Well as it turns out my guage watching was spot on. I ran the thing to 6500 rpm's and never went above 12.2 but mainly stayed in the 11's after boost kicked in. This is without a booster pump, FMU or anything, just a reflash and larger injectors, I for one am damn impressed and thankful to these guys in Torrance for their amazing programming. My EGT guage never even went off at 9 PSI set at 8.25 C X 10.

Crap can someone host a text file? When I reduce the print out to 640x480 you can't read it and I am having website issue. Or I will work on it later I have a friggen head ache.

Long story short it goes from 11.2 to 12.2 under WOT above 4k rpm's

It never goes above 12.2 under heavy load in open loop even at 9 PSI and 6500 rpm's.

I saw 391 HP before it snapped my compressor belt for the second time. Remember the last time I was at 7 PSI and nailed it WOT from a redlight and snapped the belt? Same friggen one man, this is 6 belts total, 2 Serpantine, 2 Cog and now 2 compressor and I am happy about my A/F and power and very UNHAPPY about my belts and these cheap azz pulleys.

 

Below,

Follow the red line that shows *all* of the teeth missing then continue to where the teth begin and notice they too are being cut at the top like a knife thus weekening the belt. Then look at the pulley. It is not only silver, lost the paint (normal) but is actually gouged into a razor sharge edge in 2 or 3 places.

at 350+ RWHP it started kicking up belt teeth at us one by one and then it was shut down, the Operator said it read 391RWHP and 8.5 PSI (it was starting to lose pressure because of the belt) now it is a 5k cold air kit again Napa didn't stock the belt and once again I call ATI. Is this fun? Hell no.

 

test

Is this readable?

 

Tere was right too, after 6200 there wasn't much gain unless it is because my belt was going and slipping causing less boost. I hate Dyno's they are cursed. E

 

Yikes! You are scaring the F out of me with your history of broken belts. I was hoping this kit could be a good care free daily driver's kit. Do you think the belts are breaking because of the different pulley combos? What good is a turbine that can spool 80krpms and 30psi if it cant keep its belts entact!

 

I've never had any problems with my belts. Of course I don't run the hell out of my car like Max does! I also don't have the 9 lbs pulley either. Are you sure your pulleys are aligned right Max? Didn't you say you were seeing some belt wobble before? When I look at mine it is like staring at a perfectly straight line, no wobble at all.

 

Sorry I am just being honest. The serpantine issue was resolved, it was a warped pulley, possibly the Installers fault for not installing it with thread lock and the back bolt walking out. It was red heavy duty thread loacked and torqued and was never issue again.

The Pulley Cog Belt) facing car is where the pulley's were changed. I attribute this breakage to using pulleys that were too big and or hit my radiaotr shoroud or a bolt so they rubbed.

Since obtaning a clear path for this belt it has never been an issue again even to LA and back.

Now this compressor belt though is a different story. It has never been changed or removed, it is a #22 as is all of our compressor pulley's. It is on tight, turns freely and why it has gone through two belts I do not know the answer.

If the belts can't retain the power the kit is worthless.

Hopefully ATI will have some answers for me tomorow , they are 3 hours ahead of me and I didn't make it home in time. Obviuosly I need a new pulley and belt, one thing after another.

On the brighter side I didn't go there to make a top ten Dyno list I wanted to confirm my A/F #'s and they are really good and so I feel safe that I can trust my EGT and Tadishi's programming.

I made 391RWHP in 4th gear and in 3rd gear SAE corrected I made 315RWHP at 6k rpm's and he was not doing the Dyno right. I am not going back to this guy, he doesn't know what he is doing. It is obviuos. They also have some wierd filter that comes out to be cleaned that water goes to or something and they always blame their miss shifts on a "dirt filter."

?????

 

A/F Chart for my 2nd run before belt failure.

I feel safe to track at least now, my primary concern was my A/F ratio's. As soon as I get a new pulley and belt I am track bound.

Where are people getting their COG Belts NAPA's wherehouse didn't even list it?

