Razor2001

Hi,

Can someone let me email my 4th gear dyno run and 4th gear DD logs so they can post them on here.

I would like a few of the pros to have a look at them and see if everything looks ok.

Car and history:

JDM STi-7, full ScoobySport Deact from turbo back, uprated fuel pump, standard ecu, boost surge controlled by an adjustable control valve (i.e. diff size restictor).

Gas is a 30% 109 RON + 70% 95 RON mixture that works out to about 99.2 RON.

KL stays pretty quiet and only get an odd single amber over 7,000 rpms in 4th gear etc

Road dyno shows about 235 hp, 222 Tq. What is that roughly in bhp and TQ ?

285 - 295 bhp, 270 - 280 tq ?

Cheers,
Ray

banny sti

iTrader: (68)

thought the jdm sti-7 was 310bhp as standard?? okay maybe slightly less with our fuel.

Razor2001

276 bhp standard on 100 RON fuel for the JDM STi-7. They say it produced no more and no less than the quoted 276 bhp figure....

banny sti

iTrader: (68)

the japanese manufacturers had a gentlemens agreement not to produce cars will an ouput greater than 280ps but the sti 7 was rated at 310bhp by most european people.

check this link

http://www.drmotorsport.co.uk/Our%20...%20STi%207.htm

Razor2001

Hi banny.

Yea I know about the Gentleman's agreement but from what many of the tuners say on here that this time the JDM STi-7 actually produced the number they said, no more no less.

I honestly don't believe that these things came 310 bhp standard.

Cheers,
Ray

banny sti

iTrader: (68)

if you think about it logically would the sti 7 have the same power as a 97 wrx?

Razor2001

hi banny

No clue man about how it compares to the 97 wrx. I don't want to start an argument and I wish my car came with 310 bhp standard; however, I have not seen evidence of this and many of the experts on here have had many diff dynos performed and got the standard 276 bhp figure.

I would love to hear some other thoughts on this.

Cheers,
Ray

banny sti

iTrader: (68)

what turbo do they come with as standard is it the vf30 or 34?

Razor2001

Not sure on the turbo, I think I asked this question before and never got a clear answer....something about some were made with one type of turbo some made with another ??

banny sti

iTrader: (68)

afaik the normal sti came with the vf30 and the spec c came with the vf34

Razor2001

Sounds right, thx

Razor2001

bttt, please look at original question I posted Thanks.

Razor2001

bttt

TonyFlow

email them to mdawes@_nospam_compass-systems.co.uk - Remove the _nospam_ part

Razor2001

Sent Tony,

Thank you very much

TonyFlow

all of them here http://www.compass-systems.co.uk/delta/razor/
Didn't want to make them all individually clicky, as I didnt want to rename any!

Razor2001

Andy F, Bob Rawle, J Banks and other mappers, look see please

EMS

Ray,

Your power was still raising at the point you stopped.... You better had it pulled until the rev limiter! I think it would have been a max. of about 230 HP @ wheels which should equal about 285 - 290 HP @ crank. This isn't bad looking at your 36 deg C inlet temperature!

Increadible how much advance those JDM ECU's are running..... In some points (mainly at higher revs) you see some bigger drops in knock correction which could cause jerkyness or flat spots in power delivery. A remap could cure that. Your boost curve looks spot on.

The Knock Link activity around 6400 RPM you mention is caused because the knock correction from the ECU is disabled slightly above 6000 RPM above that the ECU is "deaf" to knock. In the first log for example, you see a jump in timing from 31 deg @ 6200 RPM (where the knock correction is still working) to 35 deg @ 6500 RPM (where the knock correction isn't working) this could cause det! The only remedy is using higher octane fuel or remap the ECU.

Mark.

Razor2001

Hi Mark,

Thanks for that information. I would love a remmap but no one here does it (I thought about sending my ecu to be mapped by mail again but rather just wait until one lucky day a mapper comes to town ). I am just hoping the mixture that I am running 109 RON + 95 RON, roughly 99.2 RON (and yes I talked to the 109 RON race gas people and they said that it could be mixed and a 30% / 70% mixture was good for about 99.2 RON) is good enough to keep me det free. I rarely take her over 6,500 rpms anyway.

I guess I should be happy with 280 - 290 bhp with high inlet temps, 99.2 RON and only
a catless zorst from turbo back mod....not much better than the stock 276 bhp; however, that figure is quoted on 100 RON and lower inlet temps I am sure.

Thanks again Mark

Anyone else have any comments, suggestions, etc

Cheers,
Ray

Andy.F

I agree with Mark regarding a potential reason for knocklink activity at higher rpm, the knock listening range on your model is up to 6200rpm

The maximum knock correction I can see, referring to the original map, is -1.5 deg at 6200 (thats -1.5 from the maximum advance allowed at that rpm) which is a healthy sign and possibly just background noise, thats why the knock sensing is turned off there anyway as it cannot differentiate between mechanical noise and genuine knock.

The knock correction figures are not changing as much as they initially appear, the values in the correction map also change by 3-4 degrees in one step (400rpm)
The advance in the std map does not increase after 6krpm, it starts to drop actually in relation to engine load presumably as a result of the sensors deafness up there.

You are slightly down on target boost (1psi) but the wastegate is sitting at its max allowed duty at most points so this is probably due to you having the different restrictor fitted.
Also if you have the uprated pump then you will be running even richer that the already filthy rich std map ! Your rear O2 sensor is hitting 1.025v in places which is very rich. (but safe)

Andy

Razor2001

Thanks Andy

I guess as things stand right now things look pretty safe. Shame there is so much power out there waiting to be unleashed via a remmap.....oh well, one of these days.....

Andy what did you make of the dyno figures....235 wheel and 227 Tq ? Reasonable for 99.2 RON, high ambient temps and only a turbo back zorst ?

Appreciate all the info guys and any other pros out there please keep the input coming

Cheers,
Ray

Andy.F

What gear was that ? Tyre size and weight ?

Razor2001

4th gear, 1600 kilos, 225 17 45

Razor2001

bttt

EMS

Andy,

If you look in the correction map at the correct load columns, you will see the knock correction is down 2 deg from maximum value in most of the rev range. Only between 4400 and 4800 RPM and around 5600 RPM the engine seems "happy" with the max. allowed advance. On the first log the knock correction is even down 2.5 deg from max. after 6000 RPM, I don´t like that.

I don´t know whether the intercooler was heat soaked during those measurements, but normally I prefer only minor drop in knock correction. You get a much smoother running engine with less sudden drops in knock correction most of the time. When realy pushed in highest gear, or with lots of heat in the intercooler I allow some drop in knock correction. It´s just my style of mapping those cars.

Boost is perfect in line with the values programmed in the ECU, which is good looking at the high inlet temperature (after 20°C there is no positive dutycycle compensation) and only 4th gear.

P.S. As you say it should be quite rich though......

Mark.

Andy.F

Mar

I think you may be looking at a different set of maps from me ? AF481 7546

Andy

EMS

I was looking at the maps of the original AF481-7546 rom file. Did you look at the right load columns?

Mark.

Andy.F

Yes although I just interpolated to the nearest degree between columns for the values as they were on the CSV log. Did you look at the file in DD ?
I'll have another look later this evening at the particular areas you mention above.

Andy

EMS

I looked at the logs in DD and looked what the actually engine load was at every RPM point in the map.

Mark.

Razor2001

LOL.....this has gone waaaaaaay over my head