GMCtrk

iTrader: (23)

So, first off, this is for my truck, specs in the sig. In short it's a 10.6:1 stock 6.0 bottom end with ported heads supposedly flowing around 300 cfm. I'll start off by saying that I am all about throttle response and pleasurable daily driving meaning there's power throughout the entire powerband. I thought that putting a 6.0 in would help, but honestly, 6 liters just doesn't cut it at all. It may be fine in a 3200-3700lb car, but not a truck weighing 1000lbs more. So the engine was set up for N/A hence the high compression. I'm going to just run it as it and be conservative with the tune and run good fuel and see what happens. If it pops so be it, just another reason for a forged 370.

Anyways, I came to the conclusion that a turbo setup was what I wanted. I know the TC76 has pushed a 4950lb 4x4 into the 10.30s on a 370, which is amazing. So my question is what is the difference in feel driving between the tc76 and tc78? In specific I am looking at the ball bearing models. On ForcedInduction's website they both cost the same hence this question. My main goal is little to no lag and I'd like to build boost in the 30-35% TPS range while cruising in overdrive on the highway to facilitate easy hill pulling. I'd also like to make somewhere around 550-600 rwhp, but have room for much greater power in the future. I will run an Isky cam 215/215 .566" 114 lsa along with a 4l80e and stock converter which has proven to work very well with turbos.

Thanks.

hellbents10

iTrader: (10)

TC78BB will be instant boost, it will hit like a screw blower at 2500.

stock48

iTrader: (17)

I have a new T78, BB, water cooled, 1.15 AR, 3.5'' Vband that would be perfict for you This turbo should be worth a solid 75~100HP over the TC76, .96 Im running.

Check with me before you buy a TC78 we might be able to work something out.

crashly

put 2 on......

bad6as

iTrader: (17)

i was gonna go 408 with a gt88 but now im thinking about a 347 but still picking a turbo what is gonna spool better and give more peak power, on pump gas

IT_SS

iTrader: (5)

has anyone had any luck finding info on the Turbonetics TC Series?? It seems the Forced Inductions are the only one who carry them...

vipvegas

iTrader: (13)

TC78 for the money....

ScorpionT

Its just a T series with a compact compressor cover.

vipvegas

iTrader: (13)

spools faster but still has ***** on the end...

IT_SS

iTrader: (5)

gotcha, thanks

bad6as

iTrader: (17)

what would be the next size up on a tc78?

99Z28LS1

iTrader: (4)

ST/SX 80 from FI would be my choices

ScorpionT

I think he meant in the Turbonetics line. If thats the case, a standard on super series T78 would be the next step, then the Y2k 80mm.

transamfreak01

iTrader: (8)

i think the 78 is going to be to small. its gonna spool fast as **** but what about backpressure issuses? i would go with a st80 atleast and call it a day. that will give you a lot more room to grow later

bad6as

iTrader: (17)

i want 800 wheel on pump gas with no meth on a 347 with a 4l60e trans. but not sure on turbo

darooke

iTrader: (13)

good luck on 800 hp with no meth. I don't think it is possible.

bondosgto

347 w/turbo 800 rwhp no meth? good luck. a 402 turbo'd could do that

bad6as

iTrader: (17)

i was gonna do a 408 with a gt88. but i decided to go 347 and i was thinking about a tc78 but if i cant make 800 i cant. i want as much as i can on pump gas,

GMCtrk

iTrader: (23)

It looks like the TC78 is the way to go. Now just to decide on the exhaust housing

bad6as

iTrader: (17)

what the next size up in the same price range?
what can a 347 with a tc78 do on pump gas?