Marauder camshafts...

[fairlane347]

I am now thinking of doing performance cams in my MM and some other mods and keep the car N/A. After hearing about all the power adder cars not holding together I don't think I will do a blower. The cost it bad enough but I don't want to build a new engine or have to in the future. I don't think many MM's have cams? I know th performance gains for the $$ is not that good but I REALLY want the overlaping cam sound!!:D My goal for N/A would be 350rwhp and similer Tourque. Any suggestions? Thanks

[94_302]

I would check out http://www.mach1registry.org/forums/index.php I keep hearing the auto mach's are basically the same motor as us except the intake goes the other way. In the engine and drivetrain forum their seem to be a lot of posts about cams.

Here is a member who went with ported heads and a cam setup http://www.mercurymarauder.net/forums/showthread.php?t=23765&highlight=cam Post 16 and you see his dyno numbers with just heads cams and exhaust. No tune intake pullies or anything. I would love to see some more n/a built Marauders.

[hitchhiker]

Has anyone put Marauder DOHC heads and induction on a COBRA bottom end?

Wouldn't that make a great engine for a blower?

:D

[RR|Suki]

Has anyone put Marauder DOHC heads and induction on a COBRA bottom end?

Wouldn't that make a great engine for a blower?

:D

In that case you might aswell just get the whole cobra motor, since the main difference in the bottom end ;)

[merc]

After hanging out with Martyo and Mark VanMeter last year in Bristol, I am thinking Proline has all the answers to my questions. I am looking to stay N/A for another couple of years, but the turbo gods keeps sending messages.

http://www.prolineraceengines.com/index.html

http://www.mercurymarauder.net/showcase/files/2/3/8/Markscar.jpg

[MarauderMark]

After hanging out with Martyo and Mark VanMeter last year in Bristol, I am thinking Proline has all the answers to my questions. I am looking to stay N/A for another couple of years, but the turbo gods keeps sending messages.

http://www.prolineraceengines.com/index.html

http://www.mercurymarauder.net/showcase/files/2/3/8/Markscar.jpg
Yeah Boyeee.Go ahead my friend:up:

[Grifter]

all of the 03 dohc vehicles have the same cams. Cobra, Marauder, Mach, Navi, etc. so swapping marauder heads to a cobra shortblock isnt going to gain you anything but a cobra longblock coombo. the marauder heads are no different than any other 03 4.6 dohc head. and unless its an 03 cobra shortblock, you pretty much have the same motor you have now, but with a forged crank. keep in mind that the 03 cobra block is iron, not alum. much heavier.

[SergntMac]

After hearing about all the power adder cars not holding together I don't think I will do a blower. The cost it bad enough but I don't want to build a new engine or have to in the future. I don't think many MM's have cams? I know the performance gains for the $$ is not that good but I REALLY want the overlaping cam sound! You have accomplished exactly what I predicted would happen. You associated the failure of a stock engine with a power adder adapted to it. In reality, the numbers of Marauders with one style of blower, or, another, greatly outnumber those who have suffered engine failures. Bad math, and wrong twist on true facts.

Adding cams (and related hardware) will not side-step the chance of blowing an engine. Marauder heads share specs with the Aviator, Mach I, and Cobra heads. Same valves, cams, springs, keepers, adjusters, guides, seals, ect. Nothing different between any of them.

Now go look at the specs of the FR500 heads, ect. They have everything you would want to do to the OEM heads already done for you.

Moreover, adding cams will not produce any idle "lope" on the Marauder, the computer is too smart for that. The really "built" 4V DOHC engines I have seen (and driven) are more smooth and quiet than the OEM engine, 'cause everything is in the tuning.

Our OEM heads breath well enough in stock trim to handle up to 18-20 PSI of boost, producing 600+ RWHP. Prolly more, but I didn't go here myself. But, as they say in race track pits across the country, "there is always room for improvement", and if you want to get the best bang for the buck, keep your OEM cams and work the heads, valves, springs and all that. The OEM cams are that sweet.

The problem is, after you dust off their potential and they catch up to the FR500 heads, there isn't enough air and fuel coming in, or, exhaust going out to make the investment reasonable, and you end up adding one or more power adders to get where you wanted to go in the first place.

My advice, is leave the cams alone and add a 50 pound shot of NOS.

[Glenn]

You Gotta Have BOOST!!! It is a real blast. I waited 3 years deciding that the SC was not economically justified and cost way too much! I was right on every count, but did not included the absolute thrill factor in driving a car that is 99.9% faster and more powerful then any other car on the road (at least in GA). Nothing is more gratifing then blowing off the road a nice Corvette and have the driver give you a big "thumbs up" (especially when he blows 3rd gear and he gets a huge cloud of black smoke out the exhaust as the engine redlines, to say he was embarrassed is an understatement). I have even started driving more conservatively knowing that I can pick and chose by opponents and not waste my time and gas.

Glenn :burnout:

[fairlane347]

Thanks for the info guys. I don't know what I will do yet, but the Trilogy looks to be the best way, as long as the tune is safe. I am no stranger to the hp since my Fairlane will out run the blower MM's but my MM is one I will drive all summer and I want it to live long!:D Now I just need that $6k were did I leave that:censor: ??

[natedog1284]

I have the FR500 heads/cams that mac was talking about. While I can say it is a vast improvement over stock, it obviously doesn't compare to a blower. Given the mods I have and some of the cars I have raced, I would estimate my rwhp to be in the 350 range, although I haven't had my car dynoed yet, (I'm waiting to do my TC, 4.10's and tranny upgrade before I get a real good dyno tune). But my buildup has been a long term upgrade plan, which also includes going to a forged bottom end, (and probably boring/stroking to a 5.0 or 5.1), nitrous, and eventually, a turbo or blower kit. (I want to get it as fast as I can before I go with forced induction) This may be for you or it may not be. I can say that you can expect to get around 50 to 60 hp with the heads I got, but it is a lot of money, so if you're not looking to spend a lot, then definately go with nitrous.

[Marauderjack]

natedog....

If you don't mind me asking...How much were the FR500 heads??:confused:

I feel like I may build a new "Blower Motor" at some point.....I have committed to keeping this car as long as I can get parts for it!!:beer:

In a nutshell it is what the CVPI should have been all along and now with the blower it is absolutely the best car I have ever owned and very comfortable for my long road trips!!:bows:

BTW.....I always listen to what Mac has to say when money (value) is concerned.....He is usually DEAD ON!!:2thumbs:

Marauderjack:burnout:

[natedog1284]

natedog....

If you don't mind me asking...How much were the FR500 heads??:confused:

BTW.....I always listen to what Mac has to say when money (value) is concerned.....He is usually DEAD ON!!:2thumbs:

Yes he is, and truth be told, I probably would never have gone this route, if it weren't for my stock heads being cracked. Ford wouldn't fix it, (hell, they wouldn't even diagnose it, I had to go to a private shop where they did a compression check). So I started thinking I should look for an aftermarket alternative. The owner of the speed shop I usually go to happened to have these heads in storage, as the guy who had ordered them never paid and backed out of the deal. He had been planning to sell them on eBay, but I bought them instead for $2500. Regular retail from Ford Racing is about $1600 for a bare set, and an additional $1700 for the cams, springs, valves, etc. (http://www.fordracingparts.com/parts/part_details.asp?PartKeyField= 5397) So needless to say, I jumped on it, if for no other reason than to make my car driveable again!
P.S. I REALLY want that intake manifold on that page too!
-Nate