Bob Rawle

Nathan the APS CAK will be ok, will need to recheck the maf scaling although the feed pipe is smaller diameter in this version which should keep it within limits. Will soon see. Still suggest sticking with your std injectors for the moment.

Carlos I use the Bosch wideband in the Motec and yes they are similar afaik. It was worth sorting it out I think.

bob

carlos_hiraoka

Bob, it definetly is worth sorting it out, now the DD logs will tell u the real AFR ..... have u replaced the turbo inlet pipe to one of the AVO or STi units ?




Carlos H.

Nathan L

Phew

cheers Bob.

My credit card is already half melted

Nathan..

Bob Rawle

The inlet pipe is not part of "Phase 2" which is getting the best from just exhaust and panel filter change, I have "cheated" abit with the actuator but it is a relatively small expense and makes a real difference, the turbo is not up to the intake change imho. The VF36 install and cross check is the last part of this phase.

Phase 3, bigger turbo, injectors, fuel pump, fuel pressure reg, inlet pipe and induction kit. Will mean rescaling the maf, but I will need to increase the barrel size in any case so planned for. Target 400+ from std engine and top mount. But need to see where we are with the car as is before that.

EMS

Will you stick to a Twin-Scroll turbo for the Phase 3? Any possibilities in mind?

Mark.

Nathan L

Bobbbbbbbbb

I was happy with phase 2 until you mentioned that

More saving

Nathan..

Bob Rawle

Plan of campaign for the weekend of the 29th, I will get the production version of the exhaust on the car, also should manage a run on PE's rollers the same day (27th), so on the 29th will have a virtually direct comparison. I need the PE graph to measure gains as that is my baraometer (and Deltadash of course).

Car is running well, my closed loop tweaks are working and I am getting better at anticipating it behaving like a two wheel drive Cossie !!!

John F, I am experimenting with the diff settings and tyre pressures to see if I can get a good balance, maybe a quick trip round the block on the 29th for advice ? be much appreciated.

cheers

bob

drb5

iTrader: (4)

bob


if only i knew what all you guy's were talking about, i'd have asked if i could pop along and watch, as i'll be down on the 27th waiting for the next day with baited breath lol

carlos_hiraoka

Bob, how much power do you expect to make out of your current setup ?

Carlos H.

Bob Rawle

Power ... all I will say is more that the graph at the start of the thread .. the car is significantly quicker and I quoted the Deltadash gains above.

Mark, re turbo, yes some thoughts have crystalised but need to do a bit more research, its clear the twin scroll back end is somewhat restrictive for 400 bhp for example. I know what compressor housing/wheel combo I need though.

ScoobyTal

Bob

Is the APS CAK kit worth getting ?

Tal

Bob Rawle

There are better options in my view, it was on Nathans car when he bought it but its not something I would suggest. In order to reduce the effect on the maf the air pipe diameter is no bigger than the std air intake system, so not alot to gain. The temperature consideration only applies in traffic stop starting, as soon as the fans kick on any induction system heats up and a cast pipe holds heat far longer. An induction kit fitted inboard allows charge temps to run 3 degrees above ambient, in the inner wing its probably 2 degrees above ambient, no real gain. the supplied filter is a bit small as well if you are going for bigger power. If having to change maf scaling may as well do a proper job on it and make some significant airflow gains.

imho

cheers

bob

STi M'8

Bob, you have private msg

Bob Rawle

STi M'8. just read your message, will reply tomorrow as just off to a wedding.
bob

Nathan L

Tal having spoken to Bob about this I'm probably going to take my standard airbox with me when she gets the magic wand waved over her just in case.

I'll let you know how it goes.

Nathan..

ScoobyTal

Bob YHM

Nathan L

Bob

Are you recommending a Forge RCV on this car?

Or is the standard jobbie up to it?

Nathan..

Bob Rawle

I have installed a Forge recirc with a tweaked plunger/spring on mine and it helps the gearchange pickup, not essential but "recommended".

