Brian C

I have a 2003 Sonic 260 with a 496ho & a Whipple Supercharger installed. Just wondering if anyone else has done this on there boat & what speeds that they are seeing. On GPS I am running 73mph. Does this seem right to you guys?

26sonic

I have a 1998 26 prowler with 502 and minor engine upgrades with bravo1 4 blade labbed 24 p and run 67-69 gps have hit 70 gps with 23p mirage plus labbed prop?

Prowler

how much boost are you running?what kinda prop?last years set-up i was around 70 at 4500 rpm's red lining at 6000 with 7 lbs of boost,that was with a labbed 28 bravo-1.

creeper

Prowler ,What set up are you running with your unit

Brian C

Prowler,
I am running 5lbs. boost? a 25p labbed hydro & turning 5200 rpms. What motor are you running?

GO4BROKE

iTrader: (1)

Sounds like you may be on the rev limiter. I would try a bigger prop, I would expect you to be faster than that.

Gofastboater45

Know of a guy with a 26 with a 502 mag w/procharger M3 If I remember correctly, standard boost level/pulley, running a 28 B1 and running low 80's in right conditions. He also ran a 28 hydro, but it would blow out alot, however a little faster on top end with the Hydro, holeshot was awful, as was midrange cruise.... in 2' chop it would blowout & fall off plane occasionally under 3000. With the B1 28, no more issues, in fact mid range cruise speed was up with the B1 over the hydro.

Prowler

i tried a hydro,still hanging on the wall,didn't like it,the prop felt heavy,thats a 29 pitch,spun that 5400 rpm's,best was either a labbed 27 3-blade,6200 rpm's i guess tach only goes to 6 and i was past that or a labbed 28 bravo-1,i don't think the prowlers like hydro's.do you have a boost gauge?i see you have a ? mark after 5 psi.last year i was running a innercooled 250 powercharger over the winter i put a 420 mega-blower on,the block is bored and balanced,heads flowed,bassett headers a couple of 850 holley's,full roller motor.Brian C you didn't say if your exhaust is stock or not,if your putting it in you have to get it out.

Prowler

i'm looking to get 90 mph out of it this year,almost there.

Brian C where ya go??????where do you boat?

Brian C

Prowler,
I do still have stock exhaust, Whipple said that stock exh. flows pretty well & to not worry about changing it. I am running 5lbs. of boost. I took it out this weekend just to besure that that number was right & it is. I do my boating on the Potomac River in VA. It sounds like your boat is the real deal. I would be happy with just running 80mph. What gear ratio are you running in your lower?