Possibility to make 500whp without having to do bottom end. b6/b7 s4

You used to be fun!!

I went to do this last night with my Windows 8 platform but my car has been up on blocks so long my passkey expired, I thought I messed something up until I read the instruction notes

I sent JHM an email around 7:00 atlantic time and had a swift response from JHM with my new passkey. I was actually surprised anyone would be there that late, I was more impressed they were willing to handle it right away (thanks JHM)

Now I have to just install that fancy looking new manifold you sent me and I should be happy for a few weeks more.

3 hours behind meant 4pm their time. Still business hours. It’s great when it’s the end of the day. Sucks if you want an answer first thing in the morning and you’re on the east coast.

Ah I thought they were on the east coast! well I guess the time difference saved me haha

I wish they were on the east coast, or atleast opened up a shop over here.

I plan to do the piggies/ tune pretty soon here in the next few weeks as winter is around the corner… but can I get the tune before doing piggies? I assume that if I tune first, and then do piggies no CEL will come on since I did the tune first right? I already have a 2.5" exhaust (Europa parts) so it wouldn’t be bone stock for the tune. I want to get them to do the 94 tune but not ALL gas stations have 94 but I can get it if needed. Would it be better to get the 91 and then fill with 94 sometimes? I know the tune adapts/learns anyways. Please someone correct me if I’m wrong.

As long as your going to do the piggies at some point soon getting the tune first is a good idea. The tune will pull back power if needed to help in any case where the cat might get too hot or if you dont get the chance to put in the 94 octane fuel.

You will love the JHM tune. It really transforms the car

Thanks for the reply! I’ve heard that it’s “better” to get everything done first and then get the tune so it can learn everything. My car is scheduled for the 20th to get the downpipes out but I was thinking I can get the tune from now to then since its 2 weeks away. I’m afraid that if I do tune first with my 2.5 exhaust now and then get piggies I wont notice the piggies or the power overall lol it sounds stupid but I’m pretty skeptical when it comes to this unless I have dynoed before and after or there is a HUGE hp increase. Piggies are good for longevity of the engine anyways right?

When you see tons of JHM supporters its due to the amount of time and support JHM puts into these cars. The tune is one thing that leaps and bounds is beyond every other companys tunes. Either way you cant go wrong. Yes piggies are something that helps with motor life and helps reduce the chance of cylinder wall warpage and scoreing. There is truth to the fact that if you dont reset your ecu it wont get a chance to learn and adapt all the way right away. Over time it can. To reset the ECU all you do is to disconnect the batt and touch the batt terminals together for 45 seconds to disscharge the system.

I believe Jake mentioned this before where its better to go up and try to avoid going down. Meaning if you have 91 tune then it’s perfectly fine to fill up with 91 or higher like 93. Where it’s not such a good idea to get 93 tune and not being able to fill up with and have to use lower octane fuel. You probably would have to take it easy until you burn off that lower octane gasoline. As justinincredible said it’ll pull back on safety. Personally if I wouldn’t be able to fill up with proper fuel all the time then it’s better to get 91 octane tune so you don’t have to think about things like that.

On the topic of making power, has anyone ever thought about getting a JHM stage 1 kit, installing it, but also installing a set of Integrated Engineering 4.2 rods and getting a custom smaller pulley made for the blower from a company like the pulley boys to make in the neighborhood of 500+ whp without going balls to the walls stage 2 600+ whp

Theoretically it’s possible, but it would also probably grenade your BHF shortly after that. Stage 1 is already maxed out at the safest level possible. That’s why any more power than that, it requires a built bottom paired with their hd heads. I personally wouldn’t risk it just for a little more power. Risk to reward ratio is not in your favor.

What do you think would cause it to blow though? The valves?

Here is where all the walls fall down. We have a great motor but only to a point. The JHM kits make about 450whp and are good for a solid 11.x pass very close to what you would see out of the much more potent RS4.

But here is where things fall apart. The issue with our motor isnt actually the rods. Its the pistons. The pistons if pushed too hard will expand at a faster rate then the cylinders. This is one of the major reasons behind doing piggies as it helps remove cylinder heat faster. So the pistons expand too quick and then the get trapped in the cylinder and bam the rods snap at the neck where they are the weakest.

You can just replace the piston but the rods have a serious neck down at the wrist pin and that makes them weak. So its pointless to change the pistons and not the rods or not the rods and not the pistons. You can change both of them but that will also depend on how good your cylinder walls are as if you make too much power you will just push the walls out. Thats why JHM has to go through all the hassle of trying to put in cylinder wall support even with the sleeves

http://audirevolution.net/forum/index.php?topic=2270

This guy did his own built motor with JE pistons and Payter rods. Haven’t seen him post in forever though.

Now what do I do if the JHM tune doesn’t get rid of the CEL? I think I’ve seen one person still have a CEL after piggies and tune but I can’t seem to find that thread again.

What CEL do you have? The JHM tune does not delete the rear O2, so if it’s actually bad you will get a CEL.

Exactly. The JHM tune will help let the car know it should expect extra air flow for no cats but if you have a damaged or bad 02 it will give you a code. To say it differently if you have bad equiptment you will get a code if you just have a free flowing exhaust you wont have an issue

Oh okay thanks, I’m just trying to figure out if it ever happens when I get it done. It will be on the shop taking off my DP and putting them back on if they damage it to get a code?

SO I’m getting my piggies done tomorrow at a shop, whats the time I should expect for the removal of my DP and gutting and install again? Also, what should I expect when I get my car back besides a CEL? Increased power? Or does that only come after a tune?