Calling all PCM GT40 Owners

keep the vids comming!

It's the 3.5" exhaust manifolds reduced down to two 3" "mufflers" that were already in the boat from when it had the carburated 351 in it. Then it just runs out the back with rubber flappers on the tips. Nothing real special. Does it sound odd or something? I'm a chevy guy, so it sounds like a ford to me. hehe.

nice! good work.

Thanks Brian...and I don't think the love ever left; maybe just a group of guys who haven't gotten their overdue exhaust fix?!!? LOL

nuttyskier2002 wrote: I haven't posted on this site in quite a while and wasn't sure if I would again

?!!? Brian, you would be sorely missed! Besides, there's a piece of you in the pumpkin and I thought you'd want to stick around to see if I really did put the intake on bacerds.

And the operative part of this phrase...'brand X boat'... is boat!

boat dr wrote: fredo, you are WRONG, people skills, Chris is a little shy in that department. Boat knowledge and the components that all fit together to form that money pit where we chunk our change , this is home turf...... Every newbie that comes here gets the same treatment,being that you own brand X boat does not help your case with him at all. I have said it before and it is worth repeating, he is the guy that will call you out and give you a good CUSSING,and show up at you doorstep Saturday AM and help you rebuild your motor....... No praise just facts.........Boat dr

I haven't posted on this site in quite a while and wasn't sure if I would again.....but this time I couldn't resist. Doc I have the utmost respect for you as you seem to be a true professional. I'd surely like to meet you some day and shake your hand. That goes for many others on this site as well. But I'd like to come to the defense of those boating in other than CC boats (myself included) just because of this: You guys who are CC owners should be thankful that there are ones like us buying so called "brand-X" boats and here's why. It keeps other boat builders it business. And that creates competition. That keeps prices in check and well as quality and that is the American way!

Brian

Fredo, Welcome to the site. Sorry you had to go through that nonsense, read between the lines and let it go. Hope M3fans' pics help you out, he's a passionate GT40 guy.

Here you go.















If you look really closely you can find most of your answers.

I would say correcting 79's spelling is definitely barking up the wrong tree.

I am missing something or does not the first post make it clear that he is using a motor and harness out of an 01 Nautique. Its a good question and the right place to ask it.   

fredo, you are WRONG, people skills, Chris is a little shy in that department. Boat knowledge and the components that all fit together to form that money pit where we chunk our change , this is home turf......
Every newbie that comes here gets the same treatment,being that you own brand X boat does not help your case with him at all.
I have said it before and it is worth repeating, he is the guy that will call you out and give you a good CUSSING,and show up at you doorstep Saturday AM and help you rebuild your motor.......
No praise just facts.........Boat dr

M3Fan wrote: fredo, save your breath- it's not worth it. This is 79's way of breaking in new members. Stick around and I'll have your answer when I get back home.

no just made a simple statement that the boat's harness may not be the same and he gets all bent out of shape, oh well nothing I can do about that Joel.

fredo wrote: Man, you ARE a badass. Look, I know enough about fuel injection to know that MOST systems have a return line. I was simply asking because the GT40 service manual makes reference otherwise. That's great you know a lot about fuel injection. I was simply trying to see if someone who owned one could provide me with a little help to save me some time. Diagnosing 4 sending units isn't a major deal, but I figured if I could rule out the two for the computer right off the bat, then I could move on to the next step. It's not that I didn't remember where they went, it's the harness was already off the motor when I got it. Sorry if you think I "wear my emotions on my sleeve", but you jumped in acting like a prick right off the bat simply because I don't own a nautique, so sorry if I seem short with you but you aren't helping. I'm pretty sure the title of this post is "calling all GT40 owners" not "calling all pompus pricks that think they know everything"

again you made assumptions that where wrong to start with, it's common on here to jab the other guys boat's as it is a CC site, so if you wheren't so uptight then maybe you would have taken a lighter approach like most of the other guys that don't have CC's on here and been light hearted about it but then maybe you all ready stated a fact about your self how do you spell that word I'm thinnking of hipo... or pomus what... Sorry guess I'm not at your level.

fredo wrote: 79nautique wrote: just because it is a PCM doesn't mean anything might have a lot of common stuff but the customer can and does request changes to meet their design specifications. So just because they have the same pin outs doesn't mean they have the same location or number of sensor's where the wires are going. It is also possible the the resistance of the sensors can be different too. It really shouldn't be that hard to figure out if they do match up then the wores so lay out exactly where they should go I know that was the case when I replace the harness on my CC years ago, didn't need a wiring diagram to figure it other than back by the curcuit breaker. Look, you might have rewired your nautique and you think that makes you some sort of wiring expert, but rewiring a carbed v8 in a boat from the late 70's is a little different than what I'm doing here. You don't think I've thought there might be differences in pinout and resistance on the sending units? I realize they might not be the same sending units. Once again, that's partially why I want to know what wires go to which sending unit. The GT40 has dual sending units. One set for the computer, and one set for the instrumentation. The wiring diagrams do not specify which sending unit goes to which and they don't look the same. So I want to know which wires go to which sending units so I can verify that my gauges will in fact work, or if I'm going to have to change them. Thanks for the criticism though.

you assume that I know nothing about EFI motors and your completely off base with that assumption. I know quite abit about motors as a whole whether it's an old carb'd motor or a fuel injected motor, be it TBI or a MPI system they are all basicly the same one just has more injectors and more sensors too. So think what you want, your the fool that thought the intake needs to be vented to the gas tank, But guess you do know more about EFI motors than I might but then all fuel injected/high pressure fuel systems have a return line to the tank basic 101 EFI and it's not because of emission standards.

Besides I've never did any design work for a fuel injected motor's engine management system at all, just a couple hundered thousand or maybe a couple million samples that are on the road today and might be in your drive way too but then I'm sure you don't buy American so maybe not.

but then again I would have just grounded the lead to see if the gauge moved or not to figure out which one it was since I wasn't smart enough to remember where they went. so don't ware your emotions on your sleeve and start complaining about me because you are barking up the wrong tree.

m3fan, thanks for checking for me. I figured that had to be a fuel return line coming off of the FCC, but I swear I remember reading something about that line being a vent to the intake manifold somewhere in that manual. Maybe I misread something.