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How much of this work can you do yourself ? My point is, if you can pull the engine and remove your old heads and install the mild worked dove heads and reinstall, that would be pretty cheap. I have read posts regarding a timing chain and cam upgrade that will net a 40 hp increase. I would trust lakes only on his knowledge. He has a good handle on this stuff and I haven't heard any negative feedback regarding his work on this forum or hotboat.He listed some numbers you should look into. This will help you determine where your current setup is.Good Luck,DEL51.
Sweet, that would be great if they worked with my boat. I look forward to seeing what everybody says about them.
How about a LakesOnly topend and a set of Hardin Marine 460 manifolds. Thats my plan (topend) but I have a set of Kodiak Aluminum manifolds for the time being. I Also taked to Bassett about their Tri-Y headers and they said they can do a set in a 460 configuration....for a price. Probley equal to or less than the BT heads alone. http://www.performanceboats.com//showthread.php?t=4272
So many darn choices, sounds like BT heads may not be what I'm looking for. My thread goes against a lot of the other threads where guys are trying to get the most power, where I'm trying to save room for the family and friends and run more efficiently. There's no better sound to me when I have a boat full a kids pulling them skiing and tubing all over the lake and river all day.
I remember a quote somebody had on their sign off where it was something to the effect of "Anybody can make an engine run hard, but can they make it run hard all day" (forgive me for the misquote). So the research goes on.
Originally Posted by Flash Lakes only, does your formula include running log exhaust or other type of exhaust?
Thanks again for the great info. Let's say 90 hp increase with logs/no exhaust change/does not include adding headers, if that's what you're asking. The addition of headers would help significantly more, and again would offer more room to grow as other parts of the combo are also enhanced.
Specifically, my post above assumes that you have a true 460 marine spec engine with the SCJ spec camshaft (essentially the M-6250-A460 Ford Racing cam). Last time we did this, the customer also added a Stealth intake, Holley 850 cfm, and had an MSD distributor, and the valve train upgrade was roller rockers with a 1.8 ratio. This showed a pump indicated mid-90 hp gain. Thru-transom logs.
If you have the 460 Marine engine, then the factory marine iron intake (D0OE-6425-C, same as SCJ) with a the Holley 850 should be plenty, at least for the time being. Given the typical rpm range of most Ford 460 jet boats (4500-5200), the intake port cross-section of the C8VE/C9VE/D0VE (aka "early-style") heads will offer very good intake port velocity and cylinder filling. Compared to your D3VE-A2A heads, the early-style heads will increase compression ratio from about 7.8:1 to about 9.1:1 on a bone-stock engine, cylinder filling will be vastly improved with the ported intake runners, and the exhaust scavenging will be even more greatly enhanced than the intake side of the head.
Don't get me wrong, I don't think that the factory iron can hold a candle to most of the aftermarket heads out there, and they cannot support the substantial hp of a BT head in the right engine combination, but I do think they are bang-for-buck and more than suitable for what you want to accomplish. For the record, yes I am a 460 purist and a bit biased about utilizing the factory iron ...but if the heads weren't up to the job you are asking then I'll be the first to say so.
not the best pics..looks cramped here but in real life there's room to stretch your legs..i'll go take some better pics when i'm out in the garage tonight if u want.
Lakes only, does your formula include running log exhaust or other type of exhaust?
Having a deck across the back of the boat, does that cut down a lot of room. I can seat six comfortable, just don't what would happen if I got rid of the two seats.
Thanks again for the great info.
no offense lakes only, just was joking. Flash, i know you want to keep your jump seats, but the boat in my avatar..best thing i ever did, in my opinion , was turn the back into a bench with large engine padded cover. I was sceptical at first but turned out to be way more comfy. Just my .02.
Cruiser guys, sorry if my above post came out wrong/was worded condescendingly...didn't mean it that way.
Mike, my interpretation of this thread is that since you are looking for heads and exhaust, you must have a pretty much bone stock 460 in your boat and want a little more power that can also be fitted beneath your engine hatch.
There is such a thing as "too much cylinder head," and I think that BT heads on an otherwise bone stock marine 460 with cavernous dished pistons fit in this category and will offer little performance gain for the several thousand dollars (heads & exhaust) spent on such a top-end upgrade.
I do see you dillemma, though, in that the BT heads are the "smallest" 460 applicable cylinder heads that come with the BBC exhaust flange and that you also must run water jacketed headers under that engine hatch. Also, any savings through the use of a smaller Ford cylinder head would be offset by custom-made water jacketed 460 thru-transom headers. You're in a tough spot.
To me, the best answer is not to go overkill on the cylinder heads, but rather go "just right" on the cylinder heads. The most common upgrade (countless times) we have done to bone stock marine 460's is a ported D0VE head upgrade. I think that if you installed early-style (a la D0VE) ported 460 heads with a valve train upgrade and keep your current thru-transom exhaust that you would find not only plenty of power but also room to grow in the future...and all for thousands less than the upgrade that you are specifically investigating.
The ported D0VE head swap can offer 90-100 hp typical gain....and we haven't even touched the camshaft yet.
I like BT heads; just trying to point you in a more logical and cost effective direction,
When I get home I will measure mine. I will measure from edge of exh to edge of exh. I have lightning headers on mine.
I appreciate the insight, my motor box now is 34". I don't know how wide exhaust from Eddie Marine or similiar manufactures are.
Again thanks for the input and saving me money. I mentioned the BT heads because they already had a Chevy flange without buying an adaptor.
Originally Posted by Fo Sitty Says the guy with the broke down chevy. oh snap!!
Originally Posted by Jetaholic 'Cause Fords need all the help they can get Says the guy with the broke down chevy.
Originally Posted by Jetaholic 'Cause Fords need all the help they can get No i think you need all the help you can get