I'm trying to decide on a turbo for my daily driven truck. Just looking for some feedback and opinions. It's a stock LQ4 with a TR Blower cam only.

Would a PT88-47 be too much? I would need a new turbo kit if I went this route..

However, I could keep my same turbo kit and just bolt on a TC76 or TC78.. This would be the most cost effective but I'm not sure if it will deliver the results I'm looking for.


Right now I have a 62-1 so anything bigger would be a step in the right direction I guess..

 

A 47/88 is some pretty serious business, your Lq4 will last much longer with the 76 or 78. My PT88/T4 is fine on the street but I like the TC76 much better for daily driving. I've been 10.30's with the TC76 in not so great conditions.

 

what are your goals?

 

Most likely I will be rebuilding my Lq4 into a forged 370 within the year.. So it really doesn't matter how long the Lq4 last. I figured that the lag of a PT88-47 would be a little like traction control for the street.. I could be wrong though so correct me.. And then I would have plenty of room to grow

I would like to hit 10s on the Lq4 before it pops.

 

I don't have much traction on the street with the 88, even in 4wd. The 76 is much more controlable... A S480 might be a happy medium.

 

no traction on the street here either! if your going 370 go big and get a 88, the tc78 should spool faster

 

Yeah I personally think traction will be an issue either way I go..

But to meet my goals I think a PT88 would be best..

GO BIG OR GO HOME

 

The PT88 is actually pretty easy to control with your foot since boost takes a while to come on whereas the smaller turbo would spool quicker. I will have my pt88 on my 5.3 here in a few days so Ill let you know how that goes...

 

id go for the smaller turbo for DD power comes on quick and when you need it

 

i agree. you really need to look at the compressor map of the turbo. bigger isnt always better. the pt88 is laggy, i had one. imo a gts76mm would be the biggest id put on a truck. it will spool much faster and support 750rwhp.

if your going over 750rwhp.... get a pt88, if not then dont get it but a 750 REAR wheel hp truck is a serious setup.

additionally,, once you start getting up that high in hp the T4 flange becomes an issue. A front mount 400cu motor with a pt88 is a horrible combination.