EDITED: Posted the Dyno sheets from page 2 (Thanks Spinmonster!)

Two highly debated topics on here... is the FAST worth it over the Stock ported intake? And the highly debated which header topic. In this review it is the Kooks vs the LG.

Okay, first off let me start by saying thanks to a few people.

First off, Louis and Anthony and the whole group at LG Motorsports. There is no other better shop that takes care of you like these guys do!
They exceed every expectation! I won't take my car anywhere else. I have made the 4 1/2 hour round trip to LG, 3 times in the last month.
That tells you what a great job these guys do!

Second, Thanks go out to Guy (Spinmonster) for his work on my FAST and for his continuing CF guidance and wisdom.

The CAR


The Mods before FAST:
*Vararam VR SC1
*Ported TB
*Ported Stock Intake
*Kooks 1 3/4 headers
*Catless xpipe
*B&B Bullets
*Full Dyno Tune.

Starting pull: 369/361. 94 degrees, with 25% humidity.

First Test: Ported SPINFast 92mm vs. Ported Stock Intake
The only change being made at this current time, which was later on in the day was the SPINFast intake. You will notice that the temperature had increased to almost 104 degrees.

386/381. 104 degrees. Gain of 17hp/20tq

What is even more substantial is that this gain occurs all the way through the band on torque and gradually increases on the hp.
You will notice on the graph that there is a 13hp/17tq gain at 4k and both continually increase all the way to the end of the pull.
Again, bear in mind that this is at 10 degrees hotter which could possibly account for a little more room to gain.

Second Test Kooks 1 3/4 vs. LG 1 3/4
Another highly debated topic.
Many have stated that LG does not make the power up top that the kooks do. Well, I am here to say that is not true.
Changes made: LG 1 3/4 installed, kooks removed.

We now have our starting point at 386/381, which was the peak from the FAST.

The LGs gained 13rwtq and even 4rwhp at peak! But, as many of you know the LGs are know for there midband power.
I think the peak hp gains can be contributed by the lower temperature between the two runs.
But, what can be said is that the LG headers not only gained 20-25rwtq through the miband from 2.5 to nearly 5.5k,
but they also increase hp output by 10rw all the way from the beginning of the pull to nearly 5.5k again! At 5.5k the LG headers level off where the kooks do.

390/394 at 94 degrees. Gain of 4rwhp/13rwtq


Needless to say, I was pretty impressed with the results. Both of these are impressive to me because of the midband increase in power.
I increased 40-45tq throughout the minband with these 2 additions.

Guy (Spinmonster) will be posting the dyno sheets for me so that everyone can get a look at them.

 

LS3 or LS2???
guessing by the breaks it's a z-51???

 

nice looking car btw, are those stirpes decals or painted?

 

WOW! I'm glad I chose the LG's! Now they just need to make a FAST for the L92's!

 

Never mind, forgot about the intake limited to ls2 only...

 

Nice, looking forward to seeing the dyno graphs next to each other. Was a retune done after the swap to LGs?

Be forwarned however of the soon to be made comments about the test being done on LG's dyno.

 

Thanks again! We always try to do our best!


Thank you, from all of us here at LG Motorsports.

 

Louis will chime in... but, there was really no need to tune after swapping the headers. The tune was nearly spot on. The best number was on the 2nd pull.

As soon as Spin gets on. He should post the dyno sheets!

 

They are the GS Vinyl Decal. Very simple, but they look painted on in person! They look great!

 

I think branden will vouch for the fact that I spent a combined 6-7 hours on the dyno with the kooks trying to find lost power over the course of 2 weekends to fix the KR, get the trims in line and really find out why his car was down on power. I swapped the headers, added my cal in and with another hour or so, we go to where we were. We didnt pick up hardly 1-2, if that from 5500-6700, the graphs are identical, but where branden felt it most was from idle to 4k, where we picked up anywhere from 10-25 rwtq. Its a trade off, and I think he is happy.

 

Correct me if I am wrong, but I thought the reason LG headers have 10-25 rwtq more mid-range is easily explained due to the fact the primary tubes are much longer than the Kooks? Or to put it another way, SIZE and LENGTH does matter.

 

Thanks for sharing, this is the same results we've seen time and time again. The LG headers are well made and deadly consistent in their quality. The only thing that I would love to see changed (or offered as an option) is having socket connectors instead of the slip fits to ease disassembly and reassembly for those who need to drop the headers often.

 

 

Interesting. How much KR were you seeing? Was it a bad tune?(I know you were not the original tuner of the vehicle)

 

From my understanding it was *6 of KR and as Louis explained to me the decay rate was very lethargic and the KR was consistent throughout the power band. I was only running 16-19 degrees of timing. I believe that is all fixed now and I am running at 22 degrees of timing or so.

As a side note, before anyone says thats where the power came from which was from fixing the KR and running more timing... that was done prior to the FAST and header switch. I went up on a weekend and Louis worked his magic for countless hours and fixed the KR.

Louis can correct me if I am wrong.

 

I picked him up 6/7 SAE HP/Tq from his old tune which was ridden with KR and fuel trims everywhere, but it was still down on power for what ever reason.

Once the KR was gone and the trims were inline, we were happy(ier). I tried to get the most HP out of it I could, both times with the FAST and the tune only.

I did not know him, but replied ( post# 40 in http://forums.corvetteforum.com/show...356&highlight=) telling him I would look at it because I too was baffled. And still baffled when I was done tuning it the first time...

 

I'm glad you mentioned that because that is exactly where I was going with it. I wasn't going to try discrediting them, just sort of playing devil's advocate. Good numbers. The dyno sheets will be interesting.

I remember that thread. Any idea what the issue was?

 

I figured thats where you were going!

If spin would get online, he will post them!

 

Was I that obvious? Sometimes I like to ask the controversial questions before the haters do. I do it without disrespect or attitude so hopefully factual data can be obtained and the conversation doesn't have to turn into a sh*t fest.

Kind of take the wind out of their sales before they get going

 

Like to see the grafts. Really kinda hard to say with HP claims, when the LG's had 10 degree's cooler to work with. The 10 degree's cost at
least 1 percent. TQ is be gonna more too. Don't mean to rain on the parade!