here is a direct bolt on kit that can be used on a stock engine
cost is $3300 shipped anywhere in the world. I have developed many upgraded parts for this kit to produce well over 300whp!
I built the very first TVS900 over 5yrs ago now!. With our numerous kits we sold caused Harrop to go ahead and make their bolt on kit for the masses as our kits were race versions with FMIC.

watch the video to get an idea of the quality and RELIABILITY of the kits.

safe secure packaging

capable of over 300whp
70mm pulley is standard


Great manual for easy install
electric water pump, no more issues with PTO gears going out
No more leaks in the intake system like the factory

 

I am impressed!
It really shows how much engineering that is put into making this package!

 

I re-designed the belt tensioner to put it back into the original angle that the factory had. Works perfect now with no belt slip RMW Billet tensioner for Harrop TVS900 kit

 

There Jan goes again making me drool . . . . .

 

I have a front mount intercooler kit coming for the base TVS900 kit. Will allow you to make up to 350whp

 

What is to be expected out of a stock setup, or a bolt on setup (intake, header, exhaust)?

 

Hmm, looken like nice stuff.

Mike

 

all depends on pulley size and your tuning
20-40whp

 

Do you have any Dyno charts showing the power to the wheels on a stock s, and then also one with bolt on mods? Also, how many of these kits have you sold? What kind of reliability testing has been done on this setup? Any daily drivers out there running this where they have tens of thousands of miles on the aystem. How much boost does the setup make?

Also, if the basic kit is only adding 20-40hp....how much extra in assessories/mods does it cost to get the 300/350hp to the wheels type system?

I'm very interested.....but I would like some more details.

Thanks!!

 

Hey Jan,

Does it fit automatic R53s?

 

I don't think any of the kits out there fit the automatic without modifications to the intake tube as the Auto is different

 

 

not worth going through the fabrication work for 1
you can get me 10 people that want them and we have a deal

 

 

I think it would be cheaper for you to have one made locally
the jig would cost more than that for me to do it, let alone the fabrication hours
this is exactly why I am telling you find 10 people to amortize the costs

I don't think people understand the costs involved in making low quantity parts for these cars. It's very time consuming and high cost which gets passed on to the customers

 

 

 

When the Harrop TVS900 was first introduced a lot of people said it would have heat soak issues. Can you please provide some insight/debunk this theory?

Drew

 

not sure who told you that about heat soak, because your intercooler is on top of the engine, heat rises........I think you get the point

does it run cooler than the M45 or sprintex at same boost pressures? YES..........will it not heat soak on a TMIC? NO
Hope that helps
We do have a FMIC version for it that will not heat soak

 

As succinct as one can make it. The keyword is TM .

 

Have you completed the FMIC? I’m looking in your store but haven’t seen it.

 

Still love to see an answer to this Jan @Revolution Motor Works

 

I too would like to see hard number and proof of said gains.. not one car v another on the dyno when they got different setups and superchargers.. I wanna know what it actually gains , just swapping from stock sc to the tvs.. I hear claims it outperforms sprintex but how can that be when sprintex rotor design is a more advanced rotor design. Roots v twin screw......
heres the thing guys.. im HOPING to have a tvs kit very soon..
I will be able to give you 1st hand , personal on road feedback about whats what..
and honestly so far , I haven't seen a mini with a tvs in person outperforming my sprintex but again though , my car always had more indepth mods so it wasnt an even comparison.
If i get the tvs , i will run it on its smallest possible pulley just like i did the sprintex (60mm) and the stock sc ( 19% , my cars manual . The 20% is for autos) and to be 100% honest with you , a stock PORTED supercharger WITH a 19% pulley is a very very good performance setup. It doesn't make much less power or boost than my sprintex... dollar to dollar , id absolutely run a ported sc with 19% ANYDAY. Only reason I still run my sprintex is because it DOES make that little bit more power SO with my build as in depth as it is , I'm chasing every hp I can get at this point. But for a car on stock head n cam , I'd absolutely rather go ported sc route ( I port the sc inlet and horns ).
so if I get this tvs kit I will be swapping out my sprintex and trying the tvs to see which ACTUALLY makes more power and how much cooler the tvs runs v the sprintex and stock sc ( I can't imagine it running cooler than stock , maybe equal but cooler , I can't believe that )..
If you want more power , less heat soak and all around betterness. YOU WANNA GO TURBO !
These new age turbos have so little lag now and the boost you can get from even a tiny turbo now is unreal.. superchargers have been surpassed by turbos now in every way EXCEPT for that beautiful BEAUTIFUL supercharger scream !
I'd also LOVE to see a 350whp with running a front mount..lol the front mount robs 30hp ALONE with all the extra piping, bends , too large of intercooler and boost drop then caused by that all. And it CANT be on nitrous either..
again , lets see JUST an intercooler swap on a car with a grs motorsport topmount ic or even a stock ic and then run a fromt mount.. same car , no other changes what so ever.. i GUARANTEE the front mount WILL loose power all through the rpm band.. if im wrong , please show me proof with munbers.. it just is impossible to gain power with adding so much extra restrictions.
again , I've personally tested atleast 7x different brand and style intercoolers too to know what's best. And STOCK GP or just STOCK is BEST. EVEN UPTO 20PSI ! unless you get a grs motorsport OR the grs charge cooler ( only ic IVE EVER TESTED that ACTUALLY allows more boost than stock AND run cooler iat still )..

 

The best part of this kit for me wouldn't even be the power and torque gain; look at the photos - other than the bubble wrap, no plastic anywhere. Imagine having an aluminum blower inlet pipe that wouldn't crack as you were trying to reinstall it.

 

4000$ imo doesn't justify a metal boost tube.
there is an aftermarket option for the boost tube and I can't say for certain but i have heard it isn't as easy to break as the stock one is ( though I never personally broken a boost tube unless I didn't care and was just yanking stuff out )..and I don't have personal 1st hand experience yet with that aftermarket boost tube.
sprintex too have an aluminum boost tube.. the tvs kit DOES look better as its tensioner is better and it uses s better waterpump. Buuuut gpr did make a better tensioner for the sprintex that helps MASSIVELY to eliminate belt slip and use of oem belt tool. Thank GOD I bought it when I did because it was the last one I seen for sale since..
but to the claim that that sc makes 300hp and 350hp with a front mount is crazy. I can't for see a stock engine with just a tvs or sprintex upgrade ALONE making more than 200whp. Yea they add decent power but that extra power only happens once you have supporting mods : injectors , fuelpump , tune , better intake system and exhaust.. then the stock head and cam is a big limiting factor...
I just don't like the outlandish claims..
lol when I sell my ported intake , horns supercharger i could too claim it being a 300hp package , I guarantee you can make 300hp on my ported stuff BUT the real question is , what and how much else along WITH it will it take to reach 300hp ?