SleepR1

Forgot to mention injector duty cycles were in the 70 to 78% range, peak duty cycle.

rceron

Manny, I didn't see anything about lap times (1:19s?). I want to know if the new hardware has made a difference. This of course depends on if you are still running the Hoosiers.

Post some pics of the event.

later.

CrispyRX7

iTrader: (139)

Manny,
Nice numbers. Exactly what I would expect from a well sorted track car. Coolant temps are only so-so though. Considering ambient air temp was in the 50's (degF), a coolant temp of 104deg C is something to watch when ambient temps rise into the 90's (degF).
BTW glad to see you have converted Kyle. Now if he will only come drive some east coast events. Are you listening Kyle? Must be nice to have only 380rwhp at 10psi!
Regards,
Crispy

SleepR1

Thanks, Chris. Speed Sauce Rx7 R1 got plenty of attention...almost as much as nocab72's silver rocket sled LOL Kyle caught on very nicely. He took it easy, to soak up all the knowledge Rob Drinnen was transferring. FWIW Kyle does plan to do Mid Ohio, which is practically in his backyard LOL Regarding the water temps, I agree the temps were ok considering it's an FMIC setup. FWIW, I don't do summer track events, so you won't see me out in a 95 F degree day running open track. I'd overheat way before Speed Sauce Rx7 R1 will

SleepR1

Ramon, I didn't have anyone time me. I was giving my student rides, plus others who were waiting for a ride. Probably should have had my passengers clicking off laptimes. I didn't think of that FWIW Rob Drinnen and I were running closely, and I think he was consistently doing 1:22, 1:23 with Hoosiers?

I sold my 245/45-17, 275/40-17 Hoosiers to Jaymz, so I was running my street setup, 255/40-17 Yokohama AVS Intermediates on 9 x 17, 45 mm ET SSR Integral A2s. Brake pads were Porterfield R4-Es all around. I'd say with the new mods, I was 2 to 3 seconds faster than before with street tires--even with 225-lb male passengers as weight penalties. The car felt strong...about as strong as yours, Ramon LOL

Pics and a full-length article will be on the Putnam Park website soon www.putnampark.com . I had a photojournalist/participant do a story on the event.

Best of luck at the Glen with the new Fikses (oh yeah )

CrispyRX7

iTrader: (139)

Manny,
Yeah I'm bummed about Mid Ohio, I had pen ready to write a check to register but couldn't bring myself to do it. Only one taker from my local clan wanted to join me for the 8 hour drive out to Mid Ohio. It'd be a long haul to go solo with no-one I know personally at the other end for support if I were to need it. Or at least know one I'd like to impose upon although I'm sure some rotary folsk would lend a hand if needed. Maybe some other time this or next year. Mid Ohio is on top of my list of tracks "to do" along with Road Atlanta. I guess it was for the best as I did pick up some tickets to see Fleetwood Mac that friday. I know I'm a geezer.
As for your new hooptie .... don't sweat [no pun intended] the summer hot temps just keep an eye on the coolant and AITs. I ran three days in 105degF ambient last year. Hot as hell but the car survived. Coolant temps hovered around 105-110degC whereupon I'd lift on the 4th lap or so of each session for a long straight to cool off a bit. Both for the driver and the car They were handing you bottles of water through your window as you came into the pits!
And a suggestion for getting lap times...GET A ROLL BAR! (if you don't have one already) As much time as you spend on the track it's probably about that time! With roll bar installed $90 for a camcorder mount and the worlds your oyster when it comes to testimony to your track "kills" and proof of your fast, or slow lap times. Plus camera footage is a great learning tool.
All FWIW.
As for Kyle...Mid Ohio in his backyard...lucky SOB! All I have is podunk Summit Point
Regards,
Crispy

Chronos

That's awesome about Kyle finally converting away from the 'dark side', hehe. Anyways, your results are pretty close to what I expected given the ambient temp and your hp. I'm curious to know what kyle's were at 380rwhp though, he uses a fmic as well if I'm not mistaken. If you're reading this nocab maybe you can share some of your data with us if you were logging.

