little upgrade
 

Hi all . I'm sure this questions come up many many times but can't find it on site anyways just wondering what would be the most basic performance upgrade or hp gain ratio for a 98 454 EFI that would not brake the bank , I tried the props already with little difference, thanks all .

There is nothing else. Probably stinks to hear that but atleast you can think about other things as you lay in bed. :)

Nothing your going to do cheap to that motor that is going to give you a kick in the pants 5 mph upgrade. By the cam is small, the heads are puny, the crank and rods are weak points and anything you do is going to need the ecm reprogrammed. You are dollars ahead to buy a better motor and sell yours.

If you do decide to build, there is a good chance the 98 efi is a gen 6 block, which would be a 4 bolt main and a roller motor. Better heads, a cam, higher compression pistons and a reprogram, if done smart will put you up around 450 hp.

Another way is to deduce weight. Remove everything out of the boat that isn’t bolted down except the required USCG equipment. Run only with the fuel you need for the trip. This might give you 1-2 MPH

Try the search function and you will have enough reading to get you through the new year. :santa: And I believe the saying is break the bank :drink:

After reading all the threads it comes down to one thing and one thing only $$$

Money..pffft....

Im building a 600 hp 454 blower motor with parts from walmart.

https://www.walmart.com/ip/Crane-Cla...2-16/112440378

Whipple.

Save $$ for drinks, and tell people at the bar your boat goes 5mph faster.

Most peoples boats are 5 to 10 mph faster after a few drinks ;lol

One of these performance intakes will get you 5mph.

Marinara or alfredo sauce for the al-dente crank and rods?

The best bang for the buck is to leave it alone and boat while others are at the dock with melted pistons on their $40k blower motors.:)

In the good ol days you could really find something to wake up an engine such as a cam, bigger carb, headers etc but that’s not really the case with boats.

Those motors aren't worth much of a difference in money dead or alive. Whipple it and enjoy it while it lasts. Just don't venture too far offshore if you get chance.

“If you ain’t first, you’re last.” Reese Bobby


MERRY CHRISTMAS!

Agree with the majority of posts above so forget about going faster in that boat.
Assuming it's the Crownline, have you got thru-hull exhausts? If not, spend the money there. Still won't be cheap, will make little or no difference to performance but will give you a new interest in the boat. A stock 454 can still sound pretty good and you won't compromise reliability.

Anyone now a good deal on thru-hulls?

RR

Hi , yes this boat has threw hull captains choice exhaust , but instead of spending thousands , have that drink or two at the bar and say it goes 5 mph faster , or just keep it tuned right up .

You could put in a Baja speedo. Those always seem to read 10mph faster.

Or just take the speedo out. We grew up with jet boats-nobody had a speedo.. We would ask people skiiing what rpms they would like be be pulled at. A few of the boats in the group were 100mph boats (realistically the would run mid 70s��). They sounded fast anyway!

**********d^^a^^r^^r********

Ha! I’ve been mistaken as Darr, that’s not a good way to end the year.

Got risers here
https://www.offshoreonly.com/forums/...rs-bravos.html