Vehicle Owner

Member ID: mattsterRX7

Location: Grand Rapids, MI

Vehicle Info

1986 Mazda RX-7

Bragging Rights

  • 1/4 Mile0 sec @ -1 mph
  • 0-600sec
  • Top Speed-1mph
  • HP325
  • Weight2800lbs

Major Upgrades

  • turbo
  • nitrous
  • bore increase
  • port and polish
  • supercharger
  • extrude honed
  • stroke increase
  • engine swap

Ratings

    • Currently 3.3/5 Stars.

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Last updated: Jun 18, 2009

Hits: 96,482

Matt’s Mazda RX-7

  • Currently 3.3222222222222 /5 Stars.
49 guestbook comments

Page 01: Introduction
Page 02: White RX7
Page 03: Green RX7
Page 04: Engine
Page 05: Let the fun begin!
Page 06: Engine bay work
Page 07: The V8 drop-in
Page 08: IT'S ALIVE!!!
Page 09: Clutch & Radiator
Page 10: Driveshaft & Exhaust
Page 11: RX Unleashed
Page 12: Dyno and Weigh-in
Page 13: Alternator, Fans, Gauges
Page 14: SUSPENSION!
Page 15: Seven Not Stock, 2006
Page 16: Paint & Quarter Mile
Page 17: Saying Goodbye
Page 18: Conclusion.

The engine and tranny were in, this met my Christmas break goal... I looked at the calender and realize I still had a week to go.. so I just kept going. The next logical step in my mind was to begin rewiring the engine. What I basically did at this point was layed out the harness (it was a rats nest) on the ground and labeled each connector according to www.shbox.com (a VERY helpful website). Once the harness was installed, I aimed at getting the starter to turn over as an easy starter/confidence gaining project. This was actually pretty easy and had the engine turning over, very loudly I might add. Next I wired up the essentials to and from the computer according to Granny's instructions. The LT1 computer was put where the stock Mazda computer was origionally located beneath the passengers kick panel. The wires were fed through the gommet on the firewall where the old 13B harness went through.

mattsterRX7's 1986 Mazda RX-7

Next, I focused on getting fuel to the engine, this was done simply with some HP fuel hose from the filter to the regulator and rails. Next I modified the fuel pump so that it pumps when the key is on, it doesn't rely on anything else but key position... I knew I had it right when I could hear the powerful pump buzzing in the back.

What are the chances that a first-timer like myself could have the engine running on the first try? Not likely :), I cranked it over with no success. After a day or 2 of troubleshooting, I found two critical errors. First the fuel lines were mixed up, fuel in and fuel return were swapped (quite messily, I might add... oops). It is almost ironic that this was the same problem with the first white car, and I laughed at the previous owner for missing such an obvious error. Second, I was not getting the required voltage to the injectors, this was simly fixed by clumping up all of the "pinks" (you know what I mean if you've ever worked with a latemodel 350 harness) and connected them to switched ignition.

The day before I had to leave back for school, only 3 weeks since I started, I had two buddies over to see the progress. The car hadn't started the night before, for whatever reason, so I asked them if they'd like to hear it just crank for a couple of seconds. I twisted that key like I had done so many times before, but for some reason this time the engine decided to light up! There wasn't even headers on the engine, so you can imagine that it was the loudest, meanest, baddest assed sounding thing I had heard in my recent memory. My friends eyes were saucers for the 4 seconds before the VATS kicked in cutting off the fuel. My mom came running out into the garage thinking something had exploded! I changed my underwear, and decided to do try again... sure enough, it started right up again, what an exciting day. You know, I haven't been around all that long, but I would venture to say that a first start up after such hard work has got to be one of the greatest feelings ever.

mattsterRX7's 1986 Mazda RX-7


mattsterRX7's 1986 Mazda RX-7

Here are some pictures of the engine in its running form, the green tags labeling the connectors are still on. These pictures actually show the paint color quite well... just in case you didn't believe me that its dark.

mattsterRX7's 1986 Mazda RX-7

Here's a pic of me looking like a huge nerd. It's also the night of putting the car back in storage for the spring semester. It broke my heart to have to leave so soon after the day of excitement... but at the same time, it was SUCH a relief to have it running before I left instead of stressing over what was wrong for a whole semester!

Guestbook

Displaying entries 1-5 of 49

Pivotto  

Posted by: Pivotto

08/22/2009 01:52PM

I am super excited to see how you're 3rd Gen. comes along, good luck man.

jmiller18  

Posted by: jmiller18

06/15/2008 11:45PM

DUDE HELP ME OUT. YOu seem very intelligent about this. I have a V8 myself and am looking to get some better times. Im only running a 14.32 at 103 and i cant get any better but the mods prove to be around 400hp at the crank. Shoot some ideas my way please and thanks.

dough957  

Posted by: dough957

06/03/2008 10:05PM

hey man whats up with u...most peoples pages just have stupid useless wording that waste your time, but i just read like 15 pages n every bit was worth it---u did a hell of a job on that rx7, i found your page by searching lt1 motor swap in the lil search engine thing--- what are some pointers i need to know? i already pulled the huge ass 472 out of the caddy, i wanna do a ls1 or lt1 swap i know it's lighter and gonna have more horse power, but i think the lt1 is gonna b easier to find because it's a zillion bubble caprices and impalas in the dc,md,va area---can you kinda give me a run down of what i have to do to make it work

92purplebubble  

Posted by: 92purplebubble

04/07/2008 07:53PM

Very nice i was thinking about doing this setup but the car rides good and motor is still good but when itt goes trust me ill drop a 421 carburated v8 with a turbo 400 and a 5500 stall

GordiniRX7  

Posted by: GordiniRX7

03/25/2008 08:22PM

Dude both your cars are bitchin'!
I cant wait to see your FD done!!!
Nominated for showoff!!!
take a look at my fc ant tell me what you think about my plans,after all, Im only 15

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Vehicle Owner

Member ID: mattsterRX7

Location: Grand Rapids, MI