How much Hp can a 200EFI Make???

[bigboatin]

I just wanted to know how much Hp can be made from a 200 EFI? just a round about number,and how much modification is required. reliability is not a big concern.

[WILDMAN]

Oh, maybe, 200?

[bigboatin]

I was hopeing for alittle more than that. but thanks for the heads up..

[The Big Al]

Never enough.

Without going crazy 225hp

[bigboatin]

I sorta had that number in mind but wanted some input. off the subject the boat show here in sc went pertty good today despite the cool weather al.

[The Big Al]

Yea, I went to Chas SC last weekend so I passed.

Al

[bigboatin]

I`ll post some pics sunday just for..gp.

[Burke Kilgour]

What year 200? That makes a BIG difference.
A late model steel bore behind the liner 200 will push over 300 HP :eek: :D
So, anywhere in between is possible depending on the depth of your wallet............

[bigboatin]

Hey bk its a 98 200, i`m getting ready to tear it down,i`d like to make the mods while its in progress,i`m in no hurry so i can feed it the wallet as i go.

[86vintage]

This is what to expect

Port to 260 hp spec 500.00
top pinned forged pistons 1,100.00
Bore throttle plates larger 150.00
PCU Computer 400-1200
gasket set 150.00
CC heads 150.00
Balance, polish rods 150.00
lighten flywheel 200.00
Fibre reeds 175-200.00
14 pedle front half and reed cages 4-600.00
Plus bearings and seals 300.00

Than labor to build this should net 275 hp without labor that is roughly
$4,700.00 that would be a motor that would run strong to 9,000 RPM

Best way to start is mill the heads and Bracatto PCU or reprogram stk PCU
with EGT Gauge(exhaust temp) no hotter than 1100 degrees F.
HP IS PROPORTIONAL TO $$ CUPEDhttp://forums.screamandfly.com/forums/images/icons/icon10.gif

There's a start in what you can spent
Have fun
James
86vintagehttp://forums.screamandfly.com/forums/images/icons/icon14.gif

[Ted Stryker]

If your asking about the "efi" part of the equation, I agrre with the 225-230 range... As far as a ported block, well over 300... I have an early 90's model 200 block that has recieved the full treatment from Jay Smith, and it is fully expected to make well over 300's @ 8500 rpm with 185+lbs. of compression... That is with a slightly modified 2.5 horn, modified front 1/2, block porting all the way through including the center mains being 4 - bolted like the factory Mercury performance castings... It has everything, I can't remember a large number of things that were splurged on... It only has about 2 hours break-in on it with low compression heads and safe ignition timing, but I could tell that it's got some shove even well under 7,000 rpm... These are the things that I can remember at the moment:

> Horn radiused
>260 front 1/2 smoothed
> preferred pedal, but can't remember which
>260 crank
>balanced and polished 260 rods
>SPS rod bolts
>4 - bolted block
>lightened drag pistons with welded top pin
>light weight tool steel wrist pin
>Lake racer lightened flywheel
>New injectors from Brucato
>Cooling mods put into block per John Marles instructions

[The Big Al]

If your asking about the "efi" part of the equation, I agrre with the 225-230 range... As far as a ported block, well over 300... I have an early 90's model 200 block that has recieved the full treatment from Jay Smith, and it is fully expected to make well over 300's @ 8500 rpm with 185+lbs. of compression... That is with a slightly modified 2.5 horn, modified front 1/2, block porting all the way through including the center mains being 4 - bolted like the factory Mercury performance castings... It has everything, I can't remember a large number of things that were splurged on... It only has about 2 hours break-in on it with low compression heads and safe ignition timing, but I could tell that it's got some shove even well under 7,000 rpm...

And it only runs on 6.00 dollar agallon racing fuel!!!!:rolleyes:

[Ted Stryker]

There were no stipulations in the 1st post as to what it would take to do such a task... He asked how much could be gotten from a 200... I'll bet that if a question arised about how much could be gotten from a tricked out 3.4 stroker Merc or a 750 inch Donovan for that sake, the same $6 a gallon fuel or something comparable would be used.. ;)

[bigboatin]

This is what to expect

Port to 260 hp spec 500.00
top pinned forged pistons 1,100.00
Bore throttle plates larger 150.00
PCU Computer 400-1200
gasket set 150.00
CC heads 150.00
Balance, polish rods 150.00
lighten flywheel 200.00
Fibre reeds 175-200.00
14 pedle front half and reed cages 4-600.00
Plus bearings and seals 300.00

