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Cam+Tune performance same as before...

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Old Jul 14, 2007 | 02:07 PM
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Default Cam+Tune performance same as before...

Before I installed my cam and got it professionally tuned I ran a 13.2 @ 110 at the track and with all the new stuff I can only run a 13.15 @ 112!


The temperatures were within 10* of each other and had extremely similar 60' times. The tuner was also very well respected here on the boards...


Im very confused
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Old Jul 14, 2007 | 02:21 PM
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and what cam did you put in?
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Old Jul 14, 2007 | 04:16 PM
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Originally Posted by AU N EGL
and what cam did you put in?
http://www.sdparts.com/product/12480...mshaftKit.aspx

The GM Hot Cam 219/228
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Old Jul 14, 2007 | 06:37 PM
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bump, this is depressing!
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Old Jul 14, 2007 | 07:35 PM
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Did you get a dyno-tune or mail-order tune?
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Old Jul 14, 2007 | 07:38 PM
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Originally Posted by PewterMetallic98
Did you get a dyno-tune or mail-order tune?
Professional dyno tune. They used a wideband and everything, I can see the bungs they added .
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Old Jul 14, 2007 | 07:42 PM
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Originally Posted by BrianG01
Professional dyno tune. They used a wideband and everything, I can see the bungs they added .
Hot damn! Well what were the before and after numbers on the dyno? It could a few things....

1. Cam was not put in dot-to-dot
2. Tune isn't right
3. Traction loss
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Old Jul 14, 2007 | 07:44 PM
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Originally Posted by PewterMetallic98
Hot damn! Well what were the before and after numbers on the dyno? It could a few things....

1. Cam was not put in dot-to-dot
2. Tune isn't right
3. Traction loss

There was no before dyno done, which I thought there would be.

What do you mean dot to dot? If you mean the dots on the sprockets, they were spot on. Would it even work if they were not?

From what I could tell, traction hasnt been the problem

Last edited by BrianG01; Jul 14, 2007 at 07:48 PM.
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Old Jul 14, 2007 | 07:47 PM
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Originally Posted by BrianG01
There was no before dyno done, which I thought there would be.

What do you mean dot to dot?

From what I could tell, traction hasnt been the problem
Look on LS1howto.com on the cam installation in an LS1. It will have pictures and better explain things for you. The cam dot has to be perfectly lined up with the crank dot. If they aren't it could cause some serious power loss.
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Old Jul 14, 2007 | 07:50 PM
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Originally Posted by PewterMetallic98
Look on LS1howto.com on the cam installation in an LS1. It will have pictures and better explain things for you. The cam dot has to be perfectly lined up with the crank dot. If they aren't it could cause some serious power loss.
I used ls1howto as my guide. I editied my original post to say that they were spot on

Last edited by BrianG01; Jul 14, 2007 at 07:52 PM.
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Old Jul 14, 2007 | 07:54 PM
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Originally Posted by BrianG01
I used ls1howto as my guide. I editied my original post to say that they were spot on
Oh ok, well yea it will run without them being dotted correctly. You would just lose a lot of power depending on how far off they were I believe.
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Old Jul 14, 2007 | 08:00 PM
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Originally Posted by PewterMetallic98
Oh ok, well yea it will run without them being dotted correctly. You would just lose a lot of power depending on how far off they were I believe.
If its off, it has to be off by atleast 1 'tooth' right? If so, than it is not off.
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Old Jul 14, 2007 | 08:06 PM
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It may all be in my mind now, but it seemed like it pulled harder before the tune. The tune deffinately made it more driveable and removed the poor idling
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Old Jul 16, 2007 | 11:33 AM
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I'm not a cam expert, but a 219/228 cam does not sound like a very big cam. I would not expect huge gains from that.
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Old Jul 16, 2007 | 11:38 AM
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Originally Posted by STLKillerC5
I'm not a cam expert, but a 219/228 cam does not sound like a very big cam. I would not expect huge gains from that.
That is actually a pretty big cam for 347. With that cam and a tune, I would expect to see 20 to 25 rwhp.

Keith
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Old Jul 16, 2007 | 11:40 AM
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its not a big cam, but i did a 224/224 and got 411 rwhp...to tell if its yoru driving or a malfunction, we need to see the dyno graph of the set up you have now. a "professional" dyno tune dosnt always mean "professional"
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Old Jul 16, 2007 | 12:23 PM
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Originally Posted by kromberg
That is actually a pretty big cam for 347. With that cam and a tune, I would expect to see 20 to 25 rwhp.

Keith
No it's a very small cam. I'm running a 230/232 .598/.585 cam and that is probably considered medium to large. We really need to see some slips. He gained 2mph, so there is power being made. My guess is that his 60' times are about .1 slower with the cam, which accounts for this. A tenth off your 60' time is worth .15-.2 at the end.
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Old Jul 16, 2007 | 12:29 PM
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ummmm yeah, a 219/228 is not a big cam. its a baby one and the other guy was right, dont expect big gains. i think a z06 cam is 216 something something.

If you went through the hastle of doing a cam swap why did you not go bigger in the first place? did you do your research? There are alot of very streetable cams out there... I would have done a 228 or 232 maybe a MS4 (239/242, .649"/.609") lol been there done that!

Last edited by kornfreak_401; Jul 16, 2007 at 12:32 PM.
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Old Jul 16, 2007 | 12:32 PM
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Baby cam = baby increase.
What was the HP @ the wheels?
Any supporting mods?
That little cam by itself wont gain you much at all in the HP department.
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Old Jul 16, 2007 | 12:36 PM
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Originally Posted by 99C5JA1
No it's a very small cam. I'm running a 230/232 .598/.585 cam and that is probably considered medium to large. We really need to see some slips. He gained 2mph, so there is power being made. My guess is that his 60' times are about .1 slower with the cam, which accounts for this. A tenth off your 60' time is worth .15-.2 at the end.
i know everyone says, the track is where it shows, but seriously, it woudl have to be the same run, same launch,conditions, tire, shift point, etc...to really tell. I say you need a dyno graph, thats the real numbers, and also the A/F ratio and A/F curve
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