Marine Intake is on and running.

[Fast355]

http://www.youtube.com/watch?v=N2qH75oYnyMBasically

Starting a new thread with a question from the last post of another.

That intake looks great. Mine was painted Mercruiser red all over. Good luck with your retrofit.

If you are planning on using the stock injectors, I had a set flowed and they came out at 25 lb/hr at 43.5 psi. Comes out to 28.9 lb/hr at 58 psi (4BAR) which is the pressure the marine regulator outputs with with the vaccuum reference unplugged. Plugged in pressure comes down to around 52psi.

peace
Hog

Hog are you sure that those injectors come in all Marine intakes. I picked up so much airflow through the MAF its retarded my timing to 22° at WOT but thats not the biggest issue. Even using your flow value I am running 10:1 air/fuel ratio at WOT and my long term fuel trims are around -15%. Either I was tuning around a massive vacuum leak before or now have larger injectors than your intake came with. Fuel pressure rises to 60 psi with the KOEO.

[Hog]

Not 100% sure. #280 150 081 is what my intake came with. They are the same as about 8-10 marine intakes that a buddy had at one time.

Your KOEO sounds about right. The injector report I am staring at for the injectors is 25 lb/hr at a 43.5 psi.

Hmm.

peace
Hog

[Fast355]

Not 100% sure. #280 150 081 is what my intake came with. They are the same as about 8-10 marine intakes that a buddy had at one time.

Your KOEO sounds about right. The injector report I am staring at for the injectors is 25 lb/hr at a 43.5 psi.

Hmm.

peace
Hog

My intake came off of a 6.2 MPI so perhaps that is the difference. It was also returnless initially.

[Hog]

I'm getting the same p/n on the injectors across the 5.0/5.7/377/6.2 on the cross ram L31 look aike marine intakes.

here is the list

350 MAG MPI ALPHA/BRAVO

350 MAG MPI ALPHA/BRAVO EC

350 MAG MPI HORIZON ALPHA/BRAVO

350 MAG MPI HORIZON ALPHA/BRAVO EC

350 MAG MPI HORIZON MIE

350 MAG MPI MIE

350 MAG MPI SKI

377 MAG MPI BRAVO

377 MAG MPI BRAVO EC

4.3L MPI ALPHA/BRAVO

4.3L MPI ALPHA/BRAVO EC

5.0L MPI ALPHA/BRAVO

5.0L MPI ALPHA/BRAVO EC

5.7L MPI HORIZON MIE

5.7L MPI MIE

5.7L MPI MIE EC

5.7L MPI SKI

5.7L MPI TOWSPORT WITH GEN III

5.7L SKI EC

6.2L MPI HORIZON MIE

6.2L MPI MIE

6.2L MPI MIE EC

MX 6.2L MPI BRAVO

MX 6.2L MPI HORIZON BRAVO

MX 6.2L MPI HORIZON MIE

MX 6.2L MPI MIE p/n 879312003 is the common injector. Same regulator is listed as well. peace Hog

[Hog]

You are using the injectors in your pictures correct? EV6/USCAR connectors.
Like these?


Only way to know for sure is next time you pull one out, take note of the part number;0-280 150 081 are 25 lb/hr@ 43.5 or 28.9lb/hr@58psi or 29.4 lb/hr@60psi.

Which t-body did you use? A Vortec truck, or marine T-body. If you use a truck T-body a gasket must be used. I 1st installed it incorrectly and had a massive vaccuum leak.

Are you using the marine IAT/MAP combo sensor?

peace
Hog

[Fast355]

You are using the injectors in your pictures correct? EV6/USCAR connectors.
Like these?


Only way to know for sure is next time you pull one out, take note of the part number;0-280 150 081 are 25 lb/hr@ 43.5 or 28.9lb/hr@58psi or 29.4 lb/hr@60psi.

Which t-body did you use? A Vortec truck, or marine T-body. If you use a truck T-body a gasket must be used. I 1st installed it incorrectly and had a massive vaccuum leak.

Are you using the marine IAT/MAP combo sensor?

peace
Hog

Yea the ones I am running are EV6/USCAR but they have a red band at the bottem, unlike the ones I have seen on the marine setups. I guess I need to pull the dog house and get some numbers soon.

I am running a CFM Tech bored truck throttle body with a 454 Vortec Gasket.

I am running the marine IAT/MAP sensor since I got a connector with my intake. The MAP seems to read perfectly.

[97Z71]

Can anyone give me some info on where to get the marine intake manifold that comes with injectors, fuel rails and the injector harness??Thanks in advance

[1project2many]

They're getting fewer and farther between these days. Watch Ebay and Craigslist, ask around at marinas for boats going to salvage, and just be patient.

There are aftermarket automotive manifolds that will work in many applications.

[97Z71]

I found one in Michigan. But it's just a bare intake. No fuel rails, injectors or harness. That's the main thing I'd like to find is the harness

[Fast355]

I found one in Michigan. But it's just a bare intake. No fuel rails, injectors or harness. That's the main thing I'd like to find is the harness

The Marine harness is not going to help you much if you are swapping over a L31 truck. Its easiest to raid the matching connectors as pigtails in the salvage yard, cut the connector off and solder on the longer pigtails.

[ZQ8 Blazer]

Hey Fast355. Delete some of your pm's. I have one to send you. Thanks.