italiaCLs

After having the S/C for only about 2 weeks. I am realizing that my boost is going down through sec gear. more specifically @ 2nd gear, WOT from 4k RPM and up. first gear not as much and in third all the boost is there. Yes I do know that the belt must be tightend but how tight is to tight? I have already adjusted it a few times and still the boost goes away in 2nd gear 4k and up. ill gun it and the boost will read about 6 LBS but then the boost will gradually go down to about 2lbs or so, until it hits third gear. In third gear however the boost stays pinned @ about 5-6 lbs. to me it sound like the belt is still to loose. Before I tighten it again I just want to know if I can damage anything by tightening it and Also if anyone can give me a tip on how tight to tension the belt. Thank you all.

NSX-Tuner

As per Shad at CompTech...

Twist the belt to test for tightness between you fingers. Any more than a 90 degree twist is too loose, any less than a 45 degree twist is too tight.

Smitty

24 ft/lbs

Smitty

and your problem is common.... everyone who put on a S/C should retighten the belt after 300 miles.

italiaCLs

wow. thanks a lot guys. great advice as well as a peace of mind.

italiaCLs

well I tightend it much more then I was doing and all the boost came back. but then shortly after it started to slip away again. I probably just need to tighten it a lot more then I thought.

mrsteve

iTrader: (1)

DO NOT OVER TIGHTEN!

Cruz_msl

sounds like rubber bands for belts

italiaCLs

alrady happend to me. But in my case is was the bearing that seazed in the tension pulley. I had a alluminum tension pulley made and its working out ok. first of its kind im sure. so now ill know that that particular pulley will not melt anymore.

mrsteve

iTrader: (1)

The belt shouldn't feel any tighter than your other two belts.

italiaCLs

Ok. Gotchya. I was thinking that but wasn't sure. So as long as the belt is about as tight as the other belt on the HBP then I should be alright. That is a great way to gauge it. Thanks MrSteve.

Smitty

I told you that last week......

mrsteve

iTrader: (1)

Just spreading the Good News.

darrinb

how often do u guys tighten em up??

mrsteve

iTrader: (1)

I haven't touched mine since the last time it was installed.

NSX-Tuner

I haven't had to re-tighten mine for over 23k miles. I just check it's tightness every other fuel stop. I also check the belt for wear on the grooves.

mrsteve

iTrader: (1)

I'm running a slightly larger belt so it took us a while to get it dialed in to the correct tension, I think we've got it this time though.