Congrats again, solid #'s

 

Ah it must feel good to get it back on the street. Who built the engine?

 

I'm running Aster's bracket, and the boost curve was fine, but a little bit of jaggedness up top. I'm not sure if it was belt slip, or if I'm just at the limit of this 3" wide intercooler.

It's been on the street for a little over a year now. I built the engine but had a machinist do all the machine work, and walk me through the engine assembly.

 

Congrats on finally getting some numbers on it! You can be proud of that one for sure!

9 sec car....

 

Nice numbers! Freakin' beast!

 

So any other thoughts on why the power dropped off up top?

 

What size injectors are you running?

 

Do you have the data logs from both dyno pulls? Could be camshaft, could be blower, could be the exhaust like you said.

 

Do you have an overlay of the boost?

 

Yes I do. Fueling was a little bit rich for my taste. I did get a hint of knock for some odd reason. I don't think it was real.



For reference, that's only 0.7 degrees of knock. Yes, the fueling is rich, but his tailpipe O2 was reading 0.4 leaner than me, so I didn't want to lean it out too much. Granted, tailpipe readings are usually leaner, but I've also heard that running on the street is usually leaner than dyno as well.

It also looks like I did get a little belt slip, that or maybe I'm at the limit of my flow rate of my intercooler. It's only a 3" wide one, maybe I need to upgrade to a 4" version.

 

I think that's dang nasty power for pump gas. And adding timing would be careless. You already experienced what happens when your motor fails. (Down time sucks and costs money!) Congrats on some great numbers.

 

Very true. This is the reason why I didn't want to dyno it lol, because no matter the number, you always want more and start second guessing everything like how much more would 1-2 degrees had gotten me.

 

falling off up top:


Inlet Hat filter
FMIC restriction
camshaft
Exhaust
belt slip possible but doubtful with that bracket and the new belt.

 

Sorry if I missed it in another build or post but are you running a manual or auto?

 

6-speed.

 

ive been messaging GMHTP to do a side by side comparison of front mounts pre and post to see which brands provide better IAT and the least restriction. I think that is an article we would all enjoy or benefit from in some way.

 

I may switch out my intercooler for a 4" one. It's a cheap swap, and couldn't hurt.

 

Would you get the same clutch you have now when it's time for a replacement?

 

Are you referring to the cx 4 inch?

What's the compression on your setup?

 

awesome setup! 750 on the street gotta be crazy. I hope to be there someday.