02SSZ7D

-right now i got a "218/224-112-560/574"
-car makes 385 rwhp & 365 rwtq
ideally, shouldn't the torq # be higher than the hp# ?
-last week ran a new best of 11.72 @ 115.87 w/ 1.62 60'
almost always get a new best everytime i go to the track
-not a daily driver, got a stock '02 Z28 for that
-mileage:
12,000

-induction:
slp cold air duct
k&n filter
tsp lid
slp maf
smooth bellows
tpis 100/90 mm throttlebody
ported LS6 intake

-exhaust:
tpis long tube headers
y-pipe, hi-flo cats, slp loudmouth SOON to be replaced w/ duals & X-pipe

-transmission:
built A4, stock rear (for now) w/ 373's
transgo shiftkit
tci 3000+ streetfighter torq converter

-engine:
218/224-112-560/574 cam from tpis
tpis LS6 stage II ported heads
asp underdrive crank pulley & overdrive alt pulley
160* thermostat
beru plugs & taylor wires

-chassis & suspension:
slp shock tower brace
bmr weld in sub frames
bmr chro/moly lower control arms
bmr chro/moly pan hard bar
QA1/HAL 12 way adjustible shocks & front springs
wolferacecraft 6-point chro/moly roll bar

- rims & tires:
bogart D-10's, 15 x 10 rears & 15 x 4 fronts
bfg comp t/a 275/50/15 dr's

-pcm tuning:
LS1 edit

-this is a smaller than average cam (not what i wanted), cars making ok power and respectible times at the track for a heavy *** convertible, i need help and suggestions on a new cam without going crazy big!

-any help &/or opinions will be appreciated! thanks

jrp

iTrader: (16)

you could always stuff a Trex up its *** . i'd look into the FM13 though.

02SSZ7D

whats the FM13?

ss rally red

iTrader: (8)

Check out Futral Motorsports >>>>>>>>>>>>>>

02SSZ7D

basically i'm looking for a cam that makes "plenty" of power! one that would be a "noticable" difference over the 218/224-112 that i got now, i need all the help i can get to power this heavy vert down the track!

Deeavi

iTrader: (16)

I believe your throttle body is too big for your combination. You are probably loosing some torque with that setup. I will bet if you put an 80mm or a ported TB on you would gain 20ft lbs of torque.

If you are gonna run that setup you DO need a bigger cam! Something around 230 duration @ .050" will probably pay off for you.

02SSZ7D

thanks Deeavi for replying, (first, FYI, i'm new to this hobby) but am interested in what the more experienced people have to say....i'm curious why that tb may be too big for my set up? when everybody and their brother are talking about the new bigger TB's? what might i want to do to make that TB earn its keep? it was expensive back then and they had to port the intake to accept the bigger oval shape of it.
and could you suggest a paticular cam so i could do some research (surfing)? thanks again

jrp

iTrader: (16)

FM13 gomer is making 475rwhp 42xrwtq and josh is making 455rwhp with a similar sized cam. also the FM10 and FM11 are putting out great numbers. they produce killer power under the curve. or you can go with the TSP231, g5x2, Tr230, ect. though your TC might be a bit too small for those cams.

Proud2bSS

iTrader: (2)

The bigger TB's disease is somewhat similar to the bigger carb disease. Inexperienced people think that bigger is always better. IE, they put a huge cam on a stock manifold/head car. The engine can only handle so much air/fuel flow, and that restriction is based upon intake, valve sizes, head dynamics (porting, chamber size, etc), cam specs (lift, durations, lsa, etc), and the exhaust system. If the engine can't move the air, placing a carb/TB bigger than the engine can demand accomplishes nothing. Too big, and it can actually hurt engine air flow. Seen it a gazillion times on carburated cars, where someone puts a huge carb (looks cool) on a hyperventilating engine, stomp on the gas and blllloooooogggggggg....engine bogs big time.

I don't know exactly how the engine reacts to a too large TB. Maybe someone in the know will chime in.

But in this case, your current cam is your bottleneck to better times. I think yor motor's potential is seriously underfed right now.

