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I’ve noticed my temps are about the same as what you’ve experienced. There’s a huge difference in performance. Next spring I’m ditching my NS1 cam and going bigger.
I'm running a smaller pulley also. You might consider switching to a 65mm.
Harrop has said that their standard 70mm pulley allows their kit to run with stock injectors & tune, but if you're not limited by that, they also offer 65, 60, and even 55mm pulleys. At some point you will be into detonation. (Note that there can be belt slippage problems at high rpm with the smaller Harrop pulleys, but RMW offers a re-designed tensioner that provides more belt-wrap, eliminating slippage.)
My 1.8L stroker (12.5% larger) requires that much more air for the same boost. I'm currently running a 60mm pulley, plus ATI's 2% overdrive crank pulley.
With the 2% crank pulley, I'd expect you would get more than 14.8 psi. One of the things I was told to do was use all new seals and use RTV on all metal to metal surfaces...like between the horn and the supercharger. You can probably see where I used blue RTV in these pictures.
So what's the power gain of these new superchargers vs thee stock ones on a relatively stock mini S? Are they worth the money?
Just getting rid of the plastic intake is almost worth it by itself. LOL
Seriously though, I know a few people with them on stock engines and they all say there is more top end power compared to the M45 with a 15% pulley. I don't know of anyone personally who has done any Dyno pulls to see what the gain was.
With the 2% crank pulley, I'd expect you would get more than 14.8 psi. One of the things I was told to do was use all new seals and use RTV on all metal to metal surfaces...like between the horn and the supercharger. You can probably see where I used blue RTV in these pictures.
my mechanic and his crew is pretty **** and experienced with a lot of racing engines so I would be pretty confident they used new seals. Not positive about the sealant but they are experienced with rebuilds.
my mechanic and his crew is pretty **** and experienced with a lot of racing engines so I would be pretty confident they used new seals. Not positive about the sealant but they are experienced with rebuilds.
For what people are paying for the kits....I'm shocked that nobody has done a before/after Dyno pull to see how much power they gained......or maybe they have, but nobody wants to admit that they only gained 10-15hp after the big investment 😀
For what people are paying for the kits....I'm shocked that nobody has done a before/after Dyno pull to see how much power they gained......or maybe they have, but nobody wants to admit that they only gained 10-15hp after the big investment 😀
Most of the people I know that make the investment aren't looking to stay stock, so they really don't have any interest in the before and after. They have bigger things in mind. One of the people I know is doing a built bottom end right now so...
Puttn, I'm not quite understanding...
I don't know if the M45 pulleys will even bolt-up to the TVS, or have the correct alignment. Is 17% possibly what you were running prior to the Harrop TVS kit? (If you are running the Harrop 70mm pulley, you can't be running the Alta 17% pulley at the same time.)
Which pulley are you currently running on the TVS?
Maybe it's just me....but for $3,300 (not including install).....I would want to know how much power my hard earned money had gotten me. That's a good chunk of cash.....and depending on how much power it added, might have been better spent on a single turbo kit (under $3,000).
Maybe it's just me....but for $3,300 (not including install).....I would want to know how much power my hard earned money had gotten me. That's a good chunk of cash.....and depending on how much power it added, might have been better spent on a single turbo kit (under $3,000).
Just saying......
Yeah, you're not going to get a reliable turbo kit for that much. LOL
To do it right, you're looking at $5-8k. Can it be done for cheaper? Sure, but you're going to have issues. Most people that go this route are looking the reliability and simplicity aspect of it and the ability to build on the current platform. For example, a friend of mine did a turbo swap on his with a second hand RMW turbo kit. His car was down for a couple months during the whole thing. Turned out great though and estimated WHP is around 320 on thestock head and stock bottom end...but he's still trying to sort out some issues.
Maybe it's just me....but for $3,300 (not including install).....I would want to know how much power my hard earned money had gotten me. That's a good chunk of cash......
That $3300 for the TVS kit is substantially less than what ECS (or MINI) wants for a new M45 stock supercharger (not including water pump). So if your supercharger is dying, The Harrop kit is both lower cost, and a higher performance option (with less charge heating) compared to new/stock: https://www.ecstuning.com/b-genuine-...w/11657526657/ (Some people have had good success with rebuilt superchargers, others have not.)
It's often not practical to do both before & after dyno tests, especially if the "before" motor is near end-of-life, or if a part like the TVS is installed as part of a larger combination upgrade. (Both were true for me.) My "after" numbers are 285HP with a broad torque curve. If I had chosen "peaky", 300HP was within reach, but the TVS was part of a system-approach, not a stand-alone item. Just having those dynamometer numbers for a single part doesn't provide any guidance if you are looking at one component of the system.
You can demonstrate the same point with a good performance header compared to stock: By itself on a stock motor the header adds maybe 15HP, so is it worth it? The answer is YES if you want to exceed 225HP with almost any combination of parts.
Puttn, I'm not quite understanding...
I don't know if the M45 pulleys will even bolt-up to the TVS, or have the correct alignment. Is 17% possibly what you were running prior to the Harrop TVS kit? (If you are running the Harrop 70mm pulley, you can't be running the Alta 17% pulley at the same time.)
Which pulley are you currently running on the TVS?
My bad, meant I was at 17 and now I have the 70mm.
Maybe it's just me....but for $3,300 (not including install).....I would want to know how much power my hard earned money had gotten me. That's a good chunk of cash.....and depending on how much power it added, might have been better spent on a single turbo kit (under $3,000).
Just saying......
For me, my clutch was going south so it was a good time to make the upgrades I wanted. Besides, at 76 I want to be enjoying this little car as much as possible. At some point I may go the Turbo route once I get to the optimum out of the TVS set up.
Would be helpful to have all of us who have the TVS on a separate discussion. I guess this does suffice but there aren’t many of us. The information I have found has really been helpful.
Would be helpful to have all of us who have the TVS on a separate discussion. I guess this does suffice but there aren’t many of us. The information I have found has really been helpful.
I dont think most of the owners even post here or anywhere really. Just stick the the tvs900 FB group I guess. Mine is on its way to me now so excited.
