denmah

iTrader: (2)

of course all testing is subjective and results may vary but in the interest of reading, comparing, and conversation i figured i would post up some results on 2 of our cars and changing out the turbos.

so we did a turbo swaps last weekend with donavans cars for a test, took the firebird with the 6.0 and billet s480, and the 5.3 notch with the s475, we put the s475 on the firebird and the s480 on the notch. reason why is, the firebird has a tighter stall converter and since its a little portly (4060 with driver) it needs the 60ft to really fly. it was hard to build boost with the larger turbo without going crazy on the converter and ruining how the car drives essentially, the notch, since you can get like 4500 on the trans brake easily, would make it easy to light off that big exhaust side s480, so since the notch is lighter and is more race oriented, it made the decision easy. Don swapped the turbos and we are proud to say the operation was a success. the trans am lights the s475 much easier on the foot brake and we can basically open the wastegate sitting still, so that should fly, and since the converter is huge on the notch there is basically no difference in spool, we wanna throw either one on the dyno and see the power difference and if they make sense. but thought that would be an interesting report for all of you haha

Blackpanther99

iTrader: (8)

Interesting stuff. Always interesting how weight affects everything.

Keep us posted on the dyno results for the Notch. Taking it to the track soon to see some more accurate results?

SUTTERERMAN85

iTrader: (42)

Im very interested in seeing this as well. Thanks for all that you do.

SS2035

ya keep us updated!

ittwgn

were they both t6 96mm turbine 1.32 ar !!??? with the only difference being billet 80 to cast 75mm compressor wheels !!?? its just confusing me when you say big exhaust side s480 !!! when they could be the same !!! in for track results also !! cheers

denmah

iTrader: (2)

the s475 is the cast, t4, 110 ish AR and 80ish mm turbine i believe i dont know the exact numbers

the s480 is the billet, race cover, 96mm turbine 1.35 AR t6

denmah

iTrader: (2)

we took the trans am to the track yesterday but it rained out.

shame it was ready to rock!

Sarg

iTrader: (6)

Very curious to see how they both do.

78buturbo

iTrader: (1)

I'm In for results

SUTTERERMAN85

iTrader: (42)

Prob the 83mm turbine on the s475. There is also a 87 and 92.

offaxis

iTrader: (19)

In for results

Blackpanther99

iTrader: (8)

Damn that sucks. Theres always a next week

denmah

iTrader: (2)

we are going to try friday at maple grove,

we have this thing opening the wastegate at 14-17psi whatever we set it at, on 3100 RPM foot brake, she is ready to kill

DrTurbo

iTrader: (3)

Crank on it......that billet 80 loves 20+psi...lol

denmah

iTrader: (2)

yeah for sure, it bent 3 rods on the gen3 6.0 we had in the car on 26lbs

it has a gen4 rodded 6.0 and 243 heads now, but we put that turbo on the notch

wich has a gen3 5.3 in it lol. gunna take it out on 20ish, gotta see what the car makes on the dyno. it did 609 on 20lbs before i believe

traps 140 on 22lbs

djt81185

iTrader: (3)

How are you getting them to hold that much on the footbrake. Mine was creepin thru the beams with almost no boost at 3100.

Any special prep or procedures or parts to help when on the footbrake?

LS1 240sx

iTrader: (1)

on the notch when it had a s475 on the dyno what RPM did you ramp to before letting off?

TDMKR496

iTrader: (3)

In for the results!

Sarg

iTrader: (6)

How about the notch? Does it spool that 96mm turbine ok?

Camaro9969

iTrader: (12)

Wow 26lbs on the Gen 3 6.0. Thats awesome not that it bent rods but i'm sure it was ok up until that boost level