What's up just wanted to find from a few of you guys it there is anything I need to add to my car to put down 400 whp. I have a good amount don't what ealse do I need to do.

 

a4 or m6, what rearend, cam, who ported the heads, any current dyno/track numbers, stock shortblock? these ???s need to be answered before anyone is going to give you any guesses. you might be pretty close as it is now

 

I don't know what a4 or m6 but it has stock rearend and stock pistons a shop in Tampa ported the heads.

 

I ran a 12.1 at 116 and like a 7.80 1/8 but stock gearsin the car I am going to put a 100 shot in soon

 

Heads / Cam combos will get you to (or above) the 400 mark.
A set of long-tube headers and a proper tune will help a lot.

How big is the cam you are running and who ported the heads?

Electric waterpump, throttle-body coolant bypass and an aluminum driveshaft will help as well.

 

I was told I don't have to tune it,but you think I should? I have stock driveshaft but I have all the other stuff but the tune. What is a throttle body coolant bypass? I need to know more about this stuff so I get max performance.

 

I don't know the size cam but I know it a veete racing cam from crain. And it has 1.6 roller rockers in it. That's what they said it calls for to run best

 

A mailorder tune at the very least. Heads/Cam is a significant change.

Ls1 shafts are aluminum and bolt right in place of an LT1 steel "vibeshaft"

Stock, the LT1 runs warm coolant though the TB to warm it up in cold weather.
You can disconnect those lines from the TB and connect them together to keep it from heating up incomming air.
It's worth a few hp and doesn't cost more than $5 to do (2 hose clamps and a 3/8" male/male connector.

 

Oh ok I will have to do that then. I just want it to put down 400.

 

get it dynod, you could be very close as is.

 

A4 and M6 just means what kind of transmission you have. A4 = automatic(4 gears) and M6 = manual (6 gears)