Competition Orange
Well-Known Member
- Joined
- Aug 25, 2015
- Threads
- 40
- Messages
- 1,402
- Reaction score
- 436
- Location
- Columbus, Ohio
- Vehicle(s)
- 2017 GT350
These will be hub centric correct?
Sponsored
Sponsored
New 19" 6UL tech specs & development
- Thread starter 949Racing
- Start date
- Watchers 9
-
- Tags
- 6ul 949 racing
OP
OP
- Thread starter
- #17
Yup. There is so little room on an S550 (non GT350) that ideal offset varies with alignment, tire choice and method of camber correction if any. If we do a 19x10 +42 or so, that guarantees fitment on full OE style setups with 255's but very few will run that combo. Most want a bit more camber and tire width which requires spacers. We see that a +42 or thereabouts will have almost everyone running a spacer up front. The "poke" in the rear with a 19x10 +37 is exactly the same as a the OEM 350R wheel, which is what most folks are looking for. Flush front and rear while still allowing full bump travel for track use.
Yup. These fitments don't work on anything else so we're building them at 70.5 specifically for this platform.
That said, we have found that hub centricity doesn't add function if the wheels are made right in the first place. All conical seat wheels are functionally lug centric. Meaning the lugs perform the final load bearing location of the wheel, not the hub rings. We have sold thousands of non hub centric wheels for much lighter cars that are far more sensitive to out of round wheels than any Mustang, no issues. IOW, hub centric only serves to make it easier to mount the wheels, not mandatory to get proper centering.
OP
OP
- Thread starter
- #18
Few tweaks since the last image we shared. Closing in on the final form of the new wheel. Cap will be flush instead of the cap we use on our 15/17" wheels. CAD render shows one valve and no logos. Production wheel will have our standard dual opposed valve, VIA certification stamps and logs as usual.
Finish options for the first batch will be Beryllium, Charcoal and Tungsten. Google those terms + 949 Racing and click image tabs to see what they look like.
Finish options for the first batch will be Beryllium, Charcoal and Tungsten. Google those terms + 949 Racing and click image tabs to see what they look like.
sigintel
Well-Known Member
- Joined
- Nov 24, 2015
- Threads
- 59
- Messages
- 2,040
- Reaction score
- 1,069
- Location
- Republic of Texas, God's Country
- First Name
- Ray
- Vehicle(s)
- 2018 GT
All your 18" will clear GT 6 piston Brembos (PP) like APEX EC7?
backs of spokes radiused or sharp edges?
backs of spokes radiused or sharp edges?
OP
OP
- Thread starter
- #20
We will go into more detail of our 18's when those are developed next year. This thread is more about the upcoming 19's.
Sponsored
OP
OP
- Thread starter
- #21
A few more updates.
Load Rating
Passed VIA certification at 10% over standard. So folks understand, VIA standards have load ratings based on PCD and diameter. In the case of a 19" passenger with 5x114.3 PCD, that's 680kg. We have built and tested the 19" 6UL at 770kg. Based on mass properties analysis in CAD, the production 19x11.5 +56 (GT350 rear) should come in at around 25.8 lbs with paint. The 19x10 +37 GT/EB variant will be around 24.5lbs.
Knurled bead
As with all 6UL wheels, the 19" will feature the knurled bead. This helps keep the tire from rotating on the rim under decel/accel torque loads
Caliper clearance
We made a few more changes to the barrel after experiencing issues with other aftermarket GT350 wheels tiny caliper clearance. We got tiny rocks wedged in there that needed clearing out. Also slightly bent another brand wheel. The bend was slight enough to not be a problem but it caused the ribs inside the barrel to scrape on the caliper. Yikes. This was a wheel brand with only about .100 clearance to the front caliper. The 6UL for the GT350 has .200 static clearance to the OEM brakes. Bending track wheels is a fact of life, even for the most robust wheels. A little bit of extra insurance against self machining is a good thing.
Tooling starts in a week or two. Should have samples by mid Jan. We were hoping to have the first production run here by the end of January but we won't make that. Best guess is wheel in stock around late March.
Load Rating
Passed VIA certification at 10% over standard. So folks understand, VIA standards have load ratings based on PCD and diameter. In the case of a 19" passenger with 5x114.3 PCD, that's 680kg. We have built and tested the 19" 6UL at 770kg. Based on mass properties analysis in CAD, the production 19x11.5 +56 (GT350 rear) should come in at around 25.8 lbs with paint. The 19x10 +37 GT/EB variant will be around 24.5lbs.
