Dynamometer Results & Comparisons - LS6--->LSX Intake Bolt-On Dyno Results




Cobraeater
03-26-2004, 02:40 PM
I did a before/after back-to-back test going from the ls6 intake to the lsx to see the results and here they are. :bang:

I lost 1hp and 1 torque switching from the LS6 intake to the 78mm LSX Intake.

Here's the graph comparing the best runs, ignore the spike with the LSX and watch the curves at a peak of 5600rpm the hp is down about 1 from the ls6 intake.
http://www.cobraeater.cz28.com/cgi-bin/i/images/LS6%20VS%20LSX.JPG

Here's the ls6 intake runs.
http://www.cobraeater.cz28.com/cgi-bin/i/images/LS6%20Intake%20Dyno%20Runs.jpg

The lsx intake runs.
http://www.cobraeater.cz28.com/cgi-bin/i/images/LSX%20Intake%20Dyno%20Runs.jpg

So, it looks like at the all bolt-on level the engine just doesn't need any more air than the ls6 intake provides.

BTW, I gained 7hp and 10 torque going from the ls1 intake to the ls6 intake.


beardWS6
03-26-2004, 02:49 PM
You need a good set of heads and a big cam to really enjoy it! Spend the money!

chupr0kabra
03-26-2004, 02:52 PM
You could send me the LSX intake! It would be an upgrade from stock for me, then we could compare notes. :naughty:


-Mike


boomcase
03-26-2004, 04:07 PM
Dam that Blows , sorry to hear that. Im not impressed with the results ive been seeing, Glad I picked up an LS6 intake used for 300.00 shipped instead of the LSX.

ITSovr4U
03-26-2004, 06:20 PM
I did a before/after back-to-back test going from the ls6 intake to the lsx to see the results and here they are. :bang:

I lost 1hp and 1 torque switching from the LS6 intake to the 78mm LSX Intake.

Here's the graph comparing the best runs, ignore the spike with the LSX and watch the curves at a peak of 5600rpm the hp is down about 1 from the ls6 intake.
http://www.cobraeater.cz28.com/cgi-bin/i/images/LS6%20VS%20LSX.JPG

Here's the ls6 intake runs.
http://www.cobraeater.cz28.com/cgi-bin/i/images/LS6%20Intake%20Dyno%20Runs.jpg

The lsx intake runs.
http://www.cobraeater.cz28.com/cgi-bin/i/images/LSX%20Intake%20Dyno%20Runs.jpg

So, it looks like at the all bolt-on level the engine just doesn't need any more air than the ls6 intake provides.

BTW, I gained 7hp and 10 torque going from the ls1 intake to the ls6 intake.
If your stock heads flow 230cfm and you r ls6 intake can flow almost 280, Why would you think you would gain alot your intake already out flows the heads by a large margin. You might gain a little velocity but with stock heads it wont help much. That is just my .02. If it is even worth that. :usa:

destroyerSS
03-26-2004, 06:35 PM
did you do any tuning after the lsx swap?

Slowhawk
03-26-2004, 06:57 PM
Looks like the LSX did lean out your A/F a bit.Same thing happened to me.We then richened it up and gained 5-10 across the rev range.

Revelation222
03-26-2004, 07:49 PM
I did a before/after back-to-back test going from the ls6 intake to the lsx to see the results and here they are. :bang:

I lost 1hp and 1 torque switching from the LS6 intake to the 78mm LSX Intake.

Here's the graph comparing the best runs, ignore the spike with the LSX and watch the curves at a peak of 5600rpm the hp is down about 1 from the ls6 intake.
http://www.cobraeater.cz28.com/cgi-bin/i/images/LS6%20VS%20LSX.JPG

Here's the ls6 intake runs.
http://www.cobraeater.cz28.com/cgi-bin/i/images/LS6%20Intake%20Dyno%20Runs.jpg



The lsx intake runs.
http://www.cobraeater.cz28.com/cgi-bin/i/images/LSX%20Intake%20Dyno%20Runs.jpg

So, it looks like at the all bolt-on level the engine just doesn't need any more air than the ls6 intake provides.

BTW, I gained 7hp and 10 torque going from the ls1 intake to the ls6 intake.

With a simple tune you should gain around 10hp/10tq. From what I've seen about 80% of the people who get the LSX gain the HP in the tune. Others just get lucky and get most of the gain right away based on thier set-up. Not to mention, as others have suggested, there is probably more power left on the table from the LSX with a cam and/or head swap.

Also, did you check the TB problem many people have been having? Just checking to be sure. Good luck with your purchace. If you end up not liking it I'll take it off your hands from ya. :judge: :jest:

Cobraeater
03-27-2004, 12:51 AM
I had a full LS1 Edit tune done right after the lsx intake swap.

The a/f was set to 13.0 all across the rev range and it still made the same power.

The 98-99 throttle body cams open 100% with the lsx since they're smaller than the 00-02 tb cams, so I didn't need to grind on it or anything.

9T9BlueTA
03-27-2004, 02:50 PM
That sucks man but thank you for sharing the info.

Revelation222
03-27-2004, 02:57 PM
I had a full LS1 Edit tune done right after the lsx intake swap.

The a/f was set to 13.0 all across the rev range and it still made the same power.

The 98-99 throttle body cams open 100% with the lsx since they're smaller than the 00-02 tb cams, so I didn't need to grind on it or anything.

Ouch...Well I guess all I can say is either wait until you go into the engine to see if there are any gains or try to resell the intake to get some of your money back. Sorry to hear about your luck.

Revelation222
03-27-2004, 02:59 PM
Ouch...Well I guess all I can say is either wait until you go into the engine to see if there are any gains or try to resell the intake to get some of your money back. Sorry to hear about your luck.

