On3 Performance BMW 335i N54 Top Mount Single Turbo System – T4 Manfold
Upgrade - BMW-T4
There is only so much reading one will do before losing attention, here is
a few video clips from us strapping the car down and testing throughly
testing this turbo system. The video doesn’t do the car justice and it
sounds amazing. We are still testing with downpipe back factory exhaust.
Clearly we are leaving power on the table without upgrading that yet and
still making the numbers. Being that there is not any control currently
for our tuning to adjust timing, we have so much more potential in the
future with this car. Keep in mind we are on an entirely FACTORY fuel
system, 93oct fuel, no meth and all boost:
Here is a quick clip of the car doing a 40 roll on around 19psi, sounds
AMAZING!
Back to the details…
All customers looking are clearly going to be focus on power potential
clearly with this turbo system upgrade. Right now if you have a factory
stock 335, you can compare our numbers simply to what you would/can make
without other supporting fuel, trans, etc mods. We are sitting at just shy
of 17psi right now with the car and its starting to lean out so the factory
low pressure pump is only going to support roughly 480rwhp. We had to bow
out at this point although we are more than pleased with the power and the
level of boost currently running. We hope to work with a new tuning
software company, upgrade the fueling and go back for more testing. Our
target for this car is going to be around 525-550 wheel as thats going to
bring us to the limit of the factory transmission(automatic). This is also
an important point as we would be making slightly more power with a manual
transmission car so we are eating up a little power for those strictly
interested in power numbers.
Intercooler Technical DATA:
We initially base lined our test car with the factory intercooler at ~17psi
of boost. Since then, we upgraded the car to our new 7″ Core 335i
Intercooler and went back to the dyno for a few more pulls. Not surprised,
the IAT’s were down and from the start of the pull till the end, we are
only getting about a 10 degree rise. The pull was starting at ~100 degrees
F and ends right at 110 degrees F. This is a HUGE gain and by simply
keeping the temps cool going into the engine. We were down 1psi at 16# of
boost and making 40 MORE HP to the tires at 6100rpm. So if you are pushing
the stock turbos or on an upgraded turbo setup, this is a must have. We
do sell the intercooler upgrade by itself so check out the BMW section for
that specific upgrade if you are interested. Serious power potential and
keeps the IAT’s in check. This is included with your turbo system purchase
so your going to have the most efficient setup and coolest air charge temps
possible
Keep in mind with this car, its a completely stock 335i we started with,
there is zero upgrades and it is an AUTOMATIC transmission so our numbers
will be a little lower than a manual car(still making killer power). We
are running out of fuel so the stock low pressure pump needs upgraded if
making anymore power than this. We are more than satisfied with the system
and easily going to crack 500rwhp after the pump upgrade. That is the only
thing holding us back right now and this is on pump 93 oct fuel, 7 degrees
total timing!
Want to see the prototype car run, photos, and anything new? Follow us on
instagram, On3Performance is our user account, that is where all the sneak
peaks happen. We already have some other photos and video currently posted
