Injector Question
Thread Starter
Racer
Joined: Sep 2005
Posts: 498
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From: Rockville/Abington MD & PA
Injector Question
Anyone ever use Marren injectors? Im thinking about gettin a set but, I don't have any experience with them. Are they easy to tune with and a quality product?
Advanced
Joined: Nov 2001
Posts: 63
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From: Lawrenceville GA
They are..
Originally Posted by dwalker011
Anyone ever use Marren injectors? Im thinking about gettin a set but, I don't have any experience with them. Are they easy to tune with and a quality product?
From the info I've seen, Marren does a good job.
Injectors sold by many vendors are sets that are just put together off the shelf. The problem[s] arise when the individual injs are not of the same flow values, have poor spray patterns, leak, etc.
The sets that are "flow matched" are easier to tune, and should they become a problem, can be replaced with an inj of equal flow...
I've done alot of inj work, and have seen the"good, bad & the ugly". I would not recommend buying a set that is not flow tested, and accompanied by the test results... But, then that's just my $.02..
Last edited by Old geezer; Jul 7, 2006 at 10:51 AM.
Thread Starter
Racer
Joined: Sep 2005
Posts: 498
Likes: 0
From: Rockville/Abington MD & PA
Originally Posted by Old geezer
Likely a set of commonly available injectors that Marren Motorsports has flow tested, and matched as a set.
From the info I've seen, Marren does a good job.
Injectors sold by many vendors are sets that are just put together off the shelf. The problem[s] arise when the individual injs are not of the same flow values, have poor spray patterns, leak, etc.
The sets that are "flow matched" are easier to tune, and should they become a problem, can be replaced with an inj of equal flow...
I've done alot of inj work, and have seen the"good, bad & the ugly". I would not recommend buying a set that is not flow tested, and accompanied by the test results... But, then that's just my $.02..
From the info I've seen, Marren does a good job.
Injectors sold by many vendors are sets that are just put together off the shelf. The problem[s] arise when the individual injs are not of the same flow values, have poor spray patterns, leak, etc.
The sets that are "flow matched" are easier to tune, and should they become a problem, can be replaced with an inj of equal flow...
I've done alot of inj work, and have seen the"good, bad & the ugly". I would not recommend buying a set that is not flow tested, and accompanied by the test results... But, then that's just my $.02..
Advanced
Joined: Nov 2001
Posts: 63
Likes: 0
From: Lawrenceville GA
The design..
Originally Posted by dwalker011
Very good point. I remember reading a comparison somewhere, maybe on this forum that, a guy was selling his 60lb injectors to get a set of Motron 60lb injectors because they were easier to tune with. Now, an injector is an injector. It doesn't have a brain of its own so, why would one injector be more difficult to tune than the another?
IE: The old, "009" [green stripe] injector had a flow rate that was not the best, at low DC.. It was known to be "rich", and had some problems with clean idle.
The spray patterns are different, depending on the injector design, and flow rate.
IE: The "218" Bosch has a pintle design, and a cone shaped spray. [TurboBuick application.]
The original ACCEL, [made by Ram] were not close to the rated flow, had poor patterns, and have since been totally redesigned. [Last set I had in stock, were thrown in the trash!].
The Rochester inj can/will shut off at elevated op pressures.
The stock injs in the LS1 engines, used in the ASA stock cars are one of the best I've flowed. [They were flow matched at LPE, as I recall] They were "dead on", regardless of how many times they were cleaned and flowed.
The Moto's are a great injector! I have them in my 530" HEMI. A flow matched set.. All are within 1%..
Flow rate has a direct effect on pattern.. 19PPH in a 5.0 Fird, has a near mist pattern. The FMS 160PPH looks like a firehose!
BIG injs, at low Dc's can be a hassle to tune..
Thread Starter
Racer
Joined: Sep 2005
Posts: 498
Likes: 0
From: Rockville/Abington MD & PA
Originally Posted by Old geezer
Has a direct impact on the injector performance.
IE: The old, "009" [green stripe] injector had a flow rate that was not the best, at low DC.. It was known to be "rich", and had some problems with clean idle.
The spray patterns are different, depending on the injector design, and flow rate.
IE: The "218" Bosch has a pintle design, and a cone shaped spray. [TurboBuick application.]
The original ACCEL, [made by Ram] were not close to the rated flow, had poor patterns, and have since been totally redesigned. [Last set I had in stock, were thrown in the trash!].
The Rochester inj can/will shut off at elevated op pressures.
The stock injs in the LS1 engines, used in the ASA stock cars are one of the best I've flowed. [They were flow matched at LPE, as I recall] They were "dead on", regardless of how many times they were cleaned and flowed.
The Moto's are a great injector! I have them in my 530" HEMI. A flow matched set.. All are within 1%..
Flow rate has a direct effect on pattern.. 19PPH in a 5.0 Fird, has a near mist pattern. The FMS 160PPH looks like a firehose!
BIG injs, at low Dc's can be a hassle to tune..
IE: The old, "009" [green stripe] injector had a flow rate that was not the best, at low DC.. It was known to be "rich", and had some problems with clean idle.
The spray patterns are different, depending on the injector design, and flow rate.
IE: The "218" Bosch has a pintle design, and a cone shaped spray. [TurboBuick application.]
The original ACCEL, [made by Ram] were not close to the rated flow, had poor patterns, and have since been totally redesigned. [Last set I had in stock, were thrown in the trash!].
The Rochester inj can/will shut off at elevated op pressures.
The stock injs in the LS1 engines, used in the ASA stock cars are one of the best I've flowed. [They were flow matched at LPE, as I recall] They were "dead on", regardless of how many times they were cleaned and flowed.
The Moto's are a great injector! I have them in my 530" HEMI. A flow matched set.. All are within 1%..
Flow rate has a direct effect on pattern.. 19PPH in a 5.0 Fird, has a near mist pattern. The FMS 160PPH looks like a firehose!
BIG injs, at low Dc's can be a hassle to tune..
Last edited by dwalker011; Jul 7, 2006 at 12:43 PM.
Advanced
Joined: Nov 2001
Posts: 63
Likes: 0
From: Lawrenceville GA
I'd think..
Originally Posted by dwalker011
Wow, you really know your injectors. Do you happen to like the Marren 72lb low impedance injectors. Is there going to be a problem with these since they are low impedance. I plan on tuning with HP tuners or LS1 edit and not a standalone.
72# injs will support quite a bit of "steam"...
Advanced
Joined: Nov 2001
Posts: 63
Likes: 0
From: Lawrenceville GA
If...
Originally Posted by dwalker011
No, these injectors are for sale on another forum by an admin. Since these are low impedance, will this affect anything?
I was just talking to another tuner. He's of the same opinion, and said that he thot someone makes an adapter system, to use the stock ECM, and lo Z injs. I've seen it mentioned, but don't know where. Maybe someone here can post that info..
Last edited by Old geezer; Jul 7, 2006 at 04:40 PM.
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