well..

after installing the meth and tune i wanted to redyno the car to check the difference.


I am shocked. !!!!!!! i have to get the boost issue fixed. looking for Remote WAstegate pipe

with this amount of tourqe on a stock engine i guess am in the danger zone.


Low boost Map 6-7 psi /without Methanol :

spike to 9 psi and drops to 6-7 by redline.






highboost Map 9-10 psi / with methanol :


the problem am facing is the boost drop..

on the high boost run. one the max almost 4000RPM i hit 13 psi and keep on dropping till it reachs the 10-9 and even 8 psi by the redline.






thougths guys.

 

what were the #'s for us here at work that cant see hosted pics.

and yes, 13 to 8 is awful boost control.

 

look for the APS one or have one made.

 

Wow, thats a big spike. My TN kit was doing the same thing before I did the WG relocation. Fun to drive but I was always worried about blowing the engine. Since I did the relocation my boost held steady from 4k to redline.

 

389 whp
445 TQ

 

Wow, I just had a flashback to 2006.

 

overboost = kaaabooooommmm ....get that handled because ur numbers are whacked because of it

 

i called around to like every vendor on this forum this past summer and nobody has the external WG that aps used to make...i'd just have one custom made that's very similar to theirs.

 

has your boost always been doing this? is it consistently the same amount of spike and leak? what are you using to control boost? have you done a boost leak test?

 

 

The remote WG pipe will not fix this issue. There is too much back pressure in the manifold (pre-turbo). You will need to have a custom WG mounted on the crossover pipe. There is plenty of room. You will have the same problems with overboosting and spiking if you mount the WG at the turbo. Just block that off or change the exhaust housing to a standard 4 bolt.

 

thats a lot of TQ! be careful not to launch a rod out of the block

 

thats what am trying to do .. i am afraid now to even push the car.

i did the same, even today i had a call with APS australia. and they didnt even bother. there answer was: " we stopped making them.. make your own " !!!! WTF

Thanks... very supportive heheheh

but am i was thinking of fabricating something like APS remoute wastegate. and the wastegate is after the turbo.. !!!! what do you mean by saying mount the WG AT the turbo!!?? can you please elaborate.

thanks for the input.


i am even afraid to drive the car... i am driving it on the low boost map only.

 

so just to clarify; even with running it off its w/g spring pressure it spikes? like, bypass the boost controller and run just off of the w/g pressure, it does the same thing? correct?

 

yes...

but with the boost controller on . i can hold the boost lil less than its spiking.

example...

boost controller off... the boost spike is almost 15 psi then drops..
boost controller on... the boost spile is around 12-13 psi. and drops.
boost controller on... i can set it to very low psi. where the max spike is 9 psi but it will drop to 5-6 psi.. which is not what i want.

 

well, if this were me personally, i'd try just running a vacuum line from a pressure source to the wastegate. if still spikes then i'd figure out fabbing up a new style wastegate.

 

spikes as 15psi!?!?... jesus.. I would stay completely out of boost! until you get the issue sorted out

 

yeah




anyone with an APS external wastegate !!!!! plz share pics of your setup.

 

Yikes.

 

I haz one...mebbeh if it ever gets warm enough soon I'll take some pics..my boost (9 psi) spikes to 11 psi...but I usually look at the gauge and think of the consequences and let off the gas... lol