Good to know and duly noted.

I will put a ported lower manifold on my list xD
At least for the Ported lowers, not the TB's..haha

Definitely good to know. Reason I ask is because I want to do bolt ons until I pay the car off and want to have the majority of the mods compatible with the supercharged setup 👍

Anyone know where the location of the Omni 4 Bar Sensor would go when installing it?
My mechanic is asking and he isn't sure, and neither am I.

Anyone can help with this?

Also where would a fresh pair of o2 sensors go? Is it the top or bottom of the exhaust?
If it's the top it would mean we have to remove the entire exhaust...if it's the bottom then it would mean it's easy as pie.

Please and thank you for responses!

It replaces the old MAP sensor your car already has.

Swap them into the down pipes. Hopefully, test pipes and not cats.

Thanks Topz.
We are extremely close.
And yea I did a typo I meant to say that the other option was to use the stock 370z reservoir and put that back in stock location which is what we did lol

Skip a ported upper (replaced by the Stillen manifold), but a ported lower (I went Z1), decent headers (I still have stock exhaust manifolds), test pipes (or good high flow cats) (I went Z1 test pipes) and a solid catback (I went with Borla for the sound) would be good mods for both NA and boosted. Again, TBs are a relative unknown, so if someone wants to chime in about gains from the 70mm TBs over stock, please do!

Hold off on fuel mods and things like that since you'll have everything apart anyways for the build and its convenient to knock those out with the SC build.

Well, crap. Been doing WOT pulls and making 5-6 PSI on my first WOT. Did second log, then popped hood to inspect for belt slip (I do have tbatt kit but not installed). Quickly see a problem—first belt casualty. Does that look normal or do you think the pulley migrated causing the snap? Perhaps that rectangular locking key was forgotten to be installed? And if so and i can’t find it is that anything i can come up with?
Will plan to replace belt and inspect perhaps change to tbatt kit on wed or thurs when i get time off and wire ethanol content to ECU

Did the bolt come out of your sc pulley?

Either that, or never installed. Now that i’m ordering a belt (and i think i found the part i need 8-Rib Vortech Drive Pulley Retainer Assembly 8-Rib Vortech Drive Pulley Retainer Assembly [V8R101-002] - $10.99 : SuperchargersOnline, Worlds largest Supercharger Resource. Get Serious About Power ) i’m very tempted to just go to the 9lb pulley, is this what i want? http://www.superchargersonline.com/i...oducts_id=6830 And also, what again was the 7 rib 2.85” pulley for again? Still have that sitting around.
Time to review my tbatt kit parts

Here is the 9lb pulley that you want, it goes on the serpentine side.

https://conceptzperformance.com/stil...13_p_19055.php

The 2.85 pulley is an upgraded pulley for the sc. Also, if you install the 2.85 sc pulley you'll need to install a 3.00" idler pulley to take up belt slack.

Whoa. I can see the bolt sitting there! Did you seat that pulley all the way on? You don't remember installing the key?

Oh, I remembered (to remind the mechanic about it) and make sure it was taped to the pulley. Local guy recommended using loctite as he’s had them loosen/come out before so can’t be for sure. Have new belt and retainer key on order, and will put on tbatt’s setup while at it.
Luckily i don’t see any oil leaks. Looking at the orientation of the pulley i could see how that could pull on and maybe bend the shaft or seal. I think that may have been what happened to the used blower i got. Also I don’t think the bolt on the far right (what i assume you see is from the pulley—that one is on. Probably the bolt that the old intake bolted on to.

Ok. Send me a pic of it when it is deemed "ready to start". I want to make sure you have it lined up properly.

Z1 shows 7whp/7wtq on the EPS 70mm set, but that's NA

Does this SC kit allow the stock engine located body brace of the nismo models remain oem...

Are you talking about the crash/tow bar? That will need to come off and can either be modded or you can put the Fast Intentions one on.

What size 8 rib pulley do these come with? And I assume we go smaller on the serpentine supercharger side rather than the 8 rib for higher boost due to belt tension issues? I was looking at 928 and they sell these sur-grip pulleys. Anyone running them and think they're any good? https://928motorsports.com/parts/8ribpulley.php The tbatt kit addresses slippage on the serpentine side but wasn't sure if slippage is an issue on the input side since my issue was not due to belt slippage in particular. And this kit already has the impeller upgrade, correct? Or is it just upgraded Si bell housing?

