OVTune 3.5L Tacoma Supercharger and Twin Turbo Systems

which intercooler option would that be, the larger of the two I assume?

 

No, I don't plan to offer it this way. Too much risk of engine blowing.
Boost controller can only INCREASE boost past wategate pressure. It cannot decrease boost.
Baseline wastegate pressure is 9psi

Correct

 

Okay, I have a couple follow up questions then.
What psi is the Base kit good for on stock fueling?
And what is it good for with upgraded DI?

 

From Page 1 of this post i think this answers your questions, if not just ignore this. I don't know if he'll have info for how much boost you can push into each kit before you send a piston into the sky but I'm sure when vFTuner comes out someone will find out.

Kit:
https://www.ovtuned.com/products/ovtune-tacoma-3-5l-twin-turbocharger-kit
PowerMax Fuel System:
https://www.ovtuned.com/products/powermax-fuel-system

complete patch notes
- ovtune proprietary torque based control, overboost protection


- Kit components
- Twin OVTune 2GRFKS Turbo Manifolds
- Twin Garrett turbochargers (OE or powermax version)
- twin Downpipes that bolt to OEM Y Pipe
- nylon braided oil return lines
- stainless steel hard line coolant hoses
- coolant hose relocation kit
- intercooler
- intercooler piping
-intake system

-Fuel components
-Upgraded Direct injectors (Powermax required)
-Upgraded Port Injectors (Powermax high boost required)
-Upgraded In tank Fuel pump (required)



3.5L Tacoma Base Kit performance :
Torque increase over stock: 145-150%% (340~350 ft lbs)
Horsepower increase over stock: 120-125% (320-325HP)
Peak boost psi : 6.5 psi


3.5L PowerMax Twin Turbo kit Low boost:
Torque increase over stock (160-180%) As Tested ~ 400 ft lbs 2300 rpm
Horsepower increase over stock (150 - 160%) As Tested ~ 375 HP at 5200 rpm
Peak boost pressure 9.5 psi (stable, 2000 to 6000 rpm)


3.5L PowerMax Twin Turbo High Boost :
As tested : 520 ft lbs @ 2500 rpm
As tested : 464HP @ 5600 RPM
Peak boost pressure 21.5 psi ~ 17.5 @ 6000

 

Is the preorder already sold out?

I want on a list again. What do I need to do?
Do you want my kidney? I don't need it.

 

Id check back then but again lets wait till corona leaves before we bumrush OVTUNE with our life savings trying to get this TT

 

Not too long ago Mat did mention how much boost he believed each kit would be able to handle on the stock fuel system but things have progressively changed since then as he unfortunately encountered fueling issues and such. I just thought I’d ask again to make an informed decision before deciding on which kit, as well as maybe help answer this same question for someone else that maybe trying to decide between the base or the powermax.

 

Ya I'm in the same boat cause 340~ HP/TQ would be perfect but being able to increase it on the base kit turbos would be nice if I ever get board. Hopefully OVTUNE has a guess on how much boost we can put through each kit before we create our own rocket program.

 

With how much RnD he does and he has stated multiple times he is gonna push this 3.5l to the edge and play around and see what happens

 

Agreed..Would like to know where those safe limits are

 

Don’t think hes found a limit yet. Nothing has exploded lol

 

The Carnage pics are gonna be crazy.

 

Engine still hasnt blown on 20 psi.

Manifolds are being sent out for 3D scans friday, and prototype casting by the end of April will be done.

Manifolds will be investment cast stainless steel.
I've got some pictures of various part locations on the truck I'll be uploading as well. Very happy with how is has turned out, and will be finishing intake design while manifolds are cast.


Overall the truck is running very good. I've tested on dirt, grass, street, 4H, 4L, 2wheel.. no problems under any conditions.


The transmission tune is really cool with this setup the way it responds and generates boost.
So in 5th gear, at 2000 RPM you can generate full boost (With base wastegate pressure of 9psi I see around 11-12psi at this rpm, tapering down back to 9~10psi)
BUT once this boost is generated @ around 50% throttle the torque converter will lock and RPM will drop down to ~1500-1600 RPM while still maintaining full boost.

6th gear as well, 4th, 3rd, etc.

The powermax turbos spool faster on the street than they do testing on the dyno (load).


During cruise driving at part throttle you can generate about 3-5psi without leaving 14.7 AFR and the truck will cruise nicely at low rpm, around 1100 rpm and 3-5psi.


as far as breaking the tires loose...no matter what I try the truck won't break all 4 tires loose in 4H on the street. There is no slip, torque converter remains locked, but it just wont spin them fronts.

 

I have not, but I have also not seen any trans temp hot issues, or CELs regarding the transmission, etc. the other day I tested for about 3 hours straight just back to back WOT pulls dialing in fuel and transmission while in 4H. So far the transmission has put up with the abuse much better than I expected it would.


I'm kind of shocked nothing has broken so far. Tuning this has been....a challenge, and usually when you lean out at 15+psi on a high compression motor something breaks. I have had dozens and dozens of full boost lean out situations while figuring out, and tuning the fuel.

When this engine does knock though at full boost the detonation is LOUD and nasty.

so yea even having nasty detonation at 5000 rpm near peak HP during tuning... she's still running.

 

What would be the advantage of the powermax low boost kit over the base kit with the DI upgrade and it turned up to 10psi? Seems they’ll be in the same ballpark with respect to power, but the base setup will be >1k cheaper?

 

The base kit is going to have boost taper at higher rpm so you will not have as much high end.

 

Less power at the same psi

 

I do remember that. I assumed that would be solved with the new fuel pump and DIs. I think it tapered because of old fueling issues