Hey guys i came across this site: https://www.minagallery.com/jaguar-x...ulley-upgrade/ this is for the supercharger pulley not the crank pulley like velocityap offers, minagallery claims 17-25 hp gains, has anyone tried this cuz $275 is a lot cheaper and also easier to install as well than a crank pulley.

 

Lifted from another forum:

"The stock V6 supercharger pulley is already smaller than the stock pulley on a 5.0L V8 Supercharged. As a result, reduction in size requires the supercharger snout to be shaved, and only yields 3/4 of a lb of additional boost. It is a lot of work for not a lot of return. Consequently, the V6 is best served by removing the crank pulley and bolting on our larger pulley to increase the supercharger drive. The VAP Crank Pulley kit includes a new tensioner pulley and belt."

Also, reducing the size of the SC pulley also reduces the already small contact area it maintains with the belt, which will INCREASE the likelyhood of belt slippage. In contrast, the crank pulley will increase the contact area at the pulley and REDUCE the likelyhood of slippage at that pulley.

Some people have had nightmares putting in the SC Pulley, its easy to get wrong.

 

awesome thanks for the info, ill guess I'll go straight for the crank pulley then.

 

Agreed, a smaller SC pulley on the V6 is a waste of time and money (as well as being a PITA to fit), you are much better off going with a larger crank pulley, either VAP or Eurotoys like I have (they are effectively identical). But you WILL need a tune as well (more $) with the larger crank pulley otherwise the car will go into restricted performance (ie limp) mode every time you floor it. No sacrifice there as the pulley and tune takes it to 450 hp and is by far the best bang for your buck on the Jag V6.

 

Here is the dyno for the 6cyl AJ126 with the Velocity AP tune and lower pulley upgrade. Add 18 to 20 Pct for drive train losses, 385WHP x 1.18 gets you 454HP at the crank.

 

I get its good bang for buck. But a tune for 1000 is ****ing retarded. and the cnc part for 1000 is also ****ing retarded. Those parts on any other application would be 250 each tops./

You can buy most turners for like 500 or less. So this is a scam Rip-off. I am actually working with someone who bought one and is letting me 3d scan it at work lol. Going to cnc my own and then I will buy the tune simply to save time. But I could spend less with a custom tune at a car shop near me lol. (which if I got exhaust, intake etc it would be better anyway) this tune is only good for ONLY that, MAYBER their exhaust too. But the one they have sucks *** anyway.

its 2k because they are the first. The profit margin on those parts is probably 500%.

But why not do both the lower AND upper? with a tune. lol an extra 275 bucks lol

 

Agreed, the cost of the tune + pulley and especially the pulley is a bit steep.
But you gotta remember it's a very small market compared to others in the modified SC field such as Chevy/Corvette, Mustang etc and a lot of the price reflects the R&D and after-sales service.
Also the shop I took my F-Type to to have the lower pulley fitted some 3.5 years ago now commented that the price was way high and they would look into making their own (they are a specialist Triumph, Rover and JLR wrecker and mechanical shop).
Lo and behold the last time I was there a couple of months ago the boss took me out the back to show me "something special". It turned out to be a big box of their own CNC milled larger crank pulleys for the AJ133 and AJ126. He didn't let onto the price and just said "they haven't been released yet but they will be a helluva lot cheaper than the one you bought.''

 

​​​​Hey, I have the Mina Gallery upper supercharger pulley installed, if my research is correct it adds 1.6 lbs of boost to bring the 3.0 HP up to almost the S HP rating. I believe the stock psi is around 24.5 lbs and would result in approximately 26.1 lbs of boost after installation. I also have read somewhere that stock psi rating on the S model is 27 lbs. So, a good tune with 93 octane might get you at 380 HP. If anyone else has more accurate info please add to this or correct me on it, I won't be offended.

 

Installation for Mina Gallery pulley was pretty straightforward, gotta heat the pulley up to 650 degrees F. to expand it and then slide it over the shaft, wait for it to cool and reinstall belt.

 

if you are referring to absolute pressure, your numbers are close. However, they are nowhere near the actual “boost” levels…

The AJ126 will make in region of 12psi of “boost” stock and 15psi of “boost” when tuned(stock pulley ratio). If we’re talking absolute pressure, it would be 26.5psi stock vs 29.5psi tuned.(ambient pressure being 14.5psi).

Nonetheless, it doesn’t matter which pulley you have, the AJ126 engine will make a max of 12-13psi of “boost” unless the ecu is tuned. There’s also no difference in the pulley sizes from a base model to something like the “S” or “400” trim, it’s just the file that limits the power after 10 seconds of max power supplied.

 

Absolutely agree, can't remember what article I had read, just remember the numbers being very close to each other regardless of just an upper pulley swap. Did it mostly for bragging rights on aftermarket install. Plus CAI makes the supercharger whine very distinct. Thank you for the info!

 

There is a difference in the pulleys offered from Mina gallery and Velocityap. The velocityap has three piece construction to aid in installation, and it has a Griptech coating which keeps belt slipping at bay. This is a big deal. Other pulleys this diameter are known to slip when you eventually add that Crankshaft Pulley. I have had great success with velocityap products. Currently running both pulleys and the E85 tune for 560Hp.

 

VAP is having their annual sale through Dec 1…

Braking Products: 10%
ECU Tuning: 25%
Engine & Drivetrain: 15%
Exhaust: 25%
Springs: 25%

 

Thank you. I've been waiting for this to order my downpipes. lol

 

Thanks! I've been waiting for this sale to order my downpipes, lol.