Time to go twin turbo.
 

I think it's time to try a twin setup. Wondering how twin magnum 7675's would work with a 5.7 with triple 12 cam. I would like this setup to spool up quick and be capable of 800 hp to the wheels. I already have one 7675 so figured I get some opinions on turbo selection. Let me know what you think.

I dont really understand turbo math. That's why I'm looking for opinions.

i agree and think 76s on each side would take forever to spool on a small ci engine with a mild build.

Most likely more turbo than needed. I have a Trick twin kit sitting here for the day I find the right truck but I had it setup for Borg S257sxe's (57/61's) but will be going with a 6.0 most likely. I believe that those turbos will light very quickly, give me a good power band up to 6300-6500rpm, and should be no problem 800whp or better.

A guy I talked with said he made 740/810 @ 16psi on a 6.0 with the S251's which are sized a bit smaller the the SXE models (47lbs./min. vs 65lbs./min airflow) and Borg rates the S257sxe's at 625hp.

Another combo - 383 with a pair of cast Turbonetics 6265's on a manual transmission made 1012/972 @ 19psi. Said the turbos made more steam (around 1200whp) on a smaller cubic inch engine.

Just to give you an idea for comparisons

Thanks guys. Glad I asked the cheap side of me wanted to only buy one turbo :). So I'll check around for 6265 or 6266's. What about wastegates? How do I size them? Just go by the size of the turbo's? I'm thinking of using a treadstone trttc9 intercooler and turbosmart raceport bov.

I will want to be capable of 800 to the wheels. I want some more power down low that's why I'm thinking fast spooling. My truck is a daily and it will be more fun having a little more down low. I may need to call a few turbo manufacturers and get there opinions. It definitely needs to beet my nephews ford velociraptor.

Check speed engineering's new twin kit. Turbonetics 64mm turbos, you can get a bigger turbine AR (.85 I think) to get the power you want. $3999 complete.

https://www.performancetrucks.net/fo...o-kits-550048/

I already have trick performance manifolds. If I didn't I probably would have purchased that kit just to try it out.

Ah. How about look at the VSRacing GT35 clones. They could be excellent. Both responsive and very powerful.

Could always ask the people that built the kit. LOL
The gate size would be 39mm or 40mm 2 bolt config. Thats what your pipes are set up for..
7675 way to big for turbos for small hp. Tha's a 1200+ set up easy.
6266 can make 1000 through a slipping converter. And would would well, anything in the low 60's range is fine for 800hp.
I have a inexpensive twin core I could sell you. would fit the truck and power goal. or if you want a treadstone core we are a dealer for them.
Bov Turbosmart have one on the shelf or the raceparts solutions.
We could set you a nice discounted price, for these parts for being a returning customer. just saying. :)

Rick

That's funny! You make it to easy and I never learn anything :). I am interested in the inexpensive twin core,bov,wastegates's, and let me know what turbos your thinking. Send me prices when you have time. Thanks Rick