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XR4 MODS?

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Expand view Topic review: XR4 MODS?

Re: XR4 MODS?

by fla.viper » Jun 01, 2012 9:17 pm

77viper wrote: Ya know it wouldn't be hard to slap the 3.0 on the virage and see how you like it. The vipers were designed around the inlines so even the small v6's are more than they were designed for, now the virage is built for a v6 it might handle fine.
i havent been on line for a while, im an automotive a/c mechanic in florida so thing get really crazy this time of year. Chet ive been wanting to put the 3.0 on the virage for a while. my 3.0 has a 25 inch mid. the 150 has a 20. the 150 is mounted as low as possible on the jack plate. the jack plate as low as possible. the prop shaft is about 2 inches below the drain plug. i think i can adjust the extra 5 inches out plus more if need be. what do u think? if i had a 20 inch mid, it would allready be on. tx mike

Re: XR4 MODS?

by 77viper » Mar 12, 2012 3:51 pm

I was wrong about the displacement of the 150 motors. You can see the differences here http://www.advancedsleeve.com/mercurymarine.pdf

Re: XR4 MODS?

by RussF » Mar 12, 2012 2:54 pm

77viper wrote:The 150 and 200 are completely different in bore sixe and porting. As far as mods go have the heads cut, that's the best bang for the buck. Put fiber reeds in it as a preventative measure, remove the exhaust liner if you want it a little louder. That will give you a little boost without hurting reliability. If you want more out of it than that it is more cost effective to just go with a 200.

A bridgeport has such a wide exhaust port it needs a bridge in the middle to keep the rings from catching. The porting is a lot different than a fishing motor 2.4.
hummmm I always thought that the XR4 150 was different from a regular 150.... :o

Re: XR4 MODS?

by varmint1 » Mar 12, 2012 1:40 pm

Chet you said that 150s are 2 liter and the 200s are 2.4 or 2.5 liters. My 150 is a 2.5 and my dads 150 is a 2.4 with the chrome sleeves and my old black max 175 was a 2.4 with chrome sleeves.

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Re: XR4 MODS?

by 77viper » Feb 13, 2012 9:40 pm

fla.viper wrote:thanks chet, you are the best! i actualy thought my motor was a 2.4. i. guess ill run it on the virage, till the viper is ready for it, while i figure out the best way to replace it. i still have the '99 3.0 250 efi on my seabird. iv seen another virage with a 3.0. what do you think?
tx, mike
Ya know it wouldn't be hard to slap the 3.0 on the virage and see how you like it. The vipers were designed around the inlines so even the small v6's are more than they were designed for, now the virage is built for a v6 it might handle fine.

Re: XR4 MODS?

by Fast Viper » Feb 13, 2012 9:13 pm

Thanks a lot for the lnfo on the reeds and everything else. Seeing as my motor is. 24 yrs old its time to put in a set of new fiberglass reeds. How much do you charge for a set ?

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Re: XR4 MODS?

by fla.viper » Feb 13, 2012 8:59 pm

thanks chet, you are the best! i actualy thought my motor was a 2.4. i. guess ill run it on the virage, till the viper is ready for it, while i figure out the best way to replace it. i still have the '99 3.0 250 efi on my seabird. iv seen another virage with a 3.0. what do you think?
tx, mike

Re: XR4 MODS?

by 77viper » Feb 13, 2012 8:41 pm

Fast Viper wrote:I hear you sell carbon fiber reeds , what are the advantage to those ?

[ Post made via BlackBerry Curve ] Image
They are not carbon, just fiberglass made by Chris Carson. The main advantage is if they break it will go through the motor without damaging it where a stock steel one will tear sh*t up on it's way through. A lot of motors will idle smoother and have a better feeling midrange. I will not say they are a big performance gain just to sell them.

Re: XR4 MODS?

by Fast Viper » Feb 13, 2012 7:03 pm

I hear you sell carbon fiber reeds , what are the advantage to those ?

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Re: XR4 MODS?

by 77viper » Feb 13, 2012 6:52 pm

Fast Viper wrote:With the reed change and the liner removal would the carbs need to be rejetted on my 2.4 200 ?
Short answer is yes I started 3 sizes up but will come down to stock or leaner on a hot race day. You will want to play with it a bit but once it's set the average person can leave it a tad rich on hot days so that on cool days you don't need to rejet.

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