Astra SC Dyno : more is possible ?

Marty64

Regular Member
#1
Hi Guys !

The new owner of my Astra SC has passed a dyno and result is this map:

Marty-Astra G Supercharged-Courbe Puissance.jpg

We hope for more than 216hp !?

What do you think about this result, my ex-astra setup was:

Eaton M62 with 3.1" pulley
LSJ green injectors (410cc)
LSJ T/B (68mm)
CS Phenolic spacer
Dual pass mod
OBDT software
TMAP Sensor 2.5 bar
OEM fuel pump with OEM fuel pressure (3.8 bar)
2.5" DBILAS 4-1 manifold
2.5" DBILAS downpipe w/ 200 cells cat
2.5" DBILAS exhaust

IAT2 were between 36° to 50°C after 5 pulls with 16°C ambient temp.

I seen same setup reaching 250hp and more, WTF ?
What to do to reach the goal of 250 ? ignition advance setup, 2.8" pulley ... ?
 
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milo

Senior Member
#2
When evocarlos done my install I made the following on dyno




At the time it had standard exhaust, dual pass mod, 3.0 pulley and vxr injectors. So I would expect your old astra to hit at least 230bhp with the exhaust upgrades its got. Just a testament to the evocarlos install and considering he done it in 2 days and it was on the dyno the day after he done it.

Since then I've added a full 2.5" exhaust system from the manifold back with a 200 cell sport cat so I could be pushing slightly more bhp now.

Could it be it needs mapping to gain more performance??
 

evocarlos

Stupid Bollocks
Staff
#8
Those figures are in hp evocarlos by the looks of it (216.5hp, 228.8hp, 200.9hp) unless your referring to the very last figure which was 261N.
yes but i could not see if it were bhp or whp it could be either if it were 216whp then it would be about right if it were 216bhp then there's som tin wong
209whp i get to around 233bhp in the guesstimation chart

simons right without putting it on a dynojet set up the same with a 10% load then your never going to beable to compare to a car that has been
here my original z22se with a 3.1
img060 (Medium).jpg
my specs for the above graph..
low milage Eaton M62 with 3.1" pulley (17miles when fitted)
z20let injectors
LSJ T/B (68mm)
CS Phenolic spacer
Dual pass mod
klassen/CS software
MAP Sensor 2bar
OEM fuel pump with OEM fuel pressure (3.0 bar)(4.4bar under boost)
standard manifold
2.5" custom downpipe (no cat)
2 1/4" exhaust
 
#9
mine had a similar set up to carls when first mapped only I had a lightly ported head, dbilas manifold, 200cpi cat and 2.5" manifold back system.
they let of the throttle at 283bhp but she was still climbing! standard internals at the time so they restricted it back to 260bhp until I built a new bottom end.
first power run supercharged.jpg
first power run supercharged.jpg


I would think either your mapping is poor or the engine is in poor health?
 

evocarlos

Stupid Bollocks
Staff
#10
mine had a similar set up to carls when first mapped only I had a lightly ported head, dbilas manifold, 200cpi cat and 2.5" manifold back system.
they let of the throttle at 283bhp but she was still climbing! standard internals at the time so they restricted it back to 260bhp until I built a new bottom end.
View attachment 62592 View attachment 62592

I would think either your mapping is poor or the engine is in poor health?
it could just be the dyno that was used is s**t :)
 

Marty64

Regular Member
#11
Yes i think RR was S**t. An ASTRA 2.0 T stage 1 pasted the same RR same day and it indicate 193hp, this is the standard for an 2.0 T. Surely a bad software. Missing 20hp or more.
 
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#12
z20let astra g is 198bhp? and one with a good map exhaust and air filter mods would see over 250bhp.
sounds like the rollers are bad. go to a known good company to be safe and see how your car is running.
 
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