SleepR1

Kyle's water temps were in the 88 C range, but he wasn't pushing the car hard at all. Without meaning to read like I'm all that, Kyle's pace was like my cool down pace. Once he gets more seat time, he'll see water temps closer to mine.

SleepR1

FWIW, I don't see a problem with running 104 C (219 F) peak water temp. Keep in mind that was PEAK. My temps were mostly in the 101 to 102 range (214 F to 216 F)? I'd say that's perfectly normal for running the motor hard for 25-minute sessions. As I recall the stock motor temps for stock IC/Rad setups were 220 to 240 F?

My point is that the consensus on this forum says FMIC is bad for track. Everyone said, I'm going to overheat with FMIC on track. From my experience thus far, the Rx7 Forum has proven wrong.

I expect Apr 26/27 Putnam Park to be a bit warmer yet, so I'll report back after that event.

The part that made me smile the most was air intake temps. 37 C (98.6 F). That means consistent horsepower production.

Ask radkins what his air intake temps were using an ASP Medium SMIC, and what his water temps were using the stock location Fluidyne rad? As I recall his water temps were the same as mine, but his air intake temps were higher by 8 to 10 degrees C?

See my sig for mods.

CrispyRX7

iTrader: (139)

Yup no problem running at 104C I'd keep hammering it until you hit 110C. That's my comfort level threshold for water temp.
As for the age old FMIC debate..only time will tell. 50degF ambient temp isn't... err... very telling IMO. As for radkins(?) Until water temps exceed the cooling capacity of the fans then everyones temps should be almost identical. The key is whos temps will exceed cooling capacity first.

Oh and checke dout your mods list...do yourself a favor get a roll bar and a proper set of
harnesses...eh?

My2Cents
Crispy
- still wants to drive MO

SleepR1

Chris,

My car is only a street car that goes on the track not a track that goes on the street

Some day I'll be able to dedicate Speed Sauce Racing Rx7 R1 to track, but I don't see that happening in the next few years.

230 F, 110 C...yeah that's still will within the stock operating range...

FWIW, I had Dave Barninger do the cooling mods on my Malloy Reman, so the water jacket passages have been enlarged.

As I mentioned before, I'm most active with track in the early spring and the early fall. I don't do many track events in the heat of the summer...just one...instructing for SVTOA @ IRP on July 26.

SleepR1

Chris,

I'll be instructing at the TracQuest Mid Ohio DE April 14/15. Go to www.tracquest.com for more information. Todd puts on outstanding events. He's more than PCA, BMW CCA, but man, you get a TON of track time @ Mid Ohio. Instructor/A Group runs with completely open passing (anywhere on track). Closest you'll get to comp driving without the dings in the fenders LOL

SPOautos

Also, something else to consider is that your saying your air temps are 37C which is 98.6F which is 40-45F over ambient

Which is WAY more than the 10F over ambient mentioned in the beginning of this post way back when it was started.

You air temps are about what I get out of my SMIC thats similar in size to a M2 med.

BTW Manny - Where do you get your Porterfields??? I'm fixing to change my stock brake pads and want to try a set of those R4-E's

STEPHEN

SleepR1

Stephen,

The air intake temps are read from the manifold, NOT the IC outlet pipe, which would be much cooler there. The manifold reading is subject to heat soak underhood.

FWIW, Ryan's ASP Med IC intake temps were 47 C (10 C higher than with my GReddy FMIC).

I get my Porterfield R4Es directly from Porterfield http://www.porterfield-brakes.com/

I use the R4-Es on the road during the motorsports season. They bite just fine cold, once you've bedded them in. They dust about as much as Hawk HP Plus, but do much better on track. These are better track pads than the '99 Type RS Sumitomo pads.

