Mopar Muscle Association UK

good job the one i bought from you was from someone i could trust then, lol.
neil.

Block is stripped and all the main oil galleries at the back opened up to 1/2”, main bearing feeds reamed out. It only had half grooved bearings, I’ll go with fully grooved. Unknown roller cam turned out to be a Crane, more suited to circle track use with a lot more compression than this engine will have so unlikely I’ll re use it. Big ‘ol deburring session next.

Meanwhile, back at the oil pan…
Todays job was making a trap door, it opens on acceleration and closes on braking in order to keep the pickup covered. It needs to move swiftly with oil surge so the door itself is aluminium rolled loosly around a steel rod to act as a sloppy hinge. It moves very freely and shouldn’t become jammed. I’ll fine tune the location before welding it in.

Finishing off mods to the oil pump. There's just enough”meat” to drill and tap the existing pick up port to 1/2” NPT, up from the stock 3/8” NPT. The 1/2” pick up tube narrows down considerably when it enters the pump, this will give me 1/2’ all the way in and out of the pump now. I spent some time deburring the ports and I think thats as much as I need to do. I’ll have to be careful not to split the pump body when installing the pickup but I have an idea for that.

In the search for just a bit more out of the current combination, I’ve borrowed some race headers for the Euronats. My street headers are 1-5/8” stepping up to 1-3/4” with a 3” collector, the race headers are 1-7/8” all the way to 3-1/2” collectors. Hopefully they’ll be more efficient at taking out the trash..

Your'e a clever sod, that trap door is a clever bit of stuff.

Can’t take any credit for that Del, its pretty much a standard mod on race oil pans, especially on roundy roundy stuff where you have oil sloshing in all directions.

Pan pretty much ready to finish weld. Pickup tacked to the 1/2” boss. I left a 1/2” drill inside it to perfectly align it while tacking it, as expected it slipped out easily afterwards so anther job jobbed…

Nice work!

Mopar Nats, car stubbonly refused to go faster than 10.93 for all my efforts but does now solidly 60ft at 1.49 and it did pull 121mph once which is a first. I also cut a .004 light which for me extremely quick. The constantly changing no wind/headwind weather was playing havoc with dial in, I only once ran bang on and that was in round 3 when I lost…

Pan and pick up TIG welded Today so that’s another bit finished.

On the verge of Tyre shake....

Not something I can feel but I’ll try 12psi next time and see how that responds.

I'm not sure a Nostagia Superstock has enough wheelspeed to produce proper tyre shake but I agree with Blue that increasing the pressure might help reuce those wrinkles (don't you dare Rob, Stu) getting under the contact patch, after all thats part of the tuning process.

No it’s not tyre shake, its just deforming the tyre excessively. Extra pressure might not fix it, the sidewalls could be worn out, there’s not much left on the tread area.