12 replies to this topic

[dkyk25]

just curious, i get the "cleaning" part but what is "balancing" the FIs?

[RARECRX]

making sure they all have an equal spray pattern.

[firstgencrx]

I like to use these guys up in Bothell Washinton:

WitchHunter Performance
22833 Bothell-Evt Hwy #1221
Bothell, Washington 98021

WitchHunter Performance

They have really fast turn times and their prices are good. They also print out a performance test of before and after they service the injector. Very cool.

David

[tom91ita]

i sent in 8 to:

http://www.cruzinper...om/fuelinj.html

and was very impressed with the service.

marren is also very professional.

after looking at the readout and flow of the 8, i balanced them by picking the 4 that were closest.

some places that used to "balance" would mix and match injectors and you did not necessarily get back the ones you had sent in. the bigger the pool that you have, the closer you can be to 0.1%, etc. not sure if anyone is still doing that.

my injectors were cleaned last summer and i was still able to go on line at cruzin and see the summary of my injectors. the formatting is not transferring that great but you get the idea:

Preliminary Test Results
Test pressure = 43.5 psi Injector No.
1 2 3 4 5 6 7 8
Test 1. Injector Resistance 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2
Test 2. Leak Down Test (Pass / Fail) P P P P P P P P
Test 3. Spray Pattern (Good / Fair / Poor) G G G G G F F F
Test 4. 90 Second Pulsed Flow Delivery (mL) 81 80 81 81 80 77 78 76
Test 5. 100mL Pulsed Volume 99 99 100 100 98 95 96 93
Test 6. 20 Second Static Flow (mL) 76 75 77 77 75 72 73 72
Test 7. 100mL Static Flow 99 97 100 100 97 94 94 93

Test Results After Service
Test pressure = 43.5 psi Injector No.
1 2 3 4 5 6 7 8
Test 1. Leak Down Test (Pass / Fail) P P P P P P P P
Test 2. Spray Pattern (Good / Fair / Poor) G G G G G G G G
Test 3. 90 Second Pulsed Flow Delivery (mL) 86 85 86 86 87 87 89 86
Test 4. 100mL Pulsed Volume 97 96 97 97 97 98 100 97
Test 5. 20 Second Static Flow (mL) 77 76 77 77 77 78 78 77
Test 6. 100mL Static Flow 99 98 99 99 99 100 100 99

i put together 4 of the 99's and used them and the others are trackside spares.

tom

[Vicious]

how much does it cost?

[Greg Gauper]

RC Engineering charges around $25 per injector plus shipping. Approx. 1 week turn around.

[Madkore]

A Little Known Fact.

RC Engineering has done work for Factory Honda.

Many years ago, when I had my Throttle Body bored by Russ Collins (The RC in RC Engineering), he had Two Acura NSX's at his shop that he was modifying for Factory Honda.

Madkore

[firstgencrx]

how much does it cost?

The last time I used WitchHunter, they charged me $60. I think their rates have gone up to $17 per injector.

[kenny86si]

ok so do you have the injectors cleaned and balanced only for racing? This wouldnt help anything for the average spirited driver would it. Honestly Ive never heard of anyone doing this before until this post.

[Greg Gauper]

It depends...

If your injectors are dirty/clogged with poor spray pattern, you will see/feel an improvement in performance and/or gas mileage with cleaner injectors, primarily at idle/part throttle driving.

Balancing/flow matching is more critical on a racecar, where you are spending alot of time at WOT. If one injector isn't putting out the same flow as the other three, you could run the risk of running lean on that cylinder. Not such an issue for a street car with occasional sprited driving.

[DEIVIONCRX]

Ballancing involves making sure the injectors are within 2-5% cc wise. The cleaning part is what makes them spray a good pattern again. I cleaned many many injectors in VoTech. But ballancing is a pain, making sure they all Spray 240cc's or within 2-3% to be good, and 3-5% is acceptable.

Anybody can gain from a good set of cleaned and ballanced injectors. The spray will be alot better thus better atomization, so more power. And ballancing them will give you more even power across the cylinders.

RC Injectors that they sell are Honda injectors just opened up and reworked, I dont like them because all they do basicly is drill out the hole in the bottom and change out the insides so they will handle more duty cycle.

Id recoment Deatschwerks they are here in oklahoma, and i know almost all the guys that work there and there good people.
http://www.deatschwerks.com/catalog/

[cbstdscott]

I am another happy customer for RC Engineering. They ahve done a couple of sets of injectors for me and I will go back again. And I am lucky enough to be sporting a RC Engineering TB (66mm) and intake plenum on my EW.

Something to note: A cleaned and balanced set of stock injectors with only a few extra PSI of fuel pressure is all you need ofr most modified EW engines. Integra injectors are too rich for anything less than a boosted engine.

Scott

[strudel]

This is the witchhunter page for all you need to know. $17.00/injector. JS