Yaris Intake Manifold

[kimo]

I think 1.3L and 1.5L are the same, only diffrent in piston size between them.
Maybe be better ask the dealer.

QUOTE=ZING;157953][/QUOTE]

[newyar]

Did these ever get produced? Any results, feedback from the first 10 customers?

[Tamago]

Originally Posted by richardholdener

Unfortunately we lost a rod while running higher boost levels and .

what kind of boost levels were you running and for how long? help the 1NZ community out

[richardholdener]

I am helping the community out by findin gout exactly what caused the probelm before jumping on the speculation bandwagon. The boost level did not hurt the motor nor the length of time spent at any given boost level. There had to be some type of ignition error that that resulted in excessive timing. We are looking into this and will report if we find the answer.

Originally Posted by Tamago

what kind of boost levels were you running and for how long? help the 1NZ community out

[Tamago]

Originally Posted by richardholdener

I am helping the community out by findin gout exactly what caused the probelm before jumping on the speculation bandwagon. The boost level did not hurt the motor nor the length of time spent at any given boost level. There had to be some type of ignition error that that resulted in excessive timing. We are looking into this and will report if we find the answer.

ok i guess that's a non answer ;) stock 1NZ rods break on fully stock xA/B's due to high RPM's for extended periods of time. toyota fixed this by giving you Yaris people taller gears (better highway cruising) ..

if you read the write-up done by elprototypes on boosting the 1NZ the rods are the first things to go. the engine is over-square and offset crank which causes piston slap (which is obviously made worse by boost) and ultimately rod failure. there is no "speculation bandwagon" on the 1NZ.. it's been around almost 10 years..

is this your first 1NZ vehicle, Richard?

[ROCKLAND TOYOTA]

Originally Posted by Tamago

ok i guess that's a non answer ;) stock 1NZ rods break on fully stock xA/B's due to high RPM's for extended periods of time. toyota fixed this by giving you Yaris people taller gears (better highway cruising) ..

if you read the write-up done by elprototypes on boosting the 1NZ the rods are the first things to go. the engine is over-square and offset crank which causes piston slap (which is obviously made worse by boost) and ultimately rod failure. there is no "speculation bandwagon" on the 1NZ.. it's been around almost 10 years..

is this your first 1NZ vehicle, Richard?

don't mind him, he's just our resident scion ass paper who thinks his knowledge is helpful.....

[Tamago]

Originally Posted by ROCKLAND TOYOTA

don't mind him, he's just our resident scion ass paper who thinks his knowledge is helpful.....

better than being ignorant like you

[richardholdener]

Thanks Rockland for the insight on the previous post regarding con rods-it is appreciated. Piston slap, offset crank pins-where do these guys come up with this stuff? I can remember when the light clicked on for me, the day that I realized that I didn't know everything and in fact knew very little. That is the day I officially started learning. Unfortunately, people put forth much more effort convincing others of their knowledge than actually obtaining it. For the record-Rod failure is caused by tension loads (rpm), extreme compression loads (detonation or extremely high power levels) or fatigue cycle life (extended operation near fatigue). Since none of the other situations were present-we must suspect detonation as the culprit, but will perform a post mortem to see if there is any evidence. The 1NZFE rods do not fail by design, neither did the Honda rods or small block Ford rods or any of the many powdered metal production rods-the culprit has almost always been a tuning error. There is a limit to the power production with the production rods, but since (in the case of this yaris) we were nowhere near that absolute power limit

Originally Posted by ROCKLAND TOYOTA

don't mind him, he's just our resident scion ass paper who thinks his knowledge is helpful.....

[dallas]

With previous dyno runs with bigger intake manifolds and throttle bodys without more displaement, more cam, or forced induction a higher flowing intake will offer very little gain and may loose h.p /torque until very high rpm.
What calculations are you using for runner diameter and length.