SPOautos

Thanks for the pad info man

STEPHEN

redrotorR1

How 'bout sending one of dem trees down to Texas, Sleep? My last heavily modding adventure has me still instinctively grabbing for my ankles .... Thank you sir, may I have another ....

As far as the coolant temp argument goes, the twins generate so much heat, I don't think it matters which IC upgrade you go with. The engine bay temps are going to be as high regardless. I auto-x with enuttage and his A'pexi RX6 turbo'd FD almost never climbs above 90C .... while I will see the 95's in the pits (that is, before the fans kick on). Very similar setups otherwise ...

SleepR1

Yeah, but the J-spec twins spool up FAST

Chronos

Well, no one's saying that the temps you were running are bad. (and comparing them to stock operating temps doesn't really prove much, we all know how inadequate the stock cooling is!) The fmic does seem to be addequate when using an upgraded radiator for your purposes...but my goal has always been to have a system that was %100 reliable in ANY situation, for extended periods of time, at moderately higher power levels (single turbo). The reason I've put so much time researching and comparing cooling system theory, design, and application is because I feel that the RX-7's prone to overheating and hot-running charecterics were the price the rotary paid for it's incredibly high power/size advantages over piston engines (quid pro quo). And I feel by eliminating them, or doing as much as possible to do so, the rotary could truly dominate. Reliability is our greatest flaw, so why not do EVERYTHING possible to resist it? As for me, I'll be running a V-mount system (which ALL of the japanese teams have adopted), In my opinion, it practically eliminates those inherent flaws.

Do a search on VMIC and read my posts if you're curious on all the aspects of HOW it does this, there's a bunch of factors.

*Btw SleepR1, if you ever do feel like the fmic system isn't sufficiant whether it's because you're running more power or running on a hot day or whatever, you could always set up an aquamist system for your radiator to cool things down. Happy tracking

SleepR1

All I know is that I was happy with the way my car performed last Saturday on track. My next events are with TracQuest @ Mid Ohio Apr 14/15 www.tracquest.com, and CIR PCA @ Putnam Park Apr 26/27 http://cir.pca.org/. Will report back on how the water temps go then. At last Saturday's event, when my car was parked, I had many onlookers checking out the engine bay. One Z06 owner was scratching his head trying to figure out what the secret speed sauce was under the hood LOL.

As for reliability. The five heavily modified Rx7s were actually quite reliable, while three nearly stock Rx7s had some problems. One stock Rx7 owner had boost related problems. His lower boost hose had split, and needed duct tape to temporarily fix the problem. The modded Rx7s belonged to radkins, nocab72, Rob Drinnen, Jim Phend, and me. We had no issues, except for our cars' thirst for high octane pump gas LOL

Apparently v-mount is the way to go for track cars that race in hot conditions, but my car is not strictly a track car, and (I don't "race" in a warm climate)--my car's a fast street car that can go on the track, and run with dedicated track cars.

Chronos

No, the VMIC isn't just for hot lapping days (no pun intended )...I allready know about your car and nocab72's, and the way he was driving. But what about radkins, Rob and Jim's cars? Do they run fmic's as well? How hard are they pushing their cars out there? Power levels? Mods?

the_glass_man

iTrader: (2)

Some good information.

Julian

iTrader: (14)

Any one elses experience with this. I have 26 rotary years of waterwetter use without failure.

91DropTop

Have you been in San Antonio lately?

SleepR1

Switched to Evans NPG+ with the 3rd motor. Increased the ignition retard temp from 110 to 130 C on the Power FC. Won't get to summer test. On my drive back from Rx7 Store, Evans coolant temps were between 86 and 87 C, no different from regular water-based-coolant temps. It'll be up to the new owner to summer-test the new motor and Evans NPG+ @ Road Atlanta. That's where I expect to see the Evans coolant temps rise to 120 C, and hopefully stabilize without any heat-related power loss. Cheers!

7racer

Manny are u selling your seven?