Haven't posted in a while mainly cause I've been running like crazy. But lots of track time this year (11 days so far... Tires hate me). Was at the Glen earlier this week and had some fun on the short aka NASCAR layout. Extremely fast track

Enjoy!

 

Cool

 

Looking good! I really like the track layout, fast flowing and allows you to hit high exit speeds onto the straights. Looks like a blast!

I was hoping to make it out to Grattan on the 19th, but the baby will only be 4 weeks old, and the wife (Commander in Chief) thinks it's a bit too soon. So I'll try hitting Waterford Hills raceway in August, it's only an hour from my house. Then in September I'll do Grattan.

 

Yes, the short track at the Glen was very, very fast. My average speed on the quick laps was over 100 mph! Fastest layout I've driven to date. I need taller gears... not sure if it was apparent, but on the back straight coming out of the esses I hit redline in 5th and would just ride redline all the way down the straight. Alternatively, I tried grabbing 6th, but just bogged.

Lots of fun though

 

Its a great track. I raced there over a ten year period where our group sponsored a race each year racing enduro karts. Hitting 130 to 140mph in the straits was a real rush especially being only a couple inches off the ground.

 

Did you mount the camera differently this time?

 

I think your shorter slicks are hurting you a lot here. With the stock tires 6800 RPM in 5th gives you 148mph. You loose about 5-6mph due to shorter tire radius.

So in 6th it won't accelerate any more? Are you at least able to hold speed, or does the car slow down in 6th?

 

Nope, same mounting. If it seems like there is more vibration, well there was, but also the hood started fluttering really badly in my 2nd session. I cut out the "covers" on the underside of the hood under the hood vents, and that helped quite a bit, but at the worst I was seeing almost 1" displacement on the back side of the hood. It was quite terrifying at 140+

 

yeah I noticed a lot more vibration in this vid than all your other ones. And yeah that does sound pretty scary lol

 

6th slowly gains speed. And yes the shorter tires limit ground speed in years more. But the cost of them makes it worth while.

 

Yeah, good point about tire cost. With as many track days as you do it's a big deal.

So what do you think you'll end up doing? Swapping to a 3.55 rear end?

I LOVE my 3.73s on the street. So much so I can't get myself to let go in favour of better track day gearing. I'm starting to think I will have to get a tune to raise the redline to 7100~7200 RPM to help gain a few mph in each gear. Right now I'm pretty set on 285/35-19 as my track day tire size going forward.

Good to hear you can still gain speed in 6th

 

I will probably do 3.55's down the road. They would be perfect. I'm trying to hold out on getting a tune. I like that I can run to redline all day long with no real durability concerns. But we will see.

I'm not too impressed with the conti scrubs tho. They have been wearing extremely fast. Only have 6 good ones left now. Very sad.

Need a sponsor 😈

 

This is the kind of stuff I would love to do one day.. unfortunaltey I cant afford it should something go wrong.. so I'll just watch your videos for now.

 

I understand what you mean. Things rarely go wrong if you leave tc on and drive conservatively. The cars are highly capable and quite robust. I push mine more than most and it has held up better than expected. I'm always thinking "what if something goes wrong" though as well. But the reward over rules the risk for me at present so I keep going back out there. Hope you get to soon!!

 

That was a nice ride. Would 7500 RPM tune with extra HP make any difference?

 

Good question, the extra RPM would extend the usable range of 5th by ~12mph or so, which would be just about perfect actually.

But to be honest I'd have some serious durability concerns spinning a stock Coyote motor that high for sustained time periods. I think its fine for drag racing, or aggressive street driving where you only spend a few seconds at a time in that rev range, but at the road course over a 20-30 minute session you would probably spend a grand total of 2-3 minutes in that range.

At the very least I would personally only feel confident revving that high on a road course after installing Billet Oil pump gears and boss valve-train. Maybe a high RPM pulse ring too.

 

These engines are tougher than you think, as long as you keep nitrous and FI out of the picture. The 7500 RPM limit will be there, you want have to use it unless you need to. I'll bet the OP has hit his stock rev limiter a few times.

 

Yeah, he rides his in the video for about 10s at a time. I bounce off my 6800 rev limit more often than not as well.

I've read about oi pump failures on high revving Coyote Mustangs in a few places, both blow and NA motors.

Here is some good reading:
www.mustangandfords.com/how-to/engine/1504-addressing-the-coyotes-achilles-heel-with-a-billet-oil-pump-gears-install/

And more users reporting failures even with N/A stock motors.
http://forums.corral.net/forums/s-19...p-gears-2.html

And some engineering analysis here:
https://www.lmengines.com/mod-motor-oil-pump-failures/


I know the limit in the Roadrunner engines is 7500, but they have the valve train to handle better breathing at high RPM. I personally don't feel confident pushing a Coyote past 7100 or 7200 rpm. You're probably right that nothing may happen, but I feel like it's flirting with disaster. Than again, if I ever blow my motor I'm getting the Aluminator XS as a replacement!

 

Yes, another 700 RPM would be great. I can use the extra speed in 3-4-5 for the normal tracks I get to. But I'm not willing to give up my warranty for that... I've got 3 more years of powertrain that I plan on keeping intact! So maybe 3.55's...

Yeah, I touch the rev limiter a few times here and there

I have a friend who revs his Coyote to 7800 with the CJ intake and seems to have no issues. I can't speak to what else he's done to the car (do not believe there are any internal engine changes aside from perhaps the pulse ring). I'm not willing to risk that yet since I'm not racing. I just do these days for fun. Although I do like to be fastest

 

Does anyone know if the Road Runner has the same oil pump as TP cars, and other Coyotes?