It's going to be 3 inch.

 

Great to hear NEP. You guys are loving the EFR turbos and already proved they work awesome on your other truck.

 

Those are some VERY interesting snails.......

 

Any updates?

 

Almost done, tomorrow it should be on the dyno.

 

Did it make it?

 

Yes it did. I spent some time yesterday dialing it in at 6 psi, then i spent a lot of time dialing it in at 8 psi today. I just wanted to test as much as possible before i released results and have been very busy doing so. I am tied up right now, will try to post some dyno graphs and a video later. I still need to do testing at 10 psi which i will be doing tomorrow. These turbos do work, instant spool time, virtually no lag!!

 

Ok, here is an update as of right now anyway. Everything is finished except that I want to still do some higher boost testing. But, like I said, testing at 6 and 8 psi and a lot of tuning over the last 2 days, I am very excited about the results!

Below is a dyno graph which shows stock vs. 6 psi vs. 8 psi, you can see stock it made 289 rwhp and 314 rwtq, 6 psi made 449 rwhp and 458 rwtq (this is what the Precision turbos made at 10 psi by the way), 8 psi made 493 rwhp and 508 rwtq. FYI this is a completely otherwise stock 5.3 engine truck, even stock exhaust, just our twin turbo kit.



Here is a video of an 8 psi pull on the dyno:

 

This is a great build and a great bolt on kit

 

Thank you!