End of the season is here and I am getting parts together for a full build. I am doing full internals, .020 over shaved pistons, stroker rods, carbs, heads and am running an old style BPS can. I am going to run dual carbs, I already have them sitting in the garage, I know they are not really suppported here, but I got the full kit for a great price, so I am giving it a shot. I am hoping to get some cam opinions. I have searched the threads and read a ton of info on all different grinds. And honestly I just dont know which way to go. I am running a big motor on a small boat, why? because I want too, I enjoy it. So I think my whole shot will be a little more forgiving than most. I use my rig as much as possible, from fishing with the family and hauling ass fun runs in the summer to carrying big loads during hunting season. Are aftermarket cams better than stock out of the hole? my boat jumps on plane with a stock motor, so if its at least the same I will be good, but if you loose some to get some on top end, thats a big factor. I was really interested in a SETX custom grind, but I do not have anyway to get info on price or options as they are taking a break to catch up. The Hoyt cam is GT specific to in house mods. So am I left with just PVT and BPS? Will my lighter set up give me more room out of the hole with PVT? And how much will a BPS spin up for top end? Just hoping to get some direction from those know. I want to take full advantage of the other mods. I am not going for the fastest motor, cody has claim to that, but I would like to get up in the upper 30's. Thanks for your help.

Why not just use the cam you have currently?

stock cam peaks at 2200 rpms, I was under the impression I would need to be peaking power around 4500-5500 rpms?

Cant remember the name of the company but there was one floatin around on here that would make a custom grind to fit what you're wanting.. think it was big rich that was talking about them

Thanks, I will search and see if I can pull it up

A buddy was gonna order one from them but they wouldn't call him back when he went to order so he went with a pvt cam and said he is glad he did

What kind of rpms is he running now? And whats it like on bottom end, appreciate the response

Everybody I hear is enjoys the pvt cam!
He told me earlier that he had 4 people and hunting stuff and was Turing 4600 no problem! And said after cam instal really made motor come alive already had heads carb and exhaust

U can pm him bayoubuster or he might chime in after he gets off work

I run a PVT cam, it's nice power mid range around 2500 or so to the 4350 coils. Can't vouch for anything over that, I'm stuck at 4350 for now. Less off idle than the stock cam but by the time you realize it, you're where the cam wants to be and it picks up.

Thats nothing a little clutch pop can't handle in the thick shit if needed.

Heads and pvt cam will turn ~4700 on a PD...gains of about 5-600 rpms seem common. Pulls really good on a PD with thier ratios...

His cam was designed to run with his roller rockers. I have never ran them but sure more lift will only help.

How early is your BPS cam?

I have the pvt cam, heads done by Calen and mikuni carb. I called Al and talked to him before I made the purchase and he was super nice to talk too. The pvt really woke my motor up! Ran it the other day 4 people, hunting gear, camping gear and ton of other junk, came out of the hole really well considering the load and ran excellent on top. Turned 4600 no problem, never GPSed it because I could care less how fast it runs on top I'd just wanted to be able to step a load Ina short distance.


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I have the pvt cam also, along with heads, carb, and exhaust. Boat is 1854 with 3/16 bottom, 1/8 full floor, 7' rod box, etc...This past weekend I had 5 full grown adults in my boat, plus hunting stuff, and it got up and held 26 mph and change turning a little over 4300 RPMs.

how big of a difference is there between the bps vs pvt on low end and top end

17x54 GTR im running the bps cam with original bps intake, carb,heads, and EVT exhaust MB big blade carries a load very good a little slow out the hole but very good on top end evryone wil have their own opinion and every boat is made different and performs different with identical mods

I left a message with Calen and then had a nice long talk with Al last night, guy is a real nice and takes the time to explain everything in detail. I am about to pull the trigger on full internals from PVT next week. Originally I was going to just machine new pistons myself, but the price difference is minimal so I just have to balance them. Jamie B, one interesting thing Al said was that if I run stock rockers they will work, but the sliding factor on the stock rocker as opposed to the roller rocker which eliminates that will wear the guides quicker. So I was planning on just adding rockers after the budget allows. If you switch back could you let me know how it goes? I would really appreciate it.

I have read and been told mixed opinions on stock rocker and push rods vs RR and HD push rods, some say they would rather bend a push rod than catostrophic failure. Where Al says the stock push rods will flex and his eliminate that while remaining light.

The last part in this equation is shimming springs or getting the correct tension from an aftermarket spring. I shimmed springs in my hopped up kohler and ended up having to replace them with the correct springs after one season because they wore out. Al claims .060 shims will be ideal for the cam and keep the lifters in contact. I cant decide which way to go on this one either.

Thanks again for the info guys, best way to make the right decision

I have never had a problem with the side load on the valve guides from the stock rocker arms and pushrods. I have seen numerous amounts fo after market rockers fail (don't matter what brand). I am going to swap them out just to see what the difference is for testing purposes, but really doubt that I will be putting them back in for the simple reason that I rather the stock pushrods be the week link. But with my motor it is kind of a double edge sword due to it will spin up the rpms in the water that gets to the point of where the stock pushrods fail, so I might have to reinstall the HD pushrods and aftermarket rockers again.

Awe that ain't nothing but a few Jamie, once you don't feel like experimenting anymore, might as well hang up the wrenches! That's what it's all about. The work of a tinkerer is never finished

I have been pulling my hair out since I shut it down for hunting season. lol

Would a pvt be a good choice forva prodrive? Im nursing a seeping case gasket and plan to change after hunting season. Motor is bone stock. I was planning on cam and heads and that will be the extent of my mods. Though i may as well do the cam when i tackle the gasket.

That wouldn't be too hard. Teal are one of the slowest ducks and usually only fly around 30 mph.

I heard dfou is building mud boats that can run down a canvasback. Now that is "impressive"!

CJB..its not a cdi

Cool. Appreciate the info.

All this cam talk has got me wondering what cam he might have. On the first cams that Al made, the timing mark was one tooth off, then they corrected it. Along comes the BPS which I believe has 2 grinds one of which was Al's and then there own later on. Now with the new PVT, is the grind the same as the original or has it been redesigned also? I am running the original mis-marked ones that came in the first 45s and it is definitely a WOT cam.

I do have the spec sheet on the original, but it is in a format that I cannot figure out how to post. It would be nice to see a cam card from the other BPS and PVT cams for comparison.

Pretty sure he has a stock cam right now. I think people are confusing where he said he has a bps can. He is talking about his exhaust if I'm not mistaken.

Aren't the new rollers shaft mounts? Were they always a set of shaft mounts or did they used to be individual rockers?

Old style BPS exhaust, stock cam, but thats about to change....

I have no doubt we could put my motor on your boat and run mid 30's or better, if it weren't tall. The BPS cam really didn't help my hole shot, but my boat has an issue that I know is hurting the hole shot. That'll be corrected in the spring. The cam starts pulling around 2000 and it's balls to the wall all the way to 4600, but there's not enough speed gain between 4500 and 4600 to be worth burning the extra fuel. That may change after I correct the issue also. I have power to spare. With two men sitting on the front deck it lifts the bow and jumps on plane in a heartbeat. With rods and pistons you'll have me watching your rooster tail. Which ever cam you go with, if you don't like the hole shot, you can always go a tooth bigger on the bottom gear, and you'll have enough power to turn the Hammer.