Other than the Obvious 25hp what is the difference between the 500efi & the 525efi? are the rotating assemblies the same? Heads? Cam? I'm sure Mr Young Knows

Quite a few differences. The short block is essentially the same, but that's about it. The 525 has alum. Edelbrock heads and the 500 has cast iron. The camshafts are different. The 500 has Etop headers and the 525 uses the sweeper style Sport Tubes. The 525 is close cooled. The 500 uses a Mefi 3 ecm, where as the 525 has a Motorola 555 controller. If you install the Whipple on a 525, you need to remove the 555 and install the Mefi 4 ecm and harness that comes with the kit. You also have to install a distributor, coil and plug wires, since the 525 is a DIS (distributorless ignition system). The 500 already has a distributor, coil, etc. That is the biggest reason that the 525 Whipple kit is so much more than other kits. You have to add the ecm, harness, dist., coil, plug wires, sensors, etc. That all adds a couple grand to the kit. It is still worth every penny.
Eddie

I call BS on this post. I for one (of many) am a satisfied customer and have other options at my disposal. Care to elaborate on your first post?

28 ft Magic, twin step hull, 1237 hp on the dyno with all accessories, and wet headers, SCX upper, SC lower, 1.34 gear, stock drive possition, 2" shortie, stock 34 bravo prop, 6120 rpm, 8% slip... you do the math.

The boat is in our shop right now getting the rear hatch done in order to cover the motor, I will take some pictures. The only misshap with this boat so far, is that it keeps shredding the front bimini cover when doing high speed testing.

Chris

I don't get on here and post much at all, but I did do a lot of research here and elsewhere before any dealings with Ray. I couldn't find anything bad about him until I had my first problem. I just wanted to let him know that there are problems with Rays motors and kits, somehow Ray just keeps them quiet.

He is a great salesman, but in my experience you shouldn't believe everything he tells you. I couldn't find anything on the internet, but if you call around you will definately find people that don't have such a high opinion of Raylar.

I'll give you all the details in a post of it's own at a later date.

I guess I have been a member for 3 years and haven't posted, but I didn't register to post this.

Here you go 525 EFI with 6 PSI 3.3 whipple, 790 HP at 789 TQ.

sound good dont they..

I bet these numbers were @ 5200 rpm?? LET ME KNOW?

I sure miss the open exhaust on my 525's.