SLP LS6 Intake vs. Holley LS1 Intake
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SLP LS6 Intake vs. Holley LS1 Intake What are the differences between the plastic SLP LS6 intake (the one with the ERG Provision) and the aluminum holley-lingenfelter LS1 intake as far as performance gains go.
I can get either one for basically the same exact price, and I have heard you can port match the holley intake to your heads (for when I get aftermarket ones in the spring). I also use a dry system which shoots the nitrous through the intake and have heard the holley is smoother.
I am wondering if the performance gains straight out of the box would be similar, or if the holley is just an aluminum version of the regular LS1 intake.
Thanks
TECH Junkie
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From: Houston, TX
Re: SLP LS6 Intake vs. Holley LS1 Intake Go with the Holley-Ive heard thats its better than the regular one plus if you have nitrous then it may hold up better-and port match when you get aftermarket heads. 
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Re: SLP LS6 Intake vs. Holley LS1 Intake
i heard the holly hold a lot lot more heat compaird to the composite ls1 and ls6 intake
Re: SLP LS6 Intake vs. Holley LS1 Intake There are actually 3 variants to the LS6 intake. I cant mention the person who flow compared the 3 intakes due to product developement, but i can tell you that the LS6 intake found on the F cars out flows the SLP and the intake found on C5 cars. Why i dont know, but trust me its right. The highflowing ones 4th to last digit is a 1, the others i believe are 3
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Re: SLP LS6 Intake vs. Holley LS1 Intake
There are actually 3 variants to the LS6 intake. I cant mention the person who flow compared the 3 intakes due to product developement, but i can tell you that the LS6 intake found on the F cars out flows the SLP and the intake found on C5 cars. Why i dont know, but trust me its right. The highflowing ones 4th to last digit is a 1, the others i believe are 3
So I'm assuming that your vote would be for the holley then?
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Re: SLP LS6 Intake vs. Holley LS1 Intake sorry for the confusion, im not going to vote, im only telling you that if you are going to buy an LS6 intake, get the one that cam off of a 01-02 fbody car, not the slp, not the C5.
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From: New York
Re: SLP LS6 Intake vs. Holley LS1 Intake
sorry for the confusion, im not going to vote, im only telling you that if you are going to buy an LS6 intake, get the one that cam off of a 01-02 fbody car, not the slp, not the C5.
Re: SLP LS6 Intake vs. Holley LS1 Intake
sorry for the confusion, im not going to vote, im only telling you that if you are going to buy an LS6 intake, get the one that cam off of a 01-02 fbody car, not the slp, not the C5.
Staging Lane
Joined: Feb 2002
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From: Norfolk VA
Re: SLP LS6 Intake vs. Holley LS1 Intake The intake will heat soak when you stop the car. Here is a question, how fast is the air traveling at WOT passing though the intake? So how long does it stay in the intake. Or better yet, how much air ever touches the walls of the intake and how much heat can it pick up in that amount of time?
If you want to port match the intake go with the Weiand intake. If you want to save a few pounds off the front of the car then use the LS6 intake or wait for one of the other intakes that might be coming out.
I am happy with mine.
If you want to port match the intake go with the Weiand intake. If you want to save a few pounds off the front of the car then use the LS6 intake or wait for one of the other intakes that might be coming out.
I am happy with mine.
Staging Lane
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From: Norfolk VA
Re: SLP LS6 Intake vs. Holley LS1 Intake
which one do you have AG?
When I was on the dyno I was only seeing a few more degrees of air temp than ambient air temp and that with 7psi from the ATI D1-SC blower on a hot NC day too. No bags of ice were killed during my tuning or fans blowing right on the IC's. Just one big fan about 2 feet in front of the car. If you look at the main pic you can see the fan or look around his site there is a couple of cars he has tuned with a pic of the fan Jeff uses Carolina Auto Masters fan pics.
So there was not any "heat soak" going on during my tuning. And you can see my numbers
Not bad out of stock bottom end 
I was told that at WOT the air is moving about 180+mph in the intake tract.
If you are going to have ported heads I would say the Aluminum intake to be able to port match now. Maybe something better will come soon.
Re: SLP LS6 Intake vs. Holley LS1 Intake The Holley has more potential on the large cube motors after it's ported. All the porting on the Holley seems to hurt bottom end torque on stock cubed engines. With port work the Holley can make more power. Without port work it's pretty even with the LS6 on stock cube motor, from the data I saw.
