The Birth of Brandi's Twins [COTW 8/8/11]

[mylftft]

RACECAR!

[SSE 4 2SS]

Originally Posted by mylftft

RACECAR!

[stevieturbo]

Originally Posted by mylftft

RACECAR!

Really depends.

The set you've pictured looks like a flush set to be mounted on the underside of the hood...which would probably be trickier.

But it's just a case of finding somewhere suitable to mount them and the pin, marking the holes and then cutting them.

Depends how fussy the person doing it is. But you definitely want to cut once ! lol So measure and mark carefully.

[SSE 4 2SS]

Originally Posted by stevieturbo

Really depends.

The set you've pictured looks like a flush set to be mounted on the underside of the hood...which would probably be trickier.

But it's just a case of finding somewhere suitable to mount them and the pin, marking the holes and then cutting them.

Depends how fussy the person doing it is. But you definitely want to cut once ! lol So measure and mark carefully.

The ones I ordered do not have the lock, and they are the top mount... That was a quick pic to copy...

I can be a bit picky on stuff so I will take my time...

[CamaroSkooter]

Originally Posted by stevieturbo

Strangely...and not necessarily a reflection on the product.

But my kevlar hood took flight a week ago at 120mph with those.

As a single skin and very un-aerodynamic car, my hood flexed and moved a lot over 150mph.

The problem on mine. Over 150mph this flex caused the pins to get pulled inwards and bend slightly. I then had to re-straighten. After multiple times fatigue in the metal sets in.

Last week one of the pins failed on the threaded section due to this fatigue, one side of the hood lifted and caught air, the other aerocatch ripped apart...and hood took flight ! lol


I've refitted my old steel hood, and I am still using aerocatches, but I've used steel pins this time as an extra precaution.
I trust the catch, I trust the design. But not 100% sure on the alloy pins.

But any loadings placed on the pins would depend on how rigid the hood is, whether they might get bent etc.

Originally Posted by SSE 4 2SS

Wow, sorry to hear that happened, to you, never a good show when it does... I appreciate the info... I'll talk to Corey and we may fab some steel pins to ensure that doesn't happen...

I'm sporting a factory hood, with hex vents cut in it, but it is metal... I figure these have got to be better than the factory latch... when all are used together...

I saw these first on a V-8 Supercars Camaro at the circuit of the Americas in Austin Texas...

I'll heed your words and keep an eye on them...

Cheers...

Originally Posted by stevieturbo

I'd say with a steel hood, then you'd be perfectly safe.

The issue was with the flex on the kevlar one I had. I had run the same hood/pins for several years, many times over 150, and also quite a mile few runs at 190+

So it's not like it was a sudden failure. Partly my own fault, as I knew at some point I should have changed the pins because of the fatigue aspect from bending them.

I just bought a cheap hood pin kit that uses steel pins and used those.

With a strong steel hood, I think I'd be perfectly happy with the alloy pins

Well...this has me concerned about using these on my carbon fiber hood...

[stevieturbo]

Originally Posted by CamaroSkooter

Well...this has me concerned about using these on my carbon fiber hood...

As said. My issue was flex leading to bending of the pins.

This was obvious, as in order to open/close the hood easily again, the pins had to be re-straightened.
Only a small amount each time, but still obvious. I really should have changed the pins much earlier.

If you've never experienced this problem, then I'm sure you'll be fine. And on my car it was typically only over 150mph, more usually 170+ where the bending really happened.

[CamaroSkooter]

I was told that the front of my hood appears to "lift" about half an inch to an inch just while traveling down the highway at 80-85 mph.

So...yeah...150mph certainly worries me...

[mylftft]

I just like giving Robert a hard time, I'm always trying to hang with his Racecar in my grocery getter.

[f5journal]

Good Afternoon Robert. I am trying to understand your oil system a bit better. Post 420 and 498 show the supply and return lines. Where is the pump? Did that get modded later to the Turbowerx setup? Also, can the oil system be self contained in it's own reservoir if someone ( a friend of mine) is building a turbo set up. Obviously I'm gathering some edumacation on behalf of that friend.

