Romans 2005 Toyota Echo

[Roman]

Yeah been talking to someone who still runs the older cars.

They may very well be a bit flogged out compared to deals from the past. But thats fine because im still not 100% sure if they will fit okay yet. 

 

[Roman]

3 hours ago, Hyperblade said:

 

Just to be aware the tyres were designed for a 9" rim, but most guys run them on 8" rims, this means they bulge out to 220mm but tread is still 200mm they have a diameter of 540mm.  

Yeah the guy said hes got some that are 180 wide tread and some 200 wide but they are both the same real world dimensions. Im gonna be in a bit of trouble if theyre much wider than a regular 205 wide tyre. But! Just thinking about it, ive still got basically zero camber in the front. And the rear has room. Adding a few degrees would be win win for making them fit as well as cornering goodness.

If they do work out well I will be stoked.

[mjrstar]

The 200 in a slick generally translates to about 225 in a road tyre equivalent..

I priced and sized some Hoosier tarmac rally tyres a while ago, so yeah for sure you'd be best to get your hands on some to get a feel for how they might fit.

[Roman]

Ahh right. Pooz. 

Probably wont work then.

Cheap enough to give it a try though.

Either way im keeping the drag tyres on one pair until at least the oldschool drags.

That and getting to the dyno are main priorities after WOF. 

[rumrum]

Thought of you @Roman

[Roman]

Got a WOF today, super stoked about that! 

Also, for some reason the Dutch Top Gear website, and another Dutch site wrote some little articles about the Echo. 

This translation had me laughing out loud, ahaha

"The combination, which you only dream about (mainly because it just doesn't make sense), apparently runs track-time sessions in New Zealand , and sounds surprisingly good too. We hope not to offend anyone here, but the Toyota Prius engine isn't the prime candidate for an ' engine-swap ' project. We will also not soon see a Toyota Echo among the registrations of a track day. Still, David van der Haas from Matamate, New Zealand thought it sounded good in his head to bring the two together."

Thanks again to everyone that's helped me get the car going again with another motor. 
I'm now all set for OS drags in december, and getting the car back to the dyno in the meantime is now top priority.

[kws]

I love that this little car has captured the imagination of the worldwide media. In a world of chequebook car builds/supercars, this is what I'm here for.

[Roman]

I think if I had to summarize this project with a single picture, would be this:




But @keltik still gets the prize for best meme post in this thread, hahaha

[Roman]

Also I broke my ITB manifold trying to get it off, because I had to pooz it onto the head with heaps of silicone. 
Not for sake of sealing it from vacuum leaks. But because anywhere that wasnt covered in carbon fibre, needed to be sealed from fuel reaching it or it starts melting. hah.
So, I thought I'd give it another hoon printing one from carbon nylon stuff, as this is much more fuel/temp resistant.
Rather than fiddling with heaps of settings, just used PLA settings with hotter temps, and set extrusion rate to 80% 
I think most of my previous problems with it, were from extrusion rate being too high. 
As I think this filament is a little wider diameter than 1.75mm, it's harder to push into the tube than PLA etc.

Turned out pretty good, lots of stringing but its easier to tidy that up than fiddle endlessly with printer settings. So meh.
I need to print some trumpets for @Stu so this will hopefully work out well for that too 

[RUNAMUCK]

I just stopped by to ask, if you'll be on the dyno before drag day?

And also to say,

Damn those god damned torpedoes!

Dont you dare run a lower redline for a drag day. If you dont rev your engine to the moon, even for just that one day, I'll block you. Plus if you scatter the block, someone is sure to be filming. So we can all enjoy your offerings to the gods of speed. (Over and over)

[Roman]

Yes hopefully back to dyno before drags.

Rev limiter needs to stay at 9000 for drags, otherwise rpm drops too much on shifts. At trackday try stick to 8500ish.  I will set the limiter lower when doing burnouts. As it was overshooting to 9200rpm a lot which cant be helpful.

[Roman]

@RUNAMUCK its interesting looking at the drive power curves, where it crosses over tells you where is best to shift.
So in first gear, you lose so much wheel torque going to 2nd that it's worth revving the absolute snot out of it in 1st even though power is completely gone.
If it had a slightly taller first gear then it wouldnt "ideally" want to go to 10k




Then 2nd gear onwards, less need to rev it so high.







 

[R3spct]

Dyno day 19th Nov at Bombay, be cool to see how it goes compared to pushrod datsuns

 

[Roman]

Oh cool, where is that? At Gareth's place? 

[R3spct]

Yup, dont have a massive turnout atm, maybe 4 or 5 cars

Started out on NZ Datsun but not much interest atm, so all welcome

[Roman]

Having reprinted my manifold and looking at it with a fresh set of eyes. Although the maths says the taper in terms of cross sectional area change is nice and linear. 
I cant help but wonder if the taper angle is counter productive at high rpm. 

So I'm gonna try moving the throttles 35mm further from the head.
Then run a shorter trumpet to keep overal length the same.

Currently using the top cross section, will test out the bottom one.

[CorollaGT]

Couldn't find Prius engine with ITBs in here though

[Roman]

I finished printing the new manifold and trumpets with the revised taper length, all printed and fitting up nicely.



The motor now liked having the intake cam advanced for around another 1000rpm higher. Generally a good sign when this happens.

After I set the cam angle to new best positions, then fix the fuel table again.

It was only past 5000rpm that there was any meaningful difference in fuel values.


So there might be a little bit of power from the change, we'll see.

Also, picked up some of the Michelin slicks. 
I think it will work! They are less bulgey/wide than the drag tyres. 




The tyres are around 8.4kg per corner, so slightly heavier than 185/60/14 R888R but only a smidge. Offset by the wheel being lighter.

So in total it works out to about 3kg lighter, which isnt much but will have zillions more grip if I can make it work! 
Reckon it will be sweet.

Here's a list of everything that's been on the car so far.
Weight per corner.
Total weights listed in black at the top.

[Roman]

This should work sweet! 

The front is a bit so-so for guard clearance  but I'll get some camber bolts and see if that helps. 
Hoping to avoid having to roll the guards. 

But the fact that it's a smaller rolling diameter means the tyre might not ever touch the guard. 
Which probably means I should try lower it some more.

[xsspeed]

ah yes, now I see it