BrendanR what is your 201 Liberator’s setup? To hit 85 mph you have to be running well over 500 hp, Probably 575+ hp.

Running about 625hp. I have a full mayfair duel ram external steering kit and a max machine worx built xr drive with a 1.50 gear which next year will have a -2 shorty speed master lower and a 1.35 gear. It currently has a 4 blade 28p bravo prop which is also getting changed. The setup is a 509, big cam, aluminum heads and a tiny heat maker on top. I just picked up an m1sc that's going on in about 8 weeks

BrendanR so you are joining the Procharger crowd. 625 hp is a lot in a 201 Liberator.

Yes, joining the procharger crowd because I got a good deal on it. I have plans to build a twin turbo 540 but it will end up in a larger hull. Family always had liberators and after researching and finding the 108 mph 261 I said, I'm going to beat that. This thread intrigued me because I wanted to see if anyone else beat that record yet in a fourwinns. So far, I'm at 85 mph with no tabs and a 4 blade prop. When the procharger goes on, I will be pushing the 850-900hp mark and lenco 18x12 ss electric tabs are going on this 201. As soon as the site allows me to post photos, I will do so.

I'm on plane by 25 mph. Last year I beat out a friend's 17' jet boat with a mild built 454. He swapped to his 496 and it was fast however I was realing it in but I believe because he was topped out around 70.

https://cimg9.ibsrv.net/gimg/www.off...7145b1a2e8.jpg
https://cimg2.ibsrv.net/gimg/www.off...6f425316f2.jpg
https://cimg5.ibsrv.net/gimg/www.off...d3b7369814.jpg
https://cimg8.ibsrv.net/gimg/www.off...62228c2c2e.jpg
https://cimg9.ibsrv.net/gimg/www.off...255582537b.jpg
this is her.

This is the video at 82 mph at 5800rpm

Looks like you have the same exhaust that is in my boat. IMCO Powerflow exhaust manifolds with stainless steel risers going to stainless steel piping going to the stock exhaust ports.

I would like to see a video from shore or from another boat of your supercharged 509 Liberator running 82 mph or faster.

it will never let you post videos.
Videos need to be posted elsewhere like youtube, then linked here.

I wish I had one... the problem I've run into is not getting enough bow lift. 3/4 of the hull is still in the water at that speed... I'm getting a 3 blade lightning et prop to help with bow lift but I know it's not going to be enough. I'm considering a delta pad at the rear to help and I have a nice cav plate from max machine worx as well to install. Still unsure what else to do to get the bow further in the air...

yeah, I figured that out and posted a YouTube link for the GPS 82 mph pull.

https://cimg2.ibsrv.net/gimg/www.off...caa3db37d.jpeg
https://cimg3.ibsrv.net/gimg/www.off...1a6c89467.jpeg
My new 406 on the engine dyno with the dyno headers on it.

Love it!

https://cimg7.ibsrv.net/gimg/www.off...6348170215.jpg
My new 460 chevy full forged dart iron eagle 308 head on dyno last week going up for sale...

https://cimg2.ibsrv.net/gimg/www.off...78db92498.jpeg
My 400 in 2018.

Are you guys on the fourwinns liberator fb group??
alot of guys would love to see what you have...

Any new numbers by anyone? Any other members who are at 70+ mph?

https://cimg1.ibsrv.net/gimg/www.off...9c133794de.jpg
This was last Saturday in my 201...did a quick rip, let out at about 5800rpm and screen shot the gps speedo at the no wake zone.

80mph
:)
cookin"

habe you been out on the water this year yet? Where are you located? Love to hear that beast

BrendanR 5,800 rpm out of a big block supercharged 509 seems like a fairly high rpm. What is your max rpm?

max rpm is 6000 rpm. This engine is fully blue printed and balance and girdled 5500 is my average top rpm however to achieve 85 mph with my 1.50 hesr and 28p 4 blade prop I had to turn 6k

I have not had it out this year. I have another boat project I am working on trying to finish. I boat on the Tennessee river at decaturville tn and venture down to ky lake also.

My 400 engine would hit top speed at approximately 5,200 to 5,250 rpm with the 23” Mirage Plus prop. The new 406 engine makes peak HP at 5,500 rpm. Power is only 11 HP less at 5,600 rpm. I’m hoping the boat can hit top speed at 5,500 to 5,600 rpm. If so my boat should hit 75-76 mph.