DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Grassroots Motorsports challenge car

Old 06-22-2007, 09:27 PM
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Originally Posted by Arkmage
agreed... MS for the win. In fact... diyautotune may be willing to help you out on the project in exchange for advertising? this would provide an excellent opportunity to get their name out to the proper (read: cheap) crowd that wants power.
Isn't this against the rules? Couldn't you just call Chevy and get an LS-1 for $5 and put it in if it wasn't "illegal"?
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Old 06-23-2007, 12:55 PM
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Originally Posted by rmcelwee
Isn't this against the rules? Couldn't you just call Chevy and get an LS-1 for $5 and put it in if it wasn't "illegal"?
I'm pretty sure they can give you stuff, but you have to claim it on your expenses at fair market value. So if you happen to already have a car lying around the yard you can't just say "I got it for a dollar from a friend". You have to claim it at fair value of $500 or whatever.

I was just suggesting it would save him the out of pocket expense, it would still count towards the "cost" of the car for comp.
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Old 06-24-2007, 11:59 PM
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Originally Posted by JDMAflac
can you both do a update on your cars, not sure if you want to share your secrets though. i love builds like these.
I'll be starting a build thread soon on another forum. FWIW, it'll be considered the third installation of the set. I'll probably end up copying it here as well . Briefly, there isn't much left that can be fit into my budget unfortunately, but my primary focus, currently, is the completeion of a new downpipe with divorced WG (~60% complete). Following that will be the addition of a catalytic converter so that I can have her legal and licensed for the streets (read: emissions testing...I didn't say that).

The new clutch is sitting on the pass. seat awaiting installation.

Originally Posted by Arkmage
I'm pretty sure they can give you stuff, but you have to claim it on your expenses at fair market value. So if you happen to already have a car lying around the yard you can't just say "I got it for a dollar from a friend". You have to claim it at fair value of $500 or whatever.

I was just suggesting it would save him the out of pocket expense, it would still count towards the "cost" of the car for comp.
Absolutely correct .

Last edited by kcbhiw; 06-27-2007 at 11:36 PM.
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Old 06-25-2007, 04:42 PM
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Here's a link to our build-up:

http://tampabaymiatas.net/forum/viewforum.php?f=30

Nothing much secret about our plans:

1) Lighten the car as much as possible

2) Add turbo (plus all the crap associated with such endeavors - I/C, piping, BOV, etc.)

3) Test & tune

4) Answer the eternal question of suspension. Go with a used performance spring/shock setup? Use the coil-overs I have in the garage? They're cheap, but what are the spring rates (unknown)? If I do find out what the rates are, can I get a suitable shock to match? How much $$$?

5) Answer the eternal question of wheels & tires. Do we keep the stock 'Daisies' (free) or go with lightweight 15" wheels ($$)? 15" wheels should add a greater contact patch. Azenis or used racing tires? In which size? Questions, Questions
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Old 06-25-2007, 04:45 PM
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daisies with rt-615s. keep it cheap. however, the difference between the 195 60 14 and 205 50 15 is 1" 6.6" vs. 7.6"
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Old 06-25-2007, 06:45 PM
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Originally Posted by Braineack
daisies with rt-615s. keep it cheap. however, the difference between the 195 60 14 and 205 50 15 is 1" 6.6" vs. 7.6"
Daisies with DOT3-legal racing tires = more goodness. It all depends on what our budget will allow after suspension. I have a set of used RT-615 I got for $100, but I may have to allow a little for for fair market trade value.
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Old 06-25-2007, 06:54 PM
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they are only 60 each. given the fact that they are used, i dont see the problem.
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Old 06-25-2007, 06:57 PM
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you might consider a set of ebay coil-overs.. there have been a few people doing well with them over at m.net
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Old 06-25-2007, 07:58 PM
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yeah, some are something like 450/300lbs.
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Old 06-25-2007, 08:56 PM
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My project has been moving along slowly. As of last week the engine is out and on a stand and i'm starting to clean out the engine bay to get it ready for paint. Once I paint the car I have a huge pile of parts ready to go on.
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Old 06-25-2007, 09:56 PM
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I have a set of Tom Motorsports coilovers in the garage. I am taking them to a shop to get the spring rates dyno'd. After that, I will know what kind of shock I'll need to match up to them.
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Old 06-25-2007, 09:59 PM
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Originally Posted by Pseudosport
My project has been moving along slowly. As of last week the engine is out and on a stand and i'm starting to clean out the engine bay to get it ready for paint.
Mine is on a stand as well. It has a chewed up keyway and we plan to weld the new key in place. The engine bay is in good shape except for under the brake master cylinder. I need to hit that with rust-stop paint.

