This is the very reason I decided that I would get a custom tune using ECUTEK with the A2A kit. Which I need ASAP, hint, hint!

I find this odd. Here are zmanelite's Dyno numbers from the install.

RunFile_008 was with the Invidia Cat-Back he came in with.
RunFile_012/018 was with the STILLEN Exhaust.
https://blog.stillen.com/wp-content/...5/AVILAHP2.jpg

https://blog.stillen.com/wp-content/...05/AVILATQ.jpg

I do realize we did not return your stock intake manifold and injectors. There has been a fair amount of remodeling and reorganizing in the shop over the past year and it is our fault for not getting those back to you.

Is it possible that something in the tune didn't stick? Maybe. Were there new parts added since the last tune? We haven't seen this car in quite a while. There is obviously something wrong (your AFR is flat lined rich), but what caused it is the better question because it didn't look like that when it left.

Nothing new added , and only 300 + miles since you guys touched it
Only thing I got back was Invidia cat back and Injen intakes


Not looking for anything from you guys as I'm done with lack of communication and bad customer service
I do find it funny that as soon as anything bad is said , you guy pop up in a hurry


I'll just spend my money elsewhere

probably just was crazy rich, On mine "not their QUOTE updated tune" I was @ 9 PSI and was only making 324 WHP :/..

Custom tune I finished @ 412WHP same PSI of course

We actually respond to many things in social media and forums. Good, bad, questions, etc. You can check post history to verify.

Our customer service for quite a while has needed improvement and revamping. It is something we have been working.

Fuel system held up fine, no issues.

half way through the tune, my HALTECH sensor **** out :(

Ive ordered one, should be here today, finishing the tune on the 24th. soonest I could get in.

But we know the fuel will hold, I made 10.8 psi, put down 458 WHP and 366 WTQ.

Theres more power to be made, I was in the 10.2-10.8AFR.

Ive found your company has really stepped it up, I get a weekly call from your rep, seeing if my company needs anything. I can tell you guys are turning it around, kudos!

So there you have it guys. Around 11psi you can reach 460whp/370wtq on 91 pump using stillens fuel delivery. Thanks Evo!

So if you went with an upgraded fuel system and ran E85 you can hit 500whp/400wtq on 11psi all day. SAFELY!

Question is...Who doesnt have access to E85 but wants to run a meth setup? This would give similar results to E85. Looking in the Fast Intentions thread they are doing this on the SOHO 370z and making awesome power off pump gas.

At least to me, you guys are doing a better job with customer service than with some other companies I've been dealing with.

Just a quick edit, I was running PetroCanada 94 octane, not 91.

Stuck a Go Pro in the bay near the gauge and here's some footage:

https://youtu.be/RdR0WY3-J6g

Looks like I'm not getting enough fuel because of ______________

Ill fill in the blank "too much air" :tup:

Wait? are you on stock pulleys?

Hows it not getting enough fuel??

What am I missing here?

9psi pulley. Sebastian is telling me something is wrong with my fuel return and that my pump is fine.

I'm going to have to have my shop take a look at it next weekend or so. I'm probably just going to upgrade to the new CJM S1 kit with a Walbro 450 and call it a day.

What pump is in it now ? I have the S1 with the 255 and it doesn't do that.


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Update: Seb said my fuel pressure regulator is set too high which would contribute to running so rich. He also said that my engine loads are too low which leads him to believe there is a boost leak and probably after the MAFs. My question is...If there was a leak in the manifold there would be a vacuum leak wouldn't there? I'm reading 7 psi on the 8 psi pulley.

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Yes it would, I had a hose coming off the back of the manifold crack at the T and the car started acting strange. The rpm was all over the place at a stop light.


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That's what I thought. So there is no way that I have a leak after the mafs cause the car idles fine.

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I have the S1 with the 340 Aero. Runs perfectly fine until I hit 6500+ rpms.

I have the S1 and 340 Aeromotive. My problem is too much fuel right now. I think your problem is your regulator or pump assembly wasn't modified correctly.

