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Old Dec 16, 2004 | 01:52 AM
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Default lapd tunnel plate

did i miss something about the lapd plate they sell that would make it worth how much it costs
correct me if im wrong but its just a 1/4 inch piece of t6 aluminum with holes drilled in it right
cant really tell by the pic but does it have any weird bends are anything
i have a machine and fab shop right down the street from me which i know both the owner and a few coworkers well enough that if i give them a cardboard template they will make me one for free out of whatever i want (stainless aluminum even titanium)
just wondering if its worth the trouble of getting it made
im about to pull the h-pipe to gut the pup cats so while its off it wouldnt be nothing to make a template
what are the advantages of it
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Old Dec 16, 2004 | 06:13 AM
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elite engineering makes a plate out a alum for 130 bucks,, yup you can make one easy .....go for it..
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Old Dec 16, 2004 | 09:26 AM
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That fab shop sown the street would be giving you a $25 piece of aluminum plate and probably 2-4 hours of their time to cut the external shape correctly and drill the holes. That's a nice gift. The vendors of these plates like Elite Engr. waterjet cut them and have running orders of a couple dozen with their fabricators and material suppliers to keep costs down.
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Old Dec 16, 2004 | 09:59 AM
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Keep in mind, Elite Engineering along with the other vendors also offer a coating to reduce the amount of heat transfer from the exhaust pipes to the interior cabin.

Yes, you “could” make a template, cut, drill one for yourself. But unless you have the machining capabilities, it would be like painting your car with a paintbrush.

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Old Dec 16, 2004 | 11:38 AM
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There's nothing special about them at all. Just get the materials (cheap, $25-40), and cut it yourself or have the machine shop cut it. With the right tools it takes maybe...30 mins to cut and drill the plate. It's a very simple design.

I cut mine with an angle grinder because none of my other tools were powerful enough to cut through the aluminum. It was easy, but came out rough. Here's a pic before I smoothed down the edges:

http://fear.net/~dope/corvette/suspe...nnel_brace.jpg

Who cares how it looks, you have to disassemble part of the car just to see it! It's like buying a chrome crankshaft.

Dope
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Old Dec 16, 2004 | 11:38 AM
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Also, no need to make a template. Just pull the stock cover off and give it to them. All I did was trace out the shape and holes with a magic marker.

Dope
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Old Dec 16, 2004 | 03:38 PM
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anyone know the difference in strenth between aluminium and titanium
obviously the titanium would be the lighter of the 2 but not sure of its strenth
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Old Dec 16, 2004 | 05:30 PM
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Originally Posted by Elite Engineering
Keep in mind, Elite Engineering along with the other vendors also offer a coating to reduce the amount of heat transfer from the exhaust pipes to the interior cabin.

Yes, you “could” make a template, cut, drill one for yourself. But unless you have the machining capabilities, it would be like painting your car with a paintbrush.


Coating makes a big difference in heat reduction.
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Old Dec 16, 2004 | 06:37 PM
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Originally Posted by Vette 4 Fun

Coating makes a big difference in heat reduction.
I hope that the DYI guys realize that the product has been made available by vendors simply as a convenient way for those who have neither the time or sklills to do them. As with any product on the Market The customer has the choice to buy or not. Please do not turn this into another vendor bash. Thanks from all of us. Mark
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Old Dec 16, 2004 | 06:44 PM
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Originally Posted by gmosley
did i miss something about the lapd plate they sell that would make it worth how much it costs
correct me if im wrong but its just a 1/4 inch piece of t6 aluminum with holes drilled in it right
cant really tell by the pic but does it have any weird bends are anything
i have a machine and fab shop right down the street from me which i know both the owner and a few coworkers well enough that if i give them a cardboard template they will make me one for free out of whatever i want (stainless aluminum even titanium)
just wondering if its worth the trouble of getting it made
im about to pull the h-pipe to gut the pup cats so while its off it wouldnt be nothing to make a template
what are the advantages of it
Yes, you missed something.... this subject has been previously addressed in approximately 14000 plus threads. For what it worth. LAPD has been an Outstanding provider of quality Accessories, Services and Products to the forum and Corvette enthusiests everywhere. I for one would really think especially in the holiday season that any type of negative criticizm be kept to ourselves and allow their livleyhoods to go on. There has been way too much bashing of the vendors and products to warrant any more. There are alternatives offered and comments to derail a vendor are not necessary.
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Old Dec 16, 2004 | 07:00 PM
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Mark, let's not overreact. We can all agree that this product does not involve rocket science - it is a more substantial substitute for the GM part, which may or may not be made out of aluminum, or stainless, in varying thicknesses, and with or without coating. If someone has the time, skill and/or contacts to make it themselves, fine. If someone wants a coated stainless part, already made, to be purchased and installed by the vendor locally, then we know where they should go and if they want the aluminum part, and do not wish to make it themselves, we know where they can go, also, etc., etc. I did not view the original post on this thread as being offensive (being a lawyer I may just have developed a very thick skin). Happy Holidays, Mark, by the way
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Old Dec 16, 2004 | 07:00 PM
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"what are the advantages of it"

Only 1. Cooler interior.
Very rough ride after install.
Not any faster in corners. Not even 1 mph.
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Old Dec 16, 2004 | 07:10 PM
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Originally Posted by mountainbiker2
"what are the advantages of it"

Only 1. Cooler interior.
Very rough ride after install.
Not any faster in corners. Not even 1 mph.
Have you installed one? Edit - never mind, I see that you did and the above summarizes your experience.

