italstallion

hey guys i just brought my car to the dyno today and im very dissapointed with the results the setup is

d16z6 stock motor with compression at 172 on each cylinder
garret t25 at 9 psi
2.5 IC piping
2.5 inch DP
2.5 inch mandrel bent s.s exhaust with a cat.
dsm 450's
tuned with cromepro by a very good local tuner the afr's are all around 12:1

on the dyno it made 135whp and 153lbs of torque ......the dyno it was on was a dynojet. So my question is why is it that most other people who have the same setup as me get around 190 whp and like 175 lbs torque???

boosted_dc2

why are you running a cat? just curious. do you have your maps that you can upload. also what kind of timing?

Landon

boosted_dc2

you have more torque than horsepower, thats cool.

Landon

ludesleep

thats not cool...any motor that makes more torque than power is a turd!...especially if it wasnt built to pull things...

093turbo16

iTrader: (2)

Are you sure the timing is correct.. meaning the actual engine timing.

italstallion

yeah im running a cat because its illegal to not run one in canada and plus i dont want my car smelling like rotten eggs. also the turbo is pretty junk could that be the reason.

boosted_dc2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by italstallion &raquo;</TD></TR><TR><TD CLASS="quote">yeah im running a cat because its illegal to not run one in canada and plus i dont want my car smelling like rotten eggs. also the turbo is pretty junk could that be the reason.</TD></TR></TABLE>

i hope your kiding.

Landon

boosted_dc2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludesleep &raquo;</TD></TR><TR><TD CLASS="quote">thats not cool...any motor that makes more torque than power is a turd!...especially if it wasnt built to pull things...</TD></TR></TABLE>

so a 4G63 is a turd?

Landon

italstallion

umm no why would i be kidding

jfoster

iTrader: (1)

we'll need some more specifics .... like your timing and posting a graph would help.

boosted_dc2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by italstallion &raquo;</TD></TR><TR><TD CLASS="quote">umm no why would i be kidding</TD></TR></TABLE>

well a crappy turbo would probably have EVERYTHING to do with it depending on whats wrong with it.

by running a cat you are limiting your potential quite a bit. also without seeing your tune its hard to say if its mechanical or the tune.

Landon

italstallion

yea the turbo has a quite a bit of shaftplay and also it drops to 5 psi at redline.i think its probably the turbo....ill try and get the map to post them too

sbiggi

a bad cat smells like rotten eggs. No cat smells like ... strong exhaust

italstallion

wow i never knew that...... i thought that having no cat would make it smell like rotten eggs.

ludesleep

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted_dc2 &raquo;</TD></TR><TR><TD CLASS="quote">

so a 4G63 is a turd?

Landon</TD></TR></TABLE> if it makes more torque than power then yes.

willyboyK20

I just had my y8 dynoed
159 whp and 142 wtq
I tuned it on cromepro also

t3/t4 50trim a/r .48 @ 5psi
2.5 inch downpipe
2.5 inch cat
2.25 exhaust

here is the graph

boosted_dc2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludesleep &raquo;</TD></TR><TR><TD CLASS="quote"> if it makes more torque than power then yes. </TD></TR></TABLE>

pure ignorance

Landon

Lightweight Boost

turn it up . willieboy . i feel with another 3 -4 lbs adn a little more timing you could be pushing 185-200. running a bit rich around 3000-3500. pull a little fuel out there . remember lean is mean

igo4bmx

post your power to speed datalogs.
make sure its not a slipping clutch

Bailhatch

if you make more tq than hp either your turbo is small and/or your motors VE is at a low rpm. Ill tell you one thing, it's no fun with short gearing (Z6,b16,gsr,itr trannys) except for auto-x. Im all set with making good tq at low rpms on a front drive car. I like traction, it makes me go fast.

id say this turbo is blown or there is another problem. If the cat is in good shape it's not that. you can make well over 300whp with a 2.5" cat.

miro_gt

it's a WG / exhaust related problem, as I told you over .turbod16.com

boosted_dc2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">if you make more tq than hp either your turbo is small and/or your motors VE is at a low rpm. Ill tell you one thing, it's no fun with short gearing (Z6,b16,gsr,itr trannys) except for auto-x. Im all set with making good tq at low rpms on a front drive car. I like traction, it makes me go fast.

id say this turbo is blown or there is another problem. If the cat is in good shape it's not that. you can make well over 300whp with a 2.5" cat.
</TD></TR></TABLE>

hey whats up bail!!

i think hes running a stock cat.

Landon

khmboostedeh2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by miro_gt &raquo;</TD></TR><TR><TD CLASS="quote">it's a WG / exhaust related problem, as I told you over .turbod16.com</TD></TR></TABLE>

Id agree with exhaust, but not so much wastegate. If your boost guage is going to 9psi, but the motor is not producing any power I can foresee two possible problems. Either something is choking up your motor where air is flowing fine into the motor but not out, or timing is extremely far off. Nonetheless, Im no pro, and without any fuel/timing graphs & dyno sheets my guess is as useful as any others.

Ckjeepin

So i guess my srt4 is a turd..
It only made 385whp. 450+tq
And my evo must be a turd too
320hp and 340tq

CRXdan

if the boost is dropping off to 5 psi at redline theres your problem. you knew the answer to your question all along.
Rebuild or replace the turbo. Try a 14b this time, much better results.