Topgunz - air to air upgrade

redondoaveb

What pulleys are you going to run?

Bens98gagt

I have the 9lb stillen pulley and the 2.8 supercharger pulley with a bunch of bigger idler pulleys and Tbats system to avoid any slippage. With the 928 Super Vortech upgrade I plan to spin it much faster so I’m hoping for some really good flow. I will create a diagram of my pulley system after testing to show my final configuration. But we have allot of pulleys to test with and I will report back the best combination and configuration for this setup. I really hope to make about 17psi but i dont know it will be that high since my engine flows real nicely with a lower ported intake manifold and full Motordyne LongTube headers and cat back exhaust. I have no cats on my exhaust system. It will come down to the whole argument of flow vs PSI so all I can do at this point is test and hope for the best.

overtureZ

Should I run straight pipes with this kit (short tails and test pipes) like I currently am, or should I throw on another aftermarket axleback to create some back pressure?

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Auto/Z Enthusiast - Mechanical Engineer - Fabricator - Do it for dale

Senna-F1

I just ran across this article yesterday. It should be a sticky. You don't want back pressure, and what you have should be good if you're ok with the sound. From my research, FI and cats just don't work very well. Unless, you have BIG cats, or maybe break them in correctly, or maybe the Fast Intentions Mil Spec cats? In general though, I think most recommend no cats with any form of FI.

This explains back pressure v/s scavenging and why some incorrectly assume back pressure = more HP.

https://motordyneengineering.com/exh...nd-scavenging/

TBatt

I'm running the Fast Intentions CBE along with their resonated TP and Mil Spec cats. I am not having any issues with lost boost. I'm still getting 9psi with my setup using the Vortec 2.95 pulley and the A2A system.

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RJM pedal, Hotchkis Sway Bars, FI TDX, FOG Light, Z1 Slotted Drilled rotors, Stillen SC, Quaife ATB, Z1 Oil cooler, AEM Gauge Set, Galeforce gauge mount, Avant Garde M590 Hypersilver w/RE-11, TopgunZ A2A kit., ECUtek tuned by Seb: ROLL TIDE!

overtureZ

Dyno and Tune today with the A2A Kit! I am more than happy with the results! Thank you Jon@Z1!!

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Auto/Z Enthusiast - Mechanical Engineer - Fabricator - Do it for dale

redondoaveb

Nice job, was that on 93 octane? How are you liking the power difference?

Kamillio

Is it 9psi pulley? How much timing are running on 500whp run?


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370z

overtureZ

Yes sir, 93 pump gas. And I am loving it!

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Auto/Z Enthusiast - Mechanical Engineer - Fabricator - Do it for dale

TopgunZ

Great numbers! Awesome torque curve, hitting 300wtq around only 3000rpm and it doesn't drop till 7k...I bet she pulls hard! Is this the standard trim or Si impeller?

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ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

overtureZ

Still the stock blower, and pulleys besides Tbatts tensioner pulley.
Jon did say to hit 500+ (map2) he had to advance the timing a bit. This was still hit on nothing but 93 pump gas with stock pulleys and trim.

Not much to watch, but here is the final pull: https://youtu.be/j2gaq0vRX90

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bcfromfl

That graph is exactly why I like s/c over TT. Great job!

TopgunZ

Dang. If you would drop 1 pulley by .20" and ran si trim you would easily hit 550.

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ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

overtureZ

Oh it's coming I'll be in touch for sure on what route to take for pulley size!

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Auto/Z Enthusiast - Mechanical Engineer - Fabricator - Do it for dale

nic370

Hi guys
Is anyone experiencing a flat spot at low revs/between gear changes
I've been watching my afr and it seems to momentarily go realy rich for a second
I'm wondering if it's bov related so wanted to ask you guys knowing you are running same set up

Ps here's my dyno sheets from stock stillen kit to air to air

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