"Parmas" Motor

[cali yaris]

.4mm is .0157 inches. Mine were gapped at .028 and we brought that down to .024 when tuning on the dyno. I think your gap is very tight!

A/F on my car:
Idle: 14.1-14.7
Cruising: 13.0 - 13.5 is the range I've seen, more or less
under boost: 12.5 down to 11.7 at full boost, depends on load etc.

hope that helps.

[cali yaris]

Also, since I am considering replacing the injectors to above 600cc, does the engine will startup up rich or lean with a fuel map tune on 340cc inj?

you'll be under 5% duty cycle at idle, so could be a little rich, might need more tuning all around. Overall though, your management should maintain correct A/F.

[Blown_xa]

yes when I mean "should work fine", i mean as long as your fuel management can handle the increased size. The injectors themselves will drop right in. Same denso casing as factory. Depending on your projected whp choose between the 550's and 750's. Im thinking 550's would be plenty considering you have a return set-up.

[Parmas]

Originally Posted by cali yaris

.4mm is .0157 inches. Mine were gapped at .028 and we brought that down to .024 when tuning on the dyno. I think your gap is very tight!

A/F on my car:
Idle: 14.1-14.7
Cruising: 13.0 - 13.5 is the range I've seen, more or less
under boost: 12.5 down to 11.7 at full boost, depends on load etc.

hope that helps.

What Brand are the plugs? Thus this gap difference might be related to octane difference? I am running 90 octane so sure your fuel ignites better so thats what might the gap serve for!

Thanks for that afr reading garm, I never seen 12s on either level! BTW you are sure that these readings are good for lower octane level fuel?

What do you think about the TC injectors Garm? Do you recommend these for my setup? Is there anyone using them on his motor?

[Blown_xa]

the tC injectors (factory) would be ok for low boost. I was not able to get past 149whp with them as they maxed out. Seeing as you have a return set up im thinking they can put out more juice.

As far as AFR ratio and octane rating, timing is what is most important to optimize power and to prevent knock/detonation. The only way to optimize timing is on the dyno though. AFR should be targeted the same regardless of octane rating.

We tuned 2 customers tC's for 400whp, one with 91 octane (what was readily availible to that customer) and one with 93 octane. AFR were the same, timing is what has to be adjusted(less timing for 91)

[Parmas]

I don't know how much do you mean by low boost but since I built the engine it's none sense to stay low boosted!

I am projecting 16psi on a Garret T28 though!

[Blown_xa]

Originally Posted by Parmas

I don't know how much do you mean by low boost but since I built the engine it's none sense to stay low boosted!

I am projecting 16psi on a Garret T28 though!

oh yea factory tC injectors would be way too small. 550's would be good

[changchewsoon]

Hi Parmas,

Just want to share with you that I purchased a set of 445cc customized injectors from FIC for my rebuilt next month, but I can't tell you whether they'll work great until its in.

Am already thinking they might be too small as I'm not converting to a return setup? :(

[90tsi]

this may sound out there but there was an article in turbo mag a year or 2 back and it had an equation that you could use. dont quote me exactly but if i remember right you could plug in displacement,horsepower goal, and a few other factors and it would get you a good estimate of what cc injector you needed.

[Parmas]

Originally Posted by changchewsoon

Hi Parmas,

Just want to share with you that I purchased a set of 445cc customized injectors from FIC for my rebuilt next month, but I can't tell you whether they'll work great until its in.

Am already thinking they might be too small as I'm not converting to a return setup? :(

Mine are 340cc with a return setup running rich at all times @ 10psi. So the 445cc should work fine till 250BHP.

[Parmas]

Finally we decided what injectors will suit best and we chose the Siemens Deka 4 630cc.

These injectors flow 220 lbs/hr at 43.5 PSI ( 3 BAR ) and more at higher PSI! These units are low-impedance and require peak and hold injector drivers or additional resistors for saturation drivers. Despite the high flow rate, they are linear and controllable at low pulse widths compared to other extreme flow injectors! These injectors are sometimes referred to as 212lb/hr or 225lb/hr injectors

Any has experience on these?

[schleppy]

Originally Posted by Parmas

Finally we decided what injectors will suit best and we chose the Siemens Deka 4 630cc.

These injectors flow 220 lbs/hr at 43.5 PSI ( 3 BAR ) and more at higher PSI! These units are low-impedance and require peak and hold injector drivers or additional resistors for saturation drivers. Despite the high flow rate, they are linear and controllable at low pulse widths compared to other extreme flow injectors! These injectors are sometimes referred to as 212lb/hr or 225lb/hr injectors

Any has experience on these?

If I remember correctly, these injectors were pretty popular with WRX guys.

[Parmas]

Well that's good news since that increase the probability of being ones of the very best racing injectors one could own.

I hope they are efficient as advertised as these will probably be a good indeed upgrade. Bye Bye tuning probs :)

[Parmas]

Some pictures of the rear mounting. Sorry about the blured image but the camera sucks at close ups!

[Parmas]

UPDATES:

UPGRADED INTERCOOLER HOSES TO SAMCO RED :)

SHOWING CUSTOM BLUE WATER HOSES ASWELL

TRD CAP

[cali yaris]

cool, very colorful -- what throttle body is that?

[Parmas]

Originally Posted by cali yaris

cool, very colorful -- what throttle body is that?

Stock 1NZ one

What do you think about the rear mounting I posted before garm?

[yaris-me]

Sexy engine! You need a pink dip stick to set it off!