Miata Turbo Forum - Boost cars, acquire cats.

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18psi 04-03-2017 10:37 AM

Well that's a pretty important thing to leave out lol

Which makes his plot even more impressive :)

And probably why it nosedives up top like that

aidandj 04-03-2017 10:37 AM


Originally Posted by ridethecliche (Post 1402662)
I can picture colipto salivating over this thread.



How much increase would you expect with a squaretop here? Or would that be a silly option instead of just going for the modified honda intake?


Originally Posted by k24madness (Post 1402722)
Quite impressive overall power and power curve. It makes me wonder what's possible with similar turbo, VVT and intake manifold.

Kitty for you!


Originally Posted by Chilicharger665 (Post 1402886)
VVT and a squaretop for the best of both worlds?


Originally Posted by ridethecliche (Post 1402919)
You'd lose the msm intake cam then, but I think the VVT's gains are greater. I see what you're asking though re:using the squaretop to get upper end gains and using the vvt to prop up the midrange.


Originally Posted by boileralum (Post 1403080)
he has to run a 46MM restrictor on the inlet side of the turbo, which is why more boost didn't do much for him.

I don't want to say I told you so but...

codrus 04-03-2017 11:40 AM


Originally Posted by aidandj (Post 1403084)
I don't want to say I told you so but...

...and you guys were worried about a 2.5" inlet being too small. :)

--Ian

18psi 04-03-2017 11:48 AM

I was gonna post that in his thread :laugh:

Savington 04-03-2017 01:34 PM

lololol that dyno chart is with an inlet restrictor? Holy lol

psyber_0ptix 04-03-2017 01:47 PM

<3 <3 <3

With those numbers, I feel as though my car is lacking. Time to get that knock sensor working and revisit the dyno.

18psi 04-03-2017 02:03 PM

e85 is the secret ingredient here

ridethecliche 04-03-2017 04:24 PM


Originally Posted by aidandj (Post 1403084)
I don't want to say I told you so but...

Shaddap ya meaniepants!

:rofl:

fourwhls 04-05-2017 05:50 AM

Thanks Rich!

The car is built to the FP rule set so I do have some limitations.
  • 46mm restrictor
  • block and head that came in the car stock
  • 10in wide wheels (I can go wider but there's 100lb penalty for anything wider than 10in.)

fourwhls 04-07-2017 04:31 PM


Originally Posted by codrus (Post 1402658)
Wow, 11:1 and 20+ psi. E85 is magic stuff. Are you willing to share anything about how much timing you're running? Is it a Megasquirt?

--Ian

It's running a Haltech Elite 1500. Timing is 15deg up top, but I don't know how that equates to Megasquirt timing.

aidandj 04-07-2017 04:48 PM

It's most likely the same.

Leafy 04-07-2017 09:24 PM


Originally Posted by fourwhls (Post 1404421)
It's running a Haltech Elite 1500. Timing is 15deg up top, but I don't know how that equates to Megasquirt timing.

MS timing = actual timing if you set it up right. I dont know enough about haltec to say the same.

fourwhls 03-24-2019 11:24 AM

Damn, I've been a slack ass and haven't updated this thread in a long time. I did quite a bit of work over the winter to make it a little faster and also look better.

Appearance Update:

I bought an overfender kit from CarbonMiata.com. I was not a huge fan of their front bumper, so I chose to build my own front connection pieces to tie the flares to a stock bumper instead. This was both a great learning experience and a failure. I finally gave in and ordered the front bumper and connection pieces from CarbonMiata.

The plugs I made to tie the flares into the stock bumper turned out pretty well. It was a lot of work and took several attempts to get it right, but I was pretty happy with the final product. The problem that made me pull the plug was when I started the fiberglass process. I put the gel coat over the plug and it ate right through the primer and into the foam of the plug. I didn't think the type of primer was that big of a factor, but indeed it was.

I then hit the easy button and ordered the bumper/connection pieces.

