Intake manifold modifications

[shnazzle]

The power of the search feature;

I was just thinking if any high-end gains could be made on the 1zz by porting the intake ports. I know people have ported the throttle body but to me it always seemed a bit wasted if the intake wasn't accommodating of this extra flow.

From this topic it seems like the entire exercise is a bit pointless and possibly detrimental.

The only thinking that remains is whether I can port the intake and throttle body and adjust my tune a bit on the emanage.
The only prob is....do I really want to give up even more low down torque?

[Essex2Visuvesi]

In all seriousness tho, I guess it will depend on what you want.... like most other tuning, what gain in one area you will loose in another.  I's just down to wether the gains outweigh the losses

[The Other Stu]

[Anonymous]

The power of the search feature;

I was just thinking if any high-end gains could be made on the 1zz by porting the intake ports. I know people have ported the throttle body but to me it always seemed a bit wasted if the intake wasn't accommodating of this extra flow.

From this topic it seems like the entire exercise is a bit pointless and possibly detrimental.

The only thinking that remains is whether I can port the intake and throttle body and adjust my tune a bit on the emanage.
The only prob is....do I really want to give up even more low down torque?

Very little gain, however the big bore and increase in compression ratio made a very big difference. I never noticed the kick but the engine certainly pull hard.

[MilesH]

The power of the search feature;

I was just thinking if any high-end gains could be made on the 1zz by porting the intake ports. I know people have ported the throttle body but to me it always seemed a bit wasted if the intake wasn't accommodating of this extra flow.

From this topic it seems like the entire exercise is a bit pointless and possibly detrimental.

The only thinking that remains is whether I can port the intake and throttle body and adjust my tune a bit on the emanage.
The only probably is....do I really want to give up even more low down torque?

Very little gain, however the big bore and increase in compression ratio made a very big difference. I never noticed the kick but the engine certainly pull hard.

Could you explain exactly what you did to increase the compression ratio and by 'big bore' do you mean the throttle body?

[Anonymous]

Basically 2zz pistons with 1zz rods and crank, but using forged parts.

[ChrisGB]

Basically 2zz pistons with 1zz rods and crank, but using forged parts.

Didn't it work out at 1.93L?

[Anonymous]

Basically 2zz pistons with 1zz rods and crank, but using forged parts.

Didn't it work out at 1.93L?

Yep exactly. I know the 1zz to convert not cheap but it is surprising that you don't here people fitting the 1zz crank to gain some easy ponies.