Well, I think i just decided to go 83mm pistons @ 9:1 cr.
Only makes sense since i still have to take the motor in to the machine shop… The build just keeps getting more extensive, or expensive… however you want to look at it.
also probably gonna get some supertech valve springs and rev this pig out to 8k rpms.
still on the fence for doing a full oversized valvetrain. but at this rate it will probably happen, lol.
What are the benefits from running over sized valves?
more flow… go like 1mm over and have the heads reworked.
ferrea makes some 1mm over valves. pretty pricey for a set though.
Ahhh of course…I always thought it was the stem that was 1mm over sized, it just makes sense now.
aaaahhh, I’ve been thinking about nitrous so much that i’m pretty much gonna run it.
it’s too awesome not to.
hahaha, can’t wait. done properly, it could be stupid!
anyone heard about jhm nitrous for b5?
I’ve heard about it being in development, I’m curious to see what the end setup will look like… cause i know what i want to do… If it’s what I have in mind and the price point is there i’m on board.
2.8 heads just showed up today… they are gonna need some loving from the machine shop.
a supercharged RS4 just laid down a pretty strong 11.4 @ 125+ on pump gas. Finally some competition for the B5 lol.
damn, on pump gas too.
yeah 11.42 @ 125 full interior, pump gas, no race, no meth. 98 european octane which is 93 octane over here (they show the number differently…RON vs. RON+MON/2 or something to that effect).
1.88 sixty foot time too. a good 1.75 should get them well into the 11.3 range.
Link? How much stronger (internal abuse tolerance, not power output) is the RS4 engine than the standard S4 4.2?
http://audirevolution.net/forum/index.php?topic=267.0 last page
and the RS4 motor is substantially stronger, all forged rotating assembly and better alloys. The S5 4.2 is also stronger than the mpi 4.2 (all forged), though it has a weaker alloy for the rods iirc.
the big thing is the forged pistons with the 4000 seires Al instead of 2000 (I’m on my phone, cant recall exactly). The mpi 4.2 pistons expand much quicker than the fsi pistons (due to the metallurgy). When audi redesigned the 4.2 for the mpi motors they upped the silicon content (along with switching from a chemically to mechanically al stripped bore lining). This change resulted in the block expanding slower than the older 4.2s.
Since the Alusil blocks have super tight tolerances (piston gap is a hair thickness etc), the expansion rates are very important to ensure a contact free environment. With the mpi 4.2 contact is unfortunately common (explains the scorred cylinders) under normal conditions, then with the added heat of fi the pistons really like to stick to the bore.
The rods arent much better though, they dont like much more than 450wtq it seems (jay’s car w/ spray used to make 500wtq+, that bent 7 of the rods).
sums it up beautifully beem
[family fued] GOOD ANSWER, GOOD ANSWER!
[/family fued]
so that car is officially the fastest pump gas audi sedan? i don’t think there’s a faster trap or ET B5 on pump. That’s pretty cool.
neat thing is we still don’t know the limits of the rs4. That kit is ‘only’ making about 480 whp (on the independant hub dyno someone did it was 480 whp, and on the UK MRC crank dyno it was 600 crank).
Thoughts are the RS4 engine can handle about 550 whp.
2.8 heads are in, moar pics, haven’t done much work on it, i did get the brakes done on my truck though
http://i714.photobucket.com/albums/ww142/judeisnotobscure/IMAG0574.jpg
http://i714.photobucket.com/albums/ww142/judeisnotobscure/IMAG0573.jpg
tell us about your build…I keep thinking you’re talking about customer cars (someone with frankenturbos…someone else with Tial 7s)
What’s your car all about?
I have gotten myself a stock color matched bumper with fogs 
bye bye cactus green rs4 bumper.
Probably gonna run some nitrous as mentioned before.
still gotta pick up some valve springs, i think i have everything else covered.
my car is also 6 spd swapped and rebuilt… jhm video was clutch. (pun intended)