Than labor to build this should net 275 hp without labor that is roughly
$4,700.00 that would be a motor that would run strong to 9,000 RPM

Best way to start is mill the heads and Bracatto PCU or reprogram stk PCU
with EGT Gauge(exhaust temp) no hotter than 1100 degrees F.
HP IS PROPORTIONAL TO $$ CUPEDhttp://forums.screamandfly.com/forums/images/icons/icon10.gif

There's a start in what you can spent
Have fun
James
86vintagehttp://forums.screamandfly.com/forums/images/icons/icon14.gifThanks 86 for the info thats what i was looking for!!

[bigboatin]

If your asking about the "efi" part of the equation, I agrre with the 225-230 range... As far as a ported block, well over 300... I have an early 90's model 200 block that has recieved the full treatment from Jay Smith, and it is fully expected to make well over 300's @ 8500 rpm with 185+lbs. of compression... That is with a slightly modified 2.5 horn, modified front 1/2, block porting all the way through including the center mains being 4 - bolted like the factory Mercury performance castings... It has everything, I can't remember a large number of things that were splurged on... It only has about 2 hours break-in on it with low compression heads and safe ignition timing, but I could tell that it's got some shove even well under 7,000 rpm... These are the things that I can remember at the moment:

> Horn radiused
>260 front 1/2 smoothed
> preferred pedal, but can't remember which
>260 crank
>balanced and polished 260 rods
>SPS rod bolts
>4 - bolted block
>lightened drag pistons with welded top pin
>light weight tool steel wrist pin
>Lake racer lightened flywheel
>New injectors from Brucato
>Cooling mods put into block per John Marles instructionsThanks for the info TS i`m going take all the info you fellas have givin me and make a plan of which direction to go or how much hp i want to squeeze out of this motor. thanks craigo

[bigboatin]

There were no stipulations in the 1st post as to what it would take to do such a task... He asked how much could be gotten from a 200... I'll bet that if a question arised about how much could be gotten from a tricked out 3.4 stroker Merc or a 750 inch Donovan for that sake, the same $6 a gallon fuel or something comparable would be used.. ;)Your wright TS i`m not really concerned about the fuel cost as this boat/motor combo will ony be used when some of the guys around here (call me out)!!!!! in the mean time i`m burnin way more fuel with my other ride.

[StratosVT]

Screw all that porting and scraping around for a few extra horsepower. If you're not concerned about reliability, spray it! Get a drag ecu and a big hit of nitrous! Under $1000 and as much hp as you want.:D Now if you want it to (possibly) live for awhile, you might want to lay out some more cash for forged pistons, etc.

[bigboatin]

Screw all that porting and scraping around for a few extra horsepower. If you're not concerned about reliability, spray it! Get a drag ecu and a big hit of nitrous! Under $1000 and as much hp as you want.:D Now if you want it to (possibly) live for awhile, you might want to lay out some more cash for forged pistons, etc.That thought had crossed my mind and i still would make a few mods so the motor could handle the nos.

[86vintage]

If you go with Nitrous Leave the motor stock (don't mill the heads) retard the timing 4 degrees, don't spin it over 6,500 RPM Get a larger Prop with vent holes to spin at lower RPMs. Use seperate gas for the nitrous make sure it is race gas mixed with a 40:1. You can use regular High test for the main fuel tanks and then when you hit the Nitrous you've got race gas with a richer oil mixture, Run a drilled Mid Section (Drive shaft housing) with the Can removed. Nitrous likes to breath hard out the Exhaust!
The motor will jump 100 HP with a good fogged nitrous system one Nitrous bar Jet across each of the three inlet ports back about an 1.5 inches before the reeds. with dual EGT's (exh. temp.) to make sure you don't melterdown!!
Should have done this myself - but I am an engine builder like to match each component down to the 10th of a gram or better, each component is a piece of hp plus artworkhttp://forums.screamandfly.com/forums/images/icons/icon12.gif

Build a number of nitrous motors the stuff builds incredible torque and HP
But do not go over board - one wrong run and it's a puddle of metal. The stuff is not forgiving you need to be on your game!!

James
86vintagehttp://forums.screamandfly.com/forums/images/icons/icon14.gif