Quote Originally Posted by skullzaflare View Post
I did not change pump timing at all. My EGT cruise interstate around 300c, heavy boost usually around 600c, extended boost around 650ish
I have a top mount intercooler which isnt very efficient, will be converting to front mount eventually

Just remember if you cut the exhaust in half, you will spool at half the speed. Compound was a combination of low end power (td04h-13t) to interstate power (SR50)

The sr50 also reuses the wasted fuel of the td04, i average 32mpg with this setup.

Again though i will note that i have a 4d56, so limits i have a 4k rpm limit, but i never go above 3200rpm. I know the 4d55 has 1k more rpm so that will assist you.


I say disappointed due to me dynoing several setups. I have run a td04-15t Billet along at 28-35psi, SR40 at 30psi, SR50 at 25psi, and td04h-13t with sr50 at 30psi.

td04-15t @28psi peak with 1000cc 50/50 meth/water, dynod 117rwhp/223rwtq
SR50 at 25psi (no meth anymore) made 121rwhp/217rwtq
td04h-13t with sr50 (no billet at the time) made 131rwhp/277rwtq
Thanks for all the info. The reason I'm doing parallel is also because the two turbos I'm going to try this with are a little smaller than the stock one but much more efficient, so spooling them shouldn't be much of a problem. I'm also thinking with some pump mods like timing and such I'll be able to get more out of it but damn you've got to love that torque these little guys make. If it doesn't make the power at least it will look and sound cool lol.