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Anyone run Clifford performance shorty headers?

Moderator: Mod Squad

Lightf150
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Anyone run Clifford performance shorty headers?

Post #1 by Lightf150 » Sat Jan 07, 2017 11:01 am

I've decided to rebuild my 4.9 to higher performence. And my manifolds leak at #1 and #3 and walker doesn't make a y pipe any more. I've decided on headers. Long tubes have fitment issues but I haven't heard anything about shorty headers will the ones from clifford fit. It says 80 & up trucks but ford switch to efi in 87 so dies this make a difference in fitment?

F-250 Restorer
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Re: Anyone run Clifford performance shorty headers?

Post #2 by F-250 Restorer » Sat Jan 07, 2017 1:09 pm

It looks like the Cliff headers will fit 80--87. In 88, as you mentioned, Ford went to efi and the split exh manifolds. I don't know if Cliff means they fit thru the efi years to the last 300 year in 96. It is best to call and ask.

You might consider keeping/using the EFI manifolds. According to the chart I go by (http://www.exhaustvideos.com/faq/how-to ... 0537109375), you can get up to 217 hp through a 1.75" dual system. Is that in your range?

I currently run a Hedman set on my 75 F250. I have a set of the Cliff shorties that I am hoping to install. I like the 1 5/8" tubes, as opposed to the 1 1/2" ones of the Hedman. I thought the shorty set would give more room on that side of the bay, and allow me to route the pipes around the starter and frame.

I haven't gotten to the actual doing part yet, but on initial inspection, they look as though they will work. As always, Cliff still seems to charge twice the going rate.

If there is a fitment issue, I'll have the Hedman's ceramic coated, install an efi mini starter, and reuse the Hedman.

*About using a header: They give off a lot of heat. So much so that I had problems with vapor lock with several carburetors on a DP intake. Either use the C type intake, or run a Holley carb to avoid heat probs, or both.

Good luck.

Soldmy66
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Re: Anyone run Clifford performance shorty headers?

Post #3 by Soldmy66 » Sat Jan 07, 2017 2:14 pm

I understand the Walker Y Pipe is available again.

jjona5
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Re: Anyone run Clifford performance shorty headers?

Post #4 by jjona5 » Sat Jan 07, 2017 7:37 pm

Yup it's available they just make them in batches. http://www.autozone.com/emission-contro ... 77214_0_0/ Other places have them too.

Lightf150
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Re: Anyone run Clifford performance shorty headers?

Post #5 by Lightf150 » Mon Jan 09, 2017 2:12 pm

Sorry for late response I've been busy snowplowing. No you can't buy them if you try to order them it says item not available I've thought I got one from jegs performance ordered it dec 8 but it delayed shipping to Dec 22 then got email for Jan 3 then a no ETA email so you can't buy them any more.

Fordman75
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Location: Southern, Minnesota

Re: Anyone run Clifford performance shorty headers?

Post #6 by Fordman75 » Mon Jan 09, 2017 8:06 pm

It's not that difficult to build a Y-pipe.
Ted

54 Ford F100/F150 4x4
300, NP435 4spd, NP205 transfercase

Lightf150
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Re: Anyone run Clifford performance shorty headers?

Post #7 by Lightf150 » Tue Jan 10, 2017 11:59 am

I can make a y pipe but would buying the headers be worth it?

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tom954x4
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Location: Twilight zone, WA

Re: Anyone run Clifford performance shorty headers?

Post #8 by tom954x4 » Wed Jan 11, 2017 2:30 pm

On the heat issue with headers, I would think using exhaust wrap on the headers would insulate them quite well and avoid some of the excess heat in the engine bay and associated carb issues F-250 Restorer mentions. I have not tried using the wrap on an exhaust system but I recently used it on a very hot pipe coming out of a diesel heater unit and the pipe is now warm to the touch.
1995 F-150 XL, 300-6, 4x4, ex-cab, sb, 3.08 5-speed, 2 1/2 in. exhaust w/flowmaster 50, MSDignition failed with no warning, now out, canopy, 179,000 + miles. Gone but not forgotten 1965 F-100 240 3spd lwb "the green hornet"; 1960 F-250 4x4, 223 six, 4sp with wrap-around rear window, two-tone paint, overhead camper.
Tow vehicle: 2012 F-250 4x4 6.7 diesel XLT s/c lwb

Fordman75
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Location: Southern, Minnesota

Re: Anyone run Clifford performance shorty headers?

