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Discussion Starter #1
Got my car back yesterday, and I can really feel the difference. I totally understand what everyone meant when they talked about the "driveability" of the car. I went through the drive through at Arby's and the girl had a hard time handing me my drink cause I was rocking back and forth so much! :gr_jest:

The dyno numbers can be seen here:
http://www.ls1gto.com/forums/attachment.php?attachmentid=3225

Does that chart look familiar? How about this one showing DY's stock and after cam graphs:
http://www.ls1gto.com/mygto/comparo.jpg

I have to say I was a little disappointed with the final numbers but LS1speed is working with me to find a few more ponies.

The car sounds pretty stock from 1k to 2k rpm but when you step on it she just screems. (I kinda like that :cool: )

Question I had was, I've now noticed what sounds like ping to me at low rpm under load, is that just the new valves or do I have a problem? I notice this at about 2500 rpm in 5th when I step on the gas.
 

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2004 Pontiac GTO
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167 Posts
Did Speed Inc. do the work on the engine? If so, that may be the problem :rolleyes:
 

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13 year owner
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You will notice more ticking noise from the extended lift in the valvetrain, but if you're hearing a ping from pre-ignition, I'd have that looked at in Jim's tune. Some slight almost non-existent ping under part throttle applications actually IS normal and is present even on stock cars. It's at WOT throttle that you don't want any.
 

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All I can say is, Wow. You guys are making me jealous with all this HP and TQ. :hail: I need to get a second job. :rolleyes:
 

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13 year owner
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Yea! Do you? :D

Were you listening to the guys at FLP complain about them?

FWIW, both my cars have been tuned by Jim at Speed Inc.. I was doing business with Tom when he was running it out of his garage in Hanover Park.
 

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2004 Pontiac GTO
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167 Posts
I did have some issues with them a while back (no oil in new rear end, found out at 50mph), but I am not trying to bring them to this board...my comment was purely a smart remark with no real harm intended :rolleyes: Speed is a good, strong shop that has plenty of experience with LS1 setups.
 

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Upstairs in the basement
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396 Posts
Audible ping at any RPM is not good on any motor. Try running the highest unleaded octane gas you can to see if it goes away. If it does then you have a detonation problem. There are places around that sell 98, 100 and 104 unleaded, you just have to look around. With the noise that the motor makes especially if you have headers and a louder exhaust chances are you wont even hear the ping at the higher RPMs but will hear it under the exact conditions you mention.

Another thought would be to use an Auto Tap and log the KR you get when you are driving around as well as the fuel trims. It may take a few drive cycles to get the fuel where it needs to be. It could be that you are just a little lean and the PCM should compensate if its not too lean. But I would try the higher octane as well as go back to the tuner and have them recheck it. Sometimes tuners just go for all out top end numbers and dont worry about the other 98% of the time which is when you are actually driving the car normally.
 

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13 year owner
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Ping is never good, but at part throttle applications, under load, there are times when it is inevitable.

I think you're confusing constant dieseling with a quick almost unaudible one or two pings in conditions I mentioned above. The later is actually acceptable and happens quite often, even on stock motors in Cavalier's.

It's the constant definitively audible dieseling at part throttle and especially at WOT throttle that is an issue!

You can scan the PCM to your hearts content while driving around normally, I bet you'll see tons of KR at part throttle under load applications and release of throttle applications which means the system IS working.
 

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13 year owner
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Quicksilver said:
I did have some issues with them a while back (no oil in new rear end, found out at 50mph), but I am not trying to bring them to this board...my comment was purely a smart remark with no real harm intended :rolleyes: Speed is a good, strong shop that has plenty of experience with LS1 setups.
Thank you for clarifying. All shops have issues here or there, however, as I mentioned, I've been doing business with Tom since he was running it out of his garage solely catering to F-Body's and Vette's. Since then he/they've moved three/four times due to constant increase in business load, expanded their product lines, and have a waiting list due to their popularity and quality.

Somewhere they've done some positive things. :)
 

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I saw your car yesterday morning when I was there for a dyno run. I then came back to drop off mine for a LT install..I figured it would best decision as it would probably take my whole day off to install.

I want to do H/C in the spring..I was thinking the same heads, maybe AFRs, but what are the cam specs?

Hopefully you get everything worked out..
 

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2004 Pontiac GTO
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Tom has built an amazing "Empire" and should be very proud of what he has accomplished...My problem occured a couple of years ago and could certainly be chalked up to the shop's growing pains at the time. They fixed it quickly and with great concern. I have no hard feelings towards Tom.

You know we have a bit of a "turf" war among the local performance shops :)
 

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13 year owner
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Absolutely. And because I know soo many peoples I somehow always get stuck in the middle of those turf wars. :D
 

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Quicksilver, I recall your situation, and I can admit we made a mistake, and I remember taking care of it as well. Mistakes will happen, but they have to be taken care of, and I try to make sure they are.

Glad to hear you got your new GTO too....

Tom
 

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Can't help ya, Sorry.
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There are other performance shops in this area? :D
 

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13 year owner
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Yes. :D
 

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Can't help ya, Sorry.
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Hmm who would have thunk..

Oh CJ, Sweet numbers. I am jealous.
 

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Discussion Starter #18
Thanks for all the comments.

It may not even be ping, I'm not sure if I'm just hearing the valves/lifters etc more now because of the open exhaust. It kinda sounds like my old '81 escort when it was bogged down bad. When I take it back I'll have them listen to it at the same conditions I'm talking about. Another thing about it is at around 4500 rpm it feels like someone turned on the "juice". This thing does better than stock at all rpms but it just takes off at 4500.
 

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Long tube headers, especially with offroads, have alot of resonation in the collector which sounds similar to "pinging". The dual valvesprings make more noise as well.

We will listen to it with you to verify.
 

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Quicksilver said:
You know we have a bit of a "turf" war among the local performance shops :)
You're lucky. We have zero performance shops around here that I know of (or don't). That is one of the reasons that I have been reluctant to do anything to my car. Sonny's Racing here in town only caters to the high end stuff (500 C.I. or better). They have an awesome reputation though.
 
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