[richardholdener]

Is this question directed at me? The statement that a higher flowing intake will yield very little gain and may loose hp until high rpm is inaccurate. Intake manifolds are not simple flow devices-they are tuned to produce power at specific engine speeds based on the other variables you mentioned (displacement, cam timing etc...) It does not take a bigger or higher flowing intake to make more power, it takes the right design elements. The calculations are extremely complicated for more reasons than I can go into in such a short space. We ran over 100 different combinations before deciding on this one illustrated by the dyno curve provided. Intake design is more than just welding together a plenum, runners and flange.

Originally Posted by dallas

With previous dyno runs with bigger intake manifolds and throttle bodys without more displaement, more cam, or forced induction a higher flowing intake will offer very little gain and may loose h.p /torque until very high rpm.
What calculations are you using for runner diameter and length.

[richardholdener]

PS-The tuning effect works the same on NA and FI applications.

Originally Posted by dallas

With previous dyno runs with bigger intake manifolds and throttle bodys without more displaement, more cam, or forced induction a higher flowing intake will offer very little gain and may loose h.p /torque until very high rpm.
What calculations are you using for runner diameter and length.

[Nexus1155]

got any pictures? Did the rod just break, bearings/melted piston?.... The H22 i have overspun the bearing and it popped a nice hole in the block...

[cali yaris]

I think by speculation bandwagon, he meant he's not going to speculate about his particular car within the context of what caused the failure. It is interesting that his failed under less than extremely stressful conditions, while mine has not failed after six months of driving at 8psi without any tuning whatsoever.

So, whatever he finds out will be interesting. A pic of the rod would sure be entertaining, in the meantime.

[Nexus1155]

GENTLEMEN!!!! CUT THE SHIT

[Tamago]

Originally Posted by Nexus1155

GENTLEMEN!!!! CUT THE SHIT

i'm done..

i came here to ask richard H a legit question

Rockland started it ;)

[Nexus1155]

hahah sorry, but i had to intervene, don't want Richard taking away the manifolds

[richardholdener]

No worries about the intake situation--and I respect people having and voicing their opinion(this is what makes America great). I just wish they would not be so quick to draw absolute conclusions from such small samples (the equivalent of automotive bigotry). One or even two damaged con rods does not mean all NZFE rods are bad. Honda guys thought this too, but since I ran stock B16s in endurance racing where we ran 8200 rpm for 24 hours, not to mention producing over 500 hp in turbo form, I'd say the weak con rod theory was just that. FYI-Engine testing at the OEM level includes running the motor for 24 hour periods and ranging the engine speed from peak torque to peak horsepower. This is done at 1/4 throttle, 1/2 throttle, 3/4 throttle and then at WOT to endurance test the reciprocating assembly. I personally have run my Yaris in 4th gear from Vegas to So Cal and back (mileage testing for my book) and run it flat out 114 mph for almost 9 straight miles. This combined with the hundreds of dyno tests run to the rev limiter under WOT shows me that (as has been their history) Toyota over and not underbuilds their vehicles.

Originally Posted by Nexus1155

hahah sorry, but i had to intervene, don't want Richard taking away the manifolds

[Tamago]

Originally Posted by richardholdener

No worries about the intake situation--and I respect people having and voicing their opinion(this is what makes America great). I just wish they would not be so quick to draw absolute conclusions from such small samples (the equivalent of automotive bigotry). One or even two damaged con rods does not mean all NZFE rods are bad. Honda guys thought this too, but since I ran stock B16s in endurance racing where we ran 8200 rpm for 24 hours, not to mention producing over 500 hp in turbo form, I'd say the weak con rod theory was just that. FYI-Engine testing at the OEM level includes running the motor for 24 hour periods and ranging the engine speed from peak torque to peak horsepower. This is done at 1/4 throttle, 1/2 throttle, 3/4 throttle and then at WOT to endurance test the reciprocating assembly. I personally have run my Yaris in 4th gear from Vegas to So Cal and back (mileage testing for my book) and run it flat out 114 mph for almost 9 straight miles. This combined with the hundreds of dyno tests run to the rev limiter under WOT shows me that (as has been their history) Toyota over and not underbuilds their vehicles.

all that said, you threw a rod
i'm not bashing the 1nzfe. i love them so much i'm on number 2.