I have a set of cheap-a$$ coilovers in the garage. I am taking them to a shop to get the spring rates dyno'd. After that, I will know what kind of shock I'll need to match up to them.
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Old 06-27-2007, 11:34 PM
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Originally Posted by Hammerhead
The engine bay is in good shape except for under the brake master cylinder. I need to hit that with rust-stop paint.
I had the same problem, as do many Miatas. Since brake fluid will impregnate metal, be sure to remove all the paint from the affected area, and clean thoroughly with some sort of solvent. I cleaned/sanded/cleaned/sanded until my arm was numb. If you don't, the paint you apply in that area won't adhere long and you'll be back to square one.


Originally Posted by Hammerhead
I have a set of cheap-a$$ coilovers in the garage. I am taking them to a shop to get the spring rates dyno'd. After that, I will know what kind of shock I'll need to match up to them.
Be sure to include that in the budget j/k. Most of the 'Ebay Special' coilovers I've come across are rated in the 450F/350R range. Spring dyno's usually prove otherwise, hehe.

Is there another link to your build up anywhere? The Tampa forum requires registration. Boooo.

I'm really looking forward to some Miata competition. So far it looks like there will be 3 turbo Miatas there! That's pretty bad-*** if you ask me.
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Old 08-26-2007, 12:09 AM
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Bump! How are your Challenge builds coming? 5 weeks left!
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Old 08-26-2007, 01:23 AM
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I'm really starting to freak out. This past month I spun a rod bearing in my WRX so some time and money had to go into that. The Miata is still completely apart and is almost ready for paint. I was hoping it would be a simple scuff and paint but I later found out that parts of the car had been repainted 3 times and that the whole right quarter was bondo. Tomorrow I hope to finally get the thing in primer then maybe get it painted the following week. Hell even if I get just the engine bay painted the engine can go back in. I'm not sure if the turbo is going to happen this year. I really just want to show up and have fun. Even if the car is not done I'm bringing something. I already took the time off from work.


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Old 08-26-2007, 07:44 AM
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You should try to at least make it. I should be there with my buddies and a turbo crx that has been in process. Assuming motor holds up
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Old 08-26-2007, 11:28 AM
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I just sent the the entry form and money plus we already reserved a hotel room. I'll be there with or without the miata.
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Old 09-16-2007, 03:59 PM
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Originally Posted by Hammerhead
Mine is on a stand as well. It has a chewed up keyway and we plan to weld the new key in place. The engine bay is in good shape except for under the brake master cylinder. I need to hit that with rust-stop paint.

I have a set of cheap-a$$ coilovers in the garage. I am taking them to a shop to get the spring rates dyno'd. After that, I will know what kind of shock I'll need to match up to them.
Have you welded that keyway yet? I was thinking of doing the same thing and wanted to know how it came out. I'm not sure if I'm going to weld the key in or just build up the keyway and grind it out so the key fits snug.
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Old 10-04-2007, 01:10 AM
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The truck and trailer are loaded. The Challenge Miata is ready to go in all of it's 15PSI glory . I look forward to meeting you guys. Safe travels and good luck!!
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Old 10-04-2007, 02:38 AM
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Unfortunately I will not be able to attend this year. There were a few small problems with the Miata that i did not get worked out in time. Also i found out last weekend that my girlfriends aunt was shot and killed in Afghanistan. I'll be attending her Funeral this weekend and spending time with the family. Hopefully with some luck and an extra dollar in the budget you will see me there next year.

http://www.arlingtoncemetery.net/cmdurkin.htm
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