Ariel.Club Forum

All went smooth at Dyno, no more issues!! Final figures on the wheels @0.8 bar: 274kw/355.9nm. (we ran out of injector capacity to safely increase boost more, .... for now. 
Owner very excited and collecting the car tomorrow.

The owner wanted to retain the original type of spec he bought the car with. His aim is 300wkw (+-400whp). The Gt35 that was on the car is out of stock at our local Garrett dealer till end Jan 2016, and the 6262 was the next best available option. He didnt want to re engineer everything from scratch either.
The car is licensed and will mainly be used as a daily driver/toy, with the odd track day and drag event in between.
The car is not as laggy as one would think. Its on boost around 4000 rpm already, and pulling strong.
The Motec M400 will also be setup in the near future to take advantage of all its boost & traction control features aswell... its there, we can use it to our best advantage.

[quote="Jx H"]
Sorry to resurrect an old topic, but i think it is relevant.
Colin H's AA3 Turbo is still alive and well (again), now with a new owner in Johannesburg. ( i am not sure how many people owned this atom between Colin and now)

The new owner brought it to me, to look at a low power issue, and ''loud exhaust'' tone. Upon inspection, i found the turbo hanging from its flange by only one bolt! Obviously someone in the past had been fiddling without proper knowledge..... sigh.
After removing the turbo, i found the Garrett Gt35 to have excessive bearing noise, and impeller play aswell. This is a DBB turbo btw. Not good. The cause.... a partially blocked oil supply port to the turbo... Silicone sealer!! Local Garrett dealer had no stock, so i opted for a Precision 6262 SP with a .63 AR hot side. The wastegate was not seating properly anymore either, so a Precision 46mm V-band gate was installed aswell. Currently the car is at our dyno tuning shop, and is now experiencing a fuel pressure issue out the blue... this was determined to be a tired Walbro fuel pump. Replaced it with an AEM 335 alcohol friendly pump today. Fuel tank goes back in tomorrow, and dyno work continues. Up and till the pump packed up today, figures were around 260wkw @ 0.6 bar on the wheels.
[/quote]


what made you go for the Precision 6262 turbo. a maxed out smaller turbo would spool quicker and would make the car a lot less of a handful trying to put the power down out of the corners.

i have a small Precision turbo which i have maxed out at 453 bhp and 366 ft lbs  at 1.2 bar

at low boost 0.4 bar i make 300.


i originally had a log manifold, i then changed this to a sidewinder manifold and got a increase of 70bhp.

Good to know it's now in safe hands and being brought back to life  ..

Thanks for posting

1 bolt holding on to the turbo...

Sorry to resurrect an old topic, but i think it is relevant.
Colin H's AA3 Turbo is still alive and well (again), now with a new owner in Johannesburg. ( i am not sure how many people owned this atom between Colin and now)

The new owner brought it to me, to look at a low power issue, and ''loud exhaust'' tone. Upon inspection, i found the turbo hanging from its flange by only one bolt! Obviously someone in the past had been fiddling without proper knowledge..... sigh.
After removing the turbo, i found the Garrett Gt35 to have excessive bearing noise, and impeller play aswell. This is a DBB turbo btw. Not good. The cause.... a partially blocked oil supply port to the turbo... Silicone sealer!! Local Garrett dealer had no stock, so i opted for a Precision 6262 SP with a .63 AR hot side. The wastegate was not seating properly anymore either, so a Precision 46mm V-band gate was installed aswell. Currently the car is at our dyno tuning shop, and is now experiencing a fuel pressure issue out the blue... this was determined to be a tired Walbro fuel pump. Replaced it with an AEM 335 alcohol friendly pump today. Fuel tank goes back in tomorrow, and dyno work continues. Up and till the pump packed up today, figures were around 260wkw @ 0.6 bar on the wheels.

Expect we will be in the fireman's arms from 7:30 for a good while, probably best if you give Alistair a call when you are free.  But won't be too far from that area of town I guess.

he did, but i'm sitting on a boring shoot, hoping not to shoot to late.
what time and where?

[quote="Colin H"]
[quote="johnpest"]
Will be going to check the car in Cape town on friday

John
[/quote]

who's doing the work on you Atom?

i have the track booked on Friday btwn 12 and 2 if you're in the area and want to see my car.
Ben (UK Atom owner) will be there and Alistair is going to bring his Elise and is also going to try my 7......
[/quote]

We will also be brining the mighty Megane 200 sport with sticky handbrake.

Colin, did Alistair message you re: going for a beer this evening ? 

Ben

[quote="johnpest"]
Will be going to check the car in Cape town on friday

John
[/quote]

who's doing the work on you Atom?

i have the track booked on Friday btwn 12 and 2 if you're in the area and want to see my car.
Ben (UK Atom owner) will be there and Alistair is going to bring his Elise and is also going to try my 7......

