Obioban's 2005 IR/IR Coupe

[Bry5on]

Excited

Slon tells me from memory that the cabrio style brace is good for 250-300Nm/degree not much but not nothing! Especially if it’s lighter.

[Obioban]

Excited

[Obioban]

Nice. Glad it has worked out so well.

Apologies if I missed this in the thread – why colder plugs?

It seems that the conventional rule is, "one heat range colder for every 75–100hp added"
e.g.: https://www.ngk.com/what-is-a-spark-plugs-heat-range-2

Last time my care was dynoed it was 351rwhp (dynojet SAE) which is ~70whp more than stock, which is ~83 crank hp, which is exactly in the middle of the range the range where it's suggested to go one step colder.

That said, there was no specific symptom I was hoping to address or gain I was expecting to realize. Just... attempting to optimize

[IamFODI]

Nice. Glad it has worked out so well.

Apologies if I missed this in the thread – why colder plugs?

[Obioban]

Review: HTE Tuning

I made some changes this winter that necessitated a new tune (higher flow injectors, colder plugs). I decided to take the opportunity to wipe years of continual tune changes and start from a fresh (CSL) stock tune.

Hassan (HTE) tuned my best friend’s car 2-3 years ago, and I was always impressed how much it felt like a stock car (only with more power). His car, far and away, felt the most “stock” feeling (in the good way) of any tuned car I’ve driven. So, I decided to go that route, as well.

My full hardware setup:
CSL Engine management, with MAP
OEM CSL Airbox, no flap
Higher flow injectors (Bosch 0280156063)
One step colder plugs (Denso ixu27)
Schrick 280/272 cams
SS V1 stepped headers (with a bosch wideband installed in an extra bung for data logging)
SS HJS catted section 1
SS Twin tube resonated Section 2
SS Street muffler

The injectors really threw everything for a loop compared to a “normal” tune, but Hassan was great. He had a general idea of where they would be from previous cars, but we played it safe—exactly what I want.

First, fired it up and monitored AFRs at idle. All good.
Next, fire it up and monitor AFRs while holding it at 2000 rpm. Also good.

Then, the part that I think really has set this tune apart from every previous tune I’ve had—road tuning! Every previous tune I’ve had has been WOT runs on the dyno. He spent way longer with me than I would have expected, working over and refining the tune as I drove around. Full throttle, all sorts of partial throttle, all RPM. The car feels freaking great—never stumbles, pulls from all RPM, blips readily/enthusiastically, etc. I still intend to try the drivability spreadsheet for fun (and because it’ll haunt me forever if I don’t), but I am dubious there’s room for improvement at this point.

I also have no doubt this tune is safe. Knock sensors are left at stock values, and we have a nice, safe 12.5 AFR from ~5500rpm to redline to keep it cool and knock free on track.

Haven’t had it in on a dyno, because I frankly don’t care so long as it drives correctly, but the car feels STRONG.

10/10, would buy again.

Because posts need pictures:

[oceansize]

Technically I think this is lighter than the original rubber sound deadening mat.

Nice, I was starting to think the end times were approaching... lol

[Obioban]

51488204055 (the original rubber mat): 2.83 kg
51488252759 (the replacement one): 1.67 kg


Sent from my iPhone using Tapatalk

there you go.

Was hard to be certain, as the original came out in... shards.

[Obioban]

I actually am very jealous. It's one of those things I keep forgetting to buy...

Just got back from a failed attempt at data logging with Testo (seemingly didn't record anything), and it is decidedly quieter with that installed.



Action shot, reading your post.

[karter16]

Technically I think this is lighter than the original rubber sound deadening mat.

51488204055 (the original rubber mat): 2.83 kg
51488252759 (the replacement one): 1.67 kg


Sent from my iPhone using Tapatalk

[heinzboehmer]

Try not to be too jealous.

I actually am very jealous. It's one of those things I keep forgetting to buy...

[Obioban]

Hol' up, you added weight to the car?

Technically I think this is lighter than the original rubber sound deadening mat.

[0-60motorsports]

Took advantage of my daughter moving from child seat to booster seat and did some hardcore modding today-- updated sound deadening pad under the back seat.



Try not to be too jealous.

I'll be installing mine soon too. Looks great.

[oceansize]

Took advantage of my daughter moving from child seat to booster seat and did some hardcore modding today-- updated sound deadening pad under the back seat.

Try not to be too jealous.

Hol' up, you added weight to the car?

[Obioban]

Took advantage of my daughter moving from child seat to booster seat and did some hardcore modding today-- updated sound deadening pad under the back seat.



Try not to be too jealous.

[0-60motorsports]

I wrapped my entire CSL intake in gold and I got laughed at.

Well well well lol.

You get laughed at regardless LOL