Just got back from the dyno

ForceFed4g63 · 03-29-2011, 06:43 PM

Well I just got back from the dyno. I just wanted a baseline to see what I was working with before I start doing any other modifications. I'm happy with the results, but as you can see from the graph I've got a loooong ways to go. I was hitting a spike of about 17 psi and falling to about 11 around redline. There was also a little bit of misfiring which I can hopefully correct by changing out the plugs. I will have a tuning solution in the next month or so hopefully, and then I'll be able to fix some of the issues as far as leaning out and holding some more boost to redline. I'll also have a video of the runs up tomorrow.

Sean · 03-29-2011, 07:18 PM

Nice numbers. Is it a GSX?

bambooi · 03-29-2011, 07:20 PM

Its an SRT4. SRT4s run lean! Congrats on the numbers. I wonder if I could put 400 on a dynojet.

ForceFed4g63 · 03-29-2011, 07:26 PM

Thanks guys! Yea it is running lean which I don't like, I need to get it tuned! Not too shabby for an untuned stock turbo though.

ForceFed4g63 · 03-31-2011, 08:02 PM

Finally got a couple videos up. Nothing special.

bambooi · 03-31-2011, 08:11 PM

turbo sounds like its on its way out.

CPTNSLOW · 03-31-2011, 08:28 PM

Is the graph so jumpy BC you were misfiring? What did it look like without the smoothing set on 5

ForceFed4g63 · 03-31-2011, 09:02 PM

Quote:

Originally Posted by bambooi

turbo sounds like its on its way out.

The turbo is fine, the little bit of flutter you hear is the internal wastegate regulating the boost. Besides, if it was on its way out it wouldn't have made those numbers on such low boost.

Quote:

Originally Posted by CPTNSLOW

Is the graph so jumpy BC you were misfiring? What did it look like without the smoothing set on 5

Yes there was some misfiring, I'm replacing the plugs this weekend, hopefully it should smooth it out a bit. The factory tune is also not that great.

Matts94Z28 · 03-31-2011, 09:19 PM

Looks like it would be a good match for the cobalt. You coming out Saturday?

slowgreen99 · 03-31-2011, 09:20 PM

Quote:

Originally Posted by Matts94Z28

Looks like it would be a good match for the cobalt. You coming out Saturday?

Dont worry, Matt wont show.

Matts94Z28 · 03-31-2011, 09:22 PM

Stfu. Where have you been the last few times? Bring your turd out.

slowgreen99 · 03-31-2011, 09:24 PM

Quote:

Originally Posted by Matts94Z28

Stfu. Where have you been the last few times? Bring your turd out.

I was there phuckstick! Didnt see the purple thing either!

Matts94Z28 · 03-31-2011, 09:26 PM

Because its on jackstands!

So, forcefed, will you be out Saturday?

ForceFed4g63 · 03-31-2011, 10:07 PM

Yea man I'll be there Saturday night, I'll be at Dorchester on Sunday too hopefully.

L.C. · 03-31-2011, 10:34 PM

Quote:

Originally Posted by bambooi

turbo sounds like its on its way out.

No, sounds like the blow off valve is leaking... If it's adjustable I'd check the spring tension on the diaphragm, make sure it's not too loose.

And if it was breaking up, even with new plugs make sure you set the gap. Don't know what's good for SRTs though, .22-.24 with stock coils (~.28 w/COP) works on evos but its probably way off of what those things like.

Besides the smoothing though, its a nice looking graph, good flat torque curve that you can actually use.

ForceFed4g63 · 03-31-2011, 10:43 PM

Quote:

Originally Posted by L.C.

No, sounds like the blow off valve is leaking... If it's adjustable I'd check the spring tension on the diaphragm, make sure it's not too loose.

And if it was breaking up, even with new plugs make sure you set the gap. Don't know what's good for SRTs though, .22-.24 with stock coils (~.28 w/COP) works on evos but its probably way off of what those things like.

Besides the smoothing though, its a nice looking graph, good flat torque curve that you can actually use.

It might also be the BOV, you're right. It's an HKS SSQV, I'll definitely check it out while I'm working on the car this weekend. Supposedly a good gap for these mods is .35 so I'll start there and see what happens.

The torque is a lot of fun, but this past week with all of the rain has sucked, haven't been able to have any fun

slowgreen99 · 03-31-2011, 10:45 PM

Idk imports, but .28-.30ish wouldnt hurt.

CPTNSLOW · 03-31-2011, 11:26 PM

I've always ran .28 with my car. But its just a blown ferd

L.C. · 04-01-2011, 12:58 AM

Quote:

Originally Posted by ForceFed4g63

It might also be the BOV, you're right. It's an HKS SSQV, I'll definitely check it out while I'm working on the car this weekend. Supposedly a good gap for these mods is .35 so I'll start there and see what happens.

The torque is a lot of fun, but this past week with all of the rain has sucked, haven't been able to have any fun

Yeah those super sequentials have a plastic diaphragm, I've never liked them... The Type II's, the 'race' version, work really well though, same design just beefed up and all billet.