[quote="johnpest"]
An oil cooler is next to the car - we enlarged the sump and added 4 l extra oil, but havent fitted the cooler

I am running the intercooler above the motor- have made a new cover over the bar

I wont be at the race as i am racing at Zwartkops last race of season in two championships (in Speads and lotus 7)

Will be going to check the car in Cape town on friday

John
[/quote]

For what reason did you enlarge the sump? On Colin H's Atom it already takes over 5 litres of oil. Why not just go dry sump?

An oil cooler is next to the car - we enlarged the sump and added 4 l extra oil, but havent fitted the cooler

I am running the intercooler above the motor- have made a new cover over the bar

I wont be at the race as i am racing at Zwartkops last race of season in two championships (in Speads and lotus 7)

Will be going to check the car in Cape town on friday

John

[quote="johnpest"]
my 2.4 l turbo Atom is finally nearing completion in cape Town to Race with You And Dawie
new smaller turbo (about 350 KW on the wheels@ 0.7)
Will post pics soon
Will have a new Toneau cover in place
trying various different intercooler positions but will finalise this week
I am a bit worried about the intercooler behind the turbo suffering from heat from close proximatey to the turbo
John
[/quote]

hey john, sounds great! will be good to have another atom racing with us!
are you going to make the race on the 7th November, it's the last race of the season.

we put a plate above the engine that directs air to the intercooler and keeps the engine heat off as well.
have you put an oil cooler, i'm still struggling with OT with the extra cooler and have to make a small cowl to direct air to it...

my car is all back together (clutch number 3 that should be good for 800 bhp), speed sensors installed for traction control, clutch sensor for blipping on down shift and extra button for additional boost when needed on the straights. now we just have to get all the programming of the Motec done.

[quote="benyeats"]
[quote="MotorCade.co.za"]
[quote="John H"]
[quote="MotorCade.co.za"]
[quote="1965Cobra427"]
[quote="MotorCade.co.za"]
[quote="dp35"]
[quote="Colin H"]
That's interesting - do you know if he suggest upgrading it or just replacing it with another standard one?
[/quote]

He recommended replacing it with a new stock OEM unit.
[/quote]

Meaning the stock item commonly fail?


I though I'll say Hi, usually just browse the forum, I'm responsible for all the work done on the Collin's Atom.
[/quote]

Welcome to the Forum MotorCade! I hope that some of the information her has proven useful to you in working with Colin's Atom. We are always eager to hear how 'the other guy' does it, and to see the different ways that our Atoms can be tweaked to reflect our individual machine lust. Hope to see you post more as your work progresses.
[/quote]

Yes, you will hear from me more often, I used to just browse the pics to see what you guys did with yours, back when I started working on the first Atom of Dawie Joubert, locally there really ain't much of them around, and most only know it from Top Gear.

Busy building another turbo Atom, started with the turbo manifold design this morning.
[/quote]
Ben Yeats and I are in CT next month if u are around. Would be nice to meet up. U are Joburg though no?
[/quote]

I'm in CT, just down the road from the track. I'll see if we can make a plan.
[/quote]

I am in CT now, the mrs is off diving with sharks, I am sat in the sun reading the forum.  We are meeting Colin H next week for some track time.

Ben

[/quote]

I better then get the car assembled as its currently stripped...

[quote="MotorCade.co.za"]
[quote="John H"]
[quote="MotorCade.co.za"]
[quote="1965Cobra427"]
[quote="MotorCade.co.za"]
[quote="dp35"]
[quote="Colin H"]
That's interesting - do you know if he suggest upgrading it or just replacing it with another standard one?
[/quote]

He recommended replacing it with a new stock OEM unit.
[/quote]

Meaning the stock item commonly fail?


I though I'll say Hi, usually just browse the forum, I'm responsible for all the work done on the Collin's Atom.
[/quote]

Welcome to the Forum MotorCade! I hope that some of the information her has proven useful to you in working with Colin's Atom. We are always eager to hear how 'the other guy' does it, and to see the different ways that our Atoms can be tweaked to reflect our individual machine lust. Hope to see you post more as your work progresses.
[/quote]

Yes, you will hear from me more often, I used to just browse the pics to see what you guys did with yours, back when I started working on the first Atom of Dawie Joubert, locally there really ain't much of them around, and most only know it from Top Gear.

Busy building another turbo Atom, started with the turbo manifold design this morning.
[/quote]
Ben Yeats and I are in CT next month if u are around. Would be nice to meet up. U are Joburg though no?
[/quote]

I'm in CT, just down the road from the track. I'll see if we can make a plan.
[/quote]

I am in CT now, the mrs is off diving with sharks, I am sat in the sun reading the forum.  We are meeting Colin H next week for some track time.

Ben