Here is a high RPM 3rd gear pull A/F Chart up to 6700 rpm's

 

Hey Bonz thanks for joining. Yeah I had belt wobble and even posted a video of it. That was the #41 pulley facing the bracket it is on the big cog belt. I fixed that and that belt has never broke again, that pulley was warped. The front Cog Belt runs very true now and has a smaller pulley a number 38.

Look at the pic, it is the smaller Cog Belt on the firewall side that just turns with the compressor it doesn't have anything to do with the boost pulleys it just spins around and the pulleys don't need to be changed. It is a small belt. I will get a better pic tommrow in the day time.

 

Does this pic make more sense?
Teeth are completly gone up to where you can see them being cut off slowly then the teeth continue, IOW where the red arc is the belt is BALD (no more teeth, they flew off.)

This too shall pass, still happy about my A/F though which is really why I went.

 

OT here, but what injectors did you go with Max?




DOH! Just looked at your sig and your thread title (PE's) What size are they (cc's).

 

380cc's they pop right in the stock location and flow great.

 

I had the same friking problem 2 belts for me man...Getting ready to ditch the Sc and go TT Less moving parts to break...Now on the way home tonight I lost my EGT probe causing an exhaust leak on my car pipes..Sounds like a frikin honda!!!Does it ever end

 

J Man,

Do you have any idea what is causing these belts to break and was yours the compressor pulley belt (the small one) on the firewall side?

I agree this is getting to be BS. I have done everything right and now I am down to just belts tearing even with perfect timing Air and Fuel. It's not just me either Nissan has gotten calls from other Nissan Dealers around the state about the ATI Belts tearing.

I am gonna give it one more try with a new #22 pullley and belt then sell this fricken thing, it could just be another bad pulley though so for now I will give it the benefit of the doubt.

 

Can everyone read the A/F Text? Does it look about right and in spec for 9PSI, should I lower it to 8 PSI?

Here is the run that blew my belts out and broke up, the bottom run was my stock dyno of 232.

 

How do you guys tension the belts?

I don't have any supercharger experience, but I design robots that use a belt drive, and if you don't tension the belts enough they can ratchet (skip teeth) and that will F up both the belts and the pulleys. Of course, if you tension too tight you can snap the belts after they wear in a bit or damage the bearings in the pulley assemblies (but I have not yet seen an overtensioned belt wear the teeth like that in such a short time)

Looking at pulley and belt tooth wear like those pictures, it seems like maybe the belts weren't tensioned enough and started to ratchet and then the teeth broke off.

Max, at one point you were looking at using some fatty belts that were very thick. Did you ever try those out? I'm wondering if their increased thickness could contribute to the problem since they may not be as flexible as the thinner belts. Maybe they are bending too much causing the teeth to separate from the cords.

Anyhow, I hope you guys are able to find the problem. If you have any theory questions I might be able to help, but since I don't have any practical experience with S/C's I may not be of much value.

Good Luck!

-D'oh!

 

I am pretty sure the tension was right Nissan did it last, but that makes sense. I never installed the fat/thick belts for the reason you describe. They are just sitting on my desk wasted funds, I had no idea they were that thisck I ordered them site unseen.

I am going to call ATI right now, just woke up.

 

He did say it was either the tension or alignment as Doh! mentioned.

I swear it was on there straight and true.

I can't believe it chewed up a pulley!

I am getting a break from Eric, half price pulley and the belts at cost (I ordered a new front belt too just in case) but I have to resolve the issue of why my belts are snapping.

You have to tension the back differently than the front so this is something I will have to study up on and do right.

Everything will be here in 2 days as usual.

Good support, just got to fix it because my Kido's can only go so far and I think they are running out

Well, 2 more days of waiting ho hum... Then it's a 12 at the track!

Peas!

 

Max, is any of this stuff covered under ATI's warrenty or do you not have that since you went 9 psi?

 

Max- you gotta get a better image- the JPEG compression makes it look like a chicken can scribble a better graph--

send me the full file, i'll host it on my server.