Oh...Is it possible that the Shaner TB that you recieved back in place of your old TB was of a newer design? It's a long shot but im just trying to look at it from every angle.

pdd
03-27-2004, 06:01 PM
That sucks man but thank you for sharing the info. :stupid:

WS6snake-eater
03-27-2004, 07:04 PM
The 98-99 throttle body cams open 100% with the lsx since they're smaller than the 00-02 tb cams, so I didn't need to grind on it or anything.


So you are still using the stock throttle body?

Cobraeater
03-27-2004, 08:22 PM
Oh...Is it possible that the Shaner TB that you recieved back in place of your old TB was of a newer design? It's a long shot but im just trying to look at it from every angle.

No, it was just another 98-99 tb like what was on my car expect Shaner ported it.

GM made the throttle body cams for 98-99 smaller than the 00-02 for some reason.

1QWIKZ
03-27-2004, 08:29 PM
:thumbsdow that blows bro..

Iv_z28
03-27-2004, 09:24 PM
I had a full LS1 Edit tune done right after the lsx intake swap.

The a/f was set to 13.0 all across the rev range and it still made the same power.



Well, it IS pretty obvious from your grath that your A/F ratio have gone up with the LSX.
If you are saying that your graph is BEFORE the tuning, and tuning didn't change much, then I would still check if, f.e., the timing is right. Why don't you post the graph after tuning?

Cobraeater
03-28-2004, 01:40 AM
Well, it IS pretty obvious from your grath that your A/F ratio have gone up with the LSX.
If you are saying that your graph is BEFORE the tuning, and tuning didn't change much, then I would still check if, f.e., the timing is right. Why don't you post the graph after tuning?


The dyno graphs above were all done on the stock tune.

I'm going to MMT/HPE probably on Monday, so I'll post the tuned dyno graphs late Monday or Tuesday.

The timing was bumped up from 24-26* in the midrange to 27* and in the upper rpms it was 28* with the stock tune and ls1 edit.

Mike K.
03-29-2004, 12:19 AM
Damn I was really hoping the LSX intake would be our savior intake. I am a little confused though was your car actually tuned after the above dynos that you posted to correct for it being a tad leaner? It sounds like it was but that your graph looked the same as before the tune with the leaner a/f ratio. Did I understand right?

Cobraeater
03-29-2004, 12:23 AM
I had the car tuned after the graphs above to a 13.0 a/f and I'll post those tuned graphs tomorrow or Tuesday.

steve-d
03-29-2004, 08:55 AM
Hello,

If you have a H&C car w/all the goodies and a good tune, will it be necessary to retune it after upgrading w/the LSX???

Its my understanding that if you've had the AF ratio set to around the generally accepted performance ratio of 12:1, then the computer will recognize the newly increased airflow and adjust accordingly. IOW, it'll increase the fuel flow to bring the ratio back to 12:1.

Am I missing something? Just thought I'd ask the collected brain trust about this as this is exactly where I am regarding an LSX install next week.

Best Regards
Steve

Smoke_ur_5.0
03-30-2004, 02:08 PM
We didn'y pick up anything with the 78mm LSX on a bolt on car until we tuned it. Picked up 6rwhp and 7rwtq but pick up 15hp and 10tq in the lower rpms.

Zero2Sixty
03-30-2004, 02:33 PM
Yes it seems that tuning really seems to be helping ppl out with the LSX.
Glad to see you picked up some rwhp.....

JurisAg02
03-30-2004, 03:49 PM
isn't this exactly what happened with the Weiland intake users also? :confused:

Speedfreaks101
03-30-2004, 04:36 PM
I don't beleive that the LS6 intake leaves a lot to be improved on. GM designed a great intake and for an aftermarket manufactur to improve upon it in the rpm range that most of us use will be quite a feat IMO. Look at the sheetmetal versions in the aftermarket. How many of them boost low-midrange torque? None! They do boost high rpm HP though, but that is the desired rpm range. This is beacause of runner length, shape and plenum volume. I do think that the LSX is a superior intake but for a bolt on car it is not the wisest money spent. That 800.00 would go a long way to a nitrous kit, or even 1/3 of a 12 bolt. If you are already cammed with ported (or aftermarket) heads then it would show its value, but even at that point I think you would be better off with a 90 mm version. Not a flame jusy an opinion.

Sorry to hear about your numbers.

Later,
Bart

Cobraeater
03-30-2004, 04:49 PM
Well, it IS pretty obvious from your grath that your A/F ratio have gone up with the LSX.
If you are saying that your graph is BEFORE the tuning, and tuning didn't change much, then I would still check if, f.e., the timing is right. Why don't you post the graph after tuning?

Here's the graphs from LS1 Edit.
http://www.cobraeater.cz28.com/cgi-bin/i/images/LS1%20Edit%201.jpg

http://www.cobraeater.cz28.com/cgi-bin/i/images/LS1%20Edit%202.jpg

As you can see by the 13-15 run the a/f was around 13.0 and the hp and torque was the same as before the tuning. :bang:

So tuning didn't help.

Revelation222
03-30-2004, 06:28 PM
Here's the graphs from LS1 Edit.
http://www.cobraeater.cz28.com/cgi-bin/i/images/LS1%20Edit%201.jpg

http://www.cobraeater.cz28.com/cgi-bin/i/images/LS1%20Edit%202.jpg

As you can see by the 13-15 run the a/f was around 13.0 and the hp and torque was the same as before the tuning. :bang:

So tuning didn't help.

Good lord, that has got to suck after all of that trouble. Sorry to hear that, bro. Lets hope you see the gains later, after cam and/or heads. But how would we really know you gained anything extra over the LS6 then either. :(

GrannySShifting
03-30-2004, 08:21 PM
it looks like it actually lost a tiny bit of low end. We had dissapointing results with one as well