^ I didnt think about that, but youre completely right.

Uh yes I know that, I was talking about Stillen's dyno graphs not RCZ.

Yes, I just looked at stillen's. They used STD.

I called the shop to get my STD numbers 445hp/335tq.

That's great. Just wanted to make sure the correction factors are the same so it would be a fair comparison :D

So final figures are 445whp/335wtq @ 8psi and 93 octane.

Yup, and the run 9 minutes before that was 442hp/331tq....so its not like I picked an outlier.

Now those numbers sound correct, about right where they should be.

Looking GREAT!!....its amazing how much difference you can see dyno vs. dyno....thats why the mustang is the "heart breaker" but I LOVE tuning on her..nothing really compares with Load bearing.... :tiphat:

-Jack

Yeah, its crazy how big the difference is. Thanks for the Tune Jack.

Getting back to the engine bay temps...

I firmly believe that a vented hood would work wonders for our cars. Add a better radiator fan setup and thermostat, and you'll be golden. I was sitting in gridlock traffic for an hour last week in 90F weather and did a little research. Idling with the A/C on gave me oil temps of 215F. The A/C compressor activates the driver's side radiator fan...with the A/C off, only the passenger side fan is normally running. When I turned off the A/C (and the driver's side fan shut down), the engine temps climbed 15F to 230F.

Vented hood and better fans = win

I agree, but having a clean looking vented hood is another story...

good stuff RCZ, i hope to have this kit within the next 6 months.

Thanks Nitex

Spearfish, I've been thinking about a hood and painting all of it. I think I want to do some testing though. I'm gonna borrow a heat sensor to see how each change I make affects engine bay temps. I'm thinking the following:

- Jet hot coating intake charge pipe
- CryO2 Intercooler Sprayer for Heat exchanger / oil cooler
- Reflective gold foil on manifold / Water reservoir
- Heat shielding to isolate headers
- Oil cooler Fan
- Vented hood

I assume you are going to run the heat sensor before doing anything?
Something else that might be a good idea is to see how the air is flowing off the engine. Using the Mustang as an example the front of the hood is a large area of where the air dumps out, hence why the GT500 and such put the vent there.

I'm very interested to see how that turns out. While the shielding may be helpful for directing or containing radiant heat, my sense is that our engine bay is just too well sealed. While the fans do their best to funnel air in through the radiator, there are no decent exit locations...it's like a fan blowing in the top of a glass jar. Even a hood lift kit (which would look ridiculously stupid) would allow the air to exit at the base of the windshield and probably drop temps substantially. I'd be willing to bet that the shielding doesn't do much until you get the hot air vented out somehow.

how about removing some of the plastic shroud that connects the hood and the winshield? mine is completely removed, as is the wiper assembly, and I suspect it has improved the flow

Will try that, I need to get a sensor in there first though. Any foreseeable downsides to taking those sealing pieces out?

What do you guys think the max engine bay temp is?

Hah if i was in Texas still maybe i could get away with that, but its Julanuary here in Seattle so that wouldn't be such a good idea for me!

Do you guys think we exceed 158F (70C) inside the engine bay?

I wouldn't be surprised if we did.

Without a doubt. Sometimes my hood is too hot to touch, and I have no problem stirring my morning 155F homemade latte with a finger.

Here's my guess. Engine bay temp is within 20F of your oil temp at any given oil temperature. Also, assuming the engine bay temp would never be above oil temp.

Hell, I'll go test this with my wireless grill thermometer later tonight.

Im looking for a thermometer, that's why I ask. Let me know if your wireless grill one works...

ya the temps get pretty hot in therre. i am thinking it is time for a vented hood

I should have some numbers after my drive in the morning.

I know you guys are serious, and it will probably work, but I'm still laughing. :icon17:

Good Lord. That looks like a motorcycle dyno chart.
:worship:

Is that not one of the greatest inventions ever? Love mine.. I can cook while being inside and it's always dead on perfect when I pull it off..

No reason it wouldn't work fine near the engine, it's sensitive. Always pins ambient air temps too..

^^^ ya his HP numbers are great but interesting to see a lower TQ number then i got. Now could I take RCZ from a dig with only 6 PSI of boost. ahahahahahahahaha

I love mine too. It's amazing they don't cost more.

My grill thermometer may have just been retasked completely. Why buy a scan gauge to monitor intake temps? I'll just duct tape the probe and transmitter to the intake, then tape the receiver/display to my dash. LOL!


As for the dyno chart....that torque curve is as flat as my old girlfriend's...

Works great in the oven.. can't imagine a hot engine bay would be any different.

Ok spearfish.. get a cassarole together, throw it on the engine, hook your themometer up and get to driving already! two birds with one stone!

I'm driving up to our 'Supercar Saturday' car show in the AM. Definitely going to use the ol' thermometer to see the engine bay temps. Prepare to be dazzled people. Hell, I'll even make an HD video for you with my iPhone 4 :).

wondering how it went.

Uh yeah, postponed due to holiday weekend craziness. The honest answer is that I was so excited to get up to the supercar event that I forgot the thermometer. As I pulled into the parking lot, it dawned on me that I had completely forgotten. I even had it out on the kitchen counter. Yes, spearfish dropped the ball. I'll post up some info as soon as the holiday festivities settle down. Nothing planned Monday so I'll do a little test then.

haha, ok. I'm gonna pick one up soon too. There's no reason why it shouldnt work.

you really cant compare without getting on the same dyno....but if your car were much lighter than his and you had a really good launch it would be possible to beat him even with less power... ;):driving:

Engine bay temp update.

So there's nothing quick about trying to test these engine bay temps. I did a reading after a 2hr drive in 90F weather (parked the car in my garage). I placed the temp probe on top of the cam cover which seemed like a logical place for relative engine bay temps. With the A/C off and oil temps of ~215F, the probe read 171F. I switched the AC back on (and accessory radiator fan activated) and the temp slowly started to tick back down...however it was a slow process and I lost interest after about 5 minutes at 168F. I'll do it again when I have more time to see where it settles out.

Thanks Spear, I'm interested to see how mine are with the SC. Probably a good bit higher than your 170F. I was hoping to get real time driving temps since that's what really matters.

Still waiting for the Iron Chef 370Z Edition!

Since I'm a Chef, I'll just call up Nissan and have them get right on that asap, lol

Anyone have lightly used Stock sport pads they want to sell me? Or any vendors?

Raul I might still have mine in my garage. I'll look tonight when I get home.

Whatcha need them for?