soardrft

iTrader: (8)

Has anyone tried it out? Any dyno numbers? What's the response like? I have a single gt35 on 1jz and honestly I'm not impressed. So i want to scratch the single idea and do something different for a change.

xspsi6

iTrader: (31)

Obx=Chinese junk! Imo nothing good is going to come of that.

BartleDoo

iTrader: (1)

What are you not impressed with? You should be making some good power.

xspsi6

iTrader: (31)

If it's a chinabay gt35 then it most likely leaves something to be desired, I have seen 35r powered cars in the single digets.

soardrft

iTrader: (8)

At the dyno I made 349hp & 327tq @ 11psi(something around there). What I'm not impressed with is the spool. I turned up the boost to 18lbs but still felt laggy. Don't get me wrong the car pulls really hard when in boost, but I assume doing a twin setup will give me a better response. I have searched but have yet to see dyno sheets from an upgraded twin turbo.

stockhatch

iTrader: (12)

So like 9rwhp? Sorry, couldn't resist.

OP, as already mentioned, run far away from the obx twins.

SChema

iTrader: (2)

Twin turbo in parallel is not going to give you better spool, may actually be laggier than a comparable single in flow.

What A/R are you running on the hot side?
You want spool? Go with a smaller A/R.
You want good top end? Go with a larger A/R.
Double edged sword, you gain at one end but lose in the other.

Then again, nothing two-step and brake-boosting can't fix.

soardrft

iTrader: (8)

Thank you for that answer. I will have to look into rebuilding a 2jz bottom end and hope to see better spool results. My a/r is .63

cartmill

iTrader: (3)

at what RPM do you hit full boost in 4th gear?

a .63 t4 should be a good match for the 2.5

you coudl always downgrade to a t3/t4 turbo, but you'd have to get a new manifold.

soardrft

iTrader: (8)

I'm running a t3 currently and according to the graph I hit full boost just above 4k. But I also have another sc with the stock twins and that car in my opinion is better for street. I heard of doing mods or even going to usdm twins, but nothing concrete on spool. I would love to see dyno graphs on cars with modded 1jz turbos or even usdm turbos.