I just read an article about a modification to the stock intake on a TBI engine. Basically the writer of the article (magazine)
claimed he cut out a 3/4 by 1/2 inch deep slot into the top of the intake manifold in between the two holes. He also claimed it gave him approximately 12 hp and better mileage. His theory was that when one side of the engine was firing one side the opposite side of the TBI was not being used so if he cut the slot into the intake it would allow more air through to the side firing. After reading this I remembered the Edelbrock TBI intakes have the same type of slot cut into it. Anyone actually try this?
TBI mods
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markmitchinnh
Topic author - I sleep in my van
- Posts: 589
- Joined: Wed Oct 13, 2010 2:07 pm
- Location: Barrington NH
TBI mods
Recently bought a 1989 Astro RS from Florida. Replaced stock engine witha 1997 5.7 vortec with TBI and replaced transmission with rebuilt 700R4 with mild shift kit.
Bought on Monday the 16th of April 2012
Bought on Monday the 16th of April 2012
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HotrodDaddy43
- I get chills without my van.
- Posts: 51
- Joined: Fri Apr 13, 2012 11:40 pm
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HotrodDaddy43
- I get chills without my van.
- Posts: 51
- Joined: Fri Apr 13, 2012 11:40 pm
Re: TBI mods
From what I've read it does help I don't know about the 12hp but Vic edelbrocks designers sure believe in it.
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doyoulikeithere
- I plan to be buried in my van
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- Joined: Tue Nov 17, 2009 8:27 pm
- Location: Misty Mountains of Cowichan BC.
Re: TBI mods
A lot of the TBI spacer plates have that config as well.
Pretty sure the one I have installed does.
Pretty sure the one I have installed does.
2021 Yamaha Tenere 700 - Blue.
2016 Yamaha XSR900 - Silver.
1990 Astro - AWD - Brown.
1987 Astro - With 5 Speed & 4wd - Silver & Blue.
2016 Yamaha XSR900 - Silver.
1990 Astro - AWD - Brown.
1987 Astro - With 5 Speed & 4wd - Silver & Blue.
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chevymaher
- I finally get the smurf thing
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- Joined: Thu Jan 20, 2011 3:50 pm
90 astro parts van gone.94 safari SLE.68 chevelle SS clone.