lids, lids, lids.....
There hasn't been much talk about lids in a while.
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Joined: Dec 1999
Posts: 303
Re: This is for the purpose of discussion
Mister Will,
In all of this, I am only talking about M6s. I again make that distinction..if you see a dyno #, look at the transmission. I've been looking at signatures on these message boards for a few years now (since I became a lurker in early '99), and I feel I have a good handle on what to expect. But it's just a feel.
My car ran 108 mph when it was stock, so whatever it was making was adequate. It was more than 280. I dyno'd the 323 rwhp in 104 degree weather in July and with lower rear end gears. M6 LT1s start out with 255 rwhp or so..my brother's M6 LT1 SS has an SLP two on the left exhaust standard, so it was probably over 260 rwhp stock. At the same track where I was running my LS1, I could only get his car to trap 100-101 mph. Race weight was 3485 without driver. Weather was slightly better for the LS1's runs. There's a HP difference there, and it's more than just 20 rwhp. And the heavier stock M6 LS1 TAs (two of them) that I've driven have run 106-107 mph in the 1/4.
I do think your stock intake was a bottle neck, though...for whatever reason. Now you're up to a decent amount..I'd expect 310 rwhp (a 12 rwhp gain), and you have 308 rwhp. Our figures are now aligned
But we got to them in different ways. I don't think my car would have gained 26 rwhp from a FIPK.
peace
In all of this, I am only talking about M6s. I again make that distinction..if you see a dyno #, look at the transmission. I've been looking at signatures on these message boards for a few years now (since I became a lurker in early '99), and I feel I have a good handle on what to expect. But it's just a feel.
My car ran 108 mph when it was stock, so whatever it was making was adequate. It was more than 280. I dyno'd the 323 rwhp in 104 degree weather in July and with lower rear end gears. M6 LT1s start out with 255 rwhp or so..my brother's M6 LT1 SS has an SLP two on the left exhaust standard, so it was probably over 260 rwhp stock. At the same track where I was running my LS1, I could only get his car to trap 100-101 mph. Race weight was 3485 without driver. Weather was slightly better for the LS1's runs. There's a HP difference there, and it's more than just 20 rwhp. And the heavier stock M6 LS1 TAs (two of them) that I've driven have run 106-107 mph in the 1/4.
I do think your stock intake was a bottle neck, though...for whatever reason. Now you're up to a decent amount..I'd expect 310 rwhp (a 12 rwhp gain), and you have 308 rwhp. Our figures are now aligned
But we got to them in different ways. I don't think my car would have gained 26 rwhp from a FIPK. peace
Registered User
Joined: Jan 2003
Posts: 7
From: Pekin, IL
I'm by no means am an expert here, but since the aftermarket lids and FIPK allow more airflow resulting in greater horsepower.
On any of the dyno's I've ever been on I was not getting the benefit of 60MPH + winds in order to accurately read the full benefits of the lid or FIPK on dyno compared to actually driving on the street. I think several of the lids, etc.. give you what increases you should be getting when above a certain speed. It was even stated earlier that the FIPK causes more of a RAM AIR effect than lids
So, I am with Chris here that something else must have happened. - (a bad reading or readings at some point, like "MR WILL" said his air filter could have been clogged resulting in some low initial readings) in order to achieve the full claimed HP (26hp) without the benefit of the high MPH winds. Without the winds how is the RAM AIR effect going to be introduced to the engine. IMHO.
On any of the dyno's I've ever been on I was not getting the benefit of 60MPH + winds in order to accurately read the full benefits of the lid or FIPK on dyno compared to actually driving on the street. I think several of the lids, etc.. give you what increases you should be getting when above a certain speed. It was even stated earlier that the FIPK causes more of a RAM AIR effect than lids
So, I am with Chris here that something else must have happened. - (a bad reading or readings at some point, like "MR WILL" said his air filter could have been clogged resulting in some low initial readings) in order to achieve the full claimed HP (26hp) without the benefit of the high MPH winds. Without the winds how is the RAM AIR effect going to be introduced to the engine. IMHO.
Registered User
Joined: Jan 2003
Posts: 36
With my SLP lid and Supersucker ram air I gained 24 rwhp. Here's a link for the Supersucker.
www.lmperformance.com/1858/1.html
www.lmperformance.com/1858/1.html
Registered User
Joined: Jul 2002
Posts: 339
From: San Diego, CA, USA
Re: Re: This is for the purpose of discussion
Originally posted by ChrisLS1Bird
Mister Will,
In all of this, I am only talking about M6s. I again make that distinction..if you see a dyno #, look at the transmission. I've been looking at signatures on these message boards for a few years now (since I became a lurker in early '99), and I feel I have a good handle on what to expect. But it's just a feel.
