How will me and the kids sneak up on the fish? Lol I will have to have the captains call. We have some pretty up tight folks here in Kansas. Good luck has come my way this week as we have gone back on overtime. I will order my GLM's next Friday then start talking cams again. I will be running a carb on this engine by the way. Overtime permitting i'll give Bob M a call about a grind for mine. I'd almost kill for 400 H.P. I have just a hair more compression on my build and head wise we are probably real close. Thanks again for the info.

You're going to have a WAY easier time tuning...at least a lot less time and money spent on shipping ECUs! That's nice. Compression should be a benefit for sure. Just make sure you have an improved intake, that's key. You probably also read about throttle body, if you can do that cheaply you're going to make a good chunk more power we found.

Just for FYI on this discussion. I just finished dynoing another 6.2 build. It's an early model 6.2 with the 4 bbl type intake. I rebuilt it with forged pistons. Raised the compression to around 9.8. Minor bowl work on the Vortec heads. We used a Comp 270 hydraulic roller. Stock exhaust with stainless replacement risers. It made 380 HP at 5700 RPM, and over 370 from 5200 on up. Torque was 423 at 3900 RPM.That leaves a 500 RPM window from 5200-5700 where the power is pretty much flat. So as with many other 6.2's I've done, that head, cam and exhaust package works really well but pretty much hit it's limit by 5400 RPM, but if you want to turn more rpm it doesn't completely just die, just no real benefit.

Hope this helps,
Bob Lloyd
Full Throttle Marine

I ran my first 383 with trick flow twisted wedge G1, 10:1 comp, CS XE264HR-10 212/218 hyd roller and the Kodiaks through the drive and when I finally put through hull on it, you know how much I gained????? Nothing but better sound. REalisitcally that was probably 330-350hp (corrected) to the prop (around 410 at the motor) and it didn't make a difference. I don't know how much more restrictive the Volvo transom is, but with a cam comparable to that I would just run it through the prop.

Here is my dyno run with the XM276HR 224/230-112 I then changed it to. This was a comparison of the dyno headers vs Kodiak manifolds (wet).



Opps... This is with my RMBuilder cam 234/240-110 .560 lift.

My 276 cam made 437hp@ 5400RPM and 479 lb-ft at 4100 rpm though dyno headers. Edel RPM and q-jet.

My early plans were EQ vortec heads and I know they work well but I got side tracked with another EQ head, the 180cc performance head and decided to try something different then the vortec route. I was re-assured the 180's would flow better and still make as much or more torque . This build is slow going on account of job change but I can kind of see the light at the end of the tunnel. I'll post numbers when I get that far along and see if I take a nose dive or if these heads live up to their billing. Are your numbers on that build tru hull or out the prop? I'd be happy with that also. I'd think the sx drive would be safe with engine maxing out at 52 to 5400 rpm.

Is wet trq and wet power out the stock exhaust and leg? Are trick wedge flo numbers comparable or better than vortec heads? I like your numbers headers or not.

Are talking about fuel injection instead of carb? If so I'm not opposed to that un-less it's considerable more expense. I have heard that efi is a lot of the reason rings and cylinders don't get washed out and wore out near as fast as back when everything had carbs. I ran a flying toilet with methanol in my 70 Cuda with 440. The fear was instant the first time I fired it up but I got past that. The acceleration was instant also. Better than any carb I had used up to that time. I do understand it was manual and not efi but I was able to better understand and accept efi as the future.

Mechanical and Electronic fuel injection has nothing to do with each other,,,,,other than fuel being added without airflow doing it.

True but both give you a feel of what fuel injection feels like as opposed to an old 4 barrel carter carb.