vogun16

iTrader: (7)

im upgrading the crappy Chinese t61 that came with my turbo kit to a masterpower t70, only thing i was wondering was if a .96 ar hotside or a .68 ar hotside would be better. the rest of the car is stock except for walbro 255 fuel pump, 60# injectors, and mac exhaust with no cats, just curious to the advantages and disadvantages of going with the bigger turbo.

lt170chevelle

iTrader: (2)

Wouldnt it only be a matter if you want a better flowing, cooler top end,but lees bottom end, or a trade off of more bottom end ,but less efficiency and flow up top? i would personally go with the bigger .

Sluggish

iTrader: (10)

go with the .96

DrTurbo

iTrader: (3)

.96A/R......anything else would be a big backpressure problem. The turbine in that MP unit is already to small for a Ls based engine. No sense in handicapping the setup.

vogun16

iTrader: (7)

thanks that kinda what i figured will be ordering one as soon as i come up with some money lol

Johnv

get theb "Q" trim exhaust wheel as well for a bit more flow.

t_thall

iTrader: (4)

the .96 works great on my 6l. Tried the .68 first and it was crap.

BlwnLs1GTO

iTrader: (12)

How about 2 X .68 T4's turbines on a 403 front mount TT setup?

Do any of you see a problem with this setup?

Thanks,

vogun16

iTrader: (7)

whats the difference with the trims like "q" and "p" and stuff like that

chevellepowered

iTrader: (37)

in parish build he had .68 one first swap to the .96 and only gained a few hp,, not much at all.. i just bought one with the .68 it should spool real fast and i have a 44mm wg.. i have a 5.3 with 853 heads and ls6 cam by the way..

vogun16

iTrader: (7)

ya they are the same price for the .68 and .96 so i figured mine as well go big or go home right.. lol whats the advantages of having a 44mm wastegate? i have a 38mm.. i heard that smaller wastegates are better for controlling lower boost(i.e. 5-10) and bigger one better for bigger boost (i.e 15-20) i only want to run about 8-10 lbs so a 38mm should be good correct??

TurboAv

iTrader: (6)

You've got that backwards. You need a bigger gate if you are trying to control low boost. Think of it like this, all the extra exhaust you aren't using goes out the wastegate. If it's to small boost will creep up and exceed what you want it set at.

vogun16

iTrader: (7)

so will my 38mm be ok for about 8-10? or should i go bigger??

Johnv

38 should be ok, but prob not much more to go with a 44mm and be done with.
A "Q" trim wheel flows more than the std "P" trim.

vogun16

iTrader: (7)

why would anyone want a "P" trim instead of a "Q" trim?

67camaro

iTrader: (28)

how much power did you make with the 61?

t_thall

iTrader: (4)

quicker response

vogun16

iTrader: (7)

350rwh and 400rwt on a mustang dyno. but that was at about 4200rpm cuz then i lost boost and power, the turbo is to small and was a cheep shitty chinese one, at high rpms it back pressures back into the motor.. now im looking for a bigger turbo

67camaro

iTrader: (28)

I have a brand new MP T70 .96 but im not sure I want to sell it just yet.

vogun16

iTrader: (7)

nice! let me know if you want to sell and if anyone else has a bigger turbo please let me know! thanks!