Seattle Active Power GT40 - A Father/Son build

While I ended up working a handful of days over the Christmas/New Years holiday, I still managed to get some solid hours in the garage!

Firsts...inlcuding moving under it's own power. The Seattle rain briefly stopped, and while it was 40F & roads were wet, that didn't stop us!
-long engine idle
-confirmed cooling system kicks on fans & maintains temps @210F
-confirmed Alt works
-clutch works (after lots of adjustment!)
-1st, 2nd and reverse gears work
-brakes & steering works
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Shifter's installed. The main shifter does N-1-2-3-4-5 sequentially, the side one does reverse.
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Brake union...it kept leaking; once I removed it, I could see it was grooved. Replaced with a new one and the leak stopped!
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FedEx, UPS, Amazon...to many packages to build a car!
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first long engine idle run...my ~1,300CFM garage fan did a descent job at removing the exhaust.
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Rear Inboard suspenion coming along...final pushrod & crank. Mocking up the rear shock towers via CAD (Cardboard Aided Design); plan to make it from 1/4" plate, and cut out some lighting holes...
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Dash: It's not perfect, but good enough to get the car on the road. During the 1st drive I had the wires fixed w/ wire nuts, and the starter wire was loose...I stalled the engine, and end up having to jump out to re-start...figured it was time to have a real dash that I could start the car from ;)
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New Dash wired up...and quick test to confirm I didn't mess anything up.
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close up...
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Video of engine idling...finally a smooth idle, no backfiring. With the rear off the ground, I got it into 1st, 2nd and reverse. Also confirmed cooling system could maintain 210F
 
Love that my girls always ask to help in the garage...I try to keep a few projects ready for them.
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I ended up changing the intake manifold as that was giving me idle issues & backfiring...I just needed something simple so that I can get this driving. With the intake off, I decided to open the wire harness and re-route everything...the OEM harness routes evertyhing on the back of the engine, which would normally be next to the firewall; but for a GT40, it's right next to the exhaust. I had double insulated everything...but I was worried that wasn't enough.
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Even my wife joined in the fun...she was helping me bleed the brakes & Clutch!
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Just 'found' your build thread, some nice previous project choices and it continues on this car as well. Nice to see an Active car out here, look forward to watching the progress from this point. Way cool to have female family involved, great to see them out there with you, that rocks.

As I see so many great self-built cars here on the left coast it gets me wondering - is there an event that peeps like us already congregate? Or should we start one ?!
 
As I see so many great self-built cars here on the left coast it gets me wondering - is there an event that peeps like us already congregate? Or should we start one ?!
I haven't heard of any...but I would join if there was one! I always learn something when a fellow builder stops by, or I get a chance to check out someone else's build.
 

Chris Kouba

Supporter
I've virtually "met" some fantastic people around the world through this forum, and actually shook hands with several who reside here in the NW. Would definitely welcome the opportunity to grow the circle. Some time this summer perhaps?
 
On the sequential gearbox, did you find acceptable gear ratios from Mendeola. I had looked at them in the past but (at the time) felt the ratios available were too short for street use. Interested in what you found and how it applied in regards to your use parameters.
 
On the sequential gearbox, did you find acceptable gear ratios from Mendeola. I had looked at them in the past but (at the time) felt the ratios available were too short for street use. Interested in what you found and how it applied in regards to your use parameters.
We got the ratios we wanted...now whether or not they are "correct" will be seen in the coming months. I will say that Mendeola was great help with all of this...we came in with a pretty good idea of what we wanted, and they helped recommend the final details.

-1st -5th gear ratios: 2.57, 1.71, 1.19, .90, .70H
note: 5th is Helical cut gear for street use (quieter for freeway cruising)
-3.56 final drive
-We also were consicous to choose 5th gear to allow 200MPH with a taller tire...at some point we wanted to make the salt flats.

Gear Ratio to MPH.PNG



For Comparison, a C5 Z06 is:
1st Gear..... 48 mph
2nd Gear.... 69 mph
3rd Gear....100 mph
4th Gear....148 mph
5th Gear....178 mph
6th Gear....Doesn't readline, aero/power limited
 

Neil

Supporter
Peter, if you plan to take your car to Bonneville, get the latest SCTA rule book. You will be classified as "Modified Sports".
 
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