Tem120

iTrader: (5)

Had my first trackday this past weekend at sebring Short .. and as fun as it was .. my car was disappointingly not up to the task .


First session , My car was over 105C after 2 laps of LIGHT! throttle . and by 8 minutes into the sessions my brakes were done .

I tried various things flittering the pedal with left foot to give it some stiffness before braking . I managed to somewaht finish my other 3 sessions by extremely early braking and light braking . BUT by the end every session my brakes were done for anyways

hawk HPS NOT the track of choice for a track day I would NOT reccomend ANYONE use these LOL


Then we have heat , after the first session , I turned down the boost as low as it would go , so I was running oin 9 psi . BUT still COULD NOT get on the gas anytime I went into boost temps would just go up , if I stayed out of boost and gently accelerating it held which is what I had to end up dooing and lighting accelerating . BUT needless to say without brakes or a go pedal It was pretty underwhelming

I had to take the escape road twice after my brakes had had it and just werent doing anything anymore LOL

WITH all those issues it was STILL ALOT BETTER THEN AN AUTO X ever was . seat time was somuch more . I tried concentrating on getting the lines right even if I couldnt go for it in the straights .

alot to work on with my driving.

Tem120

iTrader: (5)

I forgot to add a bit of information , MY IAT were at 50-55 every session EVEN with my turbos turned down to 9 psi . and being easy on the gas.

WATER TEMPS! on the toher hand all but the first session i started with water temps at 80C and after a couple of minutes of part throttle . they were at 105 after that i tried staying out of boost and it kept from going any higher . BUT if I did go into boost up it went again without fail .

I am a bit of a wuss i'll admit as the other FD's saw water temps in the 110+ BUT they were pushing alot harder then I was .

Huge disappointment for the ONE benefit of a front mount . Another thing I never want to hear or see .. FMIC ! LOL

David Hayes

iTrader: (6)

Glad you had fun. I've enjoyed it the 1/2 dozen or so times I have been out. Had the same issues as you regarding temps, although mine climbed even higher. I think a v-mount setup will solve the problem and I will let you know how it works for me.

The other easy thing to check is your coolant mix. Are you running 50/50? If so, change that out to 70-80% distilled water, especially since you are in FL. Water is by far the best reducer of heat. Give that a shot if you haven't already.

Tem120

iTrader: (5)

I ran 1gallon of the half and half stuff , 1 bottle of water wetter , and the rest distilled water .

right now a V-mount is really out of the question Money unfortunately ( cant use ALL my money on my hobby ) =( .. I'm hoping a stock mount may let me be a bit more practical as all I need is a duct and I can fabricate everything else .

Mahjik

iTrader: (1)

Well, Hawk HPS pads have the word "Street" in them for a reason.

If you want to get creative, you can create better ducting with your FMIC in place. Check this thread:

https://www.rx7club.com/3rd-generati...6/#post5890220

Just keep in mind that your temps will increase even more with better brakes and stickier tires. Just don't focus on your coolant temps, also keep your oil temps in check.

Tem120

iTrader: (5)

yeah.. Ty , I went crazy teh weekend before ducted everything oilcoolers , and radiator /fmic and it did help a bit before that the new bumper had a much smaller opening then the mazdaspeed GTC I was using before and my temps imidiately shot up a few C higher then before .

So I went crazy and made all kinds of ducts using duct tape and some plexiglas for the larger areas . and it did help

But the degree of overheating at the track was just not good =/ I know our ambiant temps were in the 90's so it wasnt an easy day . But all the other FD's with smic seemed to be able to atleast drive their cars .. if I could fix the FMIC it'd be great , but I think its a flawed design with the rotary ..


BUT I guess I'll take a look at that it does seem kind of interesting.. getting the underscoop thing ... Maybe it will work .. I can definitely work something out

But at the end of the day. what would be ab etter solution? changing to a SMIC ? or making an underscoop .

Mahjik

iTrader: (1)

NA 20B... and I'm serious...


Something more practical: If you plan to track the car regularly (and after getting a taste of tracking, you likely will), do yourself a favor and start planning for a single turbo setup with a VMIC (and hopefully you are already dual oil coolers if not, factor that in as well). The single setup is not necessarily for more power, but for less heat. The stock twins are just two nuclear reactors underneath the hood and their subsequent AIT's are not great for the track. You'll take out two birds with one stone going with a decent single turbo setup.

David Hayes

iTrader: (6)

Vmic is the one of the best things for you. Peter Han tracks his car with his 99 twins, so you can check out what he's done. Never has temp issues, largely I think due to the v-mount setup:

https://www.rx7club.com/build-thread...build-1059495/

I'd pm him for advice as maybe he knows of something else to do.

Tem120

iTrader: (5)

I agreee with going single , and a Vmount dont get me wrong . But I rather kill these turbos before I replace them , Like stated above Ptrhahn does run the twins ,and I spoke with him regarding the twins . He runs a SMIC , But he agrees with the Vmount setup .

I just dont have the money for it right now , sofar this year I rebuilt the trans ,got the engine in the car just finished painting the car , and deleting the sunroof , aswell as fixing it from an accident so My piggybank is running on extra lean LOL . I could either stop racing and save up money . quickly OR try and use a cheaper solution even if its not ideal .

its not about power just like You said I just want something that will let me run the car .

for now .

Mahjik

iTrader: (1)

https://www.rx7club.com/3rd-generati.../#post11736027

Key piece there: Don't drive in July/August in VA heat on track

IMO, that's not solving heat issues.


Tem120, at the end of the day, you just have to decide *how* you want to drive on the track. You can definitely drive nice and easy on the track, keeping your temps and brakes in check. If you want to flog it around like Fritz in any kind of weather, you are going to need a different setup.

Over the past 14 years, I've been around the tracks with many other FD's and my past one. Those on the stock twins were much more likely to have issues than those with single setups. Going fast costs. Whether it's rebuilding motors or spending money on things to help not rebuild motors. I did it the wrong way, and spent my money rebuilding motors. I should have done it right from the beginning; but what you don't know, you don't know. I'm trying to help you "know". Do it right from the beginning and you'll be much happier in the end.

TomU

iTrader: (11)

As a point of reference, I've been flogging my completely stock FD (incl stock DP) for the past 4 yrs with no problem and was completely bliss in my ignorance. Time eventually caught up to me and I'm now in the process of swapping in a reman (I was reading over 260 oil temps when i blew the O-rings). In the process i plan to address the over heating issues that killed it. I plan to keep it stock-ish and go with a Ron Davis radiator, 99 bumper w/ large twin oil coolers, catless DP, and large SMIC. Don't expect to get back on the track this season, but will report back if this plan works vice going single/V-mount (which definately is the way to go).

TomU

iTrader: (11)

oh, and i upgraded my pads to DTC-60s front and 30s rear on stock calipers and absolutely love them (running stock rubber).

Tem120

iTrader: (5)

I agree with you 100% Vmount is the way to go. and I will probably do that very soon . BUT if I can find a used duct for $100 and keep racing unti lI save up enough for a Vmount and can probably resell the smic duct .

while still do some october / sept events i had planned .

Or its retire the car for another few months and save up for a Vmount . second choice is obviously the SMART choice... but.............. I hate the thought of having to retire the car again .. LOL

Mahjik

iTrader: (1)

And again, the v-mount will help with your coolant temps but your IAT's will still be higher than desired due to the twins. You have three main temp areas to control:

* Coolant
* Oil
* Intake Air

Make sure you have a plan to address all three.