Motor Issue WOT 4000RPM

Reply Subscribe

Thread Tools

10-15-2016 | 06:00 AM

#11

phragle

Registered

Joined: Apr 2006

Posts: 10,042

Likes: 712

From: Toledo Oh

try a 23p

10-15-2016 | 12:29 PM

#12

Baja Rooster

Registered

Joined: Oct 2013

Posts: 2,888

Likes: 148

From: SF Bay Area

Quote:

Originally Posted by 88Rocket

used the factory wires for the distributor hmm I wonder.it has a cheap fuel pressure gauge that was on it when I got the boat If I remember it does drop when we were tuning it upbut don't remember how much . it has the stock block side fuel pump . you can see it in the pics I think.

I put a 502 crate motor in my 272 and could barely get it to 4800 with a 23p M+ and 50mph. I changed the 22g wire to my DUI to the required 12g, straightened out a small kink in the fuel line between the separator and fuel pump and got 5k with a 25p M+ and 58mph. Then I changed the secondary jets from 88 to 84 and and got another 500 RPM and 63mph. You may have improved hardware but the performance is all in the details.

10-17-2016 | 11:59 AM

#13

johnny b good

Registered

Joined: Aug 2005

Posts: 812

Likes: 1

From: Ray Twp. Michigan

I had an 89’ Sunsation Rocket with the stock 330hp 454 Q-jet and Bravo 1 drive, and that boat would do 62-63mph on gps. I can't remember the prop on it though.

10-20-2016 | 12:00 PM

#14

airjunky

Registered

Joined: Oct 2012

Posts: 1,332

Likes: 2

From: dfw texas

I have seen 049's with more chamber volume than some 188's and 088 mag heads .if you slap them on a block with flat top pistons its likely going to be sub par even with razor thin head gaskets