Thanks

Darryl

[stevieturbo]

Originally Posted by CamaroSkooter

I was told that the front of my hood appears to "lift" about half an inch to an inch just while traveling down the highway at 80-85 mph.

So...yeah...150mph certainly worries me...

Dont like polluting the thread. But this was a photo taken from a 1km event a few years ago. Not sure where the photographer was, but would guess this is around the 150-160mph mark.
I did around 175mph that day, although their timing gear registered 186mph for some reason.

When doing silly things in the dark, I can easily see the headlights from the drivers seat the hood lifts and flexes that much !
I'm amazed it stayed on so long to be honest.
The photo only shows a still obviously, but the bonnet is lifting and flexing quite violently, it isnt just sitting static like in the photo.

[SSE 4 2SS]

Originally Posted by mylftft

I just like giving Robert a hard time, I'm always trying to hang with his Racecar in my grocery getter.

grocery getter, pssshhhh, turd... You're just trying to keep up... bwahahahahahah... I wish my car was as much a daily driver as your is.... I was duly warned and kept pushing anyway... but I got a nice truck to ride in so, no problems here..

Originally Posted by stevieturbo

Dont like polluting the thread. But this was a photo taken from a 1km event a few years ago. Not sure where the photographer was, but would guess this is around the 150-160mph mark.
I did around 175mph that day, although their timing gear registered 186mph for some reason.

When doing silly things in the dark, I can easily see the headlights from the drivers seat the hood lifts and flexes that much !
I'm amazed it stayed on so long to be honest.
The photo only shows a still obviously, but the bonnet is lifting and flexing quite violently, it isnt just sitting static like in the photo.

Bro, pollute all you want... I certainly respect your knowledge about cars, and turbo cars specifically... I'm hoping for some time on the beach in Aberdeen/Ireland,/GB/Wales area... and would love to toss back some pints... It'll happen at some time and would love to hook up... I work all over the world so I know I'll be there at some point... I'll be the redneck looking dude wearing a parka in the summer time...

[SSE 4 2SS]

Originally Posted by f5journal

Good Afternoon Robert. I am trying to understand your oil system a bit better. Post 420 and 498 show the supply and return lines. Where is the pump? Did that get modded later to the Turbowerx setup? Also, can the oil system be self contained in it's own reservoir if someone ( a friend of mine) is building a turbo set up. Obviously I'm gathering some edumacation on behalf of that friend.

Thanks

Darryl

Hey Darryl,

The supply for the oil is the motor oil pump... It is t'ed off at the fitting for the oil pressure sending unit if I remember correctly. This is a small diameter hose feeding into the top side of the turbo, and then is drains out the bottom, into the hoses and box you see. the aluminum box in post 498...

From that sump, the turbowerx pump draws the oil up and pumps it up to the valve cover.

I've never dealt with or considered a stand alone oiling system... Stevieturbo that posted right after you up there can possibly help you out more with that....

A stand alone would create more complexity and worry for me...

[stevieturbo]

I guess there could be pro's and cons to the standalone.

If we are relying on a scavenge pump to remove all oil from the turbos...then clearly that same pump has to be capable..and reliable enough to supply enough oil to them too.

It might even allow a much thinner oil, and the oil should be kept cleaner, no combustion products in the oil..etc etc
I'm sure the system would need a cooler of some sort though

In a rear mount, or where an engine oil supply isnt easy to achieve...I can see the appeal of a dedicated oil system for the turbos.

But the engine supply is well tried and tested, everyone knows it works.

If you were to do a standalone, I would definitely be monitoring pressure in the supply line, and if this fell below a certain level, it would cause engine shutdown. Otherwise if the pump was to fail, you'd soon destroy the turbos.

Yes the pump can fail on a scavenge only system...but you'd soon be aware of this by the plumes of smoke out the back. No catastrophic turbo damage should occur though

Really...cant see any major reasons to say dont do it though.

[Mr Twisty]

Part of the problem is you're getting into uncharted territory with the 5tg gen... I'm sure the ZL1 & Z/28 has been tested plenty at 180+ but you're going well beyond that.

The factory hood is a good design, but some safety redundancy can't hurt.

Have you been looking at chairs & HANS? All kidding aside, that's where I'd like to see you invest in more safety.