I will say, the fit and finish of the CarbonMiata kit was the best I've ever worked with. I've installed at least a half-dozen flares on various cars, and this was the best fitting kit I've ever worked with. I only had to massage one part to make it fit to my liking, the rest bolted on and mated up perfectly.

https://static1.squarespace.com/stat...G?format=1000w

https://static1.squarespace.com/stat...G?format=1000w

https://static1.squarespace.com/stat...g?format=1000w


After the kit was completely installed, I pulled it back off and started another process I've never done before, painting a car. This time I read the instructions thoroughly and made sure I used products that were compatible with each other. I ended up shooting it with a single stage paint over top of an epoxy primer. The paint and primer was PPG shop line and was very reasonable. It cost a little over $400 in materials. I used a Harbor Freight purple HVLP gun and it worked well. At $13 each, I bought 3 and just threw them away instead of cleaning after each use. I chose Viper Green which is a Porsche color that I originally saw on a GT3 RS. It's definitely not a show car, but it turned out pretty well.

Will I ever do this again?....maybe, but definitely not in my garage. I'm going to be cleaning up green overspray for the next 2 years.

https://static1.squarespace.com/stat...g?format=1000w

https://static1.squarespace.com/stat...G?format=1000w

https://static1.squarespace.com/stat...g?format=1000w

https://static1.squarespace.com/stat...g?format=1000w

https://static1.squarespace.com/stat...g?format=1000w

https://static1.squarespace.com/stat...g?format=1000w

https://static1.squarespace.com/stat...g?format=1000w

https://static1.squarespace.com/stat...g?format=1000w

https://static1.squarespace.com/stat...g?format=1000w

https://static1.squarespace.com/stat...g?format=1000w

fourwhls 03-24-2019 11:25 AM

Suspension / Tire-Wheel Update:

I decided to swap out the delrin bushings for spherical bearings. I created designs in CAD and sent the drawings out for quote. The prices weren't bad, but it ended up being about the same price for the Keisler Automation bearing. These were already proven and he had them in stock. I pulled my arms and sent them down to TN and in less than a week, I had them back in my hands with sphericals installed.

https://isteam.wsimg.com/neb/obj/Nzc...rs=w:600,h:600

https://isteam.wsimg.com/neb/obj/Nzc...rs=w:600,h:600

https://static1.squarespace.com/stat...g?format=1000w

Once I got the suspension installed again, I looked at the front sway bar and was really not happy with the stiction of it compared to the control arms. I'm using a hollow Racing Beat bar with the poly bushings that comes with them. Being the stubborn engineer that I am, I wanted something better and decided to design a set of custom bushings for this bar. I opted to use a polymer that is basically an oil impregnated delrin. It should provide the freed up movement that I want, and being oil impregnated, it shouldn't require much, if any, maintenance. I can't really give any feedback one these yet because they have only been on the car for a day.

http://www.racingbeat.com/images/items/54106.1.jpg

http://www.racingbeat.com/images/items/54106.2.jpg

https://images.squarespace-cdn.com/c...QIGBHJ7V060WX/

https://images.squarespace-cdn.com/c...TUT524GDBFLVX/

Last year we ran 275 A7s on 15x10s, this year we are giving the 295s a shot. I opted to put them on 15x11s even though the 15x12s are likely the better option. The 11s require an additional 50lbs of ballast, going with the 12s will be another 50lbs pushing me over the 200lb of ballast mark.

On the left is 275s on 10s, right is the new 295s on 11s.

https://static1.squarespace.com/stat...G?format=1000w

Stacked next to each other.

https://static1.squarespace.com/stat...G?format=1000w

Leafy 03-30-2019 09:13 PM

I think you need a gendron bar to go with those spherical arms now. Its really crazy how going to real bearings on the sway bar increases front grip even with the same stiffness of bar.

AutoFreak57 03-31-2019 12:23 AM

You make a lot quicker progress than I do...

TNTUBA 03-31-2019 02:59 AM

I've driven it. It's a HOOT.

Looks as good as it runs.

I still want to do a drag race thing at one of the 5 events a year we run at drag strips. It would be cool to see how the different setup perform in a straight line.

fourwhls 04-02-2019 09:05 AM


Originally Posted by Leafy (Post 1528947)
I think you need a gendron bar to go with those spherical arms now. Its really crazy how going to real bearings on the sway bar increases front grip even with the same stiffness of bar.

im hoping the new bushings I had made provide the same results.

KevinK121 04-02-2019 11:05 AM

This makes me feel things that mechanical things shouldn't make a person feel.

Also... Shrek is love, Shrek is life.


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