Fast vs ported vs z06 intake
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Intermediate
Joined: Nov 2006
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Fast vs ported vs z06 intake
I have an 06, Z51 6m andI've been reading about the discussions on the Fast vs ported intakes-would the Z06 intake fit and if so where would it fit in this discussion. I'm new to this so forgive my ignorance.
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
The C6 Z06 intake will not fit on your LS2, the Z06 LS7 engine has totally different port configuration than that LS2 which is basically the same as a LS6 port from the 2004 and earlier Z06 engines. You can have the stock LS2 intake ported by someone like LPE, LS2 Portworks or others. I personally don't think that there is much more gain between a ported LS2 and a 90mm FAST. Not to mention that you need to perform some surgery on the body panel directly behind the intake to make the FAST 90mm to fit into a C6
Burning Brakes
Joined: Sep 2004
Posts: 922
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From: Dallas TX
Ls7 intake will not fit.
The Fast 90 will need some notching being made to fit, the gains are worth it with a nice amount of mods. The Fast 90 is not something i would do unless i had a nice size cam and supporting mods.
The Fast 90 will need some notching being made to fit, the gains are worth it with a nice amount of mods. The Fast 90 is not something i would do unless i had a nice size cam and supporting mods.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
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From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
In the above graph the only difference was the manifolds. 9rwhp and 17rwtq is the difference if you mistakenly reduce the numbers to what is at peak. The power differences in the midband are staggering by comparrison to peak numbers. The top line is the FAST and LG headers with a tune and the botom is a ported LS2 with no other changes. The cost is roughly 80-90 bucks per HP so H/C guys looking for more will opt to say that the difference is worth it. If you are doing only a few mods and dont care about getting to the best attainable than I guess the values you hold to will be evaluated differently. Money aside there is a difference.
Keep in mind as posted about previously, peak power doesnt tell the story about the FAST manifold. The gains in the midband are much more impressive but still the difference for the uninformed customer will still unfortunatly be the peak only numbers. They will still say the difference is "only 9hp" when in reality the above graph tells a very different story at 5000rpms being more than 20rwhp over the LS2. A ported LS2 is an accountant's choice, a ported FAST is a mechanic's choice.
Last edited by SpinMonster; Mar 4, 2007 at 02:50 PM.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
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From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
The FAST as a stand alone mod gives better gains in the midband as some headers do. I personally did the fast after the headers and thought it gave much better gains than headers.
In this graph the heads and cam are stock and the only mods were headers and a tune. The peak gains again do not show the true nature of the power gains as seen in the midband. The manifld without heads, cam, and other supporting mods is simply one of the strongest mods you can do. Other than headers, what else gains nearly 20+rwtq and HP in the midband? Gains in the 4500-5000 rpm range are stronger than at peak.
I differ in opinion here as to it needing other mods.
Last edited by SpinMonster; Mar 4, 2007 at 03:00 PM.
Burning Brakes
Joined: Sep 2004
Posts: 922
Likes: 0
From: Dallas TX
The FAST as a stand alone mod gives better gains in the midband as some headers do. I personally did the fast after the headers and thought it gave much better gains than headers.
In this graph the heads and cam are stock and the only mods were headers and a tune. The peak gains again do not show the true nature of the power gains as seen in the midband. The manifld without heads, cam, and other supporting mods is simply one of the strongest mods you can do. Other than headers, what else gains nearly 20+rwtq and HP in the midband? Gains in the 4500-5000 rpm range are stronger than at peak.
I differ in opinion here as to it needing other mods.
In this graph the heads and cam are stock and the only mods were headers and a tune. The peak gains again do not show the true nature of the power gains as seen in the midband. The manifld without heads, cam, and other supporting mods is simply one of the strongest mods you can do. Other than headers, what else gains nearly 20+rwtq and HP in the midband? Gains in the 4500-5000 rpm range are stronger than at peak.
I differ in opinion here as to it needing other mods.
That is a pretty good result. I was under the impression that you wouldnt gain anything unless you a heavy amount of mods. You proved me wrong, great evidence.
Burning Brakes
Joined: Feb 2006
Posts: 926
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The surgery is minor and the power difference is documented by LG:
In the above graph the only difference was the manifolds. 9rwhp and 17rwtq is the difference if you mistakenly reduce the numbers to what is at peak. The power differences in the midband are staggering by comparrison to peak numbers. The top line is the FAST and LG headers with a tune and the botom is a ported LS2 with no other changes. The cost is roughly 80-90 bucks per HP so H/C guys looking for more will opt to say that the difference is worth it. If you are doing only a few mods and dont care about getting to the best attainable than I guess the values you hold to will be evaluated differently. Money aside there is a difference.
Keep in mind as posted about previously, peak power doesnt tell the story about the FAST manifold. The gains in the midband are much more impressive but still the difference for the uninformed customer will still unfortunatly be the peak only numbers. They will still say the difference is "only 9hp" when in reality the above graph tells a very different story at 5000rpms being more than 20rwhp over the LS2. A ported LS2 is an accountant's choice, a ported FAST is a mechanic's choice.
