Ok, so I was originally planning on a single TC76 for my LSx swap in my Typhoon. However, I just gave my notice at my job as I'm moving to a better one...........which they then told me I have 136 hours of vacation. That puts an extra $4800ish in my pocket. So.......I got to thinking......why not go twins?

Twin ball bearing turbos...........think the driveability would be nice for the street? I'm not looking to build a trailer queen, but I also would like to have some room to grow for when I throw a forged motor in the truck.

I've seen a few twin setups here, including YellowSierra and Parish. I'm not looking to go 408", but rather staying a stock 6.0L displacement. How do you think a pair of the GT35R's would do with say a .68 a/r on the exhaust?

 

Ultimatly you should look at the power you want to make and save your money for the unknown as stuff happens. A single tc76 with a mps wheel and a .96 backside and a f1 wheel will hit harder then twin 35's and be good for 900fwhp.

 

I'm just worried about getting the truck all together and it having crappy street manners. I loved my stock Ty and the spool with that. When I went to the T76 BB, it didn't spool fast at all, but when it came on..........holy crap. I guess I'm just torn which way to go.

As far as power goals, ultimately I'd like to only be around 750 after I get the forged motor. I'd love to say "I want 1000+hp", but I'm never going to be able to pull that one off.

Thanks for the reply though. You do bring up a good point about the unknown stuff.

 

I'm no expert on spooling or turbo selection, but one thing to consider is that while you may have smaller turbos, you have half the exhaust pressure going through each one, so two small ones may take just as long to spool as one larger one with twice the exhaust going through it.

When I started looking into my kit, I looked into doing twins as well. The extra cost was a major turn-off for me. It's not just two turbos, you need dual oil feeds and drains, two wastegates, possibly two blowoff valves, tons of extra intake and exhaust piping......it adds up quick. For most people, it makes a lot more sense to run a single.

 

5880# Silverado SS. Bone stock long block save for some valve springs and 17psi of boost with the tc76. This truck will hit 17psi before 3200rpm. It hits plenty hard.


http://videos.streetfire.net/video/b...b600cc1069.htm

 

I dont see how 2 smaller turbos can spool faster, even if they were exactly half the size of a single, theres twice the parts to get rotating, and id bet more rotating mass also.

although, spooling, bovs, and wastegates sound great in stereo.

 

Might want to ride in two vehicles then with just that. One single turbo and one twin turbo. You will know the answer then.

Rick