Throttle body ???
 

Has anyone attempted to screw around with a larger throttle body on the VQ37VHR??

There was one member that bored his out. But I don't think he ever got back to us on results. Mods of this nature are really not going to do much. Stick with the basic.

Thanks!

im the one who did the mod and from a relatively quick test at the time , it did show a positive result.

I said in a same topic previous post , that I would redo the test in April with a before and after both tuned.
Im still planning for this , I just came back this morning from a Military exercice in Ft Irwing,California and I have 2 week off , I might manage to do it around the end.

Im even looking to do a modification in the near future to accept 2x DE Throttle body (people say they are anything between 68-70mm) instead of the 60mm on the OEM VHR throttle body

The OEM units on our cars are 60mm?

I tried to contact MaxBore.com about doing it and he said that it was possible but then never got back with me after.

It may be possible to bore the stock ones out for more airflow and then port match the runners on the intake manifold.

yup the VHR TB are 60mm each and I bored mine to 62.5mm
ofcourse it require a bigger butterfly plate and you will need to adjust the idle screw which is loctited very hard !!

I cant say anything about the intake manifold...

Isn't the intake manifold plastic? If the inlet on the manifold cannot be opened up, there is no point to a larger throttlebody.

the opening on the intake manifold is about 64mm
so a bored out TB does work fine

seems like it could be alot of work for minimal benefit.

are you still planning to do this?

I called yesterday for an appointment on the 28April :)

Good luck...

Mine's has High Flow Throttles body. They are 2.5mm wider then stock too.

the 2 I have have a higher flow than mines...:tup:

Did you enlarge the intake piping as well?

the inlet on the intake manifold is about 63-64mm

my CAI start at 3'' then has a reducer down to about 64mm at the MAF(cant rememeber exactly , then got back up to 2 3/4 at the Throtlte body''

it is a custom CAI that I had made 2 years ago