Which intake manifold
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Teching In
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From: Delaware
Which intake manifold Im ready to pull the trigger on an intake. I've been reading threads all day on fast 102 vs msd. It seems that the msd will make more power past 7k. My car is a 99 Camaro with the summit stage 4 cam installed 237/246 113+3, .625/.605 Stock heads and stock ls1 intake. It's been a slow build so I haven't been on the dyno yet. So which intake is right for me?
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One question would be what will the car see the majority of its time. If that is under 6,500 rpm we would recommend the FAST LSXR 102 FST-146302B. If you will be over 7,000 rpm often then the MSD Atomic MSD-2702 is your ticket.
With the FAST intake, you will require some additional parts. You will need gaskets FST-146203-8, a fuel rail kit FST-146032-KIT, and line kit FST-54028-KIT. Running a stock 3 bolt throttle body will require adapter FST-146029-KIT.
The MSD will require additional parts and modifications. You will need to grind down the upper bolt head and boss on your water pump. Or you will need to buy an LS2 ADO-252-846 water pump. Running a stock 3 bolt throttle body you will need the MSD-2709 adapter and throttle cable bracket MSD-2707. You will also need the MSD-2721 fuel rail kit and quick-connect adapter fitting HLY-534-211.
With the FAST intake, you will require some additional parts. You will need gaskets FST-146203-8, a fuel rail kit FST-146032-KIT, and line kit FST-54028-KIT. Running a stock 3 bolt throttle body will require adapter FST-146029-KIT.
The MSD will require additional parts and modifications. You will need to grind down the upper bolt head and boss on your water pump. Or you will need to buy an LS2 ADO-252-846 water pump. Running a stock 3 bolt throttle body you will need the MSD-2709 adapter and throttle cable bracket MSD-2707. You will also need the MSD-2721 fuel rail kit and quick-connect adapter fitting HLY-534-211.
Originally Posted by Turntup_Ls1
Im ready to pull the trigger on an intake. I've been reading threads all day on fast 102 vs msd. It seems that the msd will make more power past 7k. My car is a 99 Camaro with the summit stage 4 cam installed 237/246 113+3, .625/.605 Stock heads and stock ls1 intake. It's been a slow build so I haven't been on the dyno yet. So which intake is right for me?
If you plan to stay stock compression the cam is too big and will be a turd.
That cam will want to shift at 7800. So again, if you do not plan to rev that high, go smaller. If you do plan to rev that high, get your compression up and run the Msd.
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From: Ohio
To make that cam shine you need compression. Please mill your heads to get to 60cc. Use a .041 head gasket. If your heads have the notch, your options are more limited.
If you plan to stay stock compression the cam is too big and will be a turd.
That cam will want to shift at 7800. So again, if you do not plan to rev that high, go smaller. If you do plan to rev that high, get your compression up and run the Msd.
If you plan to stay stock compression the cam is too big and will be a turd.
That cam will want to shift at 7800. So again, if you do not plan to rev that high, go smaller. If you do plan to rev that high, get your compression up and run the Msd.
I'm assuming this was from the low stock compression and the stock head/truck intake manifold combo. The results were fairly interesting either way.
I assumed it would carry much farther since I've had smaller cams carry out another 700 RPM.
I have 2 builds going on right now, both looking to make power over 7k, both using smaller cams than this one.
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Holdener did a test on the stage 4 cam on a stock 5.3 and the power hit a plateau at 6500 and ~475 HP.
I'm assuming this was from the low stock compression and the stock head/truck intake manifold combo. The results were fairly interesting either way.
I assumed it would carry much farther since I've had smaller cams carry out another 700 RPM.
I have 2 builds going on right now, both looking to make power over 7k, both using smaller cams than this one.
I'm assuming this was from the low stock compression and the stock head/truck intake manifold combo. The results were fairly interesting either way.
I assumed it would carry much farther since I've had smaller cams carry out another 700 RPM.
I have 2 builds going on right now, both looking to make power over 7k, both using smaller cams than this one.
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Verdad Gallardo Restricted User
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It will peak at 6500 due to the runner design. You will need shorter runners and sacrifice low end torque to utilize the cams potential. Valvetrain needs to be sorted as well or it will fall on its face. Then you'd need heads that can provide enough airflow and airspeed at these higher rpms. 280cfm won't cut it. You'd need a head that flows at least 300cfm on a 5.3l to spin 7500rpm.