Someone had a GTP ported Holley with coatings that picked up some rwhp over the LS6. I think the bottom end torque was down a little too. I think it was pretty expensive. May be they can add details.
On a stock cube engine I don't think it will make much difference. If the Holley is ported the torque will most like be hurt on the stock cube engine. I'd stick with the LS6 or wait on the LSX.
Someone had a GTP ported Holley with coatings that picked up some rwhp over the LS6. I think the bottom end torque was down a little too. I think it was pretty expensive. May be they can add details.
On a stock cube engine I don't think it will make much difference. If the Holley is ported the torque will most like be hurt on the stock cube engine. I'd stick with the LS6 or wait on the LSX.
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From: Troy, AL
Re: SLP LS6 Intake vs. Holley LS1 Intake "When I was on the dyno I was only seeing a few more degrees of air temp than ambient air temp"
Do you mean that your IAT sensor was reading only a few degrees warmer than ambient? If so, why would someone expect it to read higher due to heatsoak...the IAT sensor is before the intake manifold. Or is that not the case with your car?
Do you mean that your IAT sensor was reading only a few degrees warmer than ambient? If so, why would someone expect it to read higher due to heatsoak...the IAT sensor is before the intake manifold. Or is that not the case with your car?
Staging Lane
Joined: Feb 2002
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From: Norfolk VA
Re: SLP LS6 Intake vs. Holley LS1 Intake "When I was on the dyno I was only seeing a few more degrees of air temp than ambient air temp"
Do you mean that your IAT sensor was reading only a few degrees warmer than ambient? If so, why would someone expect it to read higher due to heatsoak...the IAT sensor is before the intake manifold. Or is that not the case with your car?
Do you mean that your IAT sensor was reading only a few degrees warmer than ambient? If so, why would someone expect it to read higher due to heatsoak...the IAT sensor is before the intake manifold. Or is that not the case with your car?
I have a blower on my car. But you have a good point about the location of the IAT. I know on my L98 it was in the intake manifold. On a ATI setup it's in the box before the MAF. But moving IAT to the intake is interesting idea for more accurate temp readings or drill and tap a thermal probe port in the intake.
When it's running the intake is cool to the touch, if you shut down the engine then it will heat soak, and once you start it up the air passing though it will draw the heat away, but how many of us start the car and got to WOT with in a few seconds? I will see if I can remember to take a few temp readings on the intake this weekend. Start, when I get to the local hangout, at idle there, after shutdown plus 10 minutes, then start it and see how fast it cools down again. Yes I understand as it's running it's pulling heat out of the intake to cool it down, but at some point it will stabilize at temp between engine temp and ambient air temp. I will see if I can take readings from a friend's car with a stock intake to compare to. Also as it's getting hotter, the coolant and heads are giving up heat that would otherwise be there.
As for losing low end TQ, @ 2700 rpm my TQ went from 300 to 354. Granted that I have the D1-SC on there, but it's not making boost at that RPM. I have installed a set of Mac headers and the intake also a small blower cam.
I did run into a problem with the LS6 valley cover mod, the intake did not seat well. Nothing a die grinder could not take care of
I would still like to hear how long a molecule of O2 stays in the intake @ WOT. What is the distance between TB opening and the end of runner #8. Any one know how fast the air is moving in there or the distance?
I also understand if I were NA it would be a better example.
Staging Lane
Joined: Feb 2002
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From: Norfolk VA
Re: SLP LS6 Intake vs. Holley LS1 Intake My tuner "The Milkman" owner of CAM. Read this thread and shot me this via IM So we have some hard data on the intake temps.
I checked your intake manifold temps with a pyrometer and they matched the IAT reported by EFIlive and cooled off rather quickly.
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Re: SLP LS6 Intake vs. Holley LS1 Intake Okay, so basically what you guys are saying here, is that the aluminum holley intake will not present much higher temps during normal operation then a regular LS6 or LS1 intake.
As far as peformance goes, however ... do you think the holley would provide any higher numbers then the regular LS6 intake would? I ordered the Holley intake already, but now I just want the knowledge. As I said, I got the holley brand new for less money then a standard LS6 intake goes for, so even if they are dead equal I am happy.
As far as peformance goes, however ... do you think the holley would provide any higher numbers then the regular LS6 intake would? I ordered the Holley intake already, but now I just want the knowledge. As I said, I got the holley brand new for less money then a standard LS6 intake goes for, so even if they are dead equal I am happy.