02SSZ7D

cool, thanks....can always get a bigger tq/c

02SSZ7D

i agree, thanks, thats why i'm trying to feed it a bigger cam!! for starters!

Larry

iTrader: (4)

I would be willing to bet your torque converter is too tight for that cam. You need a 4000 rpm stall if your peak torque is aroun 4500 rpm. 1.62 60' is a little high for what you have. I ran a 1.496 with my 218/218, .528 lift cam.

Camaroholic

iTrader: (1)

In regards to the throttle body vs carb comparison.

It doesn't work on these cars.

Carb relies on air velocity to keep fuel atomized. Lose velocity and you'll get the bog. The manifold is "wet".

Port fuel injection (what the LS1 has) atomizes the fuel via the injectors. The manifold is "dry".

To determine if you need to go bigger on the intake tract, watch the MAP sensor during WOT. If you see the engine pulling vacuum, you're not feeding it enough air. If you stay near atmospheric with the MAP, the engine is using as much air as it can.

I have a BBK twin-58mm throttle body and ported intake manifold on my 4.3L-equipped 94Z. Yeah, overkill. It's a bolt on left over from my heads and cam motor that decided to go boom. Watching the MAP, I don't see much of a pressure drop at WOT on the MAP sensor. But the car runs just fine. Plenty of pep. It's not fast, by any means, because it's a stock iron headed 4.3L motor. IMO, if you've already got the throttle body, leave it. I don't think it's hurting anything, especially if you're looking for good ET's out of the car.

Deeavi

iTrader: (16)

If you are getting a bigger cam and torque converter you should see the improvement you are looking for. Should really respond well considering what you already have.

02SSZ7D

thanks guy, this is some real good info! heres my latest dyno sheet from a while back but shouldn't have changed any since i've only added suspension mods and drag rims, thanks again, this is good stuff!

02SSZ7D

larry, just out of curiosity, how'd ya know i was making peak torq at or around 4500 rpm? even before i posted my dyno sheet? um, silly question? (experience probably, something i need to aquire!)

Deeavi

iTrader: (16)

Here are some from Speed, Inc.

98-02 LS1 CC-custom6 Lift: .595/.595 Dur@.050: 231/231 LSA: 112

98-02 LS1 CC-custom7 Lift: .589/.595 Dur@.050: 231/237 LSA: 112

Here are some from Futral:

FM-F11-112 Futral Motorsports Custom Grind Camshaft - 228"/230" .581"/.591" 112LSA aggressive profile with a 2200-6600 RPM range, fair idle
FM-F11-114 Futral Motorsports Custom Grind Camshaft - 228"/230" .581"/.591" 114LSA aggressive profile with a 2200-6600 RPM range, fair idle
FM-F12-112 Futral Motorsports Custom Grind Camshaft - 230"/230" .591"/.591" 112LSA aggressive profile with a 2500-6800 RPM range, rough idle
FM-F12-114 Futral Motorsports Custom Grind Camshaft - 230"/230" .591"/.591" 114LSA aggressive profile with a 2500-6800 RPM range, rough idle
FM-F13-112 Futral Motorsports Custom Grind Camshaft - 230"/232" .591"/.585" 112LSA aggressive profile with a 2500-6800 RPM range, rough idle
FM-F13-114 Futral Motorsports Custom Grind Camshaft - 230"/232" .591"/.585" 114LSA aggressive profile with a 2500-6800 RPM range, rough idle

Give them a call!

Larry

iTrader: (4)

I was just guessing based on your cam specs although I didn't know what advance was ground into the cam nor if you had advanced it with an adjustible timing chain. I assumed about +4 degrees advance.

You definitely need a looser converter!

02SSZ7D

i like the sounds of that speed inc 231/237 (?), thanks for all the work!

02SSZ7D

i have no idea what advance (?) but i'll grab the cam spec sheet if i go to work today and i originally had a tci saturday night special 2400 (at the shops recomendations) and when they insatalled the h/c pkg (cam at their recommendations) we upgraded to a tci street fighter 3000+ (at their recomendations)

here she is trying to earn her keep!