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Old 04-02-2003, 10:14 PM   #1
STR8OUT
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Default Can someone please confirm the correct hoses I need to get for my Perrin Fuel Rails?

Hi,

If anyone could confirm the correct size Fuel and Vacuum hoses I need for my Perrin Fuel Rail install this weekend I'd appreciate it.

I searched and only found one person saying that its:
3/8 Fuel Hose &
1/8 Vacuum

Can someone let me know if this is in inches and how long the pieces need to be? Any help is greatly appriciated. Im installing the rails and PE1820 on Saturday dont want to mess up anything. Im sure I'll have to do some major Utec tuning also.

Any tips on Tuning and Installing are VERY helpful. Thanks guys!

Best regards,
-Brian
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Old 04-02-2003, 10:34 PM   #2
driggity
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You could always look at the instructions on their website

Quote:
PARTS YOU WILL NEED:

* -1/4 VACUUM HOSE 3FT
* -1/2 FUEL HOSE 4FT........
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Old 04-02-2003, 10:53 PM   #3
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I think the 1/2" hose must be outer diameter, because 1/2" ID is WAY too big. I got 4 feet of it and only used a small portion (like 1 foot or less). The vacuum line needs to be at least 3 feet long depending on how you route it (you'll probably trim it some, but that should give you plenty to work with).

'edit'- the fuel hose I used was indeed 3/8"
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Old 04-02-2003, 10:56 PM   #4
STR8OUT
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Thanks for the responses guys but I swear I've heard that the hoses Perrin tells you to get are the wrong sizes or something.

Arent they to big or something? Please more people chime in.

Thanks for the lenth measurments Bolster. That helps a lot. Im not trying to be running to Pep Boys or Home Depot in the middle of this install or anything.....

Thanks again,
-Brian
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Old 04-02-2003, 11:06 PM   #5
Bolster
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I didn't use 1/8" vacuum line for my install since I had some silicon hose that was the same size, but 1/8" should do the trick. In fact, I noticed this evening that I had a tear in the line and had to fix it. Usually silicon is pretty tough.
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Old 04-03-2003, 01:01 AM   #6
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Quote:
Originally posted by STR8OUT
Thanks for the responses guys but I swear I've heard that the hoses Perrin tells you to get are the wrong sizes or something.

Arent they to big or something? Please more people chime in.

Thanks for the lenth measurments Bolster. That helps a lot. Im not trying to be running to Pep Boys or Home Depot in the middle of this install or anything.....

Thanks again,
-Brian
I found the ones that Perrin recommends were too large. I ended up running to my local parts store to get the correct sizing. I think it came out to 3/8" fuel and the smallest hose I could find for vacuum(1/8" I think).
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Old 04-03-2003, 11:24 AM   #7
Egan
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The 1/2" hose for the evap and the 1/4" (I think it is 1/8") for the FPR come with the Perrin kit! Check the bottom of your box.

At least they came with mine. I installed the rails on my removed intake manifold last weekend. Simple install with the manifold out. Taking the manifold out was another story.
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Old 04-03-2003, 12:16 PM   #8
cavymeister
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Be sure you use fuel injection hose and not carbuerator. The carb hose can't handle the pressure.
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Old 04-03-2003, 12:21 PM   #9
Egan
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Neither hose actually runs fuel (at pressure). The small hose connects the intake manifold to the port on the FPR. It's used to detect boost and raise the Fuel Pressure accordingly (IIRC). The larger hose is part of the evaporative system (3rd "fuel" line). All of the pressurized fuel lines are SS hose and part of the Perrin rail system (pre-assembled).
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Old 04-03-2003, 12:50 PM   #10
STR8OUT
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Thanks for all the info guys. I hope this thread is useful to others who are installing Perrin Rails.

I am very surprised that Perrin still hasnt changed the directions on thier website.

Thanks again, please let me know if you have any other tips for me. I'm gonna go and buy the hoses today after work. Can I get them at Pep Boys?

Brian
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Old 04-03-2003, 12:54 PM   #11
Egan
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I was at Pep Boys yesterday and they do have various sizes of fuel line and fuel injector hose.

Does your reply mean your kit did not come with the hoses? I bought mine a couple of weeks ago and it did come with the necessary hoses. That seems odd.
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Old 04-03-2003, 03:14 PM   #12
STR8OUT
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Quote:
Originally posted by Egan
I was at Pep Boys yesterday and they do have various sizes of fuel line and fuel injector hose.

Does your reply mean your kit did not come with the hoses? I bought mine a couple of weeks ago and it did come with the necessary hoses. That seems odd.
I bought my kit a couple of months ago and never got around to installing them. They didnt come with any hoses. It even says in the directions that I will need to buy these hoses......

Im sure the hose isnt more than $10 so its cool. I also got a great price on the rails so it works out ok..

Thanks again everyone.
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