Crubel.

Also. The only thing you might want to replace down the road. Is the bearing. When you swap out the pulley. It makes tge stock one go bad faster. If you ever have it happen. Look for a full ceramic bearing.

 

I tuned a local 9.5-10.5 PSI S/C tC with 550s and I had to run an AFR of 10.8:1 at WOT to not det. I was logging det left and right with anything leaner and without conservative timing. Running that AFR on the 550s gave us a duty cycle of over 90% on a stock fuel pump and system. I personally do not feel that was safe at all and provided solutions to offer ways to keep det down. Mind you, this was a humid day here in Buffalo where temp was about 80. Intake temps where far more than 10 over ambient on this car.

 

didn't read to the bottom but water meth is another option if no one else posted to control detonation

 

or anything over 15000rpm. should do the job. depending on the pulley you upgrade to. ceramics are way to expensive and not necessary if your just upgrading for the 9.5 psi pulley. i just got my shaft section rebuild by some dude that rebuilds top fuel dragsters SC in MO. all he did on on my shaft end was replace the bearings for better ones and used some high velocity grease. its really not the bearings/ shaft that causes the problem its the lubricating factor.

 

 

the pulley side of the shaft has no constant flow of lubrication, hence heat and other debris builds up and causes the bearings to fail. When the bearings fail the shaft fail. so the main cause is the lubrication.

 

^^^that's why gompka came up with the grease fitting solution.

 

yep and using industrial grease. thats is why he also doesn't use ceramic.

 

Exactly, but it doesn't hurt to change the shaft/bearings out either, especially for the 05-06 guys buying used s/c's.

Remember, if you hear/feel that there is a problem it is most likely too late, the bearings are damaged, and if the bearings are damaged most likely the TRD shaft is damaged.
Another benefit of my setup is that the shaft will take a lot more abuse before its damaged, the bearings should toast way before any shaft damage occurs. But then again if you use the grease and do a grease fitting, shouldn't have to worry about anything breaking.
Also, Datswhtshsed, is correct heat is the number one killer in this case. As a perfect example, most of my orders are from places like TX, CA, FL

 

if your buying injectors go 700cc and a 12 pound pulley

 

If your going S/C buy a civic! You will need a spare car when the tC blows up!

 

In all fairness, the s/c might "blow-up" but not many s/cs have blown up tcs

 

I know I just have seen it happen on here and they are worthless unless they have the upgraded shaft and bearings plus all the bells and whistles. Thats my opinion though.

 

I think it just has to do with luck lol. I had the s/c over a year before and it wasn't bad at all to me. Except for the lack of power. I made 270whp. So I went turbo instead. Either way going s/c or turbo you will get problems regardless.

 

There are a ton of people that dont have any problems with the SC you have to understand that people will only post when there is something wrong with their sc hence you hear more negative than positive

 

Why are you not supposed to use ceramic bearings with grease for lubrication?

 

Isnt the IAT sensor in the maf? If so and you are reading intake temps off of a scan gauge or other device reading the factory sensors, it is reading intake temps at the maf sensor, so it does not give you reference of the actual air temp to the engine.

I ran 550's with the 9.5 psi pulley also tuned to around 10.5-10.9 and the injectors were reading about 78% duty cycle, when I switched to ethanol and a Walbro, the duty cycle on the 550's were approaching low 90s. I would go bigger if I did it again...

 

Chucktown...are you still looking for injectors solutions?

Supply-wise, on paper, the 440cc should be able to handle the basic setup and the 550cc should be able to cover anything else you'd really be able to through at the engine with a supercharger on it.

...but Paul's been around this game for quite a bit. He's just looking out for the benefit of keeping your engine healthy from the experiences he's had tuning on these cars.

If you have a good tuner, there won't be any tuning difficulties between the 440cc/550cc/700cc injectors. ...and it's always nice to have a little headroom for what ever the future may bring.

 

You still have to use the grease no matter what...
ceramic are overrated when upgrading for the 9.5pulley. they are expensive and necessary. anything over 15000rpm should be good enough..

 

I dont understand why the injectors are maxing out at such a low amount of boost. The 370's on my Rb25 @ 9.5psi are no where near maxing. Nor were the 550's on my SR @ 16psi.