Wildman. We started out with a set of 415 hp EFIs. We started to go back stock and Ron thought those would turn out to be somewhere around 425 or so just rebuilding just like they were. I wanted to get a little something more out of them. Ron said we will bore them a little bigger pistons a little more cam and the headers of coarse. I can't forget those. The stinking manifolds are what got us here in the first place. I can't believe they were still running even but they were still doing that. I guess I'm lucky I didn't mess more up than I did. I'm about to put up the pictures of what we found when we tore into them in a few minutes. But to answer your question.500hp each or maybe just a little more if possible is what we are shooting for. Anyhow Ron's website if you guys what to see some real motors is. potter performance.com check it out and let me know what you think. This guy ran Nortech engine program for over 20 years.

This is what we found once we got into them.[ATTACH=CONFIG]516801[/ATTACH][ATTACH=CONFIG]516802[/ATTACH][ATTACH=CONFIG]516803[/ATTACH][ATTACH=CONFIG]516804[/ATTACH][ATTACH=CONFIG]516805[/ATTACH]

Here is more.[ATTACH=CONFIG]516806[/ATTACH][ATTACH=CONFIG]516807[/ATTACH][ATTACH=CONFIG]516808[/ATTACH][ATTACH=CONFIG]516809[/ATTACH][ATTACH=CONFIG]516810[/ATTACH]

[ATTACH=CONFIG]516811[/ATTACH][ATTACH=CONFIG]516812[/ATTACH][ATTACH=CONFIG]516813[/ATTACH][ATTACH=CONFIG]516814[/ATTACH][ATTACH=CONFIG]516815[/ATTACH]

[ATTACH=CONFIG]516817[/ATTACH][ATTACH=CONFIG]516818[/ATTACH][ATTACH=CONFIG]516819[/ATTACH][ATTACH=CONFIG]516820[/ATTACH][ATTACH=CONFIG]516821[/ATTACH]

Boy what a mess!!

Tbrown. That is a good looking set up you have by the way.

T brown known fact it takes 16 hp to pick up 1 mph you only count 1 side, one motor,so 415hp to lets say he makes 575ish like yours. thats about 8.5 mph ontop of 74 mph =about 82.5 . that would also be with about 11 to 12 % slip. you better get one of those Reggie speedos I heard livorsi made them SPECIAL for Reggie.Your phone called me to day .I called you back. I proved this theory when i supercharged 425 hp to 625 hp 75 mph to 88 mph 1 more lb of boost added 20 hp put me at 89.5 down stream I could hit 91 /92 mph figure 89 plus 200 more hp they dynoed 809 hp at 5200 im spinning 31 ,5 blades 5800 slips 11% Im right at 100 mph thats all I can get you know what all 3 .of my gps ,s read anyways good luck with your build dont have real high expectation and you will be real happy .I did a thousand things to get my slip down some of the things made me loose speed. I change x dimension and center of gravity,and blueprinted hull. I started out with whipples on 8.1 now they are 3.3on 509,s SORRY I DIDNT READ THE SECOND PAGE .

You will be very happy with Rons work he is very detail oriented. I am glad I spent the money and had Ron build my engine, it runs flawlessly.

FWIW. I built a 500 EFI with AFRs, Bob Madara cam, .030 JEs 9.6:1, dynoed 572 HP @5400 on 89 Octane. Ran mid 70s in a 271 Fastech.