T.c.c.a.v. Dyno day sunday 25/09/11 doctor drift tottenham

[Celica RA45]

if you are driving up to sydney ,most likely will be only sitting on 10 to 20 percent throttle any way ,so it wont effect it as much as wot
also when we tune 1 in the bung at merge and 1 in the back of exhaust to double check

[boxh34d]

Just saw the dyno graph in your build thread, and wow, that really is bloody lean.
Disregard my previous post!

[AE092]

boxh34d, I had pretty much the same AFR's as you but Sam said the car was running very well after it was on the dyno. I must admit, the car does feel fine except for the miss firing issues in the top end and the AFR's were sitting at a steady 11.5 the entire way (started at 14). I'm assuming I shouldn't worry too much? I've got the silver JZX100 Chaser

[boxh34d]

AE092:
My previous (and post) AFR's on 2 known sensors were 11.5:1 high in the rev range, but were 12.5 to 12.7:1 on Sam's dyno - which if correct would be a touch on the lean side. I doubt the accuracy due to subsequent tests.
If I understand you correctly, your AFR's were reading 11.5ish on sunday, and if the same trend was followed, I'd assume that they would actually be richer than that, which is typical factory turbo safe of around 10.5ish:1. I think you'd have to try pretty hard to get a factory toyota setup to ping due to running pig rich and having 3 fifths of bugger all timing, but do you want to post up your graph anyway??
The high end miss could be almost anything. If your engine is basically stock (I'm sure it was?), I doubt major things like mixtures or timing being a problem. Do you still have the platinum plugs in it? That is one of the first things to go from my experience. Great for camry's making no power to get long plug life, not so great for high comp or boosted cars in my experience. Maybe swap them for a set of gapped copper plugs and see if that helps?

[SilverRA23]

Readings taken from the o2 sensor at the collector suggest it wasn't any where near as lean as first thought.

Still lean, but not ohmygod the world is going to end lean.

Have put some bigger main jets in and gone slightly smaller in the main air corrector and its now much better and winds out all the way to 7grand which is kinda fun!

[andrew_mx83]

platinum plugs are poooo!

less spark for 10x the price?? no thanks, ill take my $3 NGK ones anyday.

[Celica RA45]

ok adam if your motor is a 18rg with 9.7 to 1 it should have 34 chokes 145 mains and 170 air correctors with 62.5 pumps
early 2tg with sleeve 125 main 150 air corrector without sleeve 135 and 150 and 32mm chokes and 30mm chokes
have also seen some 18rgr with 200 airs and 150 mains
late 2tg yamaha head 36mm chokes high comp motor

[SilverRA23]

Thanks Glenn - my motor has 92mm pistons and around 10.5:1 compression.

I am happy with the readings I have been getting on the sensor so will leave it as it is for the trip to Sydney.

Cheers

Adam

[Celica RA45]

were you happy with your dyno result and was this lower than normal as most 18rg there were very low i thought

[SilverRA23]

my car didnt get a power run on the dyno because the operator believed it was running very lean.

investigations since have shown that it was lean, but nothing like he thought.

so i don't have a power figure to be happy or disappointed with

[Celica RA45]

most of the other cars the red 1 only made about 40 kilowatt s around there and another 1 ra23 was about the same rate

[AE092]

AE092:
My previous (and post) AFR's on 2 known sensors were 11.5:1 high in the rev range, but were 12.5 to 12.7:1 on Sam's dyno - which if correct would be a touch on the lean side. I doubt the accuracy due to subsequent tests.
If I understand you correctly, your AFR's were reading 11.5ish on sunday, and if the same trend was followed, I'd assume that they would actually be richer than that, which is typical factory turbo safe of around 10.5ish:1. I think you'd have to try pretty hard to get a factory toyota setup to ping due to running pig rich and having 3 fifths of bugger all timing, but do you want to post up your graph anyway??
The high end miss could be almost anything. If your engine is basically stock (I'm sure it was?), I doubt major things like mixtures or timing being a problem. Do you still have the platinum plugs in it? That is one of the first things to go from my experience. Great for camry's making no power to get long plug life, not so great for high comp or boosted cars in my experience. Maybe swap them for a set of gapped copper plugs and see if that helps?

You're correct, car was sitting around 11.5:1 AFR from WOT (tapering from 14 to 12). And correct again, about the 1JZ being made to run rich from factory to protect the engine. I've read up alot about it over on the JZX100 forums and alot of discussion is based on the fact that Toyota's in general would run rich when at full throttle (close loop style ECU). As for the spark plugs, I recently changed them during my service and am running NGK BKR7E as recommended by the JZX guys for mildly modified 1J's. Still no change from the miss firing so I'll be looking at coil packs, leads and possibly O2 down the track.

Here's a shot of my dyno graph, excuse the poor iPhone quality


Car has FMIC, HKS Hi-Power Silent cat back, HKS drop-in panel filter and a bleed valve which was apparently set to 14psi (previous owner) but logged only 11psi on the dyno

[Celica RA45]

just wondering how this works, you made 155.1 kws and 395nm from you 2 jz turbo
and my 3sge made 154.7 kws and 364 nm of torque go figure .i would have thought your turbo and being a 3 litre 6 would have higher torque figures and also my hp as well

[Slim]

The JZX100 is 1JZ-GTE (2.5L) unless it's had an engine transplant.

As for the power figures... no idea. Perhaps your car is so awesome that normal logic does not apply to it.

[AE092]

Can't say for sure RA45 - my friends' white S1 Manual Chaser logged 750+ nM of torque but thats based on tractive effort and not wheel figures. The 1JZ-GTE is 2.5l as Slim said