yep this isn't good. something's gotta be wrong. mods in sig.

 

i dont see an a/f

 

yeah they didnt do one.

 

they look about right

you have very little mods, an unlocked convetor, mac cats, gears, and a flowmaster

 

EXACTLY. 100% correct.

 

Don't look that bad....Just go to the track and get a 12sec time slip and you will feel better!!!!!

 

i'm hoping so. thanx man.

 

why would my friends 02 z28dyno 331hp and 345 tq? he has the same mods i have except he has a 6spd and 3.73's and a slp loudmouth?

 

That's exactly why. Your A4 is eating HP, your gears are eating HP and your flowmaster is eating HP.

 

Well your #'s look okay and may I say 01-02's Ls1's have the advatage of the Ls6 intake.Some people might say that the Flowmaster might be a restriction others may not.

 

He has LS6 parts in his engine. Its an M6. Does he have a 12-bolt also? The 4.11 gears arent helping your dyno numbers either.

 

I agree with the other guys. Take it to the track, don't get hopped up over dyno #'s.

 

beat me to it . and 98 a4's are some of the lowest dyno'ing ls1's to begin with.

 

Here is why:

y pipe w/ kitties, Flowmaster muffler

If you are running the MAC cats and Flowmaster you are seriously choking your power. Pick up an ORY and O2 simms and run a cutout.

Dyno with those changes and I'll bet you'll be up 20RWHP easily through that loose converter.

Also check your wires.

 

yah with my borla and lid and stock converter i only dynoed at 297/306 at the wheels so add an unlocked converter and some headers to the mix and thats about right really...dont be a dyno queen with an automatic youll never win...put on some slicks go to the track and run a mid 12's and buy yourself a beer damnit!

 

Agreed.

I would at least add a cut out.

The HPP3 may be getting you by but a dyno tune would probably wring a little more power out too.

 

nope, stock 10 bolt.

 

thanx man, funny thing about that. i bought about a year ago. tranny went out on it. what can i do but

 

You have two major problems as you stand right now:
1) It appears that you have the stock LS1 intake.
2) It appears that you have the MAC catalytic converters and a Flowmaster muffler. Those are seriously choking your exhaust.

Take a look at your graph and notice that the horsepower curve plateaus at about 5300 rpms. The heads can't breath past that point, most likely due to the intake and exhaust restrictions.
Stock heads, stock cam, high stall converter, 4.11s...plus an SLP MAF and the HPP3. You might consider dropping the last two as they are a hit or miss mod.
A friend of mine with a 98 M6 (lid & catback) dynoed 280.6 rwhp...so you shouldn't feel bad about your numbers. 98s just dyno low.

 

yeah i was thinking about dropping those two things also. maybe i'll do that stuff next month and gut my cats and get it dynoed again just to see what is robbing what. thanx