Knurled bead
As with all 6UL wheels, the 19" will feature the knurled bead. This helps keep the tire from rotating on the rim under decel/accel torque loads
Caliper clearance
We made a few more changes to the barrel after experiencing issues with other aftermarket GT350 wheels tiny caliper clearance. We got tiny rocks wedged in there that needed clearing out. Also slightly bent another brand wheel. The bend was slight enough to not be a problem but it caused the ribs inside the barrel to scrape on the caliper. Yikes. This was a wheel brand with only about .100 clearance to the front caliper. The 6UL for the GT350 has .200 static clearance to the OEM brakes. Bending track wheels is a fact of life, even for the most robust wheels. A little bit of extra insurance against self machining is a good thing.
Tooling starts in a week or two. Should have samples by mid Jan. We were hoping to have the first production run here by the end of January but we won't make that. Best guess is wheel in stock around late March.
OP
OP
- Thread starter
- #25
Got a local owners GT in the shop for pics today. BC coilovers, stock alignment on this one. Our GT350 has -4.5° front camber so the gap there is a bit more than usual 
Visit the site for more info http://949racing.com/19-wheels.aspx
Visit the site for more info http://949racing.com/19-wheels.aspx
Sponsored
OP
OP
- Thread starter
- #26
Visit 949Racing.com for prices and ordering info
Specs for the 19" 6UL
19x10 +37 23.8 lbs
19x11 +50 24.7 lbs
19x11 +24 GT350 Front 25.6 lbs
19x11.5 +56 GT350 Rear 24.5 lbs
These are actual maximum weights, with cap and valves. Wheels average a bit lower. This is at our JWL+10 load rating, which no other wheel on the market is engineered or VIA certified for. That we are in the same raneg or lighter than all other flow formed wheels of the same size/offset at higher load rating shows the inherent strength to weight ratio of the now 12 year old 6UL design. Roughly speaking, adding load rating directly corresponds to wheel mass. For example, take a 10 lb wheel rated for 500kg, increase it's load rating by 10% to 550kg and the weight will become about 11 lb. The takeaway from this is that if the 19" 6UL were engineered to the same lower standard as other flow formed wheels on the market, it would be 10% lighter.
Theoretical weights of standard load rated 19" 6UL
19x10 +37 21.4#
19x11 +50 22.2#
19x11 +24 23#
19x11.5 +56 22.3#
Our goal was a no compromise race wheel. Track wheels get bent, that is a fact of life. The stronger we can make them, the longer your investment will last. We have managed this without compromising brake clearance, stiffness or weight.S o yeah, we're pretty proud of these
From the website:
The all new 19" 6UL represents a clean sheet design based on our now iconic 6 U shaped spoke pattern. For the larger 18 & 19" sizes we increased the max load rating 10% over industry standard. We have the only 18 or 19" wheel on the market
that is VIA certfied for 10% greater impact, radial fatigue and cornering fatigue load. A few other brands use the standard load rating and simply run the test for more cycles on one criteria, not all three. The 18 and 19 6UL wheels have the greates strength to weight ratio
of any wheel on the market today. This translates to a stiffer wheel which means better steering response and less camber load deflection.
The 18 & 19" 6UL retain the 6UL standard knurled bead and dual valve configuration. The knurled bead helps to keep the newly mounted tire from rotating on the wheel, which can cause an imbalance condition. The second valve is located at 180° is used for purging moisture laden air from dirty tire shop air compressors. This moisture creates large temperature and pressure fluctations under high performance driving conditions which can create handling imbalances and loss of grip. We prefer nitrogem purging when it is available but a dry air source will also work.
All 6UL wheels are designed for a minimum of .120 (3mm) staitic clearance to target brake caliper. On the GT350, we upped that to .200 (5mm). We have seen, particularly on the GT350 Mustang, that some aftermarket wheels have less than .060 (1.5mm) static brake clearance. This is insuffcient to allow proper airflow and gravel debris clearance. Even the stiffest wheels flex under 1G+ cornering loads which can lead to intermittent contact between the bareel and brake system if inadequate clearance is engineered in. The 19" 6UL wheel set for the GT350 has a minimum of 5mm clearance at the caliper and a whopping 10mm in the barrel.
Specs for the 19" 6UL
19x10 +37 23.8 lbs
19x11 +50 24.7 lbs
19x11 +24 GT350 Front 25.6 lbs
19x11.5 +56 GT350 Rear 24.5 lbs
These are actual maximum weights, with cap and valves. Wheels average a bit lower. This is at our JWL+10 load rating, which no other wheel on the market is engineered or VIA certified for. That we are in the same raneg or lighter than all other flow formed wheels of the same size/offset at higher load rating shows the inherent strength to weight ratio of the now 12 year old 6UL design. Roughly speaking, adding load rating directly corresponds to wheel mass. For example, take a 10 lb wheel rated for 500kg, increase it's load rating by 10% to 550kg and the weight will become about 11 lb. The takeaway from this is that if the 19" 6UL were engineered to the same lower standard as other flow formed wheels on the market, it would be 10% lighter.
