260F isnt too bad Cheston..keep going. Certainly an oil coil will help, however.

If you dont advnace your timing, the higher octane fuel will cause your EGT's to rise, and your oil/water temps to increase.

 

I agree..when I first read this I was thinking..260F isn't really that bad. Especially on the track. I would be worried about 260 degree oil temps while crusing down the street...but not at the track. Around 300 degrees I'd start to really worry on the track.

 

Wow..you sure have a lot of opinions about FI for a person who doesn't have an FI Z....

 

+1

I've been searching but can't find the answer - perhaps you can help. What is the thread size for the sandwich adapter? racerpartswholesale has a listing like '3/4" 16', '18mm', '20mm' etc. what is correct for the Z oil filter thread?

i just bought a nice cooler on ebay

http://cgi.ebay.com/ebaymotors/ws/eB...tem=8007349449

ahm

 

uhmmm....the higher your octane the lower your egt will be, assuming you have not made static timing changes to your ecu map

That being said, fromt the words of my engine builder (your mileage may vary but he is who I listen to and I've yet to lose a motor he has built or that I have tuned) oil temp should never approcach 1.1 times your water temp...the result is often detonation.

So, is 260F "bad"? It's not horrible, but it's not good and it's certainly not safe for the long term - an oil cooler will do a world of good. Just don't be temped to toss the biggest mama jama you can fit in there - something small, along the lines of the B&M shaped ones, would be a welcomed addition (though I'd recommend something different as those coolers are a bit on the cheesy side from a mounting standpoint)

 

Higher octane fuel burns slower, resulting incomplete combustion, and hotter end-gases. It's the same principle as ingnition timing retard. All things being equal, at higher RPM, your EGT's will be hotter with less ignition timing advance, assuming you are not on the verge of detonation, or detonating. We've demonstrated this during dyno testing numerous times. Headers start to glow like crazy with race fuels, until timing is sufficiently advanced. You really need to advance timing sufficiently, to get the most safe power out of race fuels.

 

every datalog I have ever done with pump vs race fuel, no matter what the car, shows lower egt's and marketdly lower AFR's. I can't comment on the dyno, as I prefer to street and track tune, when I do it...but now we are OT

though I know what you are saying Sharif can be true..suppose it all depends on many many factors - too many to take into consideration for every possible car.

Cheston - were you on race gas? Did you retune for the race gas?

 

The higher EGT's will only show themselves after the trq peak...generally speaking...if octane is too high, or timing is too low.

I think Cheston mentioned he was running a mix of 91/100 octane, so probably about 95 octane on his tank. I imagine this wasnt enough to contribute much to the high oil temp. But honestly, his oil temp isnt too terribly high for a track event, and his coolant temp was reasonable as well.

 

i was running 50% 91octane, 50% 100octane on my high boost setting 8.5psi. i didnt retune or anything for the track.. i did boost spike tho- and hit 8.8psi, but no remapping due to the race gas, i thought i'd just try and see what 100 octane felt like.

granted 265*F isnt *THAT* high, but that was my average oil temp on the track, and with my water temps staying stable and oil flucuating alot, i didnt feel that comfortable pushing the Z more. the highest peak oil temp i recorded that day was 284*F

the only thing that sucks with the oil cooler, is i'll have to make a T junction and retap my oiltemp gauge sensor.. right now i have the greddy universal oil accessory adapter where i put my sensor into... i guess with a sandwich adapter installed, i wont have anything to plug my sensor into unless i make my own T junction.

as for the B&M cores.. i can ask them what their suggestions are.. maybe a smaller core but use a fan?

 

The thread for our cars is 20mm-1.5. Here is the one that I have.

http://cgi.ebay.com/ebaymotors/Hayde...QQcmdZViewItem

 

you, my friend, get a gold star. shall we ever meet, smack me upside the head and say, 'buy me a beer!'

thank you much! i was gonna spend $80 to get the racerpartswholesale version. i like ~$40 (with shipping) better

ahm

 

Man Cheston, maybe you should get a better car...j/k. Thanks for letting me tear up your tires though. Lot's of fun on the skidpad.

 

Cheston, my oil temp sensor is located in a block that has the oil lines for the turbos coming out of it. I had the greddy adapter, per your advice, but 350evo didn't use it. I think they had a aluminum block with the right number of fittings. Ask BJ what he used, he may have one on hand.

 

Kevin: ha! any time with the tires... i cant wait for your BBK install... at least this time my life wont flash infront of my eyes as we run off the track due to brake fade..

Patrick:
hmm.. ill look into alternate sensor locations..

 

so? what's your beef with me? I have no issue with you or anything, but you're always trying to find some way to invalidate what I say. I have an opinion yeah and apparently my opinion always gets you all riled up. Just because I don't have FI on my Z doesn't automatically invalidate everything I say. If I said something bad about FI that has offended you in the past, I'm sorry dude, ok? let's move on.



so was my opinion "wrong" ?

is a vented hood a bad idea with FI if you track the car?
is an oil cooler a bad idea with FI if you track the car?
is 101 octane fuel a bad idea with FI if you track the car?
is a bigger radiator a bad idea with FI if you track the car?
is a power steering cooler a bad idea with FI if you track the car?

can any of those things possibly hurt? ......................I dunno, I guess enlighten me how they can other than the $ factor

I said that was IMO, meaning what I'd do if I was tracking a FI Z. That doesn't necesarily mean anything beyond that

 

about every single bad case of overheating I have seen at the track invoved aftermarket forced induction.

never seen a stock car overheat

 

You seem to have a lot of opinions about things that you don't have experience with. That's all. I guess someone could go as far as to say you could use every little accessory out there when you track your car...but there comes a point in which it just gets ridiculous.

None of those things are a "bad" idea. I wasn't saying that..but you made it sound like you "need" all those things if you're going to track an FI 350Z. I would take the car to the track with the proper montioring devices before deciding what to spend money on. If you go to the track and you never see a rise in coolant temp than a bigger radiator is a waste. Besides..a Nismo thermostat is cheaper and easier to install. For guys with the APS kit, we already have an oil pan with cooling fins and a 1 qt. greater capacity over stock..so an oil cooler in addition might be overkill. 101 octane isn't a bad idea I guess...but a tank of that stuff (you'll typically go through at least a tank of gas in a track day) costs A LOT of money..and for a car that's already conservatively tuned on 93 I really don't see the point. Plus as Sharif pointed out...you can see higher EGTs with race gas if you don't advance timing.

BTW - a stock Z already has a Power Steering cooler....

I'm just getting sick of you ragging on FI Zs.

 

there are a number of folks who've overheated their PS fluid. most of them running big R compounds, but they're out there. since i knew my APS install entailed dismounting/remounting the PS cooler, I took the opportunity to add the nismo part.

i'm also adding water and oil temp gauges (via Defi display) and EGT/boost/oil pressure in the factory gauge pod. it will be interesting to see the results...

ahm

 

What's your point? Do you see lots of FI Zs at track days overheating?? I've honestly never heard of anyone overheating a Z (besides the really big power guys) FI or not with a properly bled cooling system.

If you're talking about cars other than the Z with aftermarket FI...it's completely irrelevant.

 

I boiled my PS fliud when I was stock on S-03s at the track. No big deal really...just splattered some PS fluid on the inside of my hood. Never saw any noticeable decrease in performance in my power steering system.