SoCal Jet Boats
Tech Talk => Jet Pumps => Topic started by: jamiemwedmore1234 on June 26, 2014, 12:05:40 PM
-
This is for a buddy's boat. Has a brand new A impeller new main bearing new shaft and a fresh 400 hp bbc boat only spins 3400 rpm thought a. A impeller was pretty standard it's a jc pump ans a 18 ' boat
Sent from my iPad using SoCal Jet Boats
-
3400 rpm seems a little low boat gps at 62 mph @ 3400rpm
Sent from my iPad using SoCal Jet Boats
-
This is for a buddy's boat. Has a brand new A impeller new main bearing new shaft and a fresh 400 hp bbc boat only spins 3400 rpm thought a. A impeller was pretty standard it's a jc pump ans a 18 ' boat
Sent from my iPad using SoCal Jet Boats
Not enough information, but doubting the 400HP thing.
Something is wayyyy off.
I have a small block Chevy that will turn that pump to 4200.
GT
Sent from my SGH-T989 using SoCal Jet Boats mobile app
-
I told him the same thing but from what I no it's a 468 with a 750 carb 34* timing open header large oval port heads I told him to hook up a diff rpm gauge
Sent from my iPad using SoCal Jet Boats
-
3400 rpm seems a little low boat gps at 62 mph @ 3400rpm
Sent from my iPad using SoCal Jet Boats
62 sounds about right but the 3400 RPM????..... I would verify the tach is correct......
-
Yes it was the tac rev it on the trailer and would only rev to 3500
Sent from my iPad using SoCal Jet Boats
-
I had the same problem, found it to be the stock ignition module, replaced it with a flame thrower module and that did the trick!
Sent from my iPhone using SoCalJetBoats mobile app
-
Mine wont turn over 4500 on my 396
Sent from my SCH-R960 using SoCal Jet Boats mobile app