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Re: 502 performance from a 7.4?

Posted: Wed Oct 31, 2018 7:12 pm
by akorcovelos
Is there anything cooler than NOS parts? Still in the original box from the early 90s.
IMG_3150.JPG

Re: 502 performance from a 7.4?

Posted: Mon Nov 26, 2018 2:39 pm
by akorcovelos
Cyber Monday rocks! Got $75 discount on the retune from Whipple. ECU is shipping out to them tomorrow, should have it back in a couple weeks!

Re: 502 performance from a 7.4?

Posted: Mon Nov 26, 2018 5:52 pm
by Big Block Power
akorcovelos wrote: Mon Nov 26, 2018 2:39 pm Cyber Monday rocks! Got $75 discount on the retune from Whipple. ECU is shipping out to them tomorrow, should have it back in a couple weeks!
Boy your scoring today. Lol
Keep it up.

Re: 502 performance from a 7.4?

Posted: Tue Nov 27, 2018 3:27 pm
by akorcovelos
Got 13" of heavy snow in 10 hours sun-mon, schools were closed, so took a snow day with the kids and spent money online. :) The only thing I couldn't find discounted was the drive shower. Did pretty good yesterday. Christmas shopping is DONE, lol.

Re: 502 performance from a 7.4?

Posted: Tue Dec 18, 2018 3:20 pm
by thunder550
So did you test it yet? :D

Re: 502 performance from a 7.4?

Posted: Tue Dec 18, 2018 6:13 pm
by Big Block Power
thunder550 wrote: Tue Dec 18, 2018 3:20 pm So did you test it yet? :D
Hey I could meet him and pick it up and bring it to Az with me in a couple of weeks for testing!!! Just saying!!

Re: 502 performance from a 7.4?

Posted: Tue Dec 18, 2018 7:27 pm
by thunder550
Big Block Power wrote: Tue Dec 18, 2018 6:13 pm
thunder550 wrote: Tue Dec 18, 2018 3:20 pm So did you test it yet? :D
Hey I could meet him and pick it up and bring it to Az with me in a couple of weeks for testing!!! Just saying!!
Just make sure it's set up for a 502 and I'm in :D

Re: 502 performance from a 7.4?

Posted: Tue Dec 18, 2018 7:29 pm
by Big Block Power
thunder550 wrote: Tue Dec 18, 2018 7:27 pm
Big Block Power wrote: Tue Dec 18, 2018 6:13 pm
thunder550 wrote: Tue Dec 18, 2018 3:20 pm So did you test it yet? :D
Hey I could meet him and pick it up and bring it to Az with me in a couple of weeks for testing!!! Just saying!!
Just make sure it's set up for a 502 and I'm in :D
Oh yea you anyway have the 502 he's got the 454 mini. I think you anyway have that ecu. Was a good thought though.

Re: 502 performance from a 7.4?

Posted: Wed Dec 19, 2018 11:21 am
by akorcovelos
Hey, doesn't the saying go 'it's not the size, it the motion in the ocean' or something? ;)

ECU is still at Whipple, and the water around here is pretty firm for testing anyway...
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...not that I'm counting.

Re: 502 performance from a 7.4?

Posted: Wed Dec 19, 2018 2:27 pm
by thunder550
:lol: :lol:

Re: 502 performance from a 7.4?

Posted: Wed Dec 19, 2018 3:05 pm
by AsLan7
akorcovelos wrote: Wed Dec 19, 2018 11:21 am Hey, doesn't the saying go 'it's not the size, it the motion in the ocean' or something? ;)

ECU is still at Whipple, and the water around here is pretty firm for testing anyway...

Capture.PNG

...not that I'm counting.
That's awesome akor! :lol: :lol:

Re: 502 performance from a 7.4?

Posted: Sun Jan 20, 2019 12:06 am
by akorcovelos
Ironic this showed up during the worst snow storm of the year, but it brought a smile to my face.
E6B0B232-9947-4361-86BE-0563E6FD2A55.jpeg
3A413EFE-11EC-4285-8480-6CB7CE68BCCE.jpeg
60 days, come on spring!

Re: 502 performance from a 7.4?

Posted: Sun Jan 20, 2019 9:35 am
by Big Block Power
akorcovelos wrote: Sun Jan 20, 2019 12:06 am Ironic this showed up during the worst snow storm of the year, but it brought a smile to my face.

E6B0B232-9947-4361-86BE-0563E6FD2A55.jpeg
3A413EFE-11EC-4285-8480-6CB7CE68BCCE.jpeg

60 days, come on spring!
Cool. Do you have a good baseline yet? Or do you have to get one yet? Can't wait to hear the diff. I wish someone was good at doing the Volvo ecu.

Re: 502 performance from a 7.4?

Posted: Mon Jan 21, 2019 12:55 pm
by akorcovelos
Yep, one of my first posts after joining the site, lol.

Here's the run down:
1996 252
7.4 Magnum MPI
Bravo 3
1/2 tank of fuel
2 people in the boat, no other gear.
Ambiant air temp 58*
Empty lake, water dead calm.

Time to plane: 5 seconds
Slowest planning speed: 16mph @ 2200rpm
Cruise speed: 48mph @ 4000rpm
Top Speed: 57mph @ 4900rpm

I was impressed overall with the performance of this boat, especially with 900 hours on the clock. Also pretty surprised at how accurate the dash speedo is compared to the GPS speedo. They were within 1-1.5mph through the entire test.

viewtopic.php?f=47&t=1933

Re: 502 performance from a 7.4?

Posted: Mon Jan 21, 2019 6:55 pm
by Big Block Power
Heck I can't Remember what boat I bought last week much less that. Lol
What prop are you running. Have you played with them more. Did you get any of them tweaked yet?