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Plastic intakes for carb option LSX?

Old 11-17-2014, 08:41 AM
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Default Plastic intakes for carb option LSX?

Any available?
Old 11-18-2014, 07:22 PM
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only plastic intake ive seen for a carb is the AFR titan for first gen sbc's
Old 11-19-2014, 05:39 AM
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Surprised. I thought that polymer intake has distinct advantages over metal in terms of lower temperatures leading to denser air/fuel mix.
Old 11-19-2014, 06:21 AM
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Evidently not since the market has not made it a big deal. Sheet metal seems to be where it's at.
Old 11-19-2014, 06:31 AM
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For carb metal would be better as the fuel cools the intake
Old 12-03-2014, 04:25 AM
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Wonder y Afr doesn't make an ls version. Ls have been the hottest thing for a few yrs. Now.
Don't look like its slowing down anytime soon.
Old 12-03-2014, 07:04 PM
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Originally Posted by NemeSS
Wonder y Afr doesn't make an ls version. Ls have been the hottest thing for a few yrs. Now.
Don't look like its slowing down anytime soon.
$$$$ and return on that investment
Old 12-03-2014, 09:28 PM
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Originally Posted by Doug G
$$$$ and return on that investment
Yep. Aluminum carb intakes are cheap! Plastic intakes aren't. It's hard to convince people to pay 2x as much for what is possibly very similar performance.
Old 12-05-2014, 10:53 AM
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Originally Posted by dogsballs
For carb metal would be better as the fuel cools the intake
Uh huh...Most people don't know that..
Old 12-05-2014, 04:04 PM
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Originally Posted by WE TODD DID
Uh huh...Most people don't know that..

That's because it's not exactly the case. Although, it may have a slight cooling effect on the intake, it is the cooler charge that is beneficial from intakes that dispense fuel in the standard carb location on the intake. Touching an aluminum carb intake after the engine reaches operating temp will confirm that fuel does not cool the intake to any amount that makes it more beneficial over an intake made from plastic. The aluminum intake will still be much hotter than a plastic intake. The charge, however, will be cooler because of where the fuel enters the intake. Similar cooling effect as a water injection system.

Sheet metal intakes are best most likely due to their overall better efficiency.
Old 12-07-2014, 09:37 AM
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The other benefit and price justification for the plastic intakes is the finish work inside from the smooth mold. That and the fact it is 2 pc. and gives some flexibility during manufacturing

Most a/m aluminum intakes need alot of grinding and cartridge rolling to get to a decent finished product. That is worth the extra $$$ if you are looking to make optimum power.

I ran a Titan on my Gen 1 SBC with AFR heads. It was a nice package and made good power. Out of the box the port match was dead on to their heads and the runner and plenum work was that of a good port job.

There would be a market in the LS world IMO, the intakes already don't have coolant to deal with, unlike the Gen 1 SBC. Plus most of this crowd is already use to 'plastic'.
Old 12-07-2014, 10:52 AM
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This would be cool to where you could bolt on a factory throttle body.
Old 12-13-2014, 09:47 PM
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Originally Posted by LS1-450
That's because it's not exactly the case. Although, it may have a slight cooling effect on the intake, it is the cooler charge that is beneficial from intakes that dispense fuel in the standard carb location on the intake. Touching an aluminum carb intake after the engine reaches operating temp will confirm that fuel does not cool the intake to any amount that makes it more beneficial over an intake made from plastic. The aluminum intake will still be much hotter than a plastic intake. The charge, however, will be cooler because of where the fuel enters the intake. Similar cooling effect as a water injection system.

Sheet metal intakes are best most likely due to their overall better efficiency.
Sure it is. I've done more testing with different types of induction systems just in the past year than most will ever do in a lifetime. Touch that aluminum intake after you make a WOT pull and it will be cool to the touch. That's a fact. The plastic intakes just aren't really any better, which is why they aren't really out there.

Last edited by WE TODD DID; 12-13-2014 at 09:55 PM.
Old 12-14-2014, 03:35 AM
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Originally Posted by WE TODD DID
Sure it is. I've done more testing with different types of induction systems just in the past year than most will ever do in a lifetime. Touch that aluminum intake after you make a WOT pull and it will be cool to the touch. That's a fact. The plastic intakes just aren't really any better, which is why they aren't really out there.

OK, so go run a road course for 20 minutes & make a WOT pull (for the fact tested cooling effect) just before pitting. Park, open the hood & grab the intake w/ a bare hand. Gonna be better off throwing a couple of hot dogs on that sucker, but go ahead, grab it. Not everything can be confirmed on a dyno.

Am not disputing the cooling effect of the charge. The fact that an intake is cooler to the touch on a dyno after a WOT pull further confirms the cooling effect of the charge.
Old 12-14-2014, 07:42 PM
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Originally Posted by LS1-450
OK, so go run a road course for 20 minutes & make a WOT pull (for the fact tested cooling effect) just before pitting. Park, open the hood & grab the intake w/ a bare hand. Gonna be better off throwing a couple of hot dogs on that sucker, but go ahead, grab it. Not everything can be confirmed on a dyno.

Am not disputing the cooling effect of the charge. The fact that an intake is cooler to the touch on a dyno after a WOT pull further confirms the cooling effect of the charge.
Just simply make the manifold where it isn't a heat sync, and you have a winner
Old 12-17-2014, 03:40 PM
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I talked to the guys in the AFR booth about this at PRI. They did not seem very inspired by the idea of making a plastic carb intake for an LS1.


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