I can answer a couple of your questions. I've got bad belt slippage on the jackshaft pulley, sc side and I do have a sur grip pulley to put on it when my sc comes back from 928. My sc pulley is a high traction from vortech and I had no belt slippage on that one. The 928 pulley is really gritty, I can't imagine I'll have any slippage with it.

Topgunz's kit comes with the v3 Si supercharger, it has the Si impeller which is an upgrade from the Sci.

"I've got bad balt slippage"--says the guy making 12 and a half PSI and nearly 600whp?:gtfo2:

Downsides I've heard about the sur-grip is belt dust getting on intake filter, and replacing belts more. I think for the time being I'll go with standard until I decide I have bad slippage as well. Will be excited to see your new setup and what you do with the intake.

But if I wasn't getting belt slippage and boost wasn't dropping off completely at 6900rpm, maybe I could have hit 600. :rofl2:

My belt is wearing pretty quickly as is with the belt slippage. We'll see how it holds up with the sur-grip.

Hopefully I'll have some updates on the other things we're working on in the next couple of weeks.

Well you have me convinced that I need that now too. Better to have the car tuned with it on and hopefully not slipping at 6900RPM than decide later on I need it. Your numbers/figures still blow my mind. And you just have the 9lb pulley? Stock topgunz crank pulley and input pulley? My final test for this car would be an extended road trip because to pass the final test it needs to prove itself to be moderately reliable. A trip from Denver-Utah-SoCal and back up (maybe through AZ) would fit the bill and we should cruise GMR someday

For the little bit of money you spend, you have peace of mind. I have the 9lb pulley and the 2.85 sc pulley. There is no reason for the car to not be reliable, it drives like a stock car. It drives just as good slow as it does fast. As long as you've got a good tune, I don't see why there sould be any concern.

I did Baldy rd. on my bicycle and when I got to the village I cut over to grr and then down to gmr. I saw two cars total on grr and gmr. It was during the week. Would have been a blast in my car. Do you know gmr well?

What size is on the input shaft 8rib pulley on this kit? I measured it looks close to 3.25” but 928 sells both that and a 3.15” so well within margin of error of my measurement, and how small can we go? Are you calling the 8rib pulley the SC pulley and going for 2.85”?I imagine the limiting factor when you get too small of a pulley there you can no longer achieve proper tension with the tensioner. And since people usually go to a smaller SC pulley with a larger idler instead, does that mean this stock pulley is already nearly at tension limit being as small as can without issue?

GMR was our 7am stomping ground, we were the longboarders there early morning before it got too busy/cops. Ventured over to baldy for a bit just to even attempt it and that’s about all i could do such a steep road into hairpins

No, they go to a larger idler, not smaller. The larger idler takes up the slack.

Input shaft? Are you talking about the jackshaft on the sc side? If so, stock size is a 3.20. I got the 3.25 from 928 . The problem with changing the jackshaft pulley is that the stock one isn't a vortech style and has a different offset so if you put a vortech style (vortech or 928) then you need to add a spacer to the sc shaft in order to bring that pulley out far enough for the jackshaft and sc pulleys to line up. 928 makes a slotted spacer just for that purpose. The actual pulley on the sc I changed to a 2.85. I also had to change the idler pulley to a 3.00 in order to take up the belt slack.

That must have been a rush longboarding those roads. I couldn't even imagine doing Baldy Rd. though. It was a b!tch climbing it on my bike, there are some steep sections.

Thanks i waa going to order the spacers but thanks for the reminder would be a bummer forgetting that. Surprised you didn’t go for the 3.15” except for possible tension issues as the belt stretches.

Larger pulley on jackshaft equals more boost. The 3.15 is only a fraction smaller and the 3.25 is only a fraction bigger but I wanted to error on the bigger side.

Has to be the opposite, less input RPMs. The other 8-rib opposite of the serp belt SC pulley would get more boost by being bigger. But less belt slip at least with 3.25”. I assume that 3.20” is special order?

I believe it's just the opposite. The 9lb (2.75) pulley which is the jackshaft pulley on the serpentine side is smaller than the 8lb (3.12) pulley. If you look at the signature of "stillenz84", post at the top of the page, he's running a 9lb (which would be the jackshaft on the serpentine side), a 2.85 sc pulley and a 3.47 jackshaft (that would have to be the jackshaft on the supercharger side). That's how I read it anyway, I could be wrong.

http://www.the370z.com/forced-induct...grade-124.html

Getting back to the 3.20. I called Stillen and they tried telling me it was a vortech pulley. You can tell by the design of it that it looks nothing like a vortech pulley. It looks more to me like a magnuson pulley.