Post #9 by Fordman75 » Wed Jan 11, 2017 8:28 pm

The wrap works. But it also dramatically shortens the life of the headers.
Ted

54 Ford F100/F150 4x4
300, NP435 4spd, NP205 transfercase

Lightf150
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Re: Anyone run Clifford performance shorty headers?

Post #10 by Lightf150 » Wed Jan 11, 2017 9:18 pm

I'm leaning towards keeping manifolds unless somemore people show some support for headers over manifolds. How would header wrap shorten header life? wont the headers get hot enough to burn off moisture?

F-250 Restorer
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Re: Anyone run Clifford performance shorty headers?

Post #11 by F-250 Restorer » Thu Jan 12, 2017 10:58 am

According to this site, http://www.exhaustvideos.com/faq/how-to ... 4570312500 the max hp for a dual 1.75" system is 217 hp. The diameter of the efi manifolds exit or collector, to use header terminology, is 1.75". If you're not going to have move hp than that, then stick with the mannies.

**For all the members thinking the EFI manifolds flow almost as much as a set of headers, the chart in the above link states that the Hedman header flows almost double the cfm as the efi manifolds.

Fordman75
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Location: Southern, Minnesota

Re: Anyone run Clifford performance shorty headers?

Post #12 by Fordman75 » Thu Jan 12, 2017 12:13 pm

F-250 Restorer wrote:According to this site, http://www.exhaustvideos.com/faq/how-to ... 4570312500 the max hp for a dual 1.75" system is 217 hp. The diameter of the efi manifolds exit or collector, to use header terminology, is 1.75". If you're not going to have move hp than that, then stick with the mannies.

**For all the members thinking the EFI manifolds flow almost as much as a set of headers, the chart in the above link states that the Hedman header flows almost double the cfm as the efi manifolds.


The EFI manifold outlets can be opened up( ported ) to dramatically increase the flow over stock. No they will not out perform headers. But most people are willing to compromise some on the max HP to not have some of the hassles headers can cause.
Ted

54 Ford F100/F150 4x4
300, NP435 4spd, NP205 transfercase

Lightf150
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Joined: Tue Nov 08, 2016 10:56 pm

Re: Anyone run Clifford performance shorty headers?

Post #13 by Lightf150 » Thu Jan 12, 2017 7:37 pm

The EFI manifold outlets can be opened up( ported ) to dramatically increase the flow over stock. No they will not out perform headers. But most people are willing to compromise some on the max HP to not have some of the hassles headers can cause.[/quote]

Never thought about porting manifolds. Anybody got more information?

guhfluh
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Re: Anyone run Clifford performance shorty headers?

Post #14 by guhfluh » Sat Jan 14, 2017 8:50 pm

Yeah, look down a few threads at my dyno graph. 220 WHEEL horsepower on a Mustang dyno through EFI manifolds and full single exhaust. You can compare that to a 2015 Ram 1500 5.7 Hemi at 270whp on the same dyno a few minutes earlier.

I still feel like I should have kept my ceramic coated headers I had and used them instead. The EFI manifolds don't look as stock as I wanted, and I could have made them clamp to the head just fine with some work. Getting a nice exhaust built behind them would have been my only issue. I believe my current Y pipe from the manifolds are from MagnaFlow, but they have nice mandrel bends and a header type merge.
1967 F-250 Crew Cab 2wd, 300 6cyl, T-170/RTS/TOD 4-speed overdrive
240 head, Offy C, EFI exhaust manifolds, Comp 268H, mandrel 2.5-3" exhaust, Edelbrock 500, Pertronix ignitor and coil, recurved dizzy. 200whp/300wtq

SteveP
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Re: Anyone run Clifford performance shorty headers?

Post #15 by SteveP » Sun Jan 15, 2017 11:02 am

tom954x4 wrote:On the heat issue with headers, I would think using exhaust wrap on the headers would insulate them quite well and avoid some of the excess heat in the engine bay and associated carb issues F-250 Restorer mentions. I have not tried using the wrap on an exhaust system but I recently used it on a very hot pipe coming out of a diesel heater unit and the pipe is now warm to the touch.


I used Eastwood Internal Exhaust Coating on my Hedman header and it seems to help.

http://www.eastwood.com/eastwood-hi-tem ... ozzle.html

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