Last edited by allanlaw; Dec 16, 2004 at 07:13 PM.
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Old Dec 16, 2004 | 07:10 PM
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Originally Posted by mountainbiker2
"what are the advantages of it"

Only 1. Cooler interior.
Very rough ride after install.
Not any faster in corners. Not even 1 mph.
That hasn't been my experience at all. The car just feels tighter because the chassis is stiffer. I also get less creeks going up steep inclines at an angle (my driveway).

I chose the Elite Engineering product. When the plates first came out, I thought the price was high enough that I could justify making for myself.

But at $130, you can't make one yourself (at least one with that level of finish).

...and, if you're making ONE, I'm gonna bet you can't do it in 30 minutes with hand tools

If I still had access to machining equipment, I'd do it myself just for the fun of it, but saving money wouldn't be the motivation when you can pick it up for $130
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Old Dec 16, 2004 | 07:35 PM
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Originally Posted by gmosley
anyone know the difference in strenth between aluminium and titanium
obviously the titanium would be the lighter of the 2 but not sure of its strenth
Depends upon which alloy your referring to. There are many Al and Ti alloys available.

A typical Al alloy, 6061-T6, has a yield of around 276MPa and a density of 2.7g/cc.

A typical Ti alloy, grade-5, has a yield of 880MPa (3.1X that of 6061-T6) and a density of 4.4g/cc. Note that its NOT lighter than Aluminum....but it is 60% the weight of steel or stainless steel.

Additionally the modulus of elasticity of the 6Al4V Ti alloy is 1.7X that of the 6061-T6 (i.e. much stiffer).

Because of these properties you could make a Ti plate that is thinner than the Al plate and have better stiffness and strength...but it would be quite pricey....would depend on the design as to whether it was actually lighter weight or not.

Last edited by SnowyATX; Dec 16, 2004 at 07:54 PM.
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Old Dec 16, 2004 | 07:46 PM
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Originally Posted by gmosley
anyone know the difference in strenth between aluminium and titanium
obviously the titanium would be the lighter of the 2 but not sure of its strenth
Not true....Titanium is 60% heavier than aluminum and 40% lighter than steel. Titanium has about 2-3 times the strength of aluminum but is about 8 times more expensive. Making a tunnel plate of titanium would be heavier and much more costly than a commercially available aluminum one....not a good idea.

Last edited by HIGHRPM; Dec 16, 2004 at 07:48 PM.
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Old Dec 16, 2004 | 07:58 PM
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Originally Posted by gmosley
did i miss something about the lapd plate they sell that would make it worth how much it costs
correct me if im wrong but its just a 1/4 inch piece of t6 aluminum with holes drilled in it right
cant really tell by the pic but does it have any weird bends are anything
i have a machine and fab shop right down the street from me which i know both the owner and a few coworkers well enough that if i give them a cardboard template they will make me one for free out of whatever i want (stainless aluminum even titanium)
just wondering if its worth the trouble of getting it made
im about to pull the h-pipe to gut the pup cats so while its off it wouldnt be nothing to make a template
what are the advantages of it
gmosley,

It is really up to you. If you feel that you can make a quality plate like what we offer for less, go right ahead. There is nothing wrong with that. If you would like to purchase a plate and simply bolt in on without the headaches of doing it yourself which most forum members would probably rather do, we offer two versions of the tunnel plates.

We did what we could to drop the pricing of our plates. Our 1/4" black ceramic coated tunnel plate is now: $199.95 and our 3/8" black ceramic coated race plate is: $275.00 which is worth it for those C5 and C6 owners that want the ultimate in chassis stiffness and road holding characteristics.

You can see them both on our site under Exterior Accessories under sub-section Protection and scroll to the bottom.

Thanks!

Shawn
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Old Dec 16, 2004 | 08:43 PM
  #18  
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Default man

ok i can see where maybe someone could get the idea of the post being negative the main thing i was wondering is the bends
like i said i can get the plate made for FREE
out of whatever matierial i want just wanting to know what everyone else would make it from like i said FREE matierials cost me nothing machining costs me nothing
have any size thickness in just about any alloy you could name
this is a machine shop that specializes in building exotic metal fabrication for chemical plants and what not
they have about 4 waterjets and numerous cnc machines all i have to do is give the man what i want made and thats it
no cost nothing

seems like everyone is on edge around here
must be the stress of Christmas
oh well like i said what would you get if you had those options
im thinking the thinner titanium would be best but dont know
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Old Dec 16, 2004 | 08:46 PM
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Can they make you a free cupholder???
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Old Dec 16, 2004 | 09:15 PM
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Originally Posted by allanlaw
Mark, let's not overreact. We can all agree that this product does not involve rocket science - it is a more substantial substitute for the GM part, which may or may not be made out of aluminum, or stainless, in varying thicknesses, and with or without coating. If someone has the time, skill and/or contacts to make it themselves, fine. If someone wants a coated stainless part, already made, to be purchased and installed by the vendor locally, then we know where they should go and if they want the aluminum part, and do not wish to make it themselves, we know where they can go, also, etc., etc. I did not view the original post on this thread as being offensive (being a lawyer I may just have developed a very thick skin). Happy Holidays, Mark, by the way
Not at All. As a lawyer I know youy are more literal about context. Noted thanks. I am just trying to head off the normal bandwagon rebel rousers who will chime in and start it all over again. This way we are aware at the start. I have priced the cost to do Titanium and our cost without markup is at $350 a plate plus or minus any cheaper suppliers being found. Any takers at $500 a plate??????

Last edited by 30yeardream; Dec 16, 2004 at 09:18 PM.
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