RomanDave's Prius C swap

[xnamerxx]

You might want to make some long tubes for the car, its a huge bump in mid range and top end.

[RomanDave]

Yeah that's the plan!

I've been waiting until I've got a hoist available first, but covid related fun times has delayed things a bit.

[RomanDave]

Had this car on the dyno, made 141hp at the hubs.

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Happy with that!

A friend loaned me some drag slicks to try.
So last night at the drags.

Suuuper busy, but it was really awesome to see a big crowd at the drags, lots of spectators too. Was a cool atmosphere.

So first run, set the hoosiers to around 20psi which is very high, but wanted to start out conservative.

Ran a 14.092 @ 100.21 mph with a 2.33 60ft.

Super happy with that!

I was convinced at this point that I'd get a 13 tonight.

Second run we dropped the pressures a bit, launch wasnt so good and I ran a 14.1 with a higher 60ft.

At this point I figured I'd probably cursed myself saying I'll get a 13.

Looking at the logs of both runs, the motor was bogging a bit when I was trying to roll into the throttle and clutch.

So third run, set a launch limiter at 5500rpm. Full throttle sitting on line, dump the clutch.

And crap. No wheel hop no big spinning, just felt like stretching out and releasing a rubber band.

It felt so much faster than my first run, I crossed the line realizing it must be a 13. Absolutely stoked beyond belief

Get my time slip and was blown away

13.83 @ 99.6 mph with a 2.1 60ft

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Here's the video for it

https://www.youtube.com/watch?v=Qd-YM6h4heA

[CrankyOldMan]

Amazing, congrats!

Best I ever got a time slip for was a 17 with the Blitz and my slightly-too-heavy AutoX tires. Oof.

[mitch9521]

I wonder if such a similar build is possible with the 2ZR-FXE pistons in a regular 2ZR-FE, this could open up an entirely new era of hotrodding Toyota engines, at least from a naturally aspirated route.

[ardianpradana]

I love this thread

you are amazing

[RomanDave]

A few slow updates on things.

I havent been able to get back to the drags yet, thanks to Covid related restrictions.

The 15" tyre setup was awesome, but for this car I wanted to get the 13" M&H setup.

But it's incredibly hard to find 13" 4x100 wheels, surprisingly enough!

So I've been looking and looking for wheels first before ordering tyres.

Then a set of the tyres I wanted, on some 13x7.5" Lenso rims, came up for sale for cheaper than just the cost of tyres. Done deal!

DSC08641.jpg

Looks a lot nicer I think, and the 205/60/13 means I'll still cross the line in third, but will cross the line a bit closer to 9000rpm.

Also, I've been looking for some alternatives to the 4AGE throttle bodies.
As 4AGE throttles are getting old, cruddy, and way more expensive.

I ended up sourcing an e-throttle setup from a BMW S1000RR bike.

Despite being only a 1 litre engine, these have a bore size 5mm larger than a 1nz. But narrower spacing between the bores, so it ends up nearly perfect.
It's also super nice and compact, and has 48mm throttles rather than 42mm at the narrowest point on the silvertops.

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So it's been fun making the 4AGE based setup, and I've learned heaps.
But it's earned its retirement so I'll hang these up on the wall in the shed as a reminder of fun times with them.

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I'm still waiting for the BMW throttles to arrive, so I've put the standard Aqua engine e-throttle manifold and airbox onto the motor.
I've used an SCP13 e-throttle pedal that bolted straight in.
Then just wired the e-throttle motor and new TPS to the ECU. easy.
Also added cruise control, because it's awesome to have!

Also, since this entire time I've been running a stock manifold and exhaust.
I'm finally planning to make a decent 4-1 long pipe manifold.
Ordering the parts in the next few weeks to get this underway.

DSC08647.jpg

Also, I fitted some Ohlin Coilovers, and the handling is very nice.

So there's still a little bit of drag racing performance left in it, even though this is 100% not the point of the car at all.
I still havent made it to any trackdays, but I expect that this car will excel there as well. It's incredibly rapid and handles amazingly.

[RomanDave]

Finished the BMW e-throttle setup. It's very nice.
Powerband pushed a bit higher with the shorter runners.

I bought a new 13" wheel setup which is a lot lighter.

Car is now 790kg give or take.

Using a 205/70/13 on the front.

Went back to the drags, ran a 13.49 @ 99.5mph

2.09 60ft time, so could still be quicker yet.

Still running a factory exhaust and manifold

DSC08671.jpg

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Here's an in car video of the fastest run:

https://www.youtube.com/watch?v=EsjwkvBHAqI

[mitch9521]

Brilliant. That 1NZ loves to sing

[RomanDave]

As anyone who's done trackdays etc knows, it can add an incredible amount of admin to try film things yourself.
Fixing camera angles, dealing with dead gopro batteries, full SD cards, suction cup mounts failling off, and so on.
It adds lot onto what can be quite a busy schedule already.
So I was incredibly stoked that there was enough interest for some guys to come spend a night filming my efforts at the drags.
Then going through all the motions of putting together a nice video from the footage.
If anyone's wanting an insight into the trials and tribulations of drag racing an echo, Have a geez.
It was a real fun night.

https://www.youtube.com/watch?v=uUlqZsjQanI

[Compeer]

Originally Posted by RomanDave

As anyone who's done trackdays etc knows, it can add an incredible amount of admin to try film things yourself.
Fixing camera angles, dealing with dead gopro batteries, full SD cards, suction cup mounts failling off, and so on.
It adds lot onto what can be quite a busy schedule already.
So I was incredibly stoked that there was enough interest for some guys to come spend a night filming my efforts at the drags.
Then going through all the motions of putting together a nice video from the footage.
If anyone's wanting an insight into the trials and tribulations of drag racing an echo, Have a geez.
It was a real fun night.

https://www.youtube.com/watch?v=uUlqZsjQanI

Are you still racing the car? I know its a year on but keen to get along to race days in 2023 and it would be awesome to hook up with some other people modding and racing these little cars.

Working towards a supercharger set up for mine, slowly picking my way through base mods like suspension and things and would love to pick your brain as I move forward to ecu and what not.

[theinteriorautomechanic]

Hi I just wanted to find out if the JUN cams are drop in cams for US Market 07-11 Yaris? I'm planning on doing BC Valve Springs as well as a bunch of other N/A mods. Are these drop in cams? Or will I need extensive tuning? Currently I am running an FTG Reflashed ECU with higher redline and adjusted A/F.

[saikouguy]

Originally Posted by theinteriorautomechanic

Hi I just wanted to find out if the JUN cams are drop in cams for US Market 07-11 Yaris? I'm planning on doing BC Valve Springs as well as a bunch of other N/A mods. Are these drop in cams? Or will I need extensive tuning? Currently I am running an FTG Reflashed ECU with higher redline and adjusted A/F.

Unfortunately Dave has moved on from this setup. You can read his build here: https://oldschool.co.nz/index.php?/t...5-toyota-echo/

Or alternatively join the Facebook groups and ask him there:
- https://www.facebook.com/groups/NCPClubAustralia
- https://www.facebook.com/groups/473202130211974

[remcafee]

when i had 9 inch lift jun cams thry ran a little weird at idle, triggering random misfires every once in a while, i solved that issue with 1 step colder plugs and it ran great on stock map