In the above graph the only difference was the manifolds. 9rwhp and 17rwtq is the difference if you mistakenly reduce the numbers to what is at peak. The power differences in the midband are staggering by comparrison to peak numbers. The top line is the FAST and LG headers with a tune and the botom is a ported LS2 with no other changes. The cost is roughly 80-90 bucks per HP so H/C guys looking for more will opt to say that the difference is worth it. If you are doing only a few mods and dont care about getting to the best attainable than I guess the values you hold to will be evaluated differently. Money aside there is a difference.
Keep in mind as posted about previously, peak power doesnt tell the story about the FAST manifold. The gains in the midband are much more impressive but still the difference for the uninformed customer will still unfortunatly be the peak only numbers. They will still say the difference is "only 9hp" when in reality the above graph tells a very different story at 5000rpms being more than 20rwhp over the LS2. A ported LS2 is an accountant's choice, a ported FAST is a mechanic's choice.
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Safety Car
Joined: May 2005
Posts: 3,990
Likes: 1
From: Corpus Christi Texas
I'm having issues with my scanner but my ported intake gave me peak gains of 4rwhp and 6rwtq SAE. This was same day, a before and after dyno. However, my best gains came in at 10rwhp and 11rwtq SAE in the mid range. On average, from 3500-5500rpm, the torque averaged about a 10rwtq gain throughout. HP was on average about 4-6rwhp with the biggest gains coming from 4500-5500rpm, averaging about 8-10rwhp. All in all, not great and certainly from the looks of it, nowhere near the output of the FAST inake. My guess is the FAST would put me over the 400rwhp mark without a cam change.
Instructor
Joined: Nov 2003
Posts: 114
Likes: 0
From: Overland Park KS
I am impressed...what all have you done?
I'm having issues with my scanner but my ported intake gave me peak gains of 4rwhp and 6rwtq SAE. This was same day, a before and after dyno. However, my best gains came in at 10rwhp and 11rwtq SAE in the mid range. On average, from 3500-5500rpm, the torque averaged about a 10rwtq gain throughout. HP was on average about 4-6rwhp with the biggest gains coming from 4500-5500rpm, averaging about 8-10rwhp. All in all, not great and certainly from the looks of it, nowhere near the output of the FAST inake. My guess is the FAST would put me over the 400rwhp mark without a cam change.
Like I posted earlier, I am very pleased with the Random Tech cat back, Granetelli MAF, VaraRam CAI, and Predator programmer. AND, that damn annoying light 1-4 IS GONE!
I just wish people would share more custom tuning numbers so we could tweak our cars with the Predators even more. I am considering having Halltech do a custom tune on my C6, especially if I can expect a big pick up. I have an email sent to him and am waiting a reply.
I guess I would like to know what is next? And, the best bang for the buck given what I have done so far.
Last edited by C6 Vette; Mar 4, 2007 at 09:32 PM. Reason: spelling
Safety Car
Joined: May 2005
Posts: 3,990
Likes: 1
From: Corpus Christi Texas
Can you share with us what all you have done to your C6? Mods?
Like I posted earlier, I am very pleased with the Random Tech cat back, Granetelli MAF, VaraRam CAI, and Predator programmer. AND, that damn annoying light 1-4 IS GONE!
I just wish people would share more custom tuning numbers so we could tweak our cars with the Predators even more. I am considering having Halltech do a custom tune on my C6, especially if I can expect a big pick up. I have an email sent to him and am waiting a reply.
I guess I would like to know what is next? And, the best bang for the buck given what I have done so far.
Like I posted earlier, I am very pleased with the Random Tech cat back, Granetelli MAF, VaraRam CAI, and Predator programmer. AND, that damn annoying light 1-4 IS GONE!
I just wish people would share more custom tuning numbers so we could tweak our cars with the Predators even more. I am considering having Halltech do a custom tune on my C6, especially if I can expect a big pick up. I have an email sent to him and am waiting a reply.
I guess I would like to know what is next? And, the best bang for the buck given what I have done so far.
Last edited by bunk22; Mar 4, 2007 at 09:40 PM.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Lets see, I've got the Vararm, Kooks 1 3/4" long-tubes, ported intake, SLP 1.85 rockers, Corsa cat-back and tune. My exact dyno numbers (dynojet) were 397.39rwhp/386.78rwtq SAE. That was after my ported intake install. Earlier that day, my car dynoed 393.19rwhp/380.58rwtq SAE and had been sitting over night so it wasn't right off the street. For me, the best mod, were my headers, followed by my tune then the Vararam. These mods not only showed gains on the dyno but substantial gains at the track (at least the tune and long-tubes did in similar wx conditions).
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
I would also like to thank Dave Busch at Cartek for recently answering all my annoying phone questions. He got a sale out of it too.