I've a busy day tomorrow, PE rolling road, Janspeed to get the prototype exhaust replaced with the production one ready for Prosport on Sunday.

Car feels good and Deltadash confirms it but proof in the pudding so we will see.

I have some web space available but haven't sussed the uploading etc so maybe I can prevail on you again, Nathan, for hosting the latest graph sometime tomorrow evening ?

cheers

bob

Nathan L

Yes of course no problems whatsoever. Just drop me a mail and I'll host it.

My last Forge DV was a VTA and when tweaked it had a blue spring + 3 packers. Held the boost nicely and not too loud.

What is the best set up on your car for the RCV? Is it a similar modification with packers etc?

Nathan..

carlos_hiraoka

and the results were ?????

Carlos H.

Bob Rawle

Sorry, been busy, 347 bhp and 348 ft lbs torque, haven't had time to sort out the graphs etc so bear with me, had some trouble with slipping we think as we saw just over 360 of each to start with. Its gained absolutely shed loads in the low rpm areas, I am in two minds about wetrher the twin scroll is limiting the peak power (power curve became almost flat) or wether the factory air box etc is the problem ... anyway I will try an induction kit on it next and that willl give me some clues.

So its pretty much as predicted, I considered the turbo to be good for about 350 ish, still only holding 1.2 bar at the high end which is why I am suspecting the air box as it holds it steadily from about 6600 to 8000 rpm.

bob

Bob Rawle

Just been going through todays datalogs (sad git I know) ... seems I was hitting 6.95 engine load(!!!) in the mid range this evening when I was testing the car to confirm the new exhaust is same as prototype ... Mark et al any views, seems to be boost related. Bu**er more work, means rescaling everything yet again. Maf voltage is in the low 4.6 somethings. Bear in mind this is a JDM Sti03 ie STi9 not the Eurospec one.

bob

ScoobyTal

Sorry to be a plonker

But what does the engine load refer to ??

obviously high is bad but why ?

Tal

(slipping on the rollers - He He ! )

carlos_hiraoka

347 bhp

and

348 lb-ft (48.11 kg.f-m)

Bob, this is a very nice result for a basically standard car.
If the power curve is flat then it is even more fun

Wonder how were the air inlet temps like .....

Carlos Hiraoka

Nathan L

360/360 prior to slipping probs!!!!

Bl00dy hell

Do you want to borrow my car with induction kit lol

Nathan..

jason4656

interested to see what happened at prosport bob??

Bob Rawle

Full write up on the way, at ProSport car made 350.9 bhp, we couldn't get a torque figure as the device for picking up engine rpm had a problem reading any of the cars with coil packs. Pleased with the result as it correlates well to my PE run last Friday.

more later

bob

Markus

Very impressive results indeed with minimal mods (unless I have missed something)

Bob Rawle

Just realised I can calculate torque as I have speed .. so will do. Carlos at PE my inlet temps at the start of the runs were 15/16 deg C (intake not charge) .. at Prosport there was a bit more soak and they were 18/19 deg C, not enough difference to be worried.

Mods are Exhaust ,, the new full Janspeed decatted 3", Sti panel filter, Forge bov, three port solenoid and adjustable actuator on turbo set up a bit. And then remapped factory ecu with the EcuTek software to suit.

Induction kit on the way to see if I can raise the ante on the top end, I suspect the airbox is throttling or the turbo is at its limit, however although it looks as though it tailing off it actually pulls v well past 7000 rpm as the curve is pretty flat.

Engine load is the measure that the ecu calculates from mass air flow, throttle etc to pick the point on the X axis of the maps. 6.95 is very high and is seen in the mid range just as boost peaked and held in 3rd/4th gear.

I have graphs of both rolling road runs and pics (exhaust) to go up but want to sort out the Prosport torque first.


bob

carlos_hiraoka

Bob, could u post (or u can send the to my email the graph and I can post it too) the dyno graphs of PE ..... would be nice at what rpms was the peak torque achieved.

Carlos H.