porting throttle body and intake manifold

[just2asian]

I was wonderin i got a gen3 3vz. Anyone know if porting the throttle body and intake manifold will give me any noticible hp increase?

[ag6286]

u cant port the intake chamber more than it is and thers not much to port on the intake manifold, but it can be done, i kno.....mine is along with throttle body.....as for noticable diff, dunno YET, im still breaking in teh new engine

[terrastrife]

as long as its done good, you should make some kind of increase.

[ag6286]

Originally Posted by terrastrife

as long as its done good, you should make some kind of increase.

true, but since thers so little to actually port in these areas whether its truly noticeable in everyday use (and not "noticeable" merely by power of suggestion) or not is questionable in my book. While ur in ther u might as well do the heads, thats wer a lot of flow is decreased because of how small (atleast so im told by my friend who took the time to port mine) they are ported for feul economy.

[CamryPunk]

To port all that stuff will cost a lot of money. Think about the dollar to horsepower ratio. Probably cost $150 per horsepower. Is it worth it? Not likely. Save your money on some REAL power adders. In your case, I would get nitrous.

[terrastrife]

nitrous is the first and only 'real power' option really :P

[Pineapple]

Porting / polishing the TB and intake manifold won't do much.
Port and polish the head with multiangle valve job first. Let the shop port match the head to the intake manifold and match manifold to throttle body.

[ag6286]

^^^ been ther done that

u never actually told us whether u would be doing it urself or spending the big bux....that makes the diff. here........if u spending....dont pay for this job, DIY and it will pay off only

[just2asian]

yea, i was gonna do the job myself. one of my buddies did his exhaust manifold, of course on a turbo car, he did a nice job, so he was gonna help out. I definitly, wasn't plannin on spendin money on that

[Toysrme]

MRM - Mass Reply Mode

Anyone know if porting the throttle body and intake manifold will give me any noticible hp

Yes you can, no it won't give you anything measurable.

u cant port the intake chamber more than it is

Funny... When I ported my intake manifold, It was 2lbs lighter... That's a lot of aluminum.

thats wer a lot of flow is decreased because of how small... they are ported

Your friend doesn't know much... Mine are SMALLER than stock, on stock cams and I picked up a huge amount of flow.

...they are ported for feul economy.

No, there is economy involved - the economy of cheaply casting them in sand and not cleaning them up.

If Toyota wanted it to be more economical, they would have used cam profiles like the MZ's that have 1/3-1/2 the power at low revs, and thus - use less fuel.

To port all that stuff will cost a lot of money.

Dremel, flexible drive shaft, $5 worth of grinding stones. - Everyone has that.

Probably cost $150 per horsepower.

More like $10-$35 per horsepower. Maybe 3-5 *peak* horsepower gain from it.

Port and polish the head with multiangle valve job first.

The valve job is the #2 least important thing to do in porting as long as the valves, and valve face are properly cleaned before reinstalling.

Let the shop port match the head to the intake manifold and match manifold to throttle body.

Port matching is the most useless crap of all time.

DIY and it will pay off only

Agreed - It's not worth it to DIY head porting unless you're changing valve parts / timing belt / head gasket. For the IM / TB, it's not worth it to pay someone else to do it.









Anyone that said it wouldn't do much, I agree with.