Turbo or Atmo

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Turbo or Atmo

Postby clee » Thu Aug 24, 2006 4:56 pm

For sprinting/hillclimb an atmo would be best, no ? Lots of corners ,no real straights .Or even :shock: horror .................310 :lol:
SS74 how's it goin :?:
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Postby simontaylor » Thu Aug 24, 2006 5:00 pm

I'm begining to beleive the same myself.........Atmo is the way to go.
I too would be very interested to hear what "simon says"?
1986 : '86 GTA v6 BW-EFR turbo, with Adaptronic ECU
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Postby simontaylor » Thu Aug 24, 2006 5:26 pm

Often over a ton on the circuit sprints, so maybe a turbo is better suited to sprints instead of hill climbs.
I think Tim Jeffries had good success with his A610 turbo in previous years of the Tunbrige Wells sprint championship.
1986 : '86 GTA v6 BW-EFR turbo, with Adaptronic ECU
Firsts at
2007 : Gurston Down & RAOC Champion
2008 : Rushmoor & Eelmoor & ACSMC Hillclimb class Champion
2009 : Longcross & Eelmoor
2010 : Crystal Palace & Eelmoor
2016 : Rushmoor & 5th O/A
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Postby peterg » Thu Aug 24, 2006 7:16 pm

Ive never driven an atmo, but the turbo is pretty well suited, so much torque low down and not a lot of lag....its all about learning to drive the car youve got....turbo lag is no more of a problem for me than waiting for an engine to come on cam once you know what to do. Atmos are expensive to tune to get similar results, and similar torque and power levels mill move the whole lot up the rev range, defeating the objective of running an atmo!
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Postby clee » Thu Aug 24, 2006 7:31 pm

I knew you'd say that :lol: :lol: The lag must come in to it surely :?
I've driven both and am no expert :roll: but the atmo does feel a lot quicker .
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Postby David Gentleman » Thu Aug 24, 2006 7:37 pm

+1 for the atmo fan club.... 8)
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Postby peterg » Fri Aug 25, 2006 11:37 am

clee wrote:I knew you'd say that :lol: :lol: The lag must come in to it surely :?
I've driven both and am no expert :roll: but the atmo does feel a lot quicker .


Easier to drive yes, faster I would suggest not...the turbo has such a pile of torque and power once its spinning....keeping it spinning is where the problem lies. I have a nice throttle blip and ramming it into 1st technique for tight corners that means its rarely off boost! What will the car do in 1st flat out by the way...anyone???
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Matching revs.

Postby Miles » Fri Aug 25, 2006 11:57 am

Blipping the throttle aids gear change when going down,
Matching revs concept. But as to aid turbo lag not so sure you can rev the engine all you like the turbo will only spin when under load.(i.e in gear and forcing air in)
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Postby simonsays74 » Fri Aug 25, 2006 5:04 pm

the atmo has a very smooth power delivery. torque is curve is very flat and constant from very low revs and peaks at 5800 rpm but is still making power to 7000 rpm. (wont get near those revs with the turbo with standard rev limiter!)

after finishing 3rd in class in the N.I. hillclimb championship i think we will need an ATB diff and maybe re-build a gearbox to suit the hills better.

having driven both turbo and atmo on a track i would agree that the turbo is faster on the straights but not great when off boost in the bends.

one last thing, unless you had an anti-lag system i think the atmo is more controlable/adjustable with the throttle on slippy corners or when the car is sliding around.
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Postby peterg » Fri Aug 25, 2006 5:37 pm

Only 3rd??!!!! You need to try harder :lol: Actually....I will be coming 3rd if I dont get that b!*tard engine sorted :evil:
Well done......I am aware that the competition out there will be tough...the Irish seem to love their cars! One of these years I'll get over there and do Craig Antlet.
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Postby Alpineandy » Fri Aug 25, 2006 8:48 pm

peterg wrote:One of these years I'll get over there and do Craig Antlet.


Why? What's he done to you?



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Postby stephendell » Fri Aug 25, 2006 9:43 pm

The factory test drivers preferred the Atmo and were quicker round short circuits. The turbo gains when there are long straights. The factory test drivers agreed that the 24V atmo was the ideal version unfortunately they never made it!
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Postby andyh877 » Fri Aug 25, 2006 10:05 pm

stephendell wrote:The factory test drivers preferred the Atmo and were quicker round short circuits. The turbo gains when there are long straights. The factory test drivers agreed that the 24V atmo was the ideal version unfortunately they never made it!


until............ :idea: 8)
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Postby David Gentleman » Fri Aug 25, 2006 10:53 pm

andyh877 wrote:
stephendell wrote:The factory test drivers preferred the Atmo and were quicker round short circuits. The turbo gains when there are long straights. The factory test drivers agreed that the 24V atmo was the ideal version unfortunately they never made it!


until............ :idea: 8)


..VEC racing did it about 5 years ago. :)
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Postby EATMYPLASTICARSE » Sat Aug 26, 2006 2:35 pm

simontaylor wrote:I'm begining to beleive the same myself.........Atmo is the way to go.
I too would be very interested to hear what "simon says"?


I"ve never driven a Turbo so i"ve no idea what its like but i"m really pleased with the way my Atmo pulls from no revs at all and then it kicks in even harder from 4500 revs onwards, its got power at any revs. Just floor it and it goes instantly.
never really ever thought that i would own a gta, but am i happy that i do!!.
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