New motor hopefully going in this weekend.
Bored out to 1.9+
OE Replacement Pistons
Supertech Oversized Valves
Mazdaspeed Miata Intake Cam
Gutted Intake Manifold.
Here are the pics of the gutted manifold (left) next to a stock one. I have seen dynos of this helping a lot with top end power.
New engine is in and running like a champ. While pulling out the old motor I found a lot of interesting things which in order were:
Radiator was missing a lot of coolant and reservoir dry.
Intercooler had a hole in it near a sensor I put in
Front main leaking
Only one motor mount bolted in. Other nut peaced out
Missing coolant possibly found, in the exhaust port of #1...
Rear main leaking
Anyways some pics
Raiding the old motor for parts
Engine completed. Decided to break in the motor naturally aspirated to get rid of the temptation to full throttle.
So the motor didnt survive. This was a known possible outcome for it since it was originally in a different car for a bit car and had oil pressure issues then. A few hundred miles into the breaking compression was low and it seemed to be burning oil. Leakdown also showed issues as well. Peaked in there with a borescope and saw some vertical scores. Popped the head off and it didn't seem to happy inside. So time for a new plan.
While I had the header out I decided to do something about the nasty internal welds that block a bunch of the ports.
So I welded the header from the outside and proceeded to grind the welds down. Not done yet but it looks a lot better.
Worked on my new manifold a little today. Burnt up the few tips I had and the only "hardware" places near where I live are useless chain stores. The material I am using is a little too thick for my welder which is part of the reason I am killing tips. I need to hold the gun super close or else I can not get a pool started and sometimes it would melt the wire in the tip. And yes I do suck at welding aluminum but hey I just started and it is MIG not TIG.
Ok lets try this again after waiting 4 months. Hopefully this one lasts.
9:1 CP Pistons
Msm intake cam
Supertech 1mm over valves.
Engine in the car with the mess it made in the background.
Did a little more work today. First I worked a bit on making the ports on the intake manifold smooth, got bored and decided to do something else. I then fitted the blower and worked a bit more on the supercharger manifold.
Here is the plan for the hotside piping. I need to get another piece of pipe since all the chunks I have are too short. This was the best I could come up with that still made getting to the radiator cap possible. Only problem is the headlight motor needs to be reclocked for this piping routing to work so time to modify the headlight bucket.
Got it running today. Car made 14 psi at 4000 rpm and partial throttle. The throttle response is epic with the 3 inch throttle body and larger intake. Boost will rise as fast as you can depress the pedal. Motor is still to young for doing that though so I don't know yet what the final numbers will be. Didn't have the blower alignment quite right though and the belt jumped a tooth and demolished itself.
Worked a bit on the mounts for my wing. Still need to weld it all together. I forgot to take pics so this will have to do.
The mounts are similar to the ones I built on this car.
Productive day and I didn't even have to do much work! Started off by taking the car to be tuned. It made 241 hp and 224 ft-lbs at 13 psi of boost. Ambient weather was 80 and this was after several pulls so the system was warm at that point. I also asked for a conservative tune so there is more power in there.
Then after took it over to 949 Racing to have Sonny corner balance and align the car. First alignment in 4 years lol.
I tried the car at adams kart track and the throttle was super sensitive making the car impossible to drive. There was no difference between partial throttle and full throttle. Been working on a dual throttle body setup in hopes of fixing that. I mated a volvo 960 3" throttle body to a maf adapter and placed it above the valve cover. Funny thing is this was built with parts I had laying around lol. Car is much more drivable now and it quieted the blower down. Also eliminated the surge the car had on shifts.
And another pic of dat ****
Coolant temps with the fron mount were too high so decided to switch to a V mount setup. A little bit of progress for the new intercooler.
Here is the underside of the IC. Now that I can weld aluminum I added a bung for the IAT and welded plates on to make areas thick enough to tap threads. I used to just jb weld things on and this should work much better.
Also before someone goes " blah blah rable rable bov on supercharger is stupid" you need one if you run either dual throttled or unthrottled. Compressor surge with a blower is gnarly. I am actually quite happy with this bov placement since the hotside outlet pipe blows directly at it.
There is surprisingly a decent amount of space between the hood and the core. I plan to test it and see how well it cools. If I need it to cool better, I may cut the hood. I also plan to run separate ducting to the ic so it will probably not be needed.
A little more progress. I did some testing with the IC and found it almost as efficent as the front mount. It would heat soak pretty bad at idle though so I added a fan and that seemed to fix the problem.
I also added a scoop for the IC. No data on that whether that helps or not.
I also installed a Jackson Racing header. Last time it will look this pretty or be visible since I am covering it with a TDR blanket.
Converted to sport brakes as well. Only did one drive on them and they feel like crap. Turns out the NBs uses a larger master. Makes sense since the larger calipers need to have more fluid displaced. They work right now but have to depress the pedal a ton. Need to remedy this.
Lastly I mounted an old phone inside the car to read the MS. These are not the gauges I went with since they are too hard to read. Never got another pic of the changes. The other cool thing is I can change maps with the phone. I decided now that I can do that I am going to switch to running e85. Time for more power.
Some work on the front aero to match the rear. The design is similar to the one I helped Sonny build on his msm except this one is completly suspended by cables. I found that if I ran a cable from far back all the way to the front of the bumper, (3rd pic) it pretty much eliminates any rotation of the splitter. It is pretty stable, supports my weight and quick to remove. Also I left a gap between the bottom of the airdam and the splitter which is filled by the garden edging. Still need to clean up the cut but the benifit is this allows it to flex upward a decent amount.
Finally painted and on the car. Still need to do ducting.
And some fun that helped in aero design. Drew a model in solidworks and did some testing.