We used a custom short runner intake once that had been spinning to 8600, and put a throttle body adapter on it and a 78mm throttle body.
Power fell off 2000 RPM sooner. Runner length isn't the only factor.
With that being said, has anyone used the new Holley 4150 split intake yet?
$500 with rails seems like a decent price. I'm STRONGLY considering one for my corvette.
Holley will sell you the intake with rails, elbow, and throttle body for $800.
On my current setup, the truck intake is flat from 6800 to 7200 where I shift, and power still isn't falling off.
It looks like it would be a decent intake for a high RPM N/A setup with a 4150 TB.
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You would be amazed how high I've managed to spin long-runner intake manifolds and still make power thanks to a few contributing factors.
We used a custom short runner intake once that had been spinning to 8600, and put a throttle body adapter on it and a 78mm throttle body.
Power fell off 2000 RPM sooner. Runner length isn't the only factor.
We used a custom short runner intake once that had been spinning to 8600, and put a throttle body adapter on it and a 78mm throttle body.
Power fell off 2000 RPM sooner. Runner length isn't the only factor.
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From: Ohio
Your right, but I was assuming the use of a stock style manifold like a fast with a large plenum and the use of a TB that's equal to the size of that of the manifold inlet. A 78mm TB is fairly small and I would imagine it couldnt fill the plenum of the short runner intake fast enough to supply the air demand needed for those high rpms. The stock style manifolds are known to peak at 6500 and depending on the combo could carry it out to 7k or so with a 7200 shift point. Maybe a tad more.
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The nbss? It's a decent intake and like 300 bucks on ebay but doesn't fit in an fbody which is why we pay 1100$ for a fast w/ throttlebody.
Thread Starter
Teching In
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From: Delaware
To make that cam shine you need compression. Please mill your heads to get to 60cc. Use a .041 head gasket. If your heads have the notch, your options are more limited.
If you plan to stay stock compression the cam is too big and will be a turd.
That cam will want to shift at 7800. So again, if you do not plan to rev that high, go smaller. If you do plan to rev that high, get your compression up and run the Msd.
If you plan to stay stock compression the cam is too big and will be a turd.
That cam will want to shift at 7800. So again, if you do not plan to rev that high, go smaller. If you do plan to rev that high, get your compression up and run the Msd.
7800... wouldn't I need arp rod bolts to spin it that high?My 853 heads have the notch but I've been looking at going to a set of aftermarket castings. Or even stage 1 799s
Thread Starter
Teching In
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I wanted to be different and I loved the way the power came on in the big cam cars i had ridden in before
Stage 4 would be a good cam for a 383... with an MSD intake and 11.8:1 CR and some aftermarket ported heads in the 230cc range...
For an LS1 346, I don't love it.
If it were cut on a 110 it would be better for the low compression and bring the IVC down to make more midrange. Otherwise, it's a pretty late IVC for a 3.622" stroke. Would work better on a street driven 383.
For an LS1 346, I don't love it.
If it were cut on a 110 it would be better for the low compression and bring the IVC down to make more midrange. Otherwise, it's a pretty late IVC for a 3.622" stroke. Would work better on a street driven 383.
Last edited by JakeFusion; Nov 9, 2019 at 01:20 PM.
Thread Starter
Teching In
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From: Delaware
I had looked at the pro flow xt but I couldn't find if anyone had run one in an N/a application. I wouldn't mind a little cutting as I only drive the car when it's nice out
BTR Equalizer is good for 7000+ and TSP now has a tunnel ram fabricated intake for the LS1. Either of those would fit without hacking up the car and would make it an absolute turd driving around. But at 7800 it will make power!
And guess what, you don't have enough cam for 7800.
This is just a bad combo all around.
And guess what, you don't have enough cam for 7800.
This is just a bad combo all around.
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BTR Equalizer is good for 7000+ and TSP now has a tunnel ram fabricated intake for the LS1. Either of those would fit without hacking up the car and would make it an absolute turd driving around. But at 7800 it will make power!
And guess what, you don't have enough cam for 7800.
This is just a bad combo all around.
And guess what, you don't have enough cam for 7800.
This is just a bad combo all around.
