99ekb18b

what do you guys think about my dyno numbers? they seem kind of low to me...any input is welcome.

my setup:
stock ls
short tubular mani
garrett t3 60/48 from ford merkur
38mm tial wastegate with mbc
dumptube to the floor
2.5 downpipe with 3" cutout
dsm 450
walbro 255
2.25 cold side and 2" hot side charge pipes.
8" jrc

spike up to 11psi at 4500rpm then drops back to 8 or 9psi till redline
do you guys think i have a boost leak?

190whp 191 tq

blue lines were my basemap run at 8psi

EK k kay

Excellent torque numbers

SOHC_MShue

damn looks just like my friend's dyno when we dynoed without a dumptube. After holding a pipe up on the end of the wastegate during a pull it gained 40whp

99ekb18b

does the power seem right?

urbansi

Seems pretty low, but there are a lot of things that could be to blame.

Is this a street tune???

SOHC_MShue

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99ekb18b &raquo;</TD></TR><TR><TD CLASS="quote">does the power seem right?</TD></TR></TABLE>
no. The torque curve dies bad up top.

99ekb18b

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by urbansi &raquo;</TD></TR><TR><TD CLASS="quote">Seems pretty low, but there are a lot of things that could be to blame.

Is this a street tune???</TD></TR></TABLE>

no it was dyno tuned...and yea i dunno why my torque curve dies so bad...

nerdsports

What was used to tune the setup?

Remember that the turbo he used is rather small for this motor. He said it spiked 11psi @ 4500rpms... Thats where his peak torque number is.

I would recommend getting a bigger turbo on there. The small turbo is spinning up realllly fast, then starts to die out (torque numbers).

adseguy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99ekb18b &raquo;</TD></TR><TR><TD CLASS="quote">

no it was dyno tuned...and yea i dunno why my torque curve dies so bad...</TD></TR></TABLE>

Because of improper tuning. The basemap almost looks better then the tune if it wasn't detonating or fluctuating boost.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nerdsports &raquo;</TD></TR><TR><TD CLASS="quote">
Remember that the turbo he used is rather small for this motor. He said it spiked 11psi @ 4500rpms... Thats where his peak torque number is.

</TD></TR></TABLE>

That turbo isn't that small and shouldn't do that. Torque should come in a lot sooner. I'm guessing he did a regual ignition retard instead of stepping it.


That's the ugliest dyno graph I've seen in 2-3 months. Got a map posted so we can help you out?

nerdsports

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by adseguy &raquo;</TD></TR><TR><TD CLASS="quote">That turbo isn't that small and shouldn't do that. Torque should come in a lot sooner. I'm guessing he did a regular ignition retard instead of stepping it.

That's the ugliest dyno graph I've seen in 2-3 months. Got a map posted so we can help you out?</TD></TR></TABLE>

I didnt think about the whole ignition retard thing. I was curious what he used to tune the setup.

urbansi

Would also have to agree that the turbo in use shouldnt be falling off that soon... expecially on an LS only pushing 6700-6800rpm's.

My 18G on a B16 made power to 8250rpm which is considerably smaller.

Timing is everything on boosted setup's, well really in all setups.. timing can make or break(literally) a car as far as power.

99ekb18b

it was tuned on crome. i don't have a map, the tuner should have one. i'll go and ask for one. dang he must have been a sorry *** tuner, wasted 150 dollars for a sorry *** tune.
i was thinking that too, that my turbo shouldn't be falling off that soon too.