apex_7

I just got my car running and I feel like the numbers are a little low. I put ~100 miles on it before the dyno.

It's a 98 LS1/T-56 w/ 00 heads out of a WS6 T/A and no egr
-ceramic coated 1&7/8" longtubes
-228R on 114lsa w/ PRC dual valve springs/retainers
-magnaflow dual 2.5"-to-3" y-muffler to 3" out (no cats)
-Spec 3+ aluminum clutch w/ aluminum fidanza flywheel
-3" intake w/ rubber and aluminum couplings and a 3" K&N cone filter
-TSP mail order tune
-ported/shimmed LS6 oil pump
-LS2 timing chain

The dyno pulls were made in 4th gear w/ no fan up front. Um... I guess I just expected more power after reading a few threads on these boards. It seems a little lean also (but it smells REALLY rich at idle).

Any suggestions???? Maybe the exhaust is too restrictive?

Slowhawk

iTrader: (12)

Well,by the graph it's obviously not tuned. That is your problem right there.


Needs to be tuned in a bad way.

apex_7

Could you elaborate?

LARRY01Z28

iTrader: (28)

I think its in the tune 14.8 AFR WOW!!!

LARRY01Z28

iTrader: (28)

i would get with TSP and tell them your numbers and your AFR. and then they can work on your tune and re send you a new one.

apex_7

word. Thanks Larry.

corvet786c

iTrader: (6)

it needs a tune man and AFR needs to be around 12.8-13.1

RARON455

iTrader: (35)

Tune is off, and are you still running the LS1 intake, if so you need to pitch it and at least get an LS6.

The Dragon

iTrader: (6)

BOOM lean.

ScreaminRedZ

iTrader: (3)

Is this setup in an fbody?

apex_7

Nah, it's in a rx7.

Slowhawk

iTrader: (12)

It just needs a tune in a bad way.Probly the placement of the Mass air is the cause,but still needs to be tuned to get the most out of it.
Right now the tune is dangerous.

thunderstruck507

iTrader: (18)

you say placement of the MAF, where should or should it not be?

Nitroused383

iTrader: (10)

The maf should not be at the end of your piping next to your filter. You need to have it closer to the engine versus on the end near filter. The airflow readings are to unstable right next to the filter.

Slowhawk

iTrader: (12)

Depends on the car BUT most cars with transplanted motors need a tuner to remap the MAF curve to work with the airflow.MAF placement affects the MAF readings. Not hard to do.

WSsick

iTrader: (13)

cant remember the last time i saw an AFR that large. def follow what slowhawk said, esp since its a transplant

apex_7

I had a K&N cone bolted to the MAF for the dyno pull, so that's definitely a possibility. I called TSP, and they said to check for vacuum leaks around the intake manifold w/ carb cleaner.

I'm installing a wideband soon and borrowing a friend's hptuners, so I'm studying **** on the hptuner boards all this week at work.

Thanks for the replies fellas!

transaman98

iTrader: (16)

i may have missed it but what casting # heads are being used?

apex_7

241 heads

captainstalin`

iTrader: (5)

1 7/8 in a cam only motor?