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Fast 102 VS LS3

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Old Nov 28, 2016 | 03:47 PM
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Default Fast 102 VS LS3
Looking for some flow data. I recently flowed my new set of LS3 heads.... Also flowed them with the stock LS3 intake bolted to them. I was shocked to see how much cfm was lost with the intake attached. I'm looking for the same data but done with a FAST 102. Basically looking to prove to myself if it's worth buying a FAST.... Having a hard time with accepting leaving all that on the table.
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Old Nov 28, 2016 | 04:31 PM
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I don't have any direct data, but maybe these links will help. You might want to look into the Rick Crawford Racing ported LS3 intake (another vendor was approved to sell the design also but I've forgotten their name) as a less expensive version of the FAST102 with pretty similar, if not better, results for the cost.

http://www.g8board.com/forums/24-pcm...o-results.html

You'll need to interpret the RCR L76/LS3 intake flow number results in the first post:
http://g8nation.com/showthread.php?t=30615&

Post #5:
http://www.corvetteforum.com/forums/...mm-intake.html
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Old Nov 28, 2016 | 06:39 PM
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Originally Posted by JimMueller
I don't have any direct data, but maybe these links will help. You might want to look into the Rick Crawford Racing ported LS3 intake (another vendor was approved to sell the design also but I've forgotten their name) as a less expensive version of the FAST102 with pretty similar, if not better, results for the cost.

http://www.g8board.com/forums/24-pcm...o-results.html

You'll need to interpret the RCR L76/LS3 intake flow number results in the first post:
http://g8nation.com/showthread.php?t=30615&

Post #5:
http://www.corvetteforum.com/forums/...mm-intake.html
Thanks for the links. The intake test was with a Crawford intake as a matter of fact. It still lost a lot of cfm up top and through out.
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Old Dec 3, 2016 | 06:51 PM
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bump for data....
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Old Dec 3, 2016 | 07:01 PM
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Haven't had this intake on the dyno yet but I did test it back to back at the track VS a Rick Crawford manifold. This intake picked up 1.5 mph with no other changes. This intake definitely feels like it has more grunt down low but I worry that the loss of plenum volume will hurt the top with my ported heads that I'm about to install.

Thoughts and input?
Attached Thumbnails Fast 102 VS LS3-1.jpg   Fast 102 VS LS3-8.jpg   Fast 102 VS LS3-9.jpg   Fast 102 VS LS3-10.jpg  
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Old Dec 4, 2016 | 04:20 AM
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I picked up 12-15rwhp and 1mph with Rick Crawford AirRam on our LS3 Monaro.

Interested in what you have done to create a bell mouth.
What type of epoxy are you using?
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Old Dec 4, 2016 | 08:11 AM
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Not sure if they are available for the LS3 port shape, but have you looked into an ITB manifold, such as the Harrop?
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Old Dec 4, 2016 | 09:26 AM
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Originally Posted by Dyno Junkie
I picked up 12-15rwhp and 1mph with Rick Crawford AirRam on our LS3 Monaro.

Interested in what you have done to create a bell mouth.
What type of epoxy are you using?
Originally Posted by BFASTNOTLAST
Haven't had this intake on the dyno yet but I did test it back to back at the track VS a Rick Crawford manifold. This intake picked up 1.5 mph with no other changes. This intake definitely feels like it has more grunt down low but I worry that the loss of plenum volume will hurt the top with my ported heads that I'm about to install.

Thoughts and input?
I got a rick crawford intake it helped put me in the 10's na. It only helps.
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Old Dec 4, 2016 | 03:44 PM
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The data provided was done with a Crawford intake. I have since re-done another intake for more port opening transition which has helped and gained 1.5 mph at the track vs the RCR manifold.

The data I'm looking for is a Fast intake bolted to a set of ported heads to get the CFM loss from the intake alone. I'm not debating the gains of the RCR manifold I have already taken that to the next level and got more performance with the intake above.

Now I'm focused on how to minimize the CFM loss.
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Old Dec 4, 2016 | 03:47 PM
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The data.....
Attached Thumbnails Fast 102 VS LS3-intake-flow.png  
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Old Dec 4, 2016 | 04:27 PM
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Originally Posted by BFASTNOTLAST
The data.....
For which version of the RCR intake is that data? If it's not for the version from RCR, could you post the 'stock' RCR data comparison also?
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Old Dec 4, 2016 | 05:05 PM
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That is the data with the RCR ram-air manifold (rods only). I have since took it a step further with another intake but have not flowed it as its on the car.
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Old Dec 6, 2016 | 07:59 AM
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Bump for input.
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Old Dec 6, 2016 | 09:43 AM
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The ls3 heads flow very similar to stock ls3 heads. Once you port the heads it becomes more of a restriction.

That's where the fast starts to take over. It flows more like ported ls3 heads
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Old Dec 7, 2016 | 09:20 AM
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Originally Posted by big hammer
The ls3 heads flow very similar to stock ls3 heads. Once you port the heads it becomes more of a restriction.

That's where the fast starts to take over. It flows more like ported ls3 heads
Exactly.... Now looking for actual data to back it up.
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Old Dec 13, 2016 | 08:52 AM
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Hope someone can provide you with data. I'm interested.
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Old Dec 15, 2016 | 07:46 AM
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Bump for data

Or someone willing to let me use theirs on the flow bench to provide results....
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Old Aug 1, 2017 | 11:03 PM
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Did you ever find the desired data? You may be interested in this link, starting at post 216.

https://ls1tech.com/forums/generatio...hedrals-6.html
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