I'll still change. I have Cuxs ati crank pulley and this blasted 3.12. Need to buy the 27t cog and it should be spinning just right. Car is pulling great. Took my friend for a ride that did the welding. He had a smile ear to ear lol. Car is running great for the moment. Can't wait to try crank and other pulley out. Prolly start ripping it apart again on my next day off.

 

Went to the track to see what mph it would get. I'm running the 2.87 pulley and hitting 21psi. It's only hitting the traps at 95mph in the 1/8. Not to bad. Right now the blower should be spinning around 65k. When I install the ati, it should jump up to 72k.

 

So is that about the same traps as the t-trim?

 

Yeah till its tuned. It actually slower right now. Lol

 

Well you need more boost then, sucks to spend money to go slower :-(

 

That's actually really good. You should be able to squeeze some good power out of it upon retune, AND even more obviously when you up the boost and rpm

 

Just needs retuned... Last time I went to a bigger blower it dropped around 50hp right off the bat till it was tuned. I already know thAt this thing is gonna scream on passed the t trim blower come tune day.

 

Anyone who thinks otherwise is going to be sorely mistaken lol

 

Cant wait for results once you get it all sorted out.

 

How come? How much O2 correction do you need now? Are you expecting your MBT to jump alot so you can throw alot more timing? Are you running extra lean/rich right now? What part of the tuning do you think has to be fixed?

Curious if you compared your boost curves and how much different they are.

 

Been doing some testing with added idler pulley. I'm seeing 22.xx psi around 6300 now. I'm maxing my map sensor and car looses throttle. Hal thinks it's prolly a safety for over boost. Car is running great. It's seing 11.1 afr up top. With the smaller ti blower at 6400 at 17psu it made 580hp. Curious to see what this ysi is gonna do. Gonna spin it up to 7500 if it's still make good power and boost.

 

Dyno dyno dyno

 

Won't see dyno till after Christmas. I was just trying to work out any kinks in the setup and make sure my belt wasn't going to slip so much.

 

What do you need 4 bar map sensor? This is looking very promissing for ya!

 

I thought you had an external pressure sensor from the TI setup?

 

No still using the internal. That's one thing I don't understand right now. On the ti I was maxing it out, but still able to go higher according to my boost gauge. Before the crank pulley change, I was able to rev out to 7200rpms making 21psi. After the crank pulley change, I hit 22.xx and it stops pulling. Doesn't hesitate, buck, or cut out. It's like I just let off the throttle. Also no codes.

If I do a pull in 1st or 2nd, I get belt slip and won't make 22psi till around 7200. No issues. I might put my 3.12 pulley on and see if I can pull it to redline.

 

Yeah I'm hoping for great things with this blower.

 

get the external map sensor

boost, ait and cfm can all vary. Especially with your new piping and blower.

 

Yeah the setup has changed drastically.

Id venture to guess that you werent actually going past maybe 23 24 psi with the last one. Whats your boost guage model?

 

Selling this ysi setup complete. Something else has come up and going different direction. If anyone is interested in everything, send me a pm. Will make a forsale thread soon.