s300 turbine wheel chioces

[dmaxvaz]

i picked up a s300 turbo that i am going change the wheels in it. The specs are: 62mm comp wheel and 65mm exhaust wheels, also its a .80ar exhaust hsg. My question is to the people that have these turbos; what would be a better choice in turbine wheels? i am torn between the 71mm and the 74mm exhaust wheels. i want fast spooling, all around driveability (daily diver). This turbo will be replacing the ihi in my twins. I am also considering using a 65mm titanium ball milled comp. wheel.

 

[02bigstrokin]

mine has a 74 wheel done by woodruff diesel and i like it. ive never had a 71 but it spools great. can tow whatever i want. i would go ahead and get the 66 mm comp wheel. it wont be that big of a difference.

 

[dmaxvaz]

mine has a 74 wheel done by woodruff diesel and i like it. ive never had a 71 but it spools great. can tow whatever i want. i would go ahead and get the 66 mm comp wheel. it wont be that big of a difference.

do you need a ton of fuel down low to light it? i dont have dual fuelers, and i dont want a bunch of smoke rolling out at every light.

 

[02bigstrokin]

no, dual fuelers really only help up top for the most part. just dont put big injectors in it if you dont want it hazing all the time. i drove mine for a short period of time without dual cp3's and its fine. i meant to add earlier, i dont know what the .80 a/r is but i think thats the 14cm cast. if so you will run into drive pressure issues in a twins setup like trent did. you'll either have to get the pucks changed to 7/8" like trents or find a ss housing

 

[dmaxvaz]

no, dual fuelers really only help up top for the most part. just dont put big injectors in it if you dont want it hazing all the time. i drove mine for a short period of time without dual cp3's and its fine. i meant to add earlier, i dont know what the .80 a/r is but i think thats the 14cm cast. if so you will run into drive pressure issues in a twins setup like trent did. you'll either have to get the pucks changed to 7/8" like trents or find a ss housing

do you know where i can find a 16cm ss hsg?

 

[sweetdiesel]

mine has a 74 wheel done by woodruff diesel and i like it. ive never had a 71 but it spools great. can tow whatever i want. i would go ahead and get the 66 mm comp wheel. it wont be that big of a difference.

I agree


and it will light no problom might just want to pull some timing down low:thumb:

 

[02bigstrokin]

do you know where i can find a 16cm ss hsg?

you might check with some of the turbo shops. its a htt housing so you could always just call them, but they probably want an arm and a leg. try chris(engineered diesel) pm me for his number. or try gillet diesel. they are who trent deals with and they know turbos real well.

 

[SDP]

do you know where i can find a 16cm ss hsg?

I was told this housing has quite a bit larger wastegate, much better for twins. I'll be using it when I upgrade soon.

 

[02bigstrokin]

I was told this housing has quite a bit larger wastegate, much better for twins. I'll be using it when I upgrade soon.

yeah they are 1" pucks instead of 5/8 on the cast housing.

 

[TrentNell]

Vaz , if you take that housing apart you can punch out the 5/8's waste gate ports to around 13/16" - 7/8" for free put the high throw cover on it , and it will flow enough for the twins , with the stock 5/8" ports my setup would put out 60 psi with only 22 coming from the big charger with the gate all the way loose , once the gate was punched out it was around 52-53 with 30 psi coming from the big charger and a medium gate setting . The SS housing is worth it if you have the money it spools nice and the gate is bigger, on the stainless version i would go with the tight A/R ( 13cm ) because the gate is so large you can get away with it . I didnt loose much if any drive pressure going to the 16cm housing from the 14cm , I would choose the 71mm wheel if your just generally having fun with it , if you plan to run it hard with dual cp3's or go bigger on the atmosphere go with the 74mm turbine , my turbo setup with the 71mm turbine wheel / 66mm comp wheel still towed better than stock with awesome egt's .

 

[S Phinney]

I haven't used a 71 exhaust wheel in my current turbo but the 74 and 16cm stainless housing works really well. I drive daily and tow my equipment around as needed. I will be going with the bigger twins this year. I had a 14 cm cast housing before and like the 16 stainless better. I noticed that the torque is flatter with the 16 and it spools a little quicker than the 14 did. I did notice a drop in drive pressures with the change.

 

[TrentNell]

I haven't used a 71 exhaust wheel in my current turbo but the 74 and 16cm stainless housing works really well. I drive daily and tow my equipment around as needed. I will be going with the bigger twins this year. I had a 14 cm cast housing before and like the 16 stainless better. I noticed that the torque is flatter with the 16 and it spools a little quicker than the 14 did. I did notice a drop in drive pressures with the change.

I think i would have seen a drop also as a single , but i proved to myself that the restriction ( if you want to call it that ) in my truck was the S480 not the top turbo . No matter what i did i could not get the DP down to less than 62 psi with out running less power in turn less boost ( peak hp around 700 )

 

[dmaxvaz]

THANKS GUYS FOR THE INFO:thumb: