Hi,

I have to decide between those two turbos. My hp goal is around 400 - 500rwhp. Car will be mostly driven in the street with occasional drag racing. Any feedback from owners that have T78 OR 704R installed in their rx7`s ??
thanks for the info, this website has been great help for my rebuilt!!

thanks again guys!

 

I personally think the t04R spools faster than the t78.

 

TO4R cutback would be a good choice and have my vote.

 

I have a T78 and a halfbridge, i get full boost around 4500rpms.

http://s18.photobucket.com/albums/b1...ndgearpull.flv

This is an old video after Kan tuned it.

 

I loved my T04-R

Thing went nuts from 4K to redline, absolutely nuts.

 

Thanks for the help, I`m leaning for the T04R. I heard that the T78 is better for the top end but is laggy at first...is the T04R an HKS or Greddy ?

 

Im speaking about a Garret plain bearing T04-R, 1.00A/R

 

ZERO, why a t04r would be your choice versus the T78 ?? thank you.

 

My T78 seemed a bit laggy , that was until I picked up a Greddy RP exhaust. The
T78 spools up alot faster I say 38-4k

Nice turbo, with the 3row FMIC I expect to be 500-525 rwhp once I boost above 20psi.

 

to4z ftw

 

I'm running a to4 z and have run a pt67. I've played with all kinds of turbos
except the greddy and hks stuff... all the way to a 76mm monster. I will tell
you the to4r is incredible my second favorite behind my to4z[bbto4r]
I'm running a.81 undivided turbine housing at 21-22 psi and there is no
traction until 3rd gear. There is lots of torque as low as 3000rpm.

 

good stuff- info from people who actually used the product! lol....

 

On my race port motor I ran a T04r and it was awsome. Outrages power band. Full boost by about 3800 rpm on regular 360 thrust bearing.

 

i have a T04R on my S5 stock port motor running 15psi i made 385 WHP. i really love this turbo it spools fast for a stock port motor and never runs out of power. i hear it dosent even wake up till 17-20 psi!

 

what does this "cutback" mean? I know I'm not the only one to wonder...


Cant comment on choice since I've never driven/raced FDs with either of these.

 

They Are Basically Same Turbo. Spec Wise

 

id go with the one thats easier to find parts for in your area.
i have a greddy T78.

 

I have a T78 i love it full boost 3900 rpm.. go t78

 

I absolutely loved my T-78 set up. Very drivable, great pick up, not to much lag.

 

HKS used to market (maybe still does) their TO4R cutback, basically it was a TO4R with a clipped turbine in a .84 housing. So you got both response and still some flow up top.

 

I was actually disappointed with the response on my T04R.........

For how much larger the 42 is, it really doesn't spool that much slower than the T04R IMO

 

i got a brand new greddy t78 turbo kit for sale if you decide to go that route.. brandspanking new

 

so how much power have yall seen with the HKS to4r or garrett to4r on a ported or non ported 13brew?

 

Why not get a GT35R?

 

either that or a 500R