My car ran 108 mph when it was stock, so whatever it was making was adequate. It was more than 280. I dyno'd the 323 rwhp in 104 degree weather in July and with lower rear end gears. M6 LT1s start out with 255 rwhp or so..my brother's M6 LT1 SS has an SLP two on the left exhaust standard, so it was probably over 260 rwhp stock. At the same track where I was running my LS1, I could only get his car to trap 100-101 mph. Race weight was 3485 without driver. Weather was slightly better for the LS1's runs. There's a HP difference there, and it's more than just 20 rwhp. And the heavier stock M6 LS1 TAs (two of them) that I've driven have run 106-107 mph in the 1/4.
I do think your stock intake was a bottle neck, though...for whatever reason. Now you're up to a decent amount..I'd expect 310 rwhp (a 12 rwhp gain), and you have 308 rwhp. Our figures are now aligned But we got to them in different ways. I don't think my car would have gained 26 rwhp from a FIPK.
peace
Mister Will,
In all of this, I am only talking about M6s. I again make that distinction..if you see a dyno #, look at the transmission. I've been looking at signatures on these message boards for a few years now (since I became a lurker in early '99), and I feel I have a good handle on what to expect. But it's just a feel.
My car ran 108 mph when it was stock, so whatever it was making was adequate. It was more than 280. I dyno'd the 323 rwhp in 104 degree weather in July and with lower rear end gears. M6 LT1s start out with 255 rwhp or so..my brother's M6 LT1 SS has an SLP two on the left exhaust standard, so it was probably over 260 rwhp stock. At the same track where I was running my LS1, I could only get his car to trap 100-101 mph. Race weight was 3485 without driver. Weather was slightly better for the LS1's runs. There's a HP difference there, and it's more than just 20 rwhp. And the heavier stock M6 LS1 TAs (two of them) that I've driven have run 106-107 mph in the 1/4.
I do think your stock intake was a bottle neck, though...for whatever reason. Now you're up to a decent amount..I'd expect 310 rwhp (a 12 rwhp gain), and you have 308 rwhp. Our figures are now aligned
But we got to them in different ways. I don't think my car would have gained 26 rwhp from a FIPK. peace
Well, Well, your rims are UGLY!!! Alright outta the car, right here, right now!
Just KIddING Hah, hah
Hey Chris LS1Bird, howz it going
I understand what you are saying. I am not suggesting that your HP numbers are not good. Also your quarter mile time are some of the best I've seen for the description in your sig. You must have that 1/4 mile run down pat
However, I don't feel that 280 rwhp should be considered weak output for a stock LS1. I realize what you are saying about the M6 tranmission and an automatics drag. But I think to expect 300 rwhp from every LS1 is overly optimistic. Now I'm talking about pre- '01 LS1 here.
Since the introduction of the LS6 manifold LS1s, 300 rwhp isn't uncommon. But before that it was something to brag about.
With any mass manufactured assembly, there will be variances. With engines this affects the power output. Some will be on the high end, others, the low end. For '98 -'00 LS1 300 rwhp is the high end. This variance is the reason racing teams tear every new engine down and blueprint them.
In reference to 1/4 mile times as measure of power. Well the 1/4 mile is really a measure of acceleration not power. You said so yourself, the higher rearend gears reduced your rwhp number but they increase your 1/4 mile times. Do drag radials increase your power output. No, but they improve your times, don't they.
I just pulled out an old article from Motor Trend Feb. 1998. In this article they were comparing a '98 Z28, a '98 Formula Firebird and a '98 Mustang Cobra. The article also did some runs on a dynojet dyno. Making a long story short the Z28 produced 282 rwhp. Now do you think Chevy would send a weak LS1 to a magazine to be compared to, of all things, a high end Mustang. In fact companies are usually expected to send an exceptional ringer.
People will say that getting more than 20 rwhp out of a K&N FIPK is unrealistic. Yet it got 26 rwhp on my car
Is it on the high end of expectation? yeah. Can everyone expect to see 26 rwhp with it installed? Probably not.Hope you saw the humor in the first few lines.
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