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Old 05-20-2003, 05:59 PM   #1
BraunCapital
 

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Question Small Block performance upgrade suggestions

My engine compartment will only fit 2 small blocks. I presently have 2 newer 350 Magnum EFI Mulptiport engines.

Please suggest horsepower upgrades.

Thank you very much. RB
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Old 05-20-2003, 06:31 PM   #2
bobby daniels
 

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It depends on how much money you want to spend (cubic dollars)
you can put a blower on which is the best but most money or you can stroke it to a 406 or 383 and make a very good motor
there is ton we can do ,,give me the amount ,,,wecome to the board
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Old 05-20-2003, 06:36 PM   #3
BraunCapital
 

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Would $4,000 to $6,000 do anything?
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Old 05-20-2003, 07:22 PM   #4
bobby daniels
 

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both motors alittle ,,each motor alot,,,,, thats worth the money I should say
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Old 05-20-2003, 07:30 PM   #5
BraunCapital
 

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How about $3,000 per engine?
I am considering Stainless Marine manifolds and risers as a start. Any thoughts?

The engines are out of the boat, therefore now may be an ideal time to make some upgrades.
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Old 05-20-2003, 07:32 PM   #6
BraunCapital
 

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Also...Any thoughts on "lab finishing" the props?
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Old 05-20-2003, 09:00 PM   #7
bobby daniels
 

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yes that may help a few MPH , I would add a stroker crank and pistons,and port the heads and go to like 9 to one compression and change cams with the stainless exhaust and that would make a potent package for alittle more than you were talking

To start with port the heads and angle cut them to get 9 to 1 comp. add you exhaust and a cam and reprogram the ecu and that will be a good start
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Old 05-20-2003, 09:29 PM   #8
BraunCapital
 

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Thank you for your thoughts.

Would it be better to trade for Scorpions (340 hp)? My 350 MPI EFIs are newer. I think I can get them on a trade plus $6,000.
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Old 05-20-2003, 09:45 PM   #9
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Join Date: Mar 2002
Location: Vestal/Binghamton NY
Posts: 3,469
1992 450hp Senza Spectre 25'
what about this 92 350mag pretty stock I just put
K&N filter, K&N snubstack , EMI thunders, and Corsa Q & Q
thur hull. this is in a 25 foot 3800lb dry single step boat
How much to get a reliable 400hp
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Old 05-20-2003, 10:36 PM   #10
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Join Date: Jun 2001
Location: Alexandria, VA
Posts: 611
1986 Sea Ray Pachanga 22
If your motors don't have them already, upgrade to the vortec heads. Looks as though they will flow nearly 400 hp without a lot of work. Not sure how much as you are limited in cam choices with the wet exhaust. i'll dig up the article as soon as i can.
ken
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