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Go_Gators
Go_Gators Reader
8/16/18 7:40 a.m.

something to consider when configuring the exhaust.... you no longer have a body to muffle the noise from the exhaust to the driver... i am using the aftermarket exhaust system that was on my  car before conversion. it was perfect with the car body on, even with the convertible top open. however... now, with nothing really between the exhaust exit and the driver it is way too loud. Even with foam ear plugs in, if i drive for more than ~30 minutes, i get a tone/ringing sensation in my ears. so, if you are going to drive it much, plan on resonators and mufflers! 

Woody
Woody MegaDork
8/16/18 11:19 a.m.

Somehow I missed this when it first popped up, but I've been thinking about Vette Karts around the clock for the past few days, so I'll be following closely. Obviously, it takes a lot more work to do it right than to just hack away Roadkill style.

Does anyone actually sell a Vette Kart Excocet type tube frame yet?

lotusseven7
lotusseven7 Reader
8/19/18 1:15 p.m.

   We have front suspension! I decided that the there were only 2 ways to get the chassis at the correct ride height, eliminating the front transverse mounted springs and mounting coil overs. The problem was in the packaging. Aftermarket coil overs are considerably wider than the stock shock. Here is my take on solving the problem. 

 

1. The bottom mount was pretty straight forward thanks to some coilover brackets from A&A Mfg. Their catalog is incredibly useful when building any racecar, it saves countless hours of fabrication.

 

2. Finding a spot for an upper mount. Since the chassis has those 2 additional forward rails, it was the natural spot to see if the upper shock mount would work there. It did! Again, another coilover mount and a tube clamp from A&A Mfg and we have a preliminary upper mount. This would allow me to get some dimensions needed for front shocks.

 

3. Once they were tack welded and bolted-on, next came the measurements. First was to set the chassis at static ride height and I started at 5-1/2”. Next was setting the front hub at ride height. I’m going to use a 25” tall front tire, so the center of the hub set to 12-1/2”. At this point, the measurement from the center of the lower mount to the center of the top could be around 19-1/2”. I’ve used QA-1 coilovers before, so when browsing through their catalog, there it was, the DD701. Its a double adjustable shock that meets my specifications perfectly. I ordered 2 and a pair of 500# springs as a starting point. They took a few days to get here, but it was worth the wait.

 

4. At this point and before any interference, there is 3-1/2” of compression and 2-1/2” of droop. At static ride height I’m at 16”. This couldn’t have worked out any better, but there was a bit more work to get them to fit. There was an interference issue between the spring and the frame. Not a big deal and nothing that some cutting, heating, hammering , welding and grinding couldn’t fix.

 

Hopefully I will get some time this coming week to finish both sides of the front suspension and get the exhaust done. 

Ovid_and_Flem
Ovid_and_Flem SuperDork
8/19/18 1:35 p.m.

In reply to lotusseven7 :

Very nice work!

lotusseven7
lotusseven7 Reader
9/17/18 8:42 p.m.

Not much free time the last few weeks, but enough to get front and rear suspension straightened out. Front upper and lower coil-over mounts made, frame cut and welded for spring clearance, rear upper coil-over mounts made and lowering bolts installed. In measuring the rear suspension travel and ride height, the rear shocks just so happen to be the same DD401’s that are on the Lotus 7 that we are also building. Luckily there were 4 brand new ones sitting on a shelf for another build. Well, there’s 2 on the shelf now.

 

I was also able to pick up an Edelbrock Victor Jr intake manifold from CraigsList. I wanted an “air gap” manifold since it will allow for higher revs than most others. That and they look cool too!

 

Im hoping to get a few hours this week to get the exhaust finished up. I’m thinking a single 4” from the collector back. I would like to make an exhaust that will handle 500+hp down the road. I’ll keep you posted as to the final decision. 

 

Better pictures to follow........

 

 

 

 

lotusseven7
lotusseven7 Reader
9/17/18 9:20 p.m.

Oh, I almost forgot, I did some shopping on CL and was able to pick up a set and a half of wheels for the kart. It might not seem like a big deal at this point, but I decided on a ride height and shock lengths based on a certain size tire, so I needed to get wheels and tires to get it on the ground. Most corvette drivers opt for wider wheels/tires in back and I’m guessing it’s mostly for aesthetics. Since there are LOTS of choices for Vette wheels out there, after a bit of research, I decided on the C5 “wagon wheels”. They are supposed to be lighter weight yet very strong(according to the interwebs). I picked up a pair of fronts with tires and TPMS sensors for $125! I also found a complete bare set for $200. My intention is to run the front 17x8.5” wheels on all 4 corners. This will allow me to run the same size tire all around, only carry one size spare wheel/tire that can go on any corner, run the 13” Z51 brakes and hopefully be able to tune the suspension easier. I also like to be able to “steer” the car with both the front and rear tires and having the smaller 275/40/17 tires on the back, it should rotate easier in the corners. No need for 315’s on back, they’ll just slow you down.

 

They might not be the most attractive wheels, but for less than $250 for a set, I can live with them unless a smoking deal comes along.

 

 

 

Ovid_and_Flem
Ovid_and_Flem SuperDork
9/18/18 8:25 a.m.

In reply to lotusseven7 :

We used 17 in wagon wheels on our 2016 challenge car. Although it wasn't a kart then as it's becoming now the 275 40 17s on all corners were plenty of tire. Car handled amazingly neutral especially when we got rid of oversteer by disconnecting rear sway bar. Truth be known I think the wagon wheels get a bad rap on looks. They're not that bad especially on an old C4.A.d slow start of our hack

BTW....if if you haven't already check out Facebook page titled Vette hack. Lots of projects to peruse their not that you'll need any ideas. Your project is coming along great

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