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Sounds like you are out running the fuel system but you shouldn't be.


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I have the S1-S and Aero Stealth 340 and mine doesn't cut out. I agree with PaulyZ that it has to be something else that maybe wasn't installed properly. No reason that setup should be struggling.

I am seriously considering going to the 9lb pulley now before I get the car tuned with the A2A setup. I looked on the Stillen website and could not find it. Where did you guys get yours and what is the diameter? Can I get this straight from Vortec or does the pulley go on the jackshaft drive that Stillen supplies?

Thanks in advance!

Hey TBatt. You can also consider changing the vortech pullies on the supercharger side instead. The majority of the slip occurs on the serpentine side. I proved this out on the dyno with some belt grip dressing. The 8psi pulley is not only bigger but it is blasted so it grips better and has better belt wrap. Also, a vortech pulley is $90 where the 9psi stillen pulley sells for $200.

Just food for thought.

So how do we prevent serpentine belt slip? It does seem that my tensioner is a little weak.

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Is this what you are referring too?

http://www.the370z.com/forced-induct...r-pulleys.html


8-Rib High-Traction Supercharger Pulleys | Vortech Superchargers

If so what size is for 9Lb?

You can only order the 9psi one from Stillen directly. It is a 2.75" pulley.

You can also order it from Vortech or 928 motorsports.

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Ok, is this the jackshaft pulley or the SC pulley? Vortec has pulleys too.

I don't want to deal with Stillen for this. I would prefer to get the parts from Vortec. I just want to be sure I get the correct one.

I just called Vortech and they were no help. They only supply the SC and Stillen supplies the pulleys.

So, it looks like if I measure the diameter of the stock pulley on the SC and then go to the next size down in diameter I should be at the 9lb level, correct?

The 9lb pulley has been measured and is 2.75. Vortech sells pulleys, they are on their website. The second you mention stillen, they will refer you to them.

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Thats the first time i have heard of Vortech not being helpful. Their customer service is da bomb.

Both the jackshaft pulley and supercharger pulley are 3.20"'s. You need a pulley that spins the supercharger to 56K. So a 2.80" on the supercharger will spin it to 55,600 which is 1,000 less than the 9psi stillen pulley.

HOWEVER, i cant remember if that combination will allow the belt to be tensioned properly. It might run out of room to crank up to get the belt tight enough. Can someone chime in here?

PS However, you can get a 3.4" jackshaft pulley and a 3.0" supercharger pulley and it keeps the exact same tension and will spin it at 55,150. If you want to spin it harder a 2.9" would fit and spin it to 57K. Buying two vortech pulleys is the same cost as buying one stillen pulley and it will grab better this way.

If you really want to do this I have a way. I was going to get into this but ran out of fuel so put it on hold because my life is chaotic right now..lol..

Buy a steel 2" pulley and put it inbetween the stillen pulley and the idler pulley on the face of the plate. THere is already a machined and tapped hole in there for it. You would then need to find about a 6" longer belt. This would get more than twice the wrap around the stillen pulley and grip like a mofo.

Do it! :happydance:

Definitely look in to this. Thanks!

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I'm on the 2.8 supercharger pulley but went to a 2" tensioner pulley, the part number in in the big thread somewhere. It could work with the stillen one but I didn't try.

That is the info I was needing. Thanks!

Time to go spend more $$. Builds would be a lot more fun if they didn't cost so much.........

Me, Willis and Topz all did some modding on the charger side.

I had a new tensioner bracket made, 3" idler pulley. 2.75" on blower, stock Jack and stock serp side.

Ill see if I can find it.

I had a new tensioner bracket made, 3" idler pulley, 3.0" blower, stock jack and custom 2.90" serp side..lol..

With changing the idler pulley size, is there a need for a new tensioner btacket?

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Nope. It just takes up more space to run a smaller pulley setup. We upgraded our brackets cuz we were worried about flex