As far as the plug gap goes, yeah see what happens with .35 and if its still breaking up just step it down .02 or so at a time until you find your magic number. You loose a little throttle response the smaller the gap you go (very minimal though, most don't even notice) but I forgot you're not running much boost so you shouldn't have to pull them too many times to get it right.

My shit hasn't left the garage in like a week and a half with all this BS weather. Tomorrows gonna be a good day for a wash though, car's still dusty from the few hours it was out in the pollen.

Can't wait for this weekend weather!

ForceFed4g63 · 04-01-2011, 08:33 AM

Will do, thanks! Not looking forward to checking the BOV, huge PITA to get to on these cars. I miss my DSM, everything's so easy to get to.

03-29-2011, 06:43 PM	#1
ForceFed4g63 Senior Member Join Date: Oct 2009 Location: Aiken Posts: 7,002	Just got back from the dyno Well I just got back from the dyno. I just wanted a baseline to see what I was working with before I start doing any other modifications. I'm happy with the results, but as you can see from the graph I've got a loooong ways to go. I was hitting a spike of about 17 psi and falling to about 11 around redline. There was also a little bit of misfiring which I can hopefully correct by changing out the plugs. I will have a tuning solution in the next month or so hopefully, and then I'll be able to fix some of the issues as far as leaning out and holding some more boost to redline. I'll also have a video of the runs up tomorrow.

03-29-2011, 07:18 PM	#2
Sean Senior Member Join Date: Jul 2010 Location: Wilmington, NC Posts: 918	Nice numbers. Is it a GSX? __________________

03-29-2011, 07:20 PM	#3
bambooi Senior Member Join Date: Apr 2009 Posts: 1,324	Its an SRT4. SRT4s run lean! Congrats on the numbers. I wonder if I could put 400 on a dynojet. Last edited by bambooi; 03-29-2011 at 07:22 PM.

03-31-2011, 08:28 PM	#7
CPTNSLOW Senior Member Join Date: Feb 2011 Location: Florence Posts: 511	Is the graph so jumpy BC you were misfiring? What did it look like without the smoothing set on 5 __________________ Something witty and confusing

03-31-2011, 09:19 PM	#9
Matts94Z28 Senior Member Join Date: Apr 2008 Location: Summerville Posts: 12,039	Looks like it would be a good match for the cobalt. You coming out Saturday? __________________ Charleston Performance Solutions 4560 Rivers Ave. N. Charleston SC 29405 843-225-1142 https://www.facebook.com/CharlestonPerformanceSolutions www.facebook.com/Selepack

03-29-2011, 07:26 PM	#4
ForceFed4g63 Senior Member Join Date: Oct 2009 Location: Aiken Posts: 7,002	Thanks guys! Yea it is running lean which I don't like, I need to get it tuned! Not too shabby for an untuned stock turbo though.

03-31-2011, 08:02 PM	#5
ForceFed4g63 Senior Member Join Date: Oct 2009 Location: Aiken Posts: 7,002	Finally got a couple videos up. Nothing special.

03-31-2011, 08:11 PM	#6
bambooi Senior Member Join Date: Apr 2009 Posts: 1,324	turbo sounds like its on its way out.

03-31-2011, 09:22 PM	#11
Matts94Z28 Senior Member Join Date: Apr 2008 Location: Summerville Posts: 12,039	Stfu. Where have you been the last few times? Bring your turd out. __________________ Charleston Performance Solutions 4560 Rivers Ave. N. Charleston SC 29405 843-225-1142 https://www.facebook.com/CharlestonPerformanceSolutions www.facebook.com/Selepack

03-31-2011, 09:26 PM	#13
Matts94Z28 Senior Member Join Date: Apr 2008 Location: Summerville Posts: 12,039	Because its on jackstands! So, forcefed, will you be out Saturday? __________________ Charleston Performance Solutions 4560 Rivers Ave. N. Charleston SC 29405 843-225-1142 https://www.facebook.com/CharlestonPerformanceSolutions www.facebook.com/Selepack

03-31-2011, 10:07 PM	#14
ForceFed4g63 Senior Member Join Date: Oct 2009 Location: Aiken Posts: 7,002	Yea man I'll be there Saturday night, I'll be at Dorchester on Sunday too hopefully.

03-31-2011, 10:45 PM	#17
slowgreen99 Senior Member Join Date: Jan 2008 Location: Summerville Posts: 7,740	Idk imports, but .28-.30ish wouldnt hurt. __________________ M.R.E. Bad Bob Motorsports

03-31-2011, 11:26 PM	#18
CPTNSLOW Senior Member Join Date: Feb 2011 Location: Florence Posts: 511	I've always ran .28 with my car. But its just a blown ferd __________________ Something witty and confusing

04-01-2011, 08:33 AM	#20
ForceFed4g63 Senior Member Join Date: Oct 2009 Location: Aiken Posts: 7,002	Will do, thanks! Not looking forward to checking the BOV, huge PITA to get to on these cars. I miss my DSM, everything's so easy to get to.