lynndm

Can anyone tell me the tallest height Race Ramp that will fit under my '14 Z51 roadster with stock ride height and stock tires? Never thought I'd be in the market for these, but with having to drive up on a two by six to get my jack underneath the car, I'm looking for an easier way to do oil changes and such.

Doug

Pineapple

I'd go with 10" or 12". I have 8" Race Ramps and it's a bit tight under there.

BlueDevilZ51

If your at stock ride hight get the 56" ones... They worked for me until I lowered the car then I needed to also by the extenders...

0Fred@ReverseLogic

The RR-56-2 (8" high), RR-XT-2 (10" high), and RLL-78-2 (12" high) all have a 10.8 degree incline. Your car should have about 1/4" clearance to the air dam with these ramps placed up against the tires. This clearance will increase as soon as the car starts to climb the ramps. This is because the effective approach angle increase as the front tires climb the ramps and the rear tires are still on the ground.

You can visualize the car-to-ramp clearance by placing one end of a yardstick up against a front tire foot print and propping up the other end so that is is raised 7.25" above the ground. You can prop the yardstick up anywhere along its length with whatever is convenient.

The 12" high ramps are a Reverse Logic part number.

https://www.reverselogic.us/constant-incline-ramps

taz2016

10" work well for me on my 2017 Z51. I would not get them any shorter.

0Fred@ReverseLogic

Using the extenders changes the initial incline from 10.8 degrees to 6.8 degrees. The extenders convert a constant incline ramp to a two-stage incline ramp, meaning that the initial incline is more shallow than the second stage slope.

Several two-stage ramp models have integrated extenders. These include the RR-72-2, RLL-80-2, and RLL-87-2 models. If you know that you need the lower incline when you are ordering the ramps, the two-stage incline ramps are less expensive than combining a constant incline ramps with the optional extender. The two-stage incline ramps are a more elegant solution and are easier to use and store.

Dif

I bought the 67" 2 piece Ramps 10" high and to do oil changes.
Used them with the C6 and now the C7.
Also used them once to install front & rear Z51 Sway Bars when I had the C6.
Thought about getting the 78" 2 piece 12" high, but they're close to $150.00 more.
Take your pick, but I recommend the 2 piece

lynndm

I appreciate the information. I just got off Craigslist and found a set of 8 in tall 2 piece ramps and 10 in high cribs for $175. Only catch is another guy is supposed to come and get them next Wednesday but if doesn't show, they're mine. About 60 mile drive but well worth it. If I have to buy new, I like the description of the built in extenders and probably go 10 or 12 inches high if they'll fit.
Probably don't need the cribs as I have lots of jack stands and a floor jack that I can get under the third member mount for the back.

Doug

lynndm

Fred, will the RLL-TR-87-2 work under my car?

Doug

Patman

I have the 56" ones and mine is lowered as far as it can go on stock bolts and they still work fine for me. The rubber air dam on the front does bend a little when going up the ramps but that's not a big deal to me and I still have lots of room get underneath it to change the oil.

0Fred@ReverseLogic

The RLL-TR-87-2 trailer ramps work best with a trailer that has a high deck. They do have an initial incline of 6.8 degrees, so they will work with the approach angle on your car.

You can get a confirmation of the car-to-ramp clearance using the trailer ramp calculator at www.reverselogic.us/race-ramps

BlueDevilZ51

Im also lowered all the way on the stock bolts. The 56" ramps worked fine then but after I installed an Edelbrock Supercharger they didn't work. The extra 100 lbs on the nose of the car had me just a little too low so I needed the extenders.

Patman

That blower's a good problem to have!

lynndm

Fred, what it boils down to is I need the ramp that gives me the highest lift and will still work with my car. What is your recommendation and if you can, what is your price on these shipped to Dallas?

Doug

0Fred@ReverseLogic

I misunderstood your question about the RR-TR-87-2 trailer ramp. I assumed you wanted to use it with a trailer. Using this trailer ramp as a service ramp is not really optimal. Even though the ramp is 12" high at the highest point, it would be just over 10" high in the middle of the second stage section where the front tire would be positioned. As a service ramp, this model would not offer any more height than the RLL-87-2 with a 10" high platform. Also, I don't think there will be enough room behind the front tire to use a wheel chock in case you wanted to remove the incline sections.

A couple of years ago I started selling the 12" high RLL-78-2 ramp in response to requests for a higher ramp. It is basically an oversized version of the 10" high 67" RR-XT-2 ramp. Some customers use the RR-EX-14 Xtender ramps with the 78" ramp, but, this makes the ramp over 100" long.

With a 12" high ramp, it's more difficult to get a floor jack under the rear of the car when the front tires are on the ramp platforms. In some cases, with long wheelbase vehicles, it's possible to use Roll-ups or Trak-Jax under the rear tires to make more room for a floor jack. With short wheelbase cars, there's usually not enough room to use Roll-ups with anything longer than an 80" ramp.

Other considerations with 12" high ramps and low ground clearance cars are the possibility of scraping the tail pipes when driving up the ramps or ripping off the front bumper when backing onto the ramps.

I will be featuring a new ramp model at the Spring Carlisle Car Show next month that addresses some of these issues. It will not be an inexpensive solution and some forum members will probably scoff at the design and price. This RLL-116-3 ramp is a three section ramp with three progressively steeper inclines. The center section has tapered ends to make it easier to remove once the car is on the ramps. An optional extension will be offered for longer wheelbase cars. All the sections are less than 48" long and the ramp can be transported with a mid-size SUV or short-bed pickup. This ramp was developed to meet the requirements of customers wanting to inspect very low ground clearance cars in the field.

This ramp will only be available in a heavy duty version (2500# per tire capacity). It will feature a double textured bottom surface and will include a pair of Race Ramps wheel chocks.

lynndm

Sounds like I need to go for a 10 inch high solution. What is the model number of the recommended 10 inch ramp that you suggest?

Doug

0Fred@ReverseLogic

RLL-87-2

https://www.reverselogic.us/2-stage-incline-ramps

Vette E Boop

LT1 Z51

If you have a "Stage 2" or "Stage 3" front spoiler/splitter you need the extenders as the regular incline is too steep. If you don't have those or you have the poverty "Stage 1" front spoiler/splitter then the regular incline is fine.

Mike Mercury

I'd recommend 10" minimum.

If you're handy with a saw...




details here:
http://tim-yvonne.com/mikemercury/ramp.htm