Went to the dyno today.
 

So, i went to the dyno today. A little less power than i expected but that just means that there is power left on the table.
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Discuss.

Very nice numbers, I think there is still left on the table.
You need a real exhaust, go to a 3" off the turbo and you should see some gains in both power and spool.

You stopped revving at 5600? You sorta missed out on more of your powerband...

Nice numbers...I also left power on the table...:jerkit:2.25" exhaust!

you let off wayyyy too early. the turbo is spooling slow for a 1.8 and losing torque fast. needs more exhaust.

even if we guess that you lost torque in a linear fashion to redline, you would of had a peak HP of 226. you lost 15 tq from 4700 to 5700. lets say you drop 25 more from 5700 to 7000. thats a total of 170 rwtq at 7000rpm....giving you 226rwhp.

we dont drive mustangs...we drive high reving miatas.

i am running 3" crush bent(i know i know) from the dp back. When the cutout is open, it is basically 3" straight pipe

one of the tuners there said to pull some timing and fuel down low to make the turbo spool faster. I also need ebc.

was the cutout open? how much boost was it? why did you lift?

i have another sheet. Sorry, i got up early this morning and didnt think when i snapped a pic of that one. The other one is 219 peak hp.

yes, dumping fueling and retarding timing as the turbo spools will help...let me look at your timing map. also remember, mustang dynos read fairly low compared to the SAE standard dynojet dyno, unless they corrected for it.

the other one goes to redline.

With it being that choppy i think i have spark blow out. My plugs are gapped to .25 but i have shitty 7.5mm wires.

sorry, post whoring. anyway, i was running 14psi and the cutout was open.

You're torque curve is screaming for a parachute. ;)
Have not looked at your log, but I'm going to guess you need IGN advance. I think that last run had 245rwhp in it based on what was happening prior to the free fall.

ok, that's very odd for a your turbo to run out of efficiency like that. you are running plenty of spark in boost. i gotta blame the exhaust.

but logging at the logs, you can see where the boost starts to rise slowly, then starts making it fast. it's also at the same time you finally retard a lot of spark. dropping from 27° to 20°

I personally start at 10-12° at low boost/rpms and build to 17° at redline. it's safe to add timing as rpms increase.

now take a look at how my turbo spools compared to your.....i have a t3 super 60. so we actually have the same exact compressor wheel, and we have the same exact manifold. now my turbine is actually larger than yours, and if you have a .63 a/r then we have equal a/r. so with your 1.8L you should spool faster than me, but that's not the case.....notice my spark angle....

oh i just noticed you dont have an EBC yet....get on that son!

Would a boost leak cause it to drop like that? Basically, i need to get ebc and go have someone tune my car. My tune is pretty botched right now.

if i log my ebc against wastegate, it's silly......give me a sec.

not really no. you're holding boost to redline. to me it seems the turbine is choking. since we know that turbo should be good for torque to redline a case of excessive back pressure would be wasting energy pushing exhaust out of the head instead of pushing the pistons down.

hmm, thats shitty. I havent had a good look at the exhaust since i got it. I noticed a large improvement. Maybe i will take it to a different guy and ask him to put it up and look for what he thinks may be restricting it and tell him that i will pay him to fix whatever it is.

similar experience
 

My first dyno plot looks very similar with a torque fall. I'm running a universal cat that flows <300cfm and my ecu pulled out a full 10* of IGN advance (thus peak hp at 5700rpm).

he has 18* at redline.

oh, oops

nice job wess the peeps at automotion are definatley cool. They dont run corrected numbers most of the time unless you ask them to. Next time you go back try the 0-60 and 1/4 mile option cyndie i believe her name was says it is a very consistant indicator on what you could run with out spinning etc.

yeah, cyndie or however you spell her name. That was her. It was a great experience and i definitely will go back.

what do you mean log it against your wastegate?

if i log a 3rd gear pull utilizing my ebc solenoid vs making the same psi with my wategate.

I make 11psi with my wastegate, i run 12psi with my ebc. I make 12psi at 3750RPM when i use my EBC. I make 11psi at 4900RPM with an open wastegate line.

wow, so mbc is about middle ground?

yeah, a MBC is much improved. the reason is being able to keep the wastegate closed while you make your target boost level. But even a mbc has to start opening as the preload of the spring gets overwhelmed, this cracks open the wategate, and you loose spooling power as the exhaust fails to pass over the turbine.

yeah, im running an mbc right now. I can only imagine the shitty spool if i was running wastegate pressures.

so brain, what does your spark map look like? I would like to see if i can get it to spool a bit quicker.

Driving Impressions???
 

I know you are not totally happy with your dyno sheet but what are your driving impressions of your current set and tune? Taking the dyno sheet out of the picture, is this tune/setup seem like something you could live with easily? Sorry for all the questions............:)

if you want to see your maximum spool potential...

set your boost spark/fuel cut at your max boost

and remove your WG line*






*AT YOUR OWN DAMN RISK!:yippee:

lol, i guess that would work but no.

I am very happy with the way the car drives. The only thing I've lost to was an 11 second trans am and i beat him once because he couldn't hook up. The car pulls hard and the power is very usable. I was worried about the spool time of the bigger gt28 and you can see it on the dyno but as far as daily driving, not a big deal. I still have plenty of passing power and i can fill gaps in traffic very easily. Honestly, if i hadn't dyno'ed it, i wouldn't be looking for more power. However, now that i see that the power is there for the taking, i want it. now. I'm looking for a stockish c6 vette to go against. That is kind of a benchmark for me.

Okay, i got to thinking, would a slipping clutch cause my dyno chart to look like this? I have noticed my clutch slipping lately. I raced an srt4 from a dig and i had to just let out the clutch slip was so bad. I'm going to call the guy that sold me the clutch and see what he can do to help me out.

(all races described in this post were performed on a track, street racing is illegal and dangerous.)

Not that one. My stock 2003 made 130hp on that same dyno.


http://gallery.wewt.net/albums/dyno/IMG_1230.sized.jpg

So i am thinking that it is a little clutch slip action. I am going to swap the clutch and try to make it to the dyno again.