fastjweb

iTrader: (2)

Swapped the 78/75 for a S366. 16 psi through 2nd, seeing about 18 psi in 3rd. 14 degrees, meth, mid 10's afr. looks like 6 seconds 55-111 on the logger.

Isak81

How does the S366 feel vs the bigger charger?

Vortec350ss

iTrader: (20)

it certainly sounds strong.

fastjweb

iTrader: (2)

It feels better down low and mid range. I had a 70mm on 15psi, and worked great, but it was before I had meth, and my timing was real low due to iats. When I had some time switched to the 7875 and added meth at same time. I added 5 degrees more timing, and the 78 still couldnt match the 70mm in the 8th mile, but did pick up by the quarter. the 66/73 I have now should be able to do what the 70mm did if not better, and feels just as strong as the 78 did up top. The track will tell lol. I think for my combo, small motor, small cam, this smaller turbo will shine. Its goals too though, I know the limits of my fuel system, and dont plan on going faster then 10.80s. so im trying to have something that will be as effecient as possible, reach my track goals, and be a fun street truck.

Vortec350ss

iTrader: (20)

10.80's! Damn those are good times.

You and I have similar goals. I have a lofty 10.7x in my mind... its going to be hard to accomplish.

GMCtrk

iTrader: (27)

Looks fast from the speedo.

Breaking down the 10s barrier is hard

fastjweb

iTrader: (2)

10's is hard lol. 70/64 11.02 at 121.2 15 psi 9.5 degrees
78/75 11.07 at 121.7 15 psi 14 degrees/meth
66/73 ? lol

fastjweb

iTrader: (2)

Good luck to you on your mission!!! I dont know the perfect combo, The MP70 on low timing and rich AFR, PTC 3500 and 3.90s, 214/218 562/562 111 lsa cam got me damn close. Granted its 4400lbs, so if this S366 gets me there, I think its very streetable combo that will work for the single cab guys with 4.8s.

Choda

iTrader: (1)

This is the same exact thing I am doing right now. I have a 5.3 w a triple 12 and 70/65 on pump at 11 psi. Makes ~500 wheel. I just got meth, Trick 5 inch race intercooler and a 78/75. I really hope the meth and turbo work together to keep my short times the same if not better and allows me to pick up power on the top end. BUT what you have provided is the opposite data. arg

fastjweb

iTrader: (2)

Choda, i texted you. truck still has 3" intercooler and full exhaust. open wastegate dump now though.