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109 3/8"
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**Disclaimer** they don't make a 7 rib belt in this size. They go up to roughly 107" then jump to 113". I tried both. They didn't work. 6 rib belts come in any size. So that's what I'm using for now. It works just fine minus the 1 rib and have more traction with the extra pulley. You just have to be extremely careful to make sure the belt is riding on the same ribs of every pulley.
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"Gates Serpentine Belt-racing Micro-v High Performance V-ribbed Belt " Their belt design has a shallower rib so it doesn't bottom out on the valley of the pulley [substantially minimizing/eliminating belt slip at that point] but rides on the side walls of the V for more efficient belt/pulley contact surface http://www.gatesracing.com/ I think they are available in a number of lengths and # of ribs, but you'll have to contact them via their on-line 'Contact Us' form to find out for you application. You can always [carefully] trim down to the max # ribs your pulley is designed for with a sharp box cutter. You've gone this far - that extra rib just might do you righteous. By the way ... real nice install :-) |
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This is the Gates belt chart for the dimensions we need. They don't have the length that is required. I appreciate the help though. I'm still looking. Sent from my SM-N920V using Tapatalk |
The highlighted one is the stock supercharger serpentine belt size.
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I'd still contact them with your specs and see what they can do for you...
Ask them about the Racing Belts - they might be different from the stock sizes. Can't hurt but sure might help ... Have FUN with your 'NEW' Car :-) |
I just loaded my first tune from Seb. Holy crap, what a difference!!!!!!! Runs and drives smooth as stock now. As soon as I wipe this silly grin off my face I'll start getting some logs done for him. Wow! I just can't get over the difference! Throttle response is OMG. I will have to relearn how to drive my Z.
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That's really cool man, Roll Tide!!!!! Btw I ran into jake joker at pirates cove last weekend.
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As I am patiently waiting for my air to air kit to ship out my slave cylinder decided to go out yesterday... most excellent ted. So I bought the z1 elimination kit, although I am not too confident on pulling the tranny out so I get to wait a few more weeks before the mechanic can get to it... then it's air time!
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I also would like to point out that even though you have a 6 rib belt vs. 7 you are still getting like 85% more grip. 6 ribs vs 7 = 15% less.... 2" of wrap vs now 4" = 100% more. 85/100 = 85% more grip!! Do you plan on doing any tests to see how much psi you gain from it? Did you have a solid baseline before the install? It wouldnt be too hard to throw the old belt on and just bypass this if you didnt. |
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And if anyone is thinking "what about cog belts on the supercharger side". DO NOT TRY THIS. I went through 2 belts and 2 weeks of headaches. It will never be reliable enough to run. The setup back there just wont allow the clearances you need. The extra pulley is where we really need to put the grip down anyway. However, i will say the sound that came out of the cog setup was very intoxicating to say the least. Reminded me of my old positive displacement eaton blower on my 350Z. Wish i could have gotten it to work. |
I'm scheduled for a dyno run August 6th at Z1. The car is running great and Seb should be giving me the go ahead for some WOT runs soon. New wheels and tires are on. Pictures will be posted on my build thread. BOOST, FINALLY!
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Is this part of the a2a kit or did you eliminate the piping and install intake on the blower yourself? |
The larger intake is part of the A2A kit. It replaces the y-pipe dual intake design that the stillen kit comes with.
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:tup: Ok cool so it's part of the kit
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Yeah that y pipe intake is lame! Has to have a shield so as to not get too turbulent of air on the MAF's. Great place for wasps to make their nests and blocks half of my oil cooler!
when I cleaned out that intake it was wasp genocide, those little dudes got sucked to death and were mashed all up around the filters. |
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Second - Will it also work for my 2010 G37S 6MT Stillen SC? |
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The other guy is Milkcow500 here on the forum. He made +50wtq over his water setup but needs to find a DynoJet to get standard numbers. His install was a bit confusing as they put the brackets on incorrect and then modified one to fit instead of flipping it around and to the front. Im sure he will chime in and elaborate on this if you need some more info. Here is a pic of it installed on a G. Also. I have updated the original post with pictures of the kit. http://i1070.photobucket.com/albums/...psuqvszgkp.jpg |
That sure looks pretty!:icon18:
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Can't wait to get mine!
TopGunz- the 500whp you mentioned by a member, was that on a stock motor? Did it have 9lb pulley and/or impeller upgrade? Contemplating if it's worth to upgrade the pulley/injectors or to just simply add the a2a. (Cost vs gains) I'm making 449whp now w/9lb pulley. |
His name on here is Allenwang. You can try to contact him. No built motor but I think he has an upgraded impeller. Either way, there are so many scary stories popping up of what kind of harm the 9psi pulley is doing to motors with the water kit that I would never run that thing.
A local guy here in the twin cities just had major problems with it and is installing my kit once it's cleaned up. Ever wondered why a huge R & D company like stillen voids the 36k warranty on the motor AND the kit if you opt for the 9psi pulley? |
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Yeah I gotcha man, I haven't been driving mine since putting the pulley on and learning all the issues. I'm awaiting ordering your kit when it's available so I can confidently start driving my car again! |
Well the last two kits of the 2nd batch have sold. SlyZguy just picked up the last one.
Who else is interested in one? Should I get a 3rd batch going soon? |
Does this upgrade kit require changing to Ecuteck tuning software and adding MAP sensors?
I'm trying to get a sense of total overall costs with my setup. Already have 1000cc injectors and 340lph fuel pump. On the fence about going E85 and adding RFS. What's the gas mileage per full tank are you guys with E85 getting on average? |
No, this fixes the MAF sensor issue, so you can run Uprev if you'd like to. I'm running a hybrid EcuTek tune that utilizes both sensors.
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If you have easy access to E85, then that would be your best bet honestly. I'm assuming you'll just have to gas up more frequently, but the overall price shouldn't be too different.
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Well the good news is that if you stay with 91oct then you wont need a rfs. The only reason a rfs is needed is when you need to pump 30% more fuel due to E85's consumption.
Regarding the MAF's and tuning with Uprev... The stock MAF's should work fine with the 8 or 9psi pulley. However, if you upgrade your supercharger to the Si trim and start pushing a lot more air over that then they can be maxed out before redline. MAF's are strange. I had a long conversation with Sebs from Z1 motorsports about this (you know, the guy tuning most of these cars) and he said that they are a bit unpredictable. One car can max out voltage 1000rpm's earlier or later than the next on just about every kit he has seen on the market. Again. I dont see this becoming an issue until you are maxing out the kit. And then heck, might as well get EcuTek if your trying to squeeze every last pony out of the car. We have seen it can pull out a good bit more over Uprev tuning. The MAP sensor is pretty cheap anyway. |
If Seb is tuning the car he has MAPs he will sell you.
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For the guys getting tuned on speed density; works best when its a hybrid tune using the (stock) MAFS when out of boost, then a 4bar map sensor and speed density when in boost. Full speed density ( no MAFs at all) can be kind of jumpy between weather changes
This is all based on a turbo car but I'm sure its the same for you supercharged folks. |
That is what Seb does with all the cars he tunes with MAP. The "hybrid" version.
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All good info to know.
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Or you can always upgrade the MAF's. They typically sell a set for $700 new and $500 or under used.
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