Hey all, having the code3 pulley and needswings intake, I'm making mid twelves in the 1/4-which I believe is about right?
If I were to go with a tune what kind of improvement might I expect? Is it possible to be high elevens?

 

no, but in my case, it cut 3-4 tenths off my time...dual cai added another 1/10th off...so 12.2-12.3 is where I believe you will be...now go out and prove me wrong...LOL...

 

+1 with oledoc2u.
mine with the c3 oem modded intakes and dr's netted 12.7 @ 110 mph with no tune
were the tune really comes in is the midrange power. mine was fast before but now with a dyno tune the powerband is strong across the board. car now breaks traction at a 30 mph roll! off the line it fries the street tires. hope to track it in the spring, looking for 12.5 to 12.3 if im up to the task. i know the car is!

 

Tune will get you into the low 12's, knocking on the door of those elusive 11's.

 

what would give me a bit more and tons of peace of mind is a needswings pulleysaver kit for us c3 folks. maybe a mass emailing is in order? lets let rob know we love his stuff and want the kit!!

 

I am doing the tighed1 belt wrap mod to mine. I am having a friend of mine who owns a plasma table make me a support to run from the new pulley up to the other pulley much like what Rob did in his kit...I will post the results, but I won't do this until warmer temps...it's cold here...lol

 

i tried dj's wrap and it was just to close for comfort for me. so miker machine the ribs down smooth and i installed it. got the clearance i wanted but the pulley (plastic pulley) only lasted about 5 min. and started grinding. so off it came. that got me thinking of robs kit and the replacement with the smaller pullies with better larger pulleys.
i have contacted rob and spoke with him at length. he just needs a nudge to know the c3 guys would be interested in it

 

5:01AM??? Couldn't sleep huh Doc? I couldn't either if I was thinking about modding my new car. Wait, come to think about it, I have trouble sleeping too. LOL

 

oops, missed your post Rudy. I was working @ 5 am, lol....now, why did the pulley fail? I had Mike turn one down for me...is it going to fail? If so, then we need to talk to Rob....or suggest some pullies we need...I can get bracing made...

 

I think this would be a much better solution for you guys....or something like this. This is the LET idler pulley from my 181mm crank pulley kit. Using this and a spacer to position it should be about right...
Better than turning down the grooved pulley...

 

Awesome tablecloth Mike.

 

That's my chair seat.... antique chair that I recovered the cushion with scrap material from my sister(interior designer).... you making fun of me???

edit: free material is very good!

 

No Mike... I was not making fun. I like dragon flies.

 

the thing is mike after replacing 3 pulleys on my initial inspection then the pulley you turned for me only lasting minutes, it got me to thinking of the danger that is just waiting to explode in the engine compartment.
by having a pulley saver kit for the c3 install you eliminate all the cheap pulleys with larger better pulleys AND get a belt wrap at the same time. for robs price on the kit its a win win for everyone

 

still not understanding why he pulling failed...taking the grooves out weaken it or what????

 

32, interesting that it came apart like that. It must be too brittle when thinned down. I did a third one, but cant remember who for. I havent heard anything back about how it worked, or didnt, for him.

 

I ran mine for over 5000 miles without incident. Was your pulley a used one machined down or a brand new one from MB? Only reason I ask is it spins the opposite direction when you run the belt under it vs over it. If it was previously used, I could see the bearing not liking it and giving it up because of this. If it was new, I got nothing.

Mike, what would it take to machine up a few with the outside ribs to help keep the belt tracking on the SC pulley correctly and the appropriate spacers and then press in a better bearing? I'd be on this is a second. Also, if you're up for making another oil pressure standoff, shoot me a PM or give me a call and let me know what I'd owe you. Thanks.

 

the pulley was a brand new never run m/b pulley
it was definatly a bearing grind i heard with a stethoscope. i removed it as soon as i heard it. imo as this was the 2nd pulley in the same spot to fail they are just poor pulleys.
woody did warn in a post about the bearing spinning faster due to the creation of a smaller diameter pulley. i also had a tensioner pulley bearing AND a oem s/c pulley bearing go bad. thats 4 bearings on the full setup. too many for me!
while none of the bearings seized and caused any damage it could have just as easily caused a total mess under the hood. thats why im so interested in rob's setup adapted to the c3 crowd. then everyone sleeps better at nite

btw rc, mike left the outside edges just machined them for a great fit. i think his work was top shelf just preformed on an inferior product

 

32, thanks. So the bearings were bad. I thought that you were saying the pulley came apart. There is quite a bit more lateral force from the belt also when you put it under the pulley instead of over it... I know that is a 'duh'.... just saying..

 

you machined me one Mike, I haven't installed it yet...now, I don't know if I will....DJ didn't use this pulley, did he? He used a different pulley I think...guess I need to know before I go to the trouble to have a brace cut out for the install...Mike, I found an old friend who use to do some specialty welding for me. He has a plasma table, and I haven't seen it yet, or how big he can cut, but I know he will be able to cut me a brace, he has a pirana, for punching the holes...glad we hooked back up...I have a few other mods in mind...