Help picking out a cam...
#44
This one HR-226/345-2S-12 IGOperating Range:2500-6000 RPMDuration Advertised:288° Intake / 298° ExhaustDuration @ .050'' Lift:226° Intake / 236° ExhaustValve Lift w/1.7 Rockers:.587'' Intake / .610'' Exhaust
I could be wrong but it doesn't look like it's worth changing.
I could be wrong but it doesn't look like it's worth changing.
Last edited by GPM; 03-12-2018 at 02:47 PM.
#46
Just my opinion, the cam is only 2 degrees bigger so I doubt you'll be able to tell. Going from 110 to 112 lsa might idle slightly better, loose a little midrange and maybe pull another 100 rpm. The valves may hit the pistons with the higher lift.
#47
Platinum Member
Platinum Member
can't help much on cam, but I ran a HP500 with a procharger for years, several carbs and EFI, last setup had to go down to a 750 from a 850 to keep from leaning out at WOT, thanks god for widebands. the air was being blown thru so quickly that would not pull fuel, the 750 worked perfectly
MC
#48
Platinum Member
Platinum Member
Yeah, you are tapdancing around essentially the same cams for the most part. Sure a little more lobe separation will help a touch, but if you don't have reversion problems I wouldn't bother changing them out. The procharger will definitely wake up the motor, but you definitely want to use a low pitch prop when pulling tubes to take the load off of your outdrive. Running a high pitched prop, and a supercharger while pulling tubes puts a lot more actual torque load on the drive components. Drop 6" of pitch, and you reduce the load on the components dramatically.
I blew up more Bravos than I care to think about. Old style, upgraded to newer cone clutches, billet caps and upgraded parts and pieces - each step made them a little stronger, but you simply won't find me recommending anything over 550hp with a Bravo. XR's are grenades as well. A lightweight boat, under 5600 rpm, cryo gears, billet cap, shower, maybe 650 hp for short bursts if you baby it elsewhere.
You guys who run 800hp on a Bravo, I gotta hand it to you.
You must be more Irish than I am (and I am Michael Collins by the way, with a stout dose of Irish bloodline...).
MC
I blew up more Bravos than I care to think about. Old style, upgraded to newer cone clutches, billet caps and upgraded parts and pieces - each step made them a little stronger, but you simply won't find me recommending anything over 550hp with a Bravo. XR's are grenades as well. A lightweight boat, under 5600 rpm, cryo gears, billet cap, shower, maybe 650 hp for short bursts if you baby it elsewhere.
You guys who run 800hp on a Bravo, I gotta hand it to you.
You must be more Irish than I am (and I am Michael Collins by the way, with a stout dose of Irish bloodline...).
MC
#49
MC,
I’ve already canned the idea of any blowers as I’d rather boat than wrench. I should be well under 550hp and already use a smaller prop for whipping poor unsuspecting friends onto the beach .