After reading your post again, the jackshaft pulley I was talking about is the one on the sc side (opposite the serpentine side jackshaft pulley). That's the one I'm replacing with a high traction. My serpentine side doesn't have any belt slip.

Yea I’m talking about the SC input pulley being smaller. Serpentine side jackshaft you want smaller for more boost (so 2.75” for 9lb vs the 3something” 8lb), bigger on blower side jackshaft (his is 3.47) and then small on actual input shaft (i guess he’s made 2.85” somehow work). Don’t try to duplicate his numbers though he’s pushing like 17psi on a built block. It amazes me that you’re pushing 586whp on 12psi and he’s barely to 700whp at 17psi. You’re sea level maybe Oklahoma is a couple thousand feet but still, crazy! He must have the sur-grip on his 2.85” though that sounds like it would be slip city otherwise I don’t know why more people would put on a smaller serp side jackshaft pulley with bigger idler pulley to take up slack when they could just replace the SC input pulley with a really small one. Guess i’ll order the 3.15 and go from there

Sounds like we're on the same page. I have a 3.47 jackshaft sc side that I sent into 928 for their sur-grip coating. When my car goes back into Seb I'll have him install it to see what psi it gives me. I don't want to duplicate what Evan has done but I would like to see a couple more psi. I'm not too concerned about too much boost as if one of the things we're going to try works then I'll be able to dump excess boost which I'll need to do when I switch to my 91 tune.

It took the force of god with that pulley puller and one large crescent wrench to get that pulley off. No way the shaft isn’t bent and/or pulley is scuffed beyond use. Also hear a bit of a whirl when I spin it that my buddy says he hasn’t heard in his, so no surprise but rebuild coming in addition to new pulley and shaft. Ceramic bearings and seals, wondering if ordering a new oil slinger could be cheap insurance, and wave washer. Hope i don’t miss any damage and blower starts tearing itself apart once i get it back on the road in case i miss something. Redon’s a bad influence ill probably be pushing 14psi on stock block before long too lol. Were at high elevation though so i could be ok but boom once i take a road trip to low elevation. Hope seb has some magic up his sleeve haha

Are you doing the super vortech upgrade or just bearings and seals? Can 928 do a complete rebuild on it or does it have to be sent to vortech for that? Hope I didn't hurt your arm twisting it so hard. :rofl2: I wonder if Seb can do a low elevation tune and set it as a switchable map?

I’ll ask him about tune maybe request your low elevation if were similar but isnt our impeller already upgraded? Hope mines still good and it doesnt need replacement so hope only bearings/seals and pulleys

The Si impeller is an upgrade from the Sci. The 928 is a billet impeller and according to them it's an upgrade to both the Sci and Si.

I just swapped out my SC-side pulleys for the Vortech high-traction and the larger idler. Wasn't terribly difficult. I fashioned my own spacer out of a 3/4" x 1" x 1" steel spacer from Lowe's. The shaft is 0.785" and the required spacing is 3/8", just FYI. I cut the spacer to 3/8" and dremelled out the inner surface until it fit on snugly with a little effort. Remember, the idler pulley also needs a 3/8" spacer (or washers, since they don't spin)!!!

I bought a 3/8-24 x 2" bolt for the jackshaft and I used the old jackshaft bolt for the new SC pulley.

Also FYI, I had an old 8-rib belt lying around that I used to wrap the SC pulley while loosening the pulley bolt.

I can get pictures of the specifics, if desired.

I already have the spacer from 928, thanks for the info on it needing to be 3/8" and the bolt length, good info. I was going to use washers on the idler pulley.

i cannot believe how far you have come with this kit Topz, its been 2 years since ive been around here lol. kudos.

No kidding. THere must be an empty grave somewhere up there.

Are you still on the Stillen?

Yes i do, its been sitting for 2 years now LOL!

Im having it tuned this week. hopefully my fuel system holds, stock jack and stock serp side, 2.80" on blower with low/mid range impeller.

I like that little tensioner/pulley for the serp side belt, can you sell me that little piece? lol
i bet that baby helps with belt slippage