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Old 04-03-2009, 11:01 PM   #1 (permalink)
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LSx Intake tube?

I'm workin on a customers jeep right now and I've got the same problem that I ran into on another vehicle a while back. It's a 5.3 Vortec, and the throttle body aims straight out the front of the motor and I cant figure out a way to get the MAF and filter to fit. I was thinkin that I could use a 4" steel mandrel bend to put the filter and MAF over the top of one of the valve covers, but even with the tightest bend radius the tube would still be into the radiator. I only have about 7" from the TB to the Radiator to work with.

I'm sure some of you have had this issue before, what did you use for an intake tube? I really need some kinda elbow thats fairly flat, but I haven't been able to find anything that'll work.
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Old 04-03-2009, 11:06 PM   #2 (permalink)
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Mckenzie's has pretty tight rubber elbows
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Old 04-03-2009, 11:10 PM   #3 (permalink)
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wouldn't happen to know the dimensions on one of those would you? There's no specs and no photo there, so hard to tell if it'd work.
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Old 04-03-2009, 11:49 PM   #4 (permalink)
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intakehoses.com

7" is alot of room These work, you can trim them and fit them in about 4".

http://intakehoses.com/Merchant2/mer...gory_Code=CHEW
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Old 04-04-2009, 12:49 AM   #5 (permalink)
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Fuck yeah! that's just what I was looking for. Thanks!
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Old 04-04-2009, 05:44 AM   #6 (permalink)
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Fuck yeah! that's just what I was looking for. Thanks!
you can get those locally
Donaldson sells them, and they have a pdf catalogue on their site to get pn from
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Old 04-04-2009, 05:58 AM   #7 (permalink)
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We used a stainless J-tube on my and cut it back to sit the air filter right on the intake. We also had to do a cowl CJ hood...
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Old 04-04-2009, 11:00 AM   #8 (permalink)
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If you're not opposed to spending some coin on a little bling, Street & Performance (hotrodlane.com) has some pretty sweet air filters with the maf built into them. I put one on Mom's junk. You can kinda see it here, it's got a rag and 2x4 in front of it holding up the rad.
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Old 04-04-2009, 12:36 PM   #9 (permalink)
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I just built an intake on a force fed LS desert car that had about 4-1/2" between the intake and back of the radiator fans. I used a super tight (~2.5" CLR on a 4" ID tube!) blue silicone 90* out of the throttle body and built a 4" aluminum intake to the filter housing.

The last "tight" 4" 90*s I got from McKenzies weren't very tight at all, probably around 3 or 3.5" CLR. I have had better luck getting the really tight ones (2.5" CLR) from Butches in Vegas.

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Old 04-06-2009, 09:33 AM   #10 (permalink)
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Quote:
Originally Posted by rock mafia View Post
intakehoses.com

7" is alot of room These work, you can trim them and fit them in about 4".

http://intakehoses.com/Merchant2/mer...gory_Code=CHEW
I'll second www.intakehoses.com
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Old 04-06-2009, 09:37 AM   #11 (permalink)
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What about using a reducer to put the MAF right on the throttle body and the filter right on the MAF? I know I've seen it. Where do I get that reducer?
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Old 04-06-2009, 12:22 PM   #12 (permalink)
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What about using a reducer to put the MAF right on the throttle body and the filter right on the MAF? I know I've seen it. Where do I get that reducer?
I have an LS1 with truck pulleys and the truck intake. Straight out gets me into that top idler pulley and radiator. Right angle would have gotten me into my upper radiator hose.

I used a 45 degree Rubber Elbow and Reducing Insert from www.intakehoses.com from TB to MAF, then attached my K&N directly to the MAF.
Because the TB is a 4" OD and the MAF is 3.75" OD.

40R375 Reducing Insert 4" OD to 3.75" ID $8.59
1845L40 Rubber Elbow 4" ID X 45 Degree $14.40

The K&N I came up with was the 599-RU-4250 which is short and 3.75" ID to slip over the MAF from Jegs for $38.99
JEGS
Flange Dia.- F: 3.75'', 95 mm
Base Outside Dia.: 5.375'', 137 mm
Top Outside Dia.: 4.375'', 111 mm
Length- L: 5'', 127 mm
Top Style: Rubber
Flange Length-FL: 0.625'', 16 mm
Flange Angle-FA: 0
Flange Offset: 0''


Here is mine before I replaced an accordian stock style with the Intake Hoses elbow, but it is identical except now rather than accordian looking it is smooth thick rubber, and overall OD is smaller. I found that the accordian style would still move just enough to hit that top idler pulley and had worn a hole in the bottom of it.

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Old 04-06-2009, 12:37 PM   #13 (permalink)
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Thanks that helped!
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Old 04-06-2009, 01:03 PM   #14 (permalink)
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intakehoses.com

7" is alot of room These work, you can trim them and fit them in about 4".

http://intakehoses.com/Merchant2/mer...gory_Code=CHEW

I just ordered some stuff from them to make a (don't laugh) 5.7 TBI cold air intake. Good quality stuff and they shipped it quick as shit. Talking to the guy it seemed like they could get a whole bunch of stuff that wasn't listed.
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Old 04-06-2009, 02:10 PM   #15 (permalink)
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you need a cobrahead.
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Old 04-06-2009, 02:26 PM   #16 (permalink)
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What about using a reducer to put the MAF right on the throttle body and the filter right on the MAF? I know I've seen it. Where do I get that reducer?

got mine from intakehoses.com Part # 90hl40r35, reducing elbow 90 degree 4"ID to 3.5"ID about $17 with shipping $24.44
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Old 04-06-2009, 03:17 PM   #17 (permalink)
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got mine from intakehoses.com Part # 90hl40r35, reducing elbow 90 degree 4"ID to 3.5"ID about $17 with shipping $24.44
What did your 3.5" MAF come out of?
I looked for a smaller one for a little while thinking I could fit it a little better.
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Old 04-06-2009, 04:08 PM   #18 (permalink)
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If you're not opposed to spending some coin on a little bling, Street & Performance (hotrodlane.com) has some pretty sweet air filters with the maf built into them. I put one on Mom's junk. You can kinda see it here, it's got a rag and 2x4 in front of it holding up the rad.
Nice find, I'm about to pony up and order one, it will make my whole intake situation a lot easier.

Question, how do these motors run if the mass air sensor dies? I don't think I'd be able to run to the parts store for a a replacement sensor that would go into this unit if I had problems at a race/competition.

I thought I was having MAFS problems last year at a comp and found the mafs had come disconnected, but I was also having problems with a clogged fuel filter so I don't know if it was lack of mafs or lack of fuel that was making the motor run like total shit(completely un drivable). If I could still finish a comp if the sensor died I'm ready to order this.
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Old 04-06-2009, 04:14 PM   #19 (permalink)
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Fiber Tech in El Cojin SP? Has the short one in stock..... It is only like 4" Cobra
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Old 04-06-2009, 06:34 PM   #20 (permalink)
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3.5 maf is on ls1s stock
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Old 04-06-2009, 08:58 PM   #21 (permalink)
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3.5 maf is on ls1s stock
ummmm I get that.....

Every GM LS MAF I have laid hands on is 3.75", I know there are 3.5"s out there so what did they come on? Certain trucks? Certain year camaro's?
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