dieselman88

I've got a 98 ls1 Trans am, ls6 block, 243 ported heads. Currently has the on3 76mm turbo kit on it. My buddy has a 76mm turbonetics .81 ar and .96 on exhaust side I believe. Just wondering if it would be worth it to swap it out, or if id see any gains at all.

jay_rich

iTrader: (8)

basically the exact same turbo unless you get the turbonetic 7875 which had a 75mm turbine.

Jay

dieselman88

Was just thinking about upgrading to a better turbo this winter. Seems to quite for a turbo car, can barely hear it. Thought about maybe running the wastegate back into the exhaust as well

FourG63 97GST

iTrader: (1)

are you maxing out your current turbo? not sure what the goal is to justify the upgrade.

dieselman88

No, not maxing it out. You can hardly hear the turbo spool, even with cutout open. Sounds nothing like my friends precision turbo, but he also paid a pretty penny for it too.

The BallSS

iTrader: (9)

Just for reference my TC78 is quiet too but once I put the hammer down and get into boost and wastegate opens it sounds like all hell is breaking loose in the front of the car lol.

dieselman88

Even when I get in it, still pretty quite. Could sound different outside the car tho, need to get a video of it.

FourG63 97GST

iTrader: (1)

Tturbo noises are mainly from the compressor configuration.

you're friends precision most likely has the antisurge housing, almost sure the HKS T51R started this trend, designed to make lot of noises as well as to be functional

The BallSS

iTrader: (9)

I got a TC7868/1.15AR/BB unit with less than 1,00 miles on it I may be looking at selling. Just sayin. ; )

LANCE ATKINSON

iTrader: (8)

The blinker is bout as loud as the turbo in that video! Just sayin😎
Sounds good though👍🏻