4GMR2 Build
What's the Eclipse missing? Traction, power at the rear, and weight balance.
So here's the build thread to focus on my 4G, mid engine, rear drive 2 seater build. 4GMR2. Sorry Toyota.
The car started life with Plain Jane around here, but after an unfortunate incident at the track which may or may not have been related to running 5W-20 while racing (don't do it), the engine decided it had enough of living. Plane Jane had life in the way, and so the car needed a new home. So I took over.
Credit where it's due, here's his build thread.
www.club4g.org
It was a sad day for Plane Jane, and a day with mixed feelings for me, taking over a friend's car. I still have a hard time referring to it as anything but his.
Here it was, leaving to a new life.
![102509]()
This is where I took over. The end of his build thread, minus a good engine. The cylinder walls are scored, the bearings are shot. It has no oil pressure.
Quickly, it found space with a friend nearby
![102510]()
And had fun watching the stripper take it all off
![102511]()
Then getting forked out in the parking lot
![102513]()
But here's where the car sits now.
![102512]()
Today was a productive day, with the seats coming out, gas tank, fuel straps, seats, some trim, center console, rear subframe, evap components, fuel filler neck, the wrappers of 3 Cliff bars, and some other stuff, such as the mouse poop from 3 Cliff bars which I may have been rolling around in (hint: yeah I was before I knew it was there)
So, next up, I've got to pick up some blades, and I'll be cutting out the rear end sheet metal. Everything between the frame rails is coming out.
So here's the build thread to focus on my 4G, mid engine, rear drive 2 seater build. 4GMR2. Sorry Toyota.
The car started life with Plain Jane around here, but after an unfortunate incident at the track which may or may not have been related to running 5W-20 while racing (don't do it), the engine decided it had enough of living. Plane Jane had life in the way, and so the car needed a new home. So I took over.
Credit where it's due, here's his build thread.
PJ's Eazy-E(clipse) GT
Thought it was about time to make one of these, so here goes. History: I bought this car on a whim. Heard it came to auction, read the specs and put in a bid. All said and done it set me back $6100 tax-in w/105k kilometers on the clock, which was a steal considering the amount of car I'd be...
www.club4g.org
It was a sad day for Plane Jane, and a day with mixed feelings for me, taking over a friend's car. I still have a hard time referring to it as anything but his.
Here it was, leaving to a new life.
This is where I took over. The end of his build thread, minus a good engine. The cylinder walls are scored, the bearings are shot. It has no oil pressure.
Quickly, it found space with a friend nearby
And had fun watching the stripper take it all off
Then getting forked out in the parking lot
But here's where the car sits now.
Today was a productive day, with the seats coming out, gas tank, fuel straps, seats, some trim, center console, rear subframe, evap components, fuel filler neck, the wrappers of 3 Cliff bars, and some other stuff, such as the mouse poop from 3 Cliff bars which I may have been rolling around in (hint: yeah I was before I knew it was there)
So, next up, I've got to pick up some blades, and I'll be cutting out the rear end sheet metal. Everything between the frame rails is coming out.
101 - 120 of 153 Posts
From a bunch of math then sim testing in Assetto Corsa, I settled on 4k front 6k rear spring rates. It's a bit softer than a 10k front 6k rear setup, which I feel is likely too stiff for my local track anyway. Time will tell. But even in digital with those new rates I dropped half a second off my best lap time, out of practice.
what I was looking at was the spring frequencies. They take in account the wheel rate (calculated from spring rate and geometry) and mass. I aimed for the flat ride principal, which is what you tend to find used by most manufacturers. 15-20% being the goal. I settled on a match giving 17.4%. In the future I could always change the springs anyway to fine tune, but staying mildly softer and paying attention to roll bar tuning seemed the nicer go for now.
Beyond that, I went with digressive valved shocks and custom strut body lengths to get my ride height. The digressive valving will act as a stiffer damper when I hit the brakes, gas, or enter a corner preventing dive/lift/roll, but allow for good tire contact with softer damping otherwise than a standard valve. That allows me to use a softer spring rate to give the benefits of a stiffer one without the downsides as well, on a non aero based car. Eventually if it sees high downforce, spring rate will be the only way to counter it.
![Brown Handwriting Rectangle Font Music]()
what I was looking at was the spring frequencies. They take in account the wheel rate (calculated from spring rate and geometry) and mass. I aimed for the flat ride principal, which is what you tend to find used by most manufacturers. 15-20% being the goal. I settled on a match giving 17.4%. In the future I could always change the springs anyway to fine tune, but staying mildly softer and paying attention to roll bar tuning seemed the nicer go for now.
Beyond that, I went with digressive valved shocks and custom strut body lengths to get my ride height. The digressive valving will act as a stiffer damper when I hit the brakes, gas, or enter a corner preventing dive/lift/roll, but allow for good tire contact with softer damping otherwise than a standard valve. That allows me to use a softer spring rate to give the benefits of a stiffer one without the downsides as well, on a non aero based car. Eventually if it sees high downforce, spring rate will be the only way to counter it.
Some updates, small ones.
I added camber bolts because my suspension won't be done until mid-late MAY now. May 8th is track day, so that's a no go.
I trimmed my rear bumper support to match the bumper. It doesn't serve any purpose but to hold my bumper now. That should help airflow (about 2.5" cut off)
![Vehicle registration plate Automotive tail & brake light Tire Vehicle Automotive lighting]()
I replaced my stock tails with some painted ones I started in 2019.
![Automotive parking light Automotive side marker light Vehicle Car Automotive lighting]()
And I added a light strip to my firewall. It's my only interior lighting, but lets me see my cargo bay (re-usable grocery bag behind the passenger seat) at night. Actually lights up the whole cabin
![Automotive lighting Gas Electric blue Event Midnight]()
I added camber bolts because my suspension won't be done until mid-late MAY now. May 8th is track day, so that's a no go.
I trimmed my rear bumper support to match the bumper. It doesn't serve any purpose but to hold my bumper now. That should help airflow (about 2.5" cut off)
I replaced my stock tails with some painted ones I started in 2019.
And I added a light strip to my firewall. It's my only interior lighting, but lets me see my cargo bay (re-usable grocery bag behind the passenger seat) at night. Actually lights up the whole cabin
Thank you.
The coilovers have arrived. They needed to be watered for a bit as they were small
But then they filled out
101 - 120 of 153 Posts
