Hi can sp2 throttle body will fit into SP1 turnone airbox ?

The SP2 throttle bodies will fit with a T-O SP1 airbox.
You'll also need the mount rubbers for the throttle bodies to mount.
Plus the SP2 ECU.

However, the T-O SP1 airbox itself will not fit in an SP2 frame due to the added gussets near the steering head.
The T-O SP2 airbox will fit both models.

Tks sub, but can I use SP1 ECU?

Tks sub, but can I use SP1 ECU?

I can't recall if you can or not.
Of course it would be best if you use the SP2 ECU.

Are you trying to gain more top-end track speed with the swap?

Yup... Trying to get top end as I'm using 15/44 sprocket set up

If you want more top end speed, as I understand you, drop your rear sprocket back to the standard 40T.More engine power will get you there quicker, but the sprocket sizes dictates your top speed.

If you want more top end speed, as I understand you, drop your rear sprocket back to the standard 40T.More engine power will get you there quicker, but the sprocket sizes dictates your top speed.

I have tried it from stock till up by +2..
So far more fast pick up is +44, my setting..

Because im a bit abit confused on up grade to Sp2 throttle body..
someone told me it not necessary to use SP ECU if i have PC3..
IS it possible..

I have tried it from stock till up by +2..
So far more fast pick up is +44, my setting..

Because im a bit abit confused on up grade to Sp2 throttle body..
someone told me it not necessary to use SP ECU if i have PC3..
IS it possible..

That's why I was a bit guarded with my previous answer.

In theory the SP1 ECU use should be ok, since the Power Commander alters injector timing and should compensate for any differences between flow rates (if any) between the SP1 and SP2 injectors.

The fuel pressure is the same, so it may be possible there is no flow rate difference at all, just better atomization with the SP2 injectors.

All I can say is, give a try and see.
Just let us know what you find, for future reference.

I adapted SP2 injectors to fit into my SP1 without the SP2 ECU but using a power commander.It need a remap, but in the end there was no real power difference, it did seam to have smoother throttle responce, but I ended up switching back to SP1 injectors, just to keep it a SP1:)

I luv the size 15/44 sprocket. It's give a more acceleration.

There will be a trade off in top speed with 15/44 gearing,but as you say it will give very good accleration..My SP1 runs 15/40 gearing and I can redline it in top gear at a local track (just)