21 replies to this topic

[Bench Racer]

Where, why and how much?

I also use Marren Injector Service.

In previous posts there are noted points as to why one should have properly functioning injectors.

Tests they do:

Ohm test before, all 4 at 14.2

CC volume test before, 60.0, 57.6, 61.8, 61.5

Spray pattern before, ok, no good, ok, ok

Reverse cycle, dirty, dirty, dirty, dirty

CC volume test after, 60.0, 61.2, 60.6, 61.2

Spray pattern after ok, ok, ok, ok

Leakage test, ok, ok, ok, ok

IIRG $25.00 each (had an injector been beyond cleaning I would have procured another to make the set of 4.)

IIRC at the time Dave didn't have his tester.

Advanced Autosports most likely does the same.

 

If you were to Google fuel injector tests, the tests would all be shown including what the spray pattern looks like.

[Brandon]

Marren for me as well.  Not that I don't want to support Dave (Hi Dave!) but Marren is in CT so it's close to me for a quick turn-around.

 

Their prices run $25/injector for their inspection/testing/cleaning process and if they find one out of spec they swap it out for one that's matched with the others for ~$35 (I think - don't have the last invoice from them handy.).

 

So if you send in 4, have one borked and they swap it for another, you're looking at ~$150 to end up with a nice, balanced set of injectors.

 

From there, you spend some time on the dyno to get your AFRs spot-on using the adjustable FPR.

(too many TLAs?  ;-) )