2002silverz28matt

I changed my setup recently because I am driving the car everyday and needed something more streetable than a th400 with a 5k stall and tbrake(fyi you cant drive those a lot on the street with a brake or the trans breaks, found out the hard way) The motor is the same, its a 383 LS1 about 11.5 CR, TFS 225cc heads, ported FAST 102/102, Ed Curtis 24X,25X cam, t56 magnum spec 3+ clutch, s60 3.54 gear. It has a fairly conservative tune on it right now, prolly could use a cutout also, but overall good numbers. The car is a rocket as long as the rpm is above 3500. Only thing that needs to be done is get a lower set of gears when I can save up some money. The tune is great,runs smooth and when I start it cold in the morning it idles fine although the neighbors may disagree.

446 hp
424 tq

graph
http://i752.photobucket.com/albums/x...4/DSCN1013.jpg

ls1curt

iTrader: (31)

I would have expected more. What did it do through the th400? Why do you say a brake kills a th400 on the street?

2002silverz28matt

it only made 400 through the th, with a transbrake there is a constant line pressure so you cant drive it thousands of miles or the transmission fails, like mine did. I am not an expert, thats what the expert said was the reason for the trans taking a ****. It was brand new with like 8000 miles on it

2002silverz28matt

does this seem low to anyone else?

427LS7HCI

YES! I was expecting to see at least 490-500rwhp/450-460rwtq

2002silverz28matt

the rings are gapped for n20, would that make any difference? prolly not 50 hp

ls1curt

iTrader: (31)

my old setup with a 11.6:1 383 w/ prc 5.3 heads and a ms4 put 460whp on a mustang dyno through 12 bolt/slicks so i would think you should be around 475+ with those heads/cam.

reeperz28

iTrader: (1)

Try out a different cam when you get gears . There definitely is some power left on the table

RARON455

iTrader: (35)

Are you on a mustang Dyno? Would figure you would make more,, You have better heads then mine does, But my cam is optimized for my heads. I gapped my rings for the spray also top rings at .022 bottom at .024 wiseco pistons and their nitrous rings.

2002silverz28matt

I think it is in the tune. It was on a Dynojet. If its not in the tune then I have no idea

T.Man

How does the car run down the track?

DSRE

iTrader: (7)

not bad through a dana 60, i'd run more compression with that much cam personally, You have a restriction some where either on the intake side or exhaust imo
When You Use your trans brake it applies first and reverse to keep the car from moving, if its not setup right you can burn stuff up pretty easy, especially if reverse is trying to be applied while you driving

2002silverz28matt

havent taken it to the track since gateway in STL closed. I never used the transbrake, didnt even push the button, there is a constant line pressure or something and you cant really drive them much at all. The transmission shop said shifting on the way to work was just as hard as taking it down the strip which i never did once on that transmission

T.Man

What kind of exhaust are you running?

2002silverz28matt

1 7/8 American racing headers no cats 3 inch to magnaflow

stumprrp

iTrader: (2)

You should gain about 30 RWTQ and 30 RWHP bypassing the single 3 inch magnaflow with some dual cutouts. My 396 LT1 gained around 30tq 25 hp through the entire curve opening up the cutouts bypassing my edlebrock catback.

2002silverz28matt

My mechanic also said the exhaust is holding it back, which I am sure it is, I just didnt think it would hold me back much, but i could be wrong

Those are crazy gains from a cutout! Hope I can reproduce those results.

csilvers1984

iTrader: (5)

My c5z with 384- tfs stock 215s,ported 90,LG G5xx cam made 484 through a 6spd........sd tuned. I would've expected to see 475 at least..