zxrazorxz66

alright so when i was building my fd with a t88 i had a manifold that was available to me for really cheap.. (greddy tdo6-20g manifold for 100 bucks) anyway so i decided since the t88 had a t4 flange and the manifold had a t3 flange that i would just get an adapter so i did but it seems now that its all together it can only boost to 8-10 psi even with a properly set hks boost controller no my question is with this manifold design could it be restricting flow so significantly that it wont spool?



engine is stock ports

3 inch downpipe to 3.5 inch border racing burnout system

greddy type r wastegate

and hksboost controller.

mspec intercooler and greddy elbow with type rs bov

i am pulling 16-18 on my vacuum.boost gauge at idle so i dont think i have a leak as it doesnt search for a steady idle

also i can hear the turbocharger when i start to spool(its very loud)

so im also thinking maybe a lim leak?...

anyway let me know your thoughts.



thanks

matt

thatpoorguy

What rpm is it hitting 8-10 psi and keep in mind that's a massive turbo. What are your fuel mods?

fc3sboy1

tdo6-20g aint no small fry either. it may be a manifold issue but without seeing the car i cannot conferm. i run a custom manifold i built with my set up using a MT45 ( very close to a gt4292 journal bearings) my car on a ported RE spools to to 12psi , standard wg spring i have, to 24 psi with a manual boost controler no problem with no spikes or creep.



are you sure your boost controler and wg are operating properly?

zxrazorxz66

my fuel mods are 850 primarys and 1600 secondaries with kg parts rails and a 255lph walbro pump.. the rpm i was running was about 6400 and i phoned greddy and they said i had a 20 pound spring so the first time i set it up i set the evc for a base boost of the wastegate spring and that made 6 psi so then i dialed back the base boost setting to 12 psi and that made a slightly higher boost.. i dunno.. it seems alot faster then the stock system.. maybe i will just rip it apart and go twin sequential (one gt28 and one gt35r) hahaha ..

zxrazorxz66

excuse the rad and intercooler setup.. it was suppose to be vmount but the shop i took it to didnt listen so now i have to change it..

GreyGT-C

how are you running BELOW WG spring pressure? Something definitely isn't right with your set-up. Remove the boost control COMPLETELY and run a straight hose from the UIM to the WG and see what is happening. You have a I/C pipe/UIM/LIM leak happening, which i don't suspect because of the lack of idle issues.... OR you just might not have enough engine for that big *** turbo with your current mods.









on a side note... WTF is up with all of the RHD's lately??

zxrazorxz66

the only that is weird with the car is that it wont idle for the first like.. 1minute or so when cold.. but thats tunnning.. could i just turn the boost controller off?.. also would a incorrectly setup wastegate do this?.. say if one port was attached to the wrong source (even tho i checked the connections twice).. maybe its just stuck open.. anyone that wants to try and help in real time is more then welcome to add me on msn or xbox live



msn is zxrazorxz66@hotmail.com

xbox live is zXRazorXz

zxrazorxz66

so i did some research on wastegates and i figured out that you can preload the spring so maybe that is a option in this case?.. i will also try to boost with no boost controller

thatpoorguy

Try it with no controller but I still thinks it's just because you have a massive turbo and manifold. We have identical fuel setups but I'm using a gt35/40 hybrid turbo and I'm pulling more boost at a lower rpm. The reason it feels stronger than stock is because even though your pressure is about the same that massive hair dryer is pushing more volume to the engine than the tiny stock twins can.

zxrazorxz66

kk i will thanks poor guy .. i added you on xbox live as well