sloppy mechanics s480/s475 testing
sloppy mechanics s480/s475 testing 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
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
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?
Keep us posted on the dyno results for the Notch. Taking it to the track soon to see some more accurate results?
On The Tree
Joined: Jan 2012
Posts: 131
Likes: 0
From: sydney australia
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
the s480 is the billet, race cover, 96mm turbine 1.35 AR t6
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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
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
Any special prep or procedures or parts to help when on the footbrake?
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
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