Originally Posted by jason 98 ta

lots of responses in this thread without carefully reading the posters mods & specs. This car is a a4 car. While i've seen 470rwhp a4 cars before it's not a easy task & not feasible for a street pump gas setup.

The tfs heads or the prc 215 heads are really hands down your best bet for making anywhere near the power goals your looking at. I can tell you that for a fact. The afr heads are nice, but they're nowhere near the power output your trying to get to. I sell all three sets of heads everyday & i can tell you i've personally installed all 3 next to each other on a engine dyno back to back. The tfs & prc 215 heads are both a healthy bit more hp over the afr cylinder heads.

The advantage the prc head has over the others is the smaller chambers without running into p/v clearance. We can ship you a 59cc head that will clear even the larger camshafts while the competitors cylinder heads will run out of p/v clearance somewhere in the 62cc chamber area...

We're also testing a brand new bigger runner ls1 cylinder head for stock bores. You'll still be able to get smaller chambers, but the slightly larger valve will give you less p/v clearance similar to what the tfs head ships with.





This was a m6 car. Not a a4 car.

For max effort camshaft i'll put the ms4 camshaft against any competitors max effort camshaft. The across the board power output the ms4 offers has been engine dyno tested time & time again to be the best all out camshaft available for clearing stock pistons...

Originally Posted by TransAmcoupe98

Yes of course if you go with a bigger runner you are going to make more power. It depends on what the goals are for the car, does he daily drive it or does he just want a track car. The bigger the runner, the less LOW END power you will generate unless you bump up compression more and throw in a gear. Gas mileage is sacrificed much more in the mid-upper RPM's, but I am a street friendly set-up guy and thats where my thoughts are. Just my .02

Originally Posted by PREDATOR-Z

470rwhp on a stock block with A4 is achievable and not impossible; nor does it require the biggest cam out there.
But it will require some well thought out combination of parts and some huge amount of building time, attention to detail and hours of tuning by a real guru.

The one thing that always ammazes me is that most poeple are so infatuated with peak Hp number output, instead of thinking "I would like a combination that makes the best average power between shifts to get me moving".

And before anyone recommends anything the main question to be answered first should be "What is your budget?"

The most efficient way of reaching these high Hp numbers are FI, either Supercharging or Turbo.
The most fun on the street is definitely a Magnuson. More trq that you can shake a stick at by 2500 rpm, 6300 rpm spin limit, very streetable, looks good, sounds stellar at boost, very efficient, good gas mileage etc.. all in all... Class act.
And when the dawgs while bragging about their cams and crying from exhaust fumes come along and ask you "what are you running under dat hood bro?" nothing beats that look of respect when all you utter is "7psi ".

Originally Posted by Intercooler2

Where does the 470 number come from? Are you trying to beat someones numbers?

Races are won at the track not on a dyno so I would concentrate on what you are trying to do.

Originally Posted by SLOC5LS6

In all honesty, I've seen track numbers from AFR and TSP stg 1 and 2.5 LS6 heads. I have yet to this day to see any track slips from any TFS 215 headed cars. I see a slew of dyno numbers, but not any track times.

Originally Posted by silverLSWON

i would go with TEA ported heads or TFS heads. tea is the best ported gm casting head out there IMO.

Originally Posted by allngn_c5

That's not entirely true unless you go so big on the runner that you step into hog heaven, as in hogged out runners. Cnc'd 205 to cnc'd 215 is not enough to even begin to give loss of bottom end a second thought. TFS 215's have been done on numerous 346 cars and all maintain a very strong bottom end.

Originally Posted by ska4life07

I'm rockin' the LS6 heads with a TSP MS4 cam. That equals a mean machine. The heads arent the greatest, but I didn't want to over-do it and TSP has awesome deals.

Originally Posted by TransAmcoupe98

Check out AFR's link below with their 224/228 cam and their street 205 heads on an LS1 block with LS6 intake. The numbers are unbelievable. You don't need a big *** cam that requires 4.56 gears to move it.
http://www.airflowresearch.com/ls1_dyno.php