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Discussion Starter · #8 ·
well what i found out and also talking to a shop here in orlando that builds bmw and audi's they said unless u go super charger building an all motor s4 wont net u much. No one make a stroker kit for the s4. All motor will cost to much. And u would have to have custom pistons maid becuz none are pre-maid. 034 motorsports has a set of rods but that about it. The heads can be built and will net u gains about 60-70whp and that about it. And that will cost about 4-5k.

So anyone that wants 400-500awhp s4 to supercharger with meth.

Anyone wanting 500-700awhp s4 do fully built heads and throw some rods in and get the charger kit with some meth or supporting mods :thumbup:
 

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Well, first determine how much horsepower to the ground you can handle in an AWD car.

300 to the wheels is fast and newbs to the awd car will be giggling school girls for years with that much power

400 to the wheels requires FI and is ridiculous amount of acceleration and power. JHM is not even close to that on their all motor cars and they are running 12.70 at 111

If you are one of those that says "yea but its so much easier to get 400+awhp in an EVO or STI so I'm gonna get that" well..you haven't really considered a b6/7 S4 for what it was meant to be.
This not a "insertawdturbocarhere". This is a luxury car that has respectable hp. Is fast enough stock for most of the original buyers and running 12 sec 1/4's is all you will ever need if you have all the boltons and a JHM tune.

Most people and enthusiast can't handle more than 300awhp anyway. This is nothing like your fwd or rwd cars.
 

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I have the JHM stage 1 supercharger (approx. 400 awhp). JHM is about 9-12 months away from stage 2 and 3 which will require an engine rebuild with stronger internals (which they're putting together for their stage 2 and 3 kits). So I might get back to you in a year's time lol.
 

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Discussion Starter · #14 ·
Well, first determine how much horsepower to the ground you can handle in an AWD car.

300 to the wheels is fast and newbs to the awd car will be giggling school girls for years with that much power

400 to the wheels requires FI and is ridiculous amount of acceleration and power. JHM is not even close to that on their all motor cars and they are running 12.70 at 111

If you are one of those that says "yea but its so much easier to get 400+awhp in an EVO or STI so I'm gonna get that" well..you haven't really considered a b6/7 S4 for what it was meant to be.
This not a "insertawdturbocarhere". This is a luxury car that has respectable hp. Is fast enough stock for most of the original buyers and running 12 sec 1/4's is all you will ever need if you have all the boltons and a JHM tune.

Most people and enthusiast can't handle more than 300awhp anyway. This is nothing like your fwd or rwd cars.


To be honest i think jhm has done a awesome job on providing bolt on parts that can bring the NA s4 to life. But sure some will agree that the s4 for the money spent is greatly under powered. Most would be happy if the s4 came stock making 300awhp. Running mid 12 in the 1/4 from a 4.2 v8 isn't all that great. Just saying! the thing is the 4.2 v8 is a strong motor and can handle 400awhp stock untouched so why did audi under power it.

If anyone is interested take a look at mrc tuning out in the UK and u will see what a NA 4.2 v8 can do when u really puched with some really good mods. And there supercharge s4 and sr4 are make 500-600+awhp. Check it out!
 

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To be honest i think jhm has done a awesome job on providing bolt on parts that can bring the NA s4 to life. But sure some will agree that the s4 for the money spent is greatly under powered. Most would be happy if the s4 came stock making 300awhp. Running mid 12 in the 1/4 from a 4.2 v8 isn't all that great. Just saying! the thing is the 4.2 v8 is a strong motor and can handle 400awhp stock untouched so why did audi under power it.
Seriously? Every auto manufacturer "underpowers" their motors. It's a safety margin. The RS4 4.2 can handle even more power than the S4 4.2 with stock internals, etc. It's the same with American and Asian cars. All have a safety margin.

If anyone is interested take a look at mrc tuning out in the UK and u will see what a NA 4.2 v8 can do when u really puched with some really good mods. And there supercharge s4 and sr4 are make 500-600+awhp. Check it out!
Yeah, but they won't go to the dragstrip which is 30 miles down the road for them. They prefer to have "dyno days" where everyone jumps on the dyno and pats themselves on the back. I call bs on all that dyno crap until you show me proper real world gains.
They use a TTS Rotrex centrifugal supercharger (at least for the RS4).
I'll totally admit they have nice dyno numbers but until they take their cars to their neighborhood IHRA strip, it doesn't mean much to me. We've seen PES and VF put down some decent dyno numbers only to be obliterated on the track.

As for JHM, the supercharger they picked is good for 800 crank hp (630-650 awhp) so within the same ballpark (hopefully available early next year).
 

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Discussion Starter · #16 ·
:thumbup:

yea as of now my money is on jhm, they have proven to make good gains over most of the other company's. And im sure they will come out with a killer real world power supercharger kit.
 

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:thumbup:

yea as of now my money is on jhm, they have proven to make good gains over most of the other company's. And im sure they will come out with a killer real world power supercharger kit.
Yeah, JHM has a few things going for them. 1) They test the **** out of their products. This is why they're always last to market. Over 2 years of planning, designing, in-house testing (to the point where they deliberately blew up an S4 4.2 to see how far they could take it) and then beta-testing for their supercharger kit. 2) They stand behind their product. If you have concerns/issues, they'll take care of you. 3) Knowledgeable folks.

Their customer service might be hit and miss cause they're small with very little staffing and they may take a while to get back to people sometimes but they're honest and do their due diligence which is what's important to me personally. I may have to wait a few days to hear back from them but that's a small price to pay for quality products.

I can't speak for the rest of them but I have read too many threads of VF and PES screwing customers over (such as a blown engine due to bad supercharger tunes from lack of testing and skill and then leaving the customer hanging with the cost).

Edit: Oh and I forgot to mention whenever JHM comes out with a performance mod, they actually go to the 1/4 mile track and publish videos and time slips to prove their product works.
 

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Discussion Starter · #18 ·
Yea man i watch pretty much all there vids for there stuff. See that most of the s4 guys are going with jhm says alot. And from what ive seen pretty much everyone is maken more power with jhm products. :thumbup:
 

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im excited to see how good there products are. im buying the manifold and the tune this weekend actually.
The tune will completely change your car although it really shines with a proper 2.5" catless downpipe/catback setup. You'll notice the throttle is way more sensitive. Just give it a week or two for your brain and feet to adjust. :)

The manifold looks sweet (which color did you end up going with?) and it's a nice piece of the puzzle.

I just did a 3rd gear pull last night and managed a peak 878 rpm/sec with an average 780 rpm/sec and an 800 rpm/sec median.
Also calculated my FATS time at 2.812 seconds (FATS time is a B5 S4/RS4 measure which is the time it takes to go from 4200 rpms to 6500 rpms in 3rd gear)
 
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