Alky Control, how hard can I push it for how long? (Airport Runway)

[Gnx6]

So some local friends and I have access to a Huge Airport Runway (airstrip) for a 4 hour time frame. (He's a state employee don't ask me how he did it). SO obviously besides taking photo's we are going to mess around. There will be a few Vipers, Ford GT's, Mclaren Mp4 12c, Turbo BMW's, Z06's, Audi's etc. I plan on beating all that I can when we race, er umm, test the new modifications to the car. (I realize I have no chance in hell against the Mclaren or GT's)

So here's my question, I run 25 psi on a stock block with Alky and all mods are in my sig. Am I asking for trouble staying wide open throttle for about 30 seconds at this level of boost? Would it be safer to run 25 psi to say 80 mph then hit the switch to go to 15psi for the remainder? (I have an innovative boost control, can set boost wherever I wish) I don't mind turning down power to prevent any damage. Want to have fun but don't want to cook the car. O2's with Alky are typically 810 to 830. Thanks

 

[GetOwnedVette]

Sounds like you just don't want to blow her up If the car is setup to perform properly in the 1/4 mile a whole mile shouldn't hurt her. I understand your concern though since you will be at a high rpm for a good chunk of time at the end. If it is a concern to you I'd say do what you suggested...just drop down the boost for that long portion at the end.

 

[GetOwnedVette]

With that length of track you should easily top the car out anywho.....maybe turn the boost down once she can't go any faster

 

[BOP4ever]

I hope you have a good bottom end and the oil system is ok.
This last year I ran my old Pontiac TA with 455 in it on the road course and the straight was about 3/4 mile long.
It was a the drag strip fwiw... I hit the rev limitor about the 1/8 mile point and running it the rest of the way at 6000 rpm was scary !!!
Those engines are not known for High RPM durability either... After a couple laps I wised up and slipped it into OD .64 and let it cruise at 4000 or so...
Id be scared with the stock bottom end on my buick to do it...

 

[Adrian87]

I too have wondered if a Buick would live trying the Texas Mile event out..

 

[williamsGN]

I've seen enough motor destruction on the track and the street let alone down a runway... you may get a chance to see the inside of your stock block after that.
o2s and 0 knock are irrelevant... sustained RPMs will get any engine, it's just a matter of time.

 

[DR BOOST]

this is a very bad idea.....maybe if it was bone stock, it would be ok. otherwise, turn off the alky and run c-16

 

[Nick Micale]

this is a very bad idea.....maybe if it was bone stock, it would be ok. otherwise, turn off the alky and run c-16

I fully agree with this post!

A customer of mine ran the 135 MPH class on the salt flats this past summer, and he used race gas with a new fuel pump and modified sender.

If I were to run a mile or 2 at WOT with a similar build, I would have a fuel pressure gauge where I could monitor it during the run, even if it was in a temporary mount.

 

[we4Mateo]

I don't think the question is if alky/gas can do it but rather if the motor can take it or not. Does C16 somehow make engines run cooler than alky? I can see using it to stave off detonation when the chambers are getting hot as the coolant temps rise and you're only transferring so much heat at that point anyway, but you'll still need the alky to keep things cool going in. Will the engine take sustained abuse like that though even without detonation. The turbo Buick powered Indy cars would blow up but qualified well. That's when it was determined they'd make better drag racing engines! I've always wondered though if I'd ever see a TR in a TX mile type event.

 

[we4Mateo]

never mind

http://www.turbobuick.com/forums/threads/grand-national-at-the-texas-mile.385864/

 

[turboc87gn]

Do it like this !!!

 

[bison]

I don't think the question is if alky/gas can do it but rather if the motor can take it or not. Does C16 somehow make engines run cooler than alky? I can see using it to stave off detonation when the chambers are getting hot as the coolant temps rise and you're only transferring so much heat at that point anyway, but you'll still need the alky to keep things cool going in. Will the engine take sustained abuse like that though even without detonation. The turbo Buick powered Indy cars would blow up but qualified well. That's when it was determined they'd make better drag racing engines! I've always wondered though if I'd ever see a TR in a TX mile type event.

As noted the engines ability to take the pounding in 4th gear for 30-40 seconds would be the limitation. Not the alky. I wouldn't do it. So many things could go wrong. You could have a head gasket leaking and blow compression into the cooling system and burst hoses/radiator then run the coolant over at 150mph. Not a good day. I can't believe that this type of event is even able to be pulled of. Every second longer of wot mtgs risk multiplies. The car will be experiencing things it never has before. Fwiw almost all of the Indy engines had
Valvetrain related failures. With today's cams and valvetrain tech they would likely lasted much longer. Those Indy engines may
have used a non exotic BMS S2 block but everything else about them was completely long term race. About the exact opposite of a stock block production engine that was never meant to be over 400hp and had a factory limited top speed in the mid 120's

 

[Gnx6]

All interesting.. My plan was not to see what top speed the car could do but just to run a few races a little longer than a 1/4 mile. So if I get out of it around 4500 rpm in 4th or when I feel power is declining I may be safe? Or should I just stick to 15 seconds max of wide open then get out of it? I've heard the car will pull like a freight train with the converter locked in 3rd, wanted to try it...

I will upload video's after. I have a gopro that I will stick on the roof and I have a chest mount harness I can use so you can see the guages..

 

[QWKRTNU]

sub

 

[GetOwnedVette]

this is a very bad idea.....maybe if it was bone stock, it would be ok. otherwise, turn off the alky and run c-16

For sure some 116 octane would take your worries away....Go get 5 gallons for $75 and consider it insurance

Kinda curious to see more on how this goes.....never see our turbo Buicks doing mile runs Be the guinea pig

 

[TexasT]

Subscribed, I cant wait for the vids!

 

[megawatt]

Subscribed ....

 

[Gnx6]

For sure some 116 octane would take your worries away....Go get 5 gallons for $75 and consider it insurance

Kinda curious to see more on how this goes.....never see our turbo Buicks doing mile runs Be the guinea pig

Won't be a mile, some guys have scared me from doing a crazy blast so it will probably be 1/2 mile max... Once the acceleration starts to drop off I am going to lift. Also plan going going to 12 psi shortly after it hits 4th...

Scott

 

[sams86gn]

Dang I was hoping I would find out how long it took before it blew up...jk

 

[DoubleD]

if it was me, I'd fill the tank absolutely full with race fuel, not just 5 gallons. I'd also probably throw some much taller gears in the back (maybe even something in the 2.xx range).

... and I would probably do it in another car.