Offshoreonly.com
Page 2 of 3
1
2
3
Show 40 post(s) from this thread on one page

Offshoreonly.com (https://www.offshoreonly.com/forums/)
-   General Q & A (https://www.offshoreonly.com/forums/general-q-20/)
-   -   engines guys chine in please (https://www.offshoreonly.com/forums/general-q/337489-engines-guys-chine-please.html)

Moxy 05-18-2016 08:15 PM
Originally Posted by Tinkerer (Post 4440609)
NOPE - never been interested in putting an engine on the dyno. I know how to dial an engine in without. I never had an engine problem that the dyno would have found. Should create better than 800 HP
I am told motors made 830@5900 as best the original owner could remember lol which I am happy with but he wasn't really sure on his numbers and it appear the motors had more rpm available

thirdchildhood 05-18-2016 08:22 PM
Originally Posted by Moxy (Post 4440626)
I am told motors made 830@5900 as best the original owner could remember lol which I am happy with but he wasn't really sure on his numbers and it appear the motors had more rpm available
5,900 sounds a lot less scary than 6,500. I just have a 525 but I run it close to the rev limiter which is 5,400.

offshorexcursion 05-18-2016 08:28 PM
Sounds like a nice setup congrats and thanks for sharing!

Where are you getting your specs and info? Previous owners memory or actual build sheets. Have they ever been apart since? Hours? Would be nice to be confident about what's in there, it's not abnormal to open them up and find something different.

Black Baja 05-18-2016 08:40 PM
Originally Posted by thirdchildhood (Post 4440629)
5,900 sounds a lot less scary than 6,500. I just have a 525 but I run it close to the rev limiter which is 5,400.
I would be scared to spin a 525 also considering the have no valve spring pressure. 140 on the seat 4xx open.

Moxy 05-19-2016 05:43 AM
Originally Posted by offshorexcursion (Post 4440632)
Sounds like a nice setup congrats and thanks for sharing!

Where are you getting your specs and info? Previous owners memory or actual build sheets. Have they ever been apart since? Hours? Would be nice to be confident about what's in there, it's not abnormal to open them up and find something different.
Build sheet from Keith Eikert, recent rebuild, maybe 20 hours on them

Tinkerer 05-19-2016 07:10 AM
BIG difference between a stock Merc engine and a custom built engine.

Moxy 05-19-2016 07:14 AM
I am told that some of these parts are the best that money can buy

mike tkach 05-19-2016 09:20 AM
Originally Posted by Tinkerer (Post 4440611)
Mine has the Merlin BIG M block, Crower crank, Oliver rods, JE 8.6 comp flat top blower pistons, AFR 357 CNC'd aluminum heads, Jessel PRO shaft rockers and belt drive, 14 QT oil pans ( not dry sump) My cam has more lift than yours (.75 inch), Holley EFI sequential port fuel injection and MSD 6 ignition ( timing done by EFI ) I built this engine to some day add a M4 Procharger. ( 1400 HP ) This same engine dynoed at 1425 HP
dart makes the big m block,i did not know merlin called their block big m.

MILD THUNDER 05-19-2016 10:08 AM
Originally Posted by Tinkerer (Post 4440611)
Mine has the Merlin BIG M block, Crower crank, Oliver rods, JE 8.6 comp flat top blower pistons, AFR 357 CNC'd aluminum heads, Jessel PRO shaft rockers and belt drive, 14 QT oil pans ( not dry sump) My cam has more lift than yours (.75 inch), Holley EFI sequential port fuel injection and MSD 6 ignition ( timing done by EFI ) I built this engine to some day add a M4 Procharger. ( 1400 HP ) This same engine dynoed at 1425 HP
How do you get 8.6:1 with a flat top piston, 4.5 stroke x 4.5 bore ?

14 apache 05-19-2016 11:28 AM
Originally Posted by MILD THUNDER (Post 4440823)
How do you get 8.6:1 with a flat top piston, 4.5 stroke x 4.5 bore ?
Might be in the hole compression height like a 1075 merc.


All times are GMT -5. The time now is 11:06 AM.
Page 2 of 3
1
2
3
Show 40 post(s) from this thread on one page


Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.