Theoretical weights of standard load rated 19" 6UL
19x10 +37 21.4#
19x11 +50 22.2#
19x11 +24 23#
19x11.5 +56 22.3#
Our goal was a no compromise race wheel. Track wheels get bent, that is a fact of life. The stronger we can make them, the longer your investment will last. We have managed this without compromising brake clearance, stiffness or weight.S o yeah, we're pretty proud of these
From the website:
The all new 19" 6UL represents a clean sheet design based on our now iconic 6 U shaped spoke pattern. For the larger 18 & 19" sizes we increased the max load rating 10% over industry standard. We have the only 18 or 19" wheel on the market
that is VIA certfied for 10% greater impact, radial fatigue and cornering fatigue load. A few other brands use the standard load rating and simply run the test for more cycles on one criteria, not all three. The 18 and 19 6UL wheels have the greates strength to weight ratio
of any wheel on the market today. This translates to a stiffer wheel which means better steering response and less camber load deflection.
The 18 & 19" 6UL retain the 6UL standard knurled bead and dual valve configuration. The knurled bead helps to keep the newly mounted tire from rotating on the wheel, which can cause an imbalance condition. The second valve is located at 180° is used for purging moisture laden air from dirty tire shop air compressors. This moisture creates large temperature and pressure fluctations under high performance driving conditions which can create handling imbalances and loss of grip. We prefer nitrogem purging when it is available but a dry air source will also work.
All 6UL wheels are designed for a minimum of .120 (3mm) staitic clearance to target brake caliper. On the GT350, we upped that to .200 (5mm). We have seen, particularly on the GT350 Mustang, that some aftermarket wheels have less than .060 (1.5mm) static brake clearance. This is insuffcient to allow proper airflow and gravel debris clearance. Even the stiffest wheels flex under 1G+ cornering loads which can lead to intermittent contact between the bareel and brake system if inadequate clearance is engineered in. The 19" 6UL wheel set for the GT350 has a minimum of 5mm clearance at the caliper and a whopping 10mm in the barrel.
Doward
Dan @ 949 Racing
- Joined
- Aug 18, 2017
- Threads
- 0
- Messages
- 3
- Reaction score
- 8
- Location
- Aliso Viejo, CA
- First Name
- Dan
- Vehicle(s)
- A bunch of non-mustangs
Brake Clearance.
We touched on this in the earlier posts, but this is a big deal.
The 19" 6UL wheel for the GT350 has a minimum of 5mm clearance at the caliper and a whopping 10mm in the barrel. Other wheels we've measured personally have had less than .060"(1.5mm) of static clearance.
Today, during our photo shoot of another pair of local Shelby GT350/Rs, we noticed some really severe caliper damage on both cars. The R looks particularly bad because of the red calipers.
Caliper and wheel damage with another common aftermarket 19x11" wheel:
The wheels we've been running on track have not held up well. Our car, and the two other local cars show some pretty severe damage to both the calipers and the other aftermarket replacement wheels that were used on track.
Some of the small scratches are simply gravel getting wedged between the wheel barrel and caliper. This can be alleviated by simply engineering in more static clearance.
However, the black paint smeared onto this GT350R's calipers is from the weaker 690-700kg rated wheels flexing in use, or bending so bad that they make full physical contact with the caliper. We had the same issue on our car at SuperLapBattle and actually had to remove the wheels from the car and hammer them back round to continue driving. This dynamic clearance issue is solved with a stiffer wheel.
Static clearance with 949 Racing 6UL:
We touched on this in the earlier posts, but this is a big deal.
The 19" 6UL wheel for the GT350 has a minimum of 5mm clearance at the caliper and a whopping 10mm in the barrel. Other wheels we've measured personally have had less than .060"(1.5mm) of static clearance.
Today, during our photo shoot of another pair of local Shelby GT350/Rs, we noticed some really severe caliper damage on both cars. The R looks particularly bad because of the red calipers.
Caliper and wheel damage with another common aftermarket 19x11" wheel:
The wheels we've been running on track have not held up well. Our car, and the two other local cars show some pretty severe damage to both the calipers and the other aftermarket replacement wheels that were used on track.
Some of the small scratches are simply gravel getting wedged between the wheel barrel and caliper. This can be alleviated by simply engineering in more static clearance.
However, the black paint smeared onto this GT350R's calipers is from the weaker 690-700kg rated wheels flexing in use, or bending so bad that they make full physical contact with the caliper. We had the same issue on our car at SuperLapBattle and actually had to remove the wheels from the car and hammer them back round to continue driving. This dynamic clearance issue is solved with a stiffer wheel.
Static clearance with 949 Racing 6UL:
Zissou
Well-Known Member
- Joined
- Mar 19, 2018
- Threads
- 18
- Messages
- 194
- Reaction score
- 94
- Location
- Charlottesville
- Vehicle(s)
- 2016 GT/CS
Will there be a group buy?
Sponsored