is that right 300bhp from 0.8 bar
 

Subaru : REDUCED SUBARU IMPREZA

as tiltle can you get 300bhp from 0.8 bar on a top mount


Adrian

Dunno y u would run 0.8 bar, and if he's getting 300 BHP then he's doin well. 1.0-1.2 bar would be more the norm

One of my mates has 305bhp from 0.9 bar on a classic wrx with a top mount intercooler,he also has around 320lb/ft torque aswell on Powerstations rollers !

not sure what the ecu is in the add never heard of a za ecu,more than likely its a z4 ecu or z5 ecu 256bhp and then all thats on it is an exhaust which just says decat pipe so it will be running around 260bhp/270bhp if healthy and defanutly not 300bhp.

It depends which turbo you use. I wouldn't expect to see 300bhp from 0.8bar on a TD05 16g :confused:

So how about my mates then ? He's got a standard TD05 16g running 0.9 bar,Z4 ecu with scoobyecu chip,uprated top mount,megan headers/up-pipe,magnex exhaust.

When it went to Powerstation they commented on how torquey his car was and how impressive it was at only 0.9 bar boost ;)

scoobyecu chip runs 1.1bar i thought.
although if one of the older ones i think they where 1.05bar
the chip i got off scott.t runs 1.1bar or a touch over.
if your mate has a z4 ecu he could sell it and get a few quid for it and change to a stadard ecu because the chip runs the same in either.

:confused: They did tell him he could run more boost easily with the chip but he said he'd rather leave it as it is !

i dont understand i thought the chip sets peak boost at the 1.1bar so if the chip is in there then it should be higher than 0.9bar, thats near enough standard boost of a z4 ecu 0.9bar.

I couldn't tell you mate.

I find the accuracy of these figures incredibly hard to believe. I have a stack load of mods, boosting up to 1.5 bar on a 16G and "only" get 325/302. Granted my map is slightly conservative, but not that much!

0.9 bar is near enough standard boost, so I dont see how it can get 305/320.

i wonder if he gets full power when he turns the aircon on :Whatever_ :)

It's funny how he got exactly 300bhp @ 0.8 bar. This means that its not proven by a rolling road print out which means basically he's made it up.
I'd put money on it that he thinks its 280 standard and hes got an exhaust so thats +20

Steve

i'm confident mine is around 300 bhp on 0.8bar

find out on the rollers soon enough ;)

I agree with the above, it basic physics that the standard turbo could not flow enough air at that pressure to create that power level.

Maybe he fitted a turbo off a lorry and forgot to mention it.

I completly disagree
i have 267 at the wheels, which is estimated at 320bhp. It's at 0.8 bar an on a standard td05.
The car is maxed out on standard injestors and a standard fuel pump so when there done gonna raise the boost and chuck more fuel through with the next map.

I've always been led to believe that more boost = more torque, so 320 torques :) doesn't seem possible to me at 0.9 bar.

0.8 bar and 320bhp on standard tdo5 16g :wonder:

My own car was originally on a standard td05 16g and that was 340bhp/320lb/ft at 1.4 bar.

If my mates car ran pretty much identical figures numerous times on different rolling road days and each time the r/r operator commented on how much torque the car produced,why is that so hard to believe ?

He had a boost gauge that was showing 1 bar but on more than one r/r it was actaully 0.9 bar !

The only way to settle this arguement is to establish: the turbo on the car so we can call up a compressor map, the ambient temp at the RR, we'll assume the car was at sea level for the sake of simplicity.

Once we've got the compressor map we can work out the efficiency and hence the temp of the air post compressor.

This will allow us to work out the density ratio of the charge and assuming that the NA version of the engine produces around 140 bhp will allow us to use the density ration to calculate approx power output at the pressure ratio calculated.

I don't have time, so someone else do it.:lol1:

I wish I had found one of those instead of the 94 import WRX I ended up buying.......

Don't know what it was boosting as standard.....

But I do know that with the Td05 fitted as standard mine boosts to peak at 1.4 - 1.5

And that when first bought, with induction kit and nur spec R it was putting out 260bhp on the rollers with Steve Simpson at the helm...

So a year later Simtec ecu and mods as long as your arm it now pushes out 312bhp 295torque. So unless someone has slipped a 2.5 with a bigger Td05. I wouldn't believe it possible to have as much power as stated at the top....

yeh 1.4bar 340bhp about right td0516g turbo near is full limit there and must of cost a bit to get it there and a good few mods.
so then comes along joe bloggs with his z4 ecu and decat running 0.8 bar peak and 320bhp,come on i dont think so, mine runs 1.2bar peak and mine is only 290bhp.:thumb:

Not on a 16g, no! :)

It can work the other way aswell though. On the same day at Powerstation that my mates wrx done 305bhp at 0.8 bar,an sti 5 with a massive spec had just been remapped and was only 295bhp at 1.2 bar !

One little part can make a massive difference in power.

My girlfriends wrx that she used to have was totally standard apart from an exhaust and that was 280bhp !

Rolling roads can be funny things, you will hear a great number of stories of cars that are extensively modified, are fast as fook on the road but show poor figures on the RR.

There are lots of factors to why this could be.

I totally agree with that,that's why I made the point of saying that my mates running 0.9 bar had made roughly identical figures on more than one rolling road.

its probably running lean as hell hence the uprated figures if its maxing out standard injectors and fuel pump then there is no extra fuel to compensate for all that air hence running lean wont be long till it goes pop at that rate best get the fuelling sorted asap

what year was girlfriends wrx and what mods to get 280bhp.
if your mate has got a scooby ecu chip and megan headers and decat exhaust etc hes not runnig 0.8 peak boost its more like 1.2bar peak.
no way at 0.8 on a tdo5 16g you going to get over 300bhp, maybe on a big turbo, sorry not buying it for 1 min, can you get hold of the rr graph.

Girlfriends wrx was a '95 with a full HKS exhaust(Hi-power I think it was called) fully de-catted.

My mates peaks at 1 bar and holds 0.9 bar.

I'm not trying to prove anything here,was trying to say that some cars give really good power with a few mods,others give not so impressive power with lots of expensive mods :thumb:

that sounds like a nice healthy result there,no surprises for your girlfriends wrx,1995 so a z4 ecu (256bhp) and full decat 270 odd upto 280bhp.
im not trying to prove anything but it is just the first impreza ive heard of running that boost and getting that result on a td05 16g, especially since the mods described would indicate hes running more boost just on the scoobyecu chip alone.