Building motors for the 43 GT
 

So am going to build motors for my 95 43' gt throughout the winter months. The question I have is what do you guys think I will need for hp to get her in to the mid 80's?

Mine runs 72 with tired 575sci's. Doing the math i would guess somewhere between 700 - 750. If yours is a non stepped hull, I don't know how much it will hurt. Yours being a flat deck should help.

With 750s a 2000 43 will run right at 85 depending on load with 32p props.

Another new user name!!!!

Yeah I suppose so. My original user name was soak_it_n_cider. It was attached to an email yahoo deactivated so when i forgot my password I kinda had to create a new one.

O sorry about that i thought you were Jason Parvey. But did you just buy your 43bt??

No problem. Yeah I bought it last memorial day.

any pics?
brett

Yeah, I will post shortly

lmfao.... Will the real Jason please stand up!!

Jason3603, I think some reliable 700hp 572's would be nice. They should run along time with no issues and should put you over 80 with no problem.

Best,
Jason Parvey

From the pic do all flat bottom BT's run so tight to the water? Any ideas on how to loosen her up?

Did you finish the refurb on it? Boat looks nice. IMO, I like the attitude it is running at.

-JP

Yeah, I used the engines out of my old boat, put about 25 hours on in the BT then the last ride of the year killed a rod bearing. The 454's were tired anyway so I planned on a rebuild or replacing with something different.

What do you think of the GMPP 572's crate motors with a cam change. Heard some good and some not so good.

I think I took that pic I guess I better get the surface drives before we got 2 projects going on at the same time

Oh boy. Another flatdeck...:coolcowboy: imo as well as Saxmans, it will take 700 a side to see 80. Gregs 97 does carry the nose better and it is straight bottom. 525 efi and Bravos.

Engines should pulled and torn down this weekend. Hopefully get the heads, intakes, and blowers over to Velaco by Friday.

Now I just need to figure out what cubic inch. Thinking about 540 short blocks. So I can use my existing b&m 250 super schargers, chillers, oil pans, intakes, timing cover ect. Thoughts?

Sounds like a good build plan. What drives are on this boat? Also, I m sure ou have checked them thouroghly but make sure that transom and stringers are good. Just previous experience tells me that these boats always dont fair the best.:eek:

Currently running bravos with max machine upgrades. I am very interested in the new Imco I keep hearing about. Do you guys think a higher x is needed or is the larger surface drive prop the key to putting up higher speed numbers?

The stringers and transom are pretty good.

B&M blowers are old school should look for something more updated if you can afford it. Keep in touch I have a BT with #6a and big power in your area.

Which one?

All in due time. Ideally I want to be in the the 90's. But that will take some time, new blowers, drives, etc.... Not in a hurry to get there just yet. My last boat was in the mid 80's. Just want to get back there for now. Thanks for the input.

Where do you typically run?

Hey Dennis, how did your prop testing come along?
-Jason Parvey

I've got some 540 blower motors the owner wants gone:

540 cubic inch, heads are dart, blowers are weiand 8-71's, lunati cranks, milidon pans, stud girdels, roller lifters, made 954 HP, 890 torque, dyno sheets available. Heads have been gone through, new springs etc, rings, bearings, everything new, never even been fired yet. Over $60k invested will take $28k for the pair. One blower is missing it was stolen while in storage.

Yeah which black thunder is yours? Where you at boyne thunder 3 years ago?

Jason....572 sounds good to me. Coolerman needs someone fast to keep them motivated to go faster!