Nice work! I ended up polishing my combustion chambers too. I also went as far as removing that little nub between the exhaust valves I did this November 2017, the engine's first run was January 2018 I haven't noticed any performance loss after with my normally aspirated Marauder. Two and a half years later and nearly 50,000 HARD miles on the heads and 111,000 miles total on the stock untouched lower-end it still dynoed out at 258 rwhp @ 5,100 rpm untuned and on top of that it hit the factory 125 mph speed limiter (still had 1,000 rpm to the red line) in third gear on the dyno so technically it's making not a bunch more but probably 15-25 hp more if it wasn't limited. So considering the nearly 25% drivetrain loss that puts it nicely above the stock 302 crank horsepower the Marauder was rated at...
Thanks for watching! If you have any pictures I'd like to see them. I think unshrouding the valves definitely helps and these 4V's really do last forever. Marauders are great cars and make very nice sleepers! Thanks again!
Nice work! I ended up polishing my combustion chambers too. I also went as far as removing that little nub between the exhaust valves I did this November 2017, the engine's first run was January 2018 I haven't noticed any performance loss after with my normally aspirated Marauder. Two and a half years later and nearly 50,000 HARD miles on the heads and 111,000 miles total on the stock untouched lower-end it still dynoed out at 258 rwhp @ 5,100 rpm untuned and on top of that it hit the factory 125 mph speed limiter (still had 1,000 rpm to the red line) in third gear on the dyno so technically it's making not a bunch more but probably 15-25 hp more if it wasn't limited. So considering the nearly 25% drivetrain loss that puts it nicely above the stock 302 crank horsepower the Marauder was rated at...
Thanks for watching! If you have any pictures I'd like to see them. I think unshrouding the valves definitely helps and these 4V's really do last forever. Marauders are great cars and make very nice sleepers! Thanks again!
@@MikesGarageRoute66 oh yeah I’ve got pictures lol, how do you want to get them?
@@MikesGarageRoute66 my email is my name oneword all lowercase @iCloud.com
@@ProjectMercuryMarauder Instagram would be cool. I believe it is __mikes_garage__ Thanks for sending them!
Wow you do really good work! The pictures were amazing!
Looks good man!
Thank you!
@@MikesGarageRoute66 Just subscribed.
Well done 👍
Thank you 👍
Any power gains ? My 04 mach 1 is giving up on me and will be rebuilding the engine soon .
Yes but only if you do long tube header also or have a power adder. Stock exhaust manifolds and NA will give zero hp