scooby-tc

iTrader: (2)

Maybe its just me but i had my Spec C remapped today by the legend that is JGM but to my dismay it didnt get anywhere near what i expected from a twinscroll car.Mods are full 3" RCM exhaust,Green panel filter with cold air feed,uprated turbo dynamics actuator and 3 port boost solenoid





is this figure normal? or am i just expecting too much.Just to add the car was idling for 15-20 mins before going on the rollers

LegacySTi

iTrader: (13)

assume on a vf36.

so your really only running stage1 mods,

actuator and 3port not needed at this stage.


I'd class this as a 335bhp area.. So spot on.


WAT DID YOU EXPECT??

scooby-tc

iTrader: (2)

I expected around the 350bhp mark and 360+ lbft but i have been known to be over expectant on dyno figures over the years .It does drive fantastic on the road which is the most important thing,i was just curious as to whether these sort of figures are normal

LegacySTi

iTrader: (13)

Road mapping is best way to go..

Don't mind all RR figures..

Its quarter miles figures tells the results.

scooby-tc

iTrader: (2)

I value my licence hence dyno mapping

LegacySTi

iTrader: (13)

very few short periods up above...

Jolly Green Monster

iTrader: (4)

The tmic was getting fairly hot..

Road dyno figures matched the Torque pretty much (4lb less on road dyno) but showed 364bhp..

Sorry you are disappointed Daren.

Simon

dunx

iTrader: (3)

Ignore the "pub printout" if it goes well enough...

dunx

dynamix

iTrader: (3)

Looks like heat played it parts in knocking the power out above 6000 rpm. If it wasnt getting enough cooling of the tmic or if the tmic couldnt cope it would cost it power up there.

Looks a decent result for dyno IMO but the road would tell a different story with proper airflow to the TMIC.

JDM_Stig

iTrader: (3)

Do you have any before printouts ?
As you have said its drive ability but it would have been interesting to see where you are reaching peak boost etc before, The figure may not be as high but where is the power now? If you hitting peak boost by 3400 and not 4400 rpm(example) then it will change the way the car feels/drives etc so a map isnt always about reaching a BIG bhp number(torque is more important anyway),
Saying that if there was anything wrong wrong im sure it would have shown up to your mapper,
Maybe you have reached a limit on what your exhaust can flow etc(if its on the standard exhaust),
And of course your fuel economy will have improved after the map.

RA Dunk

I think you should be happy considering the mods you have put on

scooby-tc

iTrader: (2)

Here are the printouts i got when the car was completely factory standard





I am happy with the way it drives,i just thought with full decat,filter,uprated actuator and 3 port these cars made a lot more power than that.Now i know its me being over optimistic i am happy

dynamix

iTrader: (3)

I dont think you were being overly optimistic, its just that dyno's produce some weird results sometimes that dont reflect the way the car is in the real world. In your case it looks like heat was knocking the power down at the top.

Pavlo

Looks spot on to me.

The "accepted wisdom" of always getting 350-360hp on a twinscroll JDM is bollox. Maybe if you get a good road dyno figure with inaccurate weight figure, and no temperature correction and an optimistic addition for transmission losses you can see these figures, but not on a rolling road.

I remapped a JDM twinsroll previously mapped by a well known mapper that was reported to be making 360hp, on the dyno it made 327hp with AFR figures that scared the crap out of me. Best I could get with sensible AFR was 329hp, with quite good cooling of the TMIC.

It may well make more power on the road, TMIC cars always report more airflow when run on the open road, but after a few pulls the TMIC will warm up.

bluenose172

iTrader: (2)

I've eaked a little bit more from my map since my last 1/4 mile, but with 'only' 343/350 bhp/lbft I did 12.5 @ 110 with a 1.8 60ft. Get on the strip and see what it can do, never mind the dyno figures!

P.S. Your actuator looks a lot better than the Forge one I have, I cannot hold that boost to the redline. I think the Forge one is no better than stock tbh, for anyone interested.

scooby-tc

iTrader: (2)

many thanks for the comments guys,i am feeling quite pleased with the results now and i'd just like to say that Simons work on the mapping front was 1st class as ever the only mapper id ever use

a16pse

Hi mate simon mapped my STI06 and it made 336 bhp i cant remember the torqus and i thought that was low but on the road its ACE, i let my mate who is quite a good driver take me out in my own car and i s..t myself you dont realise how quick these cars are when you rdive them all the time as you get used to it.

SPEN555

A few years ago I let my MY03 JDM STi car idle for a good while before going on the rollers. I had done some mods to the car and previously had got 349bhp, so I was expecting to comfortably beat this. On the road the car felt a lot quicker. I got something like 329bhp

Ami

iTrader: (5)

Do you use also stronger spring in your Forge actuator? What colour?

cheers

TingTongPJ

iTrader: (24)

as said above it's how the car drives on the road thats important.

it's still a very quick car !

at least if simon has mapped it for you you know 100% you have a good map and most important it's going to be safe enough for you to enjoy without risking your engine.

bluenose172

iTrader: (2)

Apparently it had the blue spring installed in it.

Shaun

scooby-tc,
Go to a RR set-up that has either a very good cell with decent airflow, or a cell that has a very good TMIC fan (like the dyno cell at PowerStation). At least then, that will erradicate the heat issue. To be honest though.... if you ran it back on the RR above, you would probably find the figures would improve a lot (assuming that inlet temps were the problem).

Pavlo

agreed!

Just dynoed a car that apparently picked up 25hp from a decent fan.

scooby-tc

iTrader: (2)

Cheers guys,well its going back on the same dyno tomorrow as we have a dyno day booked for a fair few of us only this time i wont be leaving the engine running while stationary for 20 mins .TBH im not overly fussed about numbers as i know the map is good i just expected a bit more.I certainly wont be chasing numbers though as i don't go to enough pubs

joz8968

iTrader: (13)

As said figures are just figures - 350 looks so much more aesthetically pleasing than 339 on paper, after all

Do you reckon you'd be able to feel/tell if your car was 339 or 350 when out on the road?!

And in any case, 339 is flaming 97%(!!!) of your 'expected' bhp anyways! Enjoy......

dunx

iTrader: (3)

I was 2% short of my "pub ammo target" with mine, so I had a curry every night for a week.....

That burns.

dunx

JohnD

iTrader: (5)

Now - If you managed to re-cycle the methane you produced into the induction system, you could have made up that 2%??

JohnD

joz8968

iTrader: (13)

lol at you two.

Mus

iTrader: (2)

The old school fiesta rs the fiat uno turbos with a proper turbo when they hit boost they felt super quick due to the way the power came in it was like nothing nothing nothing and then Bang. nower days mapping is diffrent to before everything comes in more smoother due to better quality mods and more accurate mapping. but you can still get that old school lag if you want just put a massive turbo on there lol

joz8968

iTrader: (13)

Yeah I remember my R5 GT Turbo as having that sort of delivery - was really thrilling! Such a snapshot of the late 80's/early 90's turbo era!

Got it boosted by means of the classic in-car adjustable bleed valve and bigger jet for the Solex pressurised carb. If the valve was opened to 180deg then that gave about 145bhp... if it was opened right out to 360deg then it gave off 6ft long flames on a massive misfire that sounded like a shotgun, and causing people to run for cover! Unsurprisingly, and unbeknownst at the time, a cylinder liner cracked and I went through 3 turbos because of it!

Blimey the archaicness! Hell, that damn car even had a manual choke!!!

Still have very fond memories of that car - it was shot through with genuine character and had a definite engaging 'personality'.

Sorry for rambling off topic folks.