The new blowers on these LSJ engines are built with extremely tight tolerances. So tight that with excessive boost/heat, they blower rotors can actually seize against the blower housing.

We haven't yet seen or reached this point in our testing, but we are being warned in advance (by people who know) that anything at or above 18 psi of boost is definitely in the danger zone.

Anyone who goes below the 2.80" supercharger pulley size needs to understand that this is a serious risk. Rest assured that we're already working on solutions to this issue though...

 

thanks for the info....i guess your 2.8 pulley i have on my car is all i can do for awhile till you guys come up with somthing else for me....

 

Although with an eaton blower, adding certain mods reduces psi. So when someone reaches a 2.8 pulley with the mods you have, adding a header, ported heads, etc will lower boost allowing you to run a smaller pulley.

 

We need a blower upgrade ...

 

HA HA! this is were the head work will come in!

......hmmmm so maybe it wasent such a waste

ALSO!

what about a water injection kit that sprays before the blower? the water on the vaines in the blower may kill some of the heat?

maybe so, maybe not?

 

although Rob swears by it, there was a huge alky/meth injection craze in the GP community at one point, but no one ever got good results..... besides Rob. People were running small pulleys on little mods, but no one ever got faster. The turbo guys had some luck with it, but not the SC's.

 

Im going with GM kit so im in the safe zone. No more mods after that.

 

Anything from the stock 85 mm. all the way down to our Stage 3 2.80" supercharger pulley size should keep you below the 18 psi threshold.

 

ive been runing alky injection for a while on my cav , and with the position of my IAT it reads the temp after the blower , and with the alky injection im able to make alot of passes in short time , with out the s/c getting heat soaked

and the M45 that is on my 2.4 is on the small side , so it builds heat quickly

 

its mainly the rpms that will cause the most amount of heat which will ruin the s/c the fastest. with having the s/c at the high rpms for a longer than just a couple seconds will cause the s/c to heat up the bearings and the rest of the internals and cause it to impulge (sp). have 18 lbs of boost at lower rpms will not harm it as much, from what i have been told. Its keeping the s.c at the 14,000 rpm continous max that will make the s/c burn up :p ........... thats what i was told

 

I think it's a combination of the CONTINUOUS operation with all these parameters : High speed (past 14 000 RPM's), too much boost and too much heat !

 

BINGO!!!!

 

well **** at least i was right about something today

 

Thanks for the plug

I run a 2.6" pulley(18psi), 24deg timing on my Impala, NO IC, and i use water injection. Right now, since the wife now drives it, 3" pulley (13psi boost), 17deg timing, 87octane NO KR! ONly because of WI!!!

It works, if it didn't, we would have lost WW2 do to all our airplanes overheating and crashing!

 

on what car do you have that 3" pulley? what s/c is it?

 

04 Impala SS on a M90 s/c

 

im just saying that no one has duplicated your success. MANY people have had injection but it never worked out for them....

 

There were a few that tried it on their Red Lines with no success. I think most have taken it off the car.

 

There are 2 major keys that all who have failed did NOT have.

1) Tuner software + knowledge on how to use it

2) A good PWM, computer controlled WI controller

I have been using WI for 2 years now with great success do to those 2 items

Anything less will result in frustration and failure. Just ask my racing partner who tried to go budget an built his own

 

I hope that whipple or kenne bell make an upgrade in the near future because we are so limited with the m62!

 

I don't see kenne bell making one for our cars first. Considering virtually all of their s/c's are for V8's, and depending on where you draw the line, none of them are for sport/compacts.

BUT, i think that the whipple W200AX is roughly a similar physical size and they have a million different snout kits. It is a matter of time before a vendor gets one and starts expermenting with snouts, intercooler adapter plates, and throttle plates. Hint, hint

BTW, I lurk on this forum alot, but I am a pretty heavy poster on redlineforums.

 

?????? That statement makes no sense! We do fine with the 3800 and a smaller blower per cuin displacement!

You guys will soon see, it's PLENTY of blower!