This past weekend I drove down to P1 for some MD 'roller action'. I gave Yack a call on his celley and told him to hop in the 'Lear' and fly to the south side of Charlotte for a tuning session.

At the dyno:


Here is the final plot:
(note Mustang Dynos read lower than Dynojet dynos)

+6 hp and +0.4 ft-lbs using the VAFC for tuning.

Mods:
-p/s belt removed
-VAFC
-JDM header
-2.5" SMSP cat
-air filter sitting outside of the box

The first run was with the VAFC zeroed out:
(note the a/f reading and it's path (green line))


The last run was with the final VAFC settings:


I also had to have some fun while I was there...
1/4 mile stunnas unite!


My thoughts on dead CATS...

My first SMSP cat died a while back (had a rattle)... so I was leary of getting a new one. The current one was installed and the car was tuned with the VAFC... this cat has ~8,600 miles on it (5 track events included) and not rattles at all.
My VAFC has negative settings from ~6,500 all the way to redline. I suggest strapping your car to a dyno and checking the a/f ratio to see if you have any issues.

I thought my second SMSP cat was dead due to a rattle... I did some looking around under the car and found the bracket was broken.
Quick fix... we-todd-didness.


FYI... this is my last Dynojet session to compare (same mods):

 

woot.

 

very nice, i got a raddle on my smsp to i haven't checked to see the problem yet (heatsheilds most likely). Again nice numbers

 

stunna

 

Forgot to add:

Yack used the OBD2 port to check/monitor a few things to ensure similar dyno pulls.
-ECT (water)
-IAT (air)
-long term fuel trim
-short term fuel trim

 

Whats your Vtec X-over and how much did you lean it out from 6500 on?

 

 

HollA bacK!

 

Pimp chitl...

Once I get my 1187 issues worked out (Pig's warranty has expired ), I'll let her loose on the Mustang. And get someone who knows how to drive run the quarter

 

Good Numbers..........

 

bah, **** the ITR, where's the boosted beater at?

 

 

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

 

Crazy.. Very amazing
with these simple mod.
Mods:
-p/s belt removed
-VAFC
-JDM header
-2.5" SMSP cat
-air filter sitting outside of the box


You have 20 + hp overstock...

OT: how many hp would removing PS belt give you?

 

this is really nice!!

 

nice #'s will!! maybe a dyno pull friday the 13th is in order to see if there are any issues wid 764...

dyno'd once when it was stock and since then added a JDM 4-1 and car sound cat.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rguy &raquo;</TD></TR><TR><TD CLASS="quote">Whats your Vtec X-over</TD></TR></TABLE>5200 ish me thinks

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rguy &raquo;</TD></TR><TR><TD CLASS="quote">how much did you lean it out from 6500 on?</TD></TR></TABLE>A lot.
Strap her down and check... every car will be different.

 

I don't know if they're all the same, but the mustang dyno I've been tuning on the for the past 2 years had a correction factor (to convert to dynojet #'s) around 1.1.

 

Sounds about right.

 

So where's the boosted beater at will?

 

why would you care about all that info , I just look at peak numbers....

 

Very smooth power. The vafc only seemed to help you tune out the top end though.

Going to get any new mods?

 

Nice work!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Typel2 &raquo;</TD></TR><TR><TD CLASS="quote">You have 20 + hp overstock...</TD></TR></TABLE>

At the wheels.. About 25hp more at the crank.

 

Good numbers, but won`t save you from the shame of public shitting