Down Draft Intake Manifold
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Joined: Apr 2011
Posts: 89
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Down Draft Intake Manifold
I'm considering installing a 'trumpet style' down draft intake manifold on an LS3. But I'm unsure about the modification needed to install such manifolds? Does it require any changes in wiring & ECM programing ?
Some kits are expensive at around 5k but others are much cheaper at around 1k & even offered at ebay!
I'd appreciate any advice & feedback from members that have installed such manifolds.
Some kits are expensive at around 5k but others are much cheaper at around 1k & even offered at ebay!
I'd appreciate any advice & feedback from members that have installed such manifolds.
Melting Slicks
Joined: Feb 2000
Posts: 3,426
Likes: 568
From: new orleans
Don't know about that one but a competitor at optma challange had the harrop was a nightmare to tune. Depending on what you are trying to accomplish you may want to talk to some of the leading tuners. Good luck!
Advanced
Joined: Mar 2014
Posts: 64
Likes: 4
From: Dallas TX
Stay away from the Chinese knock-offs sold at Speedway motors and on eBay. The throttle shafts are not machined for smooth ball-bearing operation and begin to gall fast. Metal shavings in a new moter every time you rev in. I'm not kidding. I have four of these setups running on street rods and kit cars...Go name brand, avoid the cheap crap.
Best,
Paul
Best,
Paul
Safety Car
Joined: Apr 2007
Posts: 4,460
Likes: 325
From: Houston TX
The down drafts are nice but intakes like the harrop (side) are probably easier to fit under the hood. I've never driven a car with one, but those that have them seem to love them after they are all tuned up.
Safety Car
Joined: May 2011
Posts: 3,582
Likes: 46
From: va
with something like in the image above, the hood and the firewall will need cutting if its going into a corvette c6
harrop sells itb kits engineered to work on ls engines so you dont have to deal with a lot of the issues converting it over, however the cost is high
link to thread with a c5 harrop conversion: https://www.corvetteforum.com/forums...-screened.html
harrop sells itb kits engineered to work on ls engines so you dont have to deal with a lot of the issues converting it over, however the cost is high
link to thread with a c5 harrop conversion: https://www.corvetteforum.com/forums...-screened.html
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Melting Slicks
Joined: Jun 2006
Posts: 2,497
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From: Miami Florida
I would think it can be used with a drive by wire actuator as the dual throttle body dual plenum intakes using fuel injectors.
Tuning should not be so hard ones all the throttles are set identical with attention to detail just bare in mind there is no plenum so no map or mass air flow sensor.
Tuning should not be so hard ones all the throttles are set identical with attention to detail just bare in mind there is no plenum so no map or mass air flow sensor.
