i need help getting a cam for a gen vi 454
 

i am wanting to upgrade the cam in mt gen 6 454, i want more power and louder pipes of course. the motor is a gen 6 454 that use to be a mpi motor but i bought the long block and i am using a carter 750 carb and 4 barrel dual plane on it along with gil pipes. i would like to avoid new springs BUT i will switch them if i need to. i am not even sure that the existing cam will even work all that well since it is for a efi motor? does anyone have a used one that will work? any recomendations on which one to buy? i have been looking at a few comp cams ones on ebay, roller cams are not cheap! but i would if possible like to put the cam in this year, if not i can do it next spring after the boat is all done and ran for awhile.

[QUOTE=regalman4925;2819717]i am wanting to upgrade the cam in mt gen 6 454, i want more power and louder pipes of course. the motor is a gen 6 454 that use to be a mpi motor but i bought the long block and i am using a carter 750 carb and 4 barrel dual plane on it along with gil pipes. i would like to avoid new springs BUT i will switch them if i need to. i am not even sure that the existing cam will even work all that well since it is for a efi motor? does anyone have a used one that will work? any recommendations on which one to buy? i have been looking at a few comp cams ones on ebay, roller cams are not cheap! but i would if possible like to put the cam in this year, if not i can do it next spring after the boat is all done and ran for awhile.[/QUOTE

We offer a number of new cam applications but I really need to know what your horsepower expectations are and what type of exhaust system you will be using. You can stay with a std hydraulic cam but will have limited horsepower gains limited only by your exhaust system choice. If you would like to discuss in person feel free to give me a call at 386-446-0660.

Best Regards,

Scott

A cam change alone is going to be good for about 30hp or 2mph. You would need new springs.

Crane Cams "731" Cam, but you'd be better off with new springs though.

Search for 731 on this site, you'll get all the info you need

Good choice if he find one right now with Crane being shut down.

i read up on the cam some, i am more confused then ever.... is this going to be a good cam for "my" application? seems like everyone has a different opinion on everything and i dont know what to use... i am not planning to go crazy on this motor but if i can get my top speed up to or above 65 i will be a very happy guy and i think i need a cam to do that?

If you can wait, the cranes will be available soon. I'm working on a stash of 731s and 741s now....

RE: cams
 

Keep me updated on those 731's Are they the 168731?? If so could you post the specs. Also are these cams hyd. flat tappet or roller?

Thanks,
John

If your in a hurry go with the XM278H cam. This is a good choice to obtain your goals. Plus a cool idle. Go to compcams.com and hit the tech page and then the audio part. Kind of fun this time of year. Gets your **** charged.
John

I am having Bob RMbuilder do a custom grind. I should be getting any day now. Give him your specs and he can make whatever you are looking for. You will need to change your springs to match your cam. Lifters may not work either for a high lift cam.

On a GEN VI the stock lifters will work up to around .550 lift, I have heard from people on here running stick lifters on the '741' cam at about .602 lift! Springs should be replaced but don't go too heavy on them.

Does anyone have an update on those 731 or 741 cams being available yet?? :drink:

How do the stick lifters change the valve opening height? Also any new word on these cams?

I think I meant stock, damn keys are close!

The stock lifters in the channels are apparently slightly too short and with high lift, can jump out or get caught on the channel edge. (please forgive my terminology I mean to say, the bit where the thingy goes, might cause another part to get stuck and screw everything up!) I don't know the actual name of the lifter hole, but if you run too much lift it can cause problems so I've heard.

If you want the BEST cam for YOUR application then RMBuilder/Bob Madara of Marine Kinetics in N.Y. is the man you want to consult with. (585) 654-8583

im getting close to starting my cam search. is this 731 cam gonna do the best for me?

Call Bob

He has done several for me. You will get excactly what you want/need the first time. He will tell you everything you need.

http://www.cpperformance.com/detail.aspx?ID=3971

This kit includes, cam, lifters, valve springs and seal, keepers and shims...

Bob is great to work with lots of help . He just sent us two. Also we just dynoed a 454 with a 741 cam in it and it made 506hp. :drink:

i put this in boating on a budget for a reason...lol i got a used 731 cam on the way!

Yeah my bad, I guess I better look for a pair of the crane #168731's too....:ernaehrung004:

Cause I'm a baller on a budget...LOL