1.8 Injectors, 112 vs 102? |
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1.8 Injectors, 112 vs 102? |
StarBear |
Aug 19 2022, 08:46 AM
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#1
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Senior Member Group: Members Posts: 1,859 Joined: 2-September 09 From: NJ Member No.: 10,753 Region Association: North East States |
A bit of a mystery about a set of four 1.8L injectors compared to known info. Known is VW/Bosch part 022906301C/0028150112, with spec of 18.1 lbs/hr or 190.2 cc/min. See top of pic (blue module).
This other set (bottom of pic gray module) has same VW number but has Bosch number 0028150102 (not 112); Mr Injector test results show 200 cc/min. Looks same as known. Can find no reference for a Bosch injector ending in 102. Questions: 1. Might the second set just be stamped wrong or are older, being superseded by 112? 2. Any undesirable or unwanted results from flow slightly higher than spec? Would it run rich? Way out of my wheelhouse here, so community experience and wisdom much appreciated! |
Van B |
Aug 19 2022, 12:30 PM
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#2
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Senior Member Group: Members Posts: 1,582 Joined: 20-October 21 From: Maryland Member No.: 26,011 Region Association: None |
I guarantee you that your old injectors are not spraying evenly. My engine smoothed out so much with new flow matched injectors... made a little more power too.
Anyway, running a matched set is definitely the correct way. At worst you'll just need to trim fuel a bit. But remember that .9lbs/hr is max flow rate. Dynamic flow measurement allows you to match fueling curves at part throttle loads which is where your bigger flow difference is likely to be. When I had those 7 tested, one of the three that failed was spot on at max flow, but the curve was way low; meaning that cylinder would be lean as hell during regular driving. |
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