the guy is going to need a T trim or v7/v4 whichever fits easier. If they get 600hp out of the modified v3 they could get 700 or 800 out of a v7

Oh and a turbo reference doesn't translate over to superchargers all that well. A turbo is much more tolerant of excessive overlap than a supercharger is.

Not sure exactly how much overlap the VHR has since i have never seen the cam spec card nor do I claim know exactly how the VVEL black magic affects the cam for that matter i'm not even sure if anyone knows for sure.

I didn't make any reference to turbos. A SC is more like an NA compared to Turbo and NA, when talking about cam profiling. The first you worry about blow thru where as the latter you worry about exhaust gas making its way back into the engine.

Sorry for the off topic conversation.

You seem to know a lot about blowers but this is a HR not a DE. Why don't we just all wait and see what magic the mad scientist and Jtran come up with

I thought we covered this was a HR build days ago...

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