I've read a lot the threads, but there are so many of them, help me out here. I would really like a 185 pulley, but there seem to be complications like injectors not quite large enough, heating problems, and of course the idler bearing. I don't drag race or sustain high speeds for a long period but I do like to accelerate. Has anyone run one of these without having to change the inter-cooler or other mods. Does the ECU RETARD (ign.)YOUR GAIN IN BOOST AWAY? or any other problems like A/F. I know the upgraded bearing is a must. How about the 181mm? Jeff

P.S. I presently have a Code3 and a Needwings style CAI. Also it seems a lot of pulley suppliers are no longer around. I can only find Eurocharged Performance. Thanks

 

I have no fueling issues with fueling and my 185mm pulley. My car has seen both the drag strip and the track.

 

Thank you very much. I appreciate the reply SRT6-Roadster. Mine's a drop top too. Did you know that they made less than a thousand of the SRT6 roadsters. Nine hundred and something worldwide. I tell people that it has all the earmarks of a collector car but that probably won't happen until after I'm dead.

 

No issues here either Max.

Coupe stacked 181mm crank & Code 3 on SC
Roadster 192mm crank

AFR meters in both. No fuel mods other than generic tunes on both.

 

That is surprising! Good to know.

 

Holy Crap! 192mm. Since I already have a Code 3, I could do that. How much boost are you reading? Is this a daily driver or pretty much a track car. From your DIY'S it looks like you're running a Super Cooler too. I sometimes drive this thing through the desert going from L.A. to Tucson or Vegas. I like your pump mod too.

Thank you tighed 1. My car comes off it's extended warranty next year and it's time to mod it up. I plan things early, especially when I see the vendors disappearing. Maybe I just haven't looked hard enough for them. Any recommendations would be welcome. Jeff

 

The 192 pulley with 24% supercharger overdrive falls in between the 185 or 62 (20%) and stacked 178/EC-65 (32%).

The 181 and C3 stacked overdrive the supercharger 33%. That's the most I've heard of anybody runnning and just a litttle more than a 178/EC 65 stack (32%).

See the attachment for more fun numbers. The pulley ratio calculations are legit and based upon the diameters I've gleaned from this forum. HP estimates are based upon my own unscientific formulas.

 

Thanks boostmonkey.

 

While I can only attest to a 181 mm pulley, myself and several others found the A/F ratio to be running a little lean at the top and needed some mod to the fuel system. I personally added the SL55 pump and the free flow filter and adjustable regulator from NW and a modified fuel rail. Some have gone with larger injectors but as I understand it, this required some retuning. I would be curious to know if those who had no issue with stacked setups or 185 mm pulleys are using the Zeitronic meter and can verify good A/F ratios at the top.

 

Thanks Jim

 

Well....everyone of these motors must be different with all the different responses. I can only hope you are monitoring your runs to see the real world. Let me put it to you this way. A long sustained run on a nice straight desert road....or several all out passes down the 1/4 mile, will over time take it's toll. On a lot things for sure, but lien conditions create heat like it or not. Better to be on the safe side and make sure you are delivering enough fuel. I can tell you all for certain my 62mm ran lien and needed more fuel. I can tell you for certain my roadster falls short of the 1/4 mile needing more with a 65mm. The roadster runs 12 flat all day long, but with the new tune I just put in her, she should break into the high 11's. The coupe has yet to see the track, but I already know she's faster than the roadster... Just play safe, or it could be at least $3K mistake if you can find a motor.

 

This was true in my case. Don't know if anyone recalls but I did a sustained high speed run (100-145) over a 20 or so mile distance and had my SC seize up. I was running the same stacked setup that I am running today. Around town I don't have the opportunity (small town) for extended runs. Out of town I know better NOT to do it!
Lesson learned.

 

So, with this scenario we can assume that they will run a bit lean at the high end, so some fuel delivery modification would be necessary to achieve ideal A/F ratios. Thanks Tighed for helping clear that up, it's too bad you had to learn that the hard way but again, some valuable info for those that follow. It's always tougher to lead.

 

The SC seizure would not be caused by lean AFR's.

 

I'm sure it seized due to the excessive rpm's that the stacked configuration placed on the SC. The highway run wasn't a steady 100+ mph run. It was a constant get-on-it at high speeds (high RPMs) while encountering traffic. Slow down for then accelerate to get around slower traffic, then do it all over again for the next batch of traffic. It was a blast but as I found out very harmful to subject the SC to that much punishment without breaks to cool down and recover.

 

Been running my 185mm pulley since Feb 2008 - I also installed a larger HE around the same time. My dyno runs (at sea level) right after the install showed I was running rich - I had the SRT tuned at that time to optimum performance with the stock fuel injectors, fuel rail and fuel pump.

The only issue I had was the smaller idler pulley that came with the kit gave way (along with the OEM belt) around 5K miles after the install.

I re-installed the larger OEM idler pulley and went with a larger Gates Belt and I've never had a problem since. (45K miles)

I don't race but my car has been subjected to the Texas Mile, high speed desert runs (+160 mph) and hard core canyon runs (hard on the gas / hard on the brakes).

I think the 185 is great for highway driving as it gives a huge shot of instant boost to blow by cars and have some fun in the curves.

Can't rate it for the 1/4 mile racing.

 

Great Info.

 

Yeah thanks Tighed1...lol.

 

Running a Texas mile is no worse than running several 1/4 mi runs. But I can assure you unless you have one of those motors I mentioned, it will run lien on a sustained run. How many runs? Only time will tell. But I bet you don't run like that everyday or for long distances. If I am wrong, then you are lucky. The motors are built well, but they are all a little different. More fuel solved my lien issues. A tune can solve them as well, so yours may be tuned to the rich side. The fine line is tuning to run right at the line between lien and rich...and that line is hard to find without a great tuner.

 

A Zeitronic A/F ratio meter can help in that regard. You can inform your tuner what you are seeing and can get a retune to get you close to the ideal. It will take some effort but it is worth it to keep your motor from self destructing.