B6 S4 B7 S4 and RS4 built motors from JHM

B6/7 S4/RS4
#1

With the B6 S4 hitting its 10th birthday and the countless posts on motor issues, failures, scored cylinder walls, warped blocks and just plain high mileage. It’s good to know there is an option. If you have been in the B6 or B7 S4 world, you know the complexity of these motors and that you can’t rebuild them like a standard motor.

If the 4.2 S4 blocks being aluminum wasn’t a big enough issue, the paper thin walls are. Much unlike a standard motor, you can’t just bore the cylinders as there isn’t enough wall thickness and if that wasn’t enough the walls are aluminum, they require a much different hone process then standard blocks.

Here is the good news. I thought I would post a few pictures of what you can do about it. JHM has a solution.

http://jhmotorsports.com/RandD/B6S4/sleeved_motors/JHM_Sleeved_B6-B7_S4_Short_Block-Closeup.jpg

http://jhmotorsports.com/RandD/B6S4/sleeved_motors/JHM_Sleeved_B6-B7_S4_Block_Top.jpg

http://jhmotorsports.com/RandD/B6S4/sleeved_motors/JHM_Sleeved_B6-B7_S4_Block_Bottom.jpg

#2

Awesome stuff count. Love to see it! Amazing how far JHM has taken the platform and continues to take it.

#3

Before

http://audirevolution.net/addons/albums/images/984997505.jpg

After JHM

http://jhmotorsports.com/RandD/B6S4/sleeved_motors/JHM_Sleeved_B6-B7_S4_Short_Block.jpg

#4

There are several parts of the motor that need help. The next step was the heads.

http://jhmotorsports.com/shop/catalog/images/B6-B7-S4_JHM_rebuilt_heads_upg_valves.jpg

http://jhmotorsports.com/shop/catalog/images/JHM_head_rebuild/B6-B7-S4_JHM_valves_springs_exh_CLOSE.jpg

http://jhmotorsports.com/shop/catalog/images/JHM_head_rebuild/B6-B7-S4_JHM_valves_JHM_engr_w_logo.jpg

Here is what can happen with too many miles on stock heads without checking in on them.

http://jhmotorsports.com//products/pictures/JHM-Cylinder-Head-Rebuilt/B6-B7-S4-42L-V8-Valvetrain-Failure.jpg

#5

Really cool to see. Saw a few in person a few weeks ago. Definitely confidence inspiring. Made me want to buy a blown motor b7 s4 avant and get this done.

Car $7500
Build $15,000 (guess)
Sc2 $12,000
Headers and cat back $4000
5r clutch and few $2000

$40,000 and you get 550-??? WHP

Or just get a motor build done, shove it in the car with headers and cat back and go all motor without a fear in the world of your engine crumbling. It becomes a bulletproof B67.

#6

It does create a new level for the B6 and B7 S4s’ now.

The B6 and B7 were definitely way behind the RS4 motors. Now you can jump way past what the RS4 motor can handle and get into a real solid motor, with no concerns of damaged cylinder walls, burning oil or warped blocks.

JHM has a serious process when it comes to building these motors.

They do it right. Like with this.

A deck plate to fix any warped blocks.

http://farm5.static.flickr.com/4076/5444256232_e6cc2c5339.jpg

http://farm6.static.flickr.com/5216/5397845764_401d7447ec.jpg

http://farm7.static.flickr.com/6004/5994356763_609ea67740_z.jpg

#7

Fuckin A :o

#8

So BA! I’m eagerly following allowing with this!! :o

#9

Thanks for the post CV ;D

Feel free to email me or give us a call if you have any questions! We have 1 block sleeved and ready to go (just waiting final assembly of the custom rods/pistons and the crank etc…).

Perfect opportunity to be one of the first to get a proven built engine by JHM! Once this block is spoken for, lead times will kick in, so act fast if this is something you are looking to do!

Jake

#10

makes me want to go get my nogaro S4 back!

#11

Would love a fully built for my RS4

#12

Great post, great info, very interesting to see. Thanks!

#13

Thanks CV, the motor looks so good I felt my eyes tear up…lol

#14

Good stuff CV, I’ve been drooling over these pictures for the last few months on my phone. Any info on what the redline will be with the fully built bottom and top end?

#15

Excellent stuff! I can’t even imagine the research that went into this. 3,4,5? Years in the making?

#16

I may consider it in 2015. Built motor, stage 2, headers and taller 6th. Unfortunatly, I have other financial obligations in 2014. Will be a long wait…

#17

So I’m curious if a slushbox can handle stage 2-3?

#18

And the invrstment…this product development alone has probably cost as much or more than all the other companies’ B67 R&D budgets COMBINED.

#19

Am I the only one that thinking about the potential of…

JHM Built Motor
+
JHM Nitrous Kit

??? ??? ???

I think a progressive 200-300 HP shot would potentially hang pretty well against the SC cars for about 1/3 the cost. Jake… any thoughts?

#20

The concerns after doing the stage II with the built motor move to the transmission, differentials, and axles.

The axles should be fairly easy to resolve, if not cheap, by sourcing something from the Driveshaft Shop. Custom or off the shelf, they can take care of it.

JHM has tried to address the differential, at least with the rear, so hopefully this will solve the problem before it becomes one. There is always the rest of the innards and the housing itself to worry about, along with the front and center diff.

The tranny could be and probably is the weakest point but I can’t say for sure. If history is any guide and from many of my own personal experiences, anytime you double the power from an engine in a production car with a stock drivetrain, the tranny does not hold up very long.