450hp "(NOT)enough power" project

[A80Avant]

what is your lamda on those high rpm?

[aronmatic2]

what is your lamda on those high rpm?

i allways keep the lambda under 0.8 on high boost and high rpm. i mean i allways keep it under 0.8
i run with standard pistons now. i have to save them.
i have lambda program. if i dont push the throttle more than 30%, its try to compensate to 0.97

[A80Avant]

very good.

i actually have to have around 0.75 from 6000rpm to 7500rpm if the boost is around 1.75 to 1.8bar

is this turbo a GT3076R or the 2876R?

[Bram]

6th gear will always do that,it does surge a bit.Mine does as well.

Ehm.... well my car does not surge in 5th or 6th gear doing WOT at lower RPM, so I am not sure if it is 'normal' what you describe on your setup. I never experience surge to be hounest with my car

[aronmatic2]

[QUOTE=Bram;413097]

6th gear will always do that,it does surge a bit.Mine does as well.

QUOTE]

Ehm.... well my car does not surge in 5th or 6th gear doing WOT at lower RPM, so I am not sure if it is 'normal' what you describe on your setup. I never experience surge to be hounest with my car

its can be normal, if your car maped near to surge line. we ussualy maping on 4th gear. if i doing WOT on 4th gear without surge, its will be surging,if you do the same in 6th. if you map the car 1,5-1.8bar with the same setup, no way to surge.

[Tom_]

aronmatic2 : the stock pistons and the rods of the S2 engine (3B,ABY) is forged as a 7A engine (2.3 20V) , isnt it? when i see u runnin H conrods and stock pistons.How much u have run up on these stock pistons?thx for answer...Tom

[Bram]

its can be normal, if your car maped near to surge line. we ussualy maping on 4th gear. if i doing WOT on 4th gear without surge, its will be surging,if you do the same in 6th. if you map the car 1,5-1.8bar with the same setup, no way to surge.

OK, that could make sense, as my GT3071R setup is mapped only for 1.7 bar on the lower RPM numbers. Good info Aron. tnx

[A80Avant]

aron,

is this with the SQ exhaust manifold?

[aronmatic2]

aron,

is this with the SQ exhaust manifold?

yes, it is. dont worry about it. i know you afraid about lag. forget it. install.
its will be good for 25years.

[aronmatic2]

aronmatic2 : the stock pistons and the rods of the S2 engine (3B,ABY) is forged as a 7A engine (2.3 20V) , isnt it? when i see u runnin H conrods and stock pistons.How much u have run up on these stock pistons?thx for answer...Tom

we will see, where is the end.
now its stil ok.

[A80Avant]

Good news Aron!
thanks

i will get it cryogeniced as well before fitment,as i did with the previous EM.

[prosty]

I know of a few Audis running 700-800 hp with stock pistons and E85
Pretty impressive

[Tom_]

prosty:
E85 is a type of fuel?isnt it,
and about the 7A pistons,i want build engine around 450hp with gt3071r,stock pistons and different conrods,also new Stand alone ecu and other things.What u think?

[Andreas]

E85 = ethanol

[prosty]

E85 is 85% Ethanol with 15% fuel mixture, wintertime it's 75% ethanol , its a bio fuel.

Tom: correctly tuned and built that should be no problem with stock pistons! (if you blow the stock pistons with 450hp you will blow the car with JE pistons or CP pistons too)