Dumb question: Is it ok for the i/c hose to expand on boost? - LotusTalk

Smoky · 10-18-2009, 04:07 PM

I figure this is a dumb question, but I never noticed this before so I though it wouldn't hurt to ask.

Today I installed some rls intercooler tubes and hose techniques hose/clamps for some engine bay pretty. All went well during the install. When I rev the motor the hose entering the i/c (the one after the s/c) inflates a bit. None of the others do this. I never noticed (nor looked for) the stock hose inflating.

Is this normal or do I need to adjust that hose a bit? The hose has a good bit of the tube, and of the i/c. I think it's on as far it needs to go. Could the expanding hose mean there is too much space between the tube and the i/c?

Thx

Westrock · 10-19-2009, 07:20 AM

Havent seen them with boost, but the couplers on my VF kit compress a bit under normal vacuum.

antinym · 10-19-2009, 07:43 AM

Mine expand and compress. I don't know if it's normal, but I've had no issues.

Seb · 10-19-2009, 07:45 AM

That's normal with boost and vacuum.

If the hose is expanding that will hurt your throttle response. Get some hard piping and be done with it.

Smoky · 10-20-2009, 04:45 AM

Quote:

Originally Posted by Seb

That's normal with boost and vacuum.

If the hose is expanding that will hurt your throttle response. Get some hard piping and be done with it.

Thanks guys! I won't worry about it too much then.

So maybe these hose techniques hose aren't all that great? They have a good rep. But I swear I don't remember the factory hose doing this.

Thx again!

xtn · 10-20-2009, 04:51 AM

Hard pipe expands too. Not noticeably, but if you put a good enough micrometer on it you would see it.

xtn

Smoky · 10-20-2009, 08:22 AM

Quote:

Originally Posted by Seb

That's normal with boost and vacuum.

If the hose is expanding that will hurt your throttle response. Get some hard piping and be done with it.

Do you have a link? I'd like to see what these look like installed on the Exige.

Thx

Seb · 10-20-2009, 10:50 AM

Oh I wasn't talking about something specific that exists. I recommend just cutting the section from exhaust piping.

Mr.C · 10-20-2009, 01:11 PM

Quote:

Originally Posted by xtn

Hard pipe expands too. Not noticeably, but if you put a good enough micrometer on it you would see it.

xtn

10-18-2009, 04:07 PM	#1 (permalink)
Smoky Registered User Join Date: Mar 2008 Location: Lafayette, LA Posts: 458	Dumb question: Is it ok for the i/c hose to expand on boost? I figure this is a dumb question, but I never noticed this before so I though it wouldn't hurt to ask. Today I installed some rls intercooler tubes and hose techniques hose/clamps for some engine bay pretty. All went well during the install. When I rev the motor the hose entering the i/c (the one after the s/c) inflates a bit. None of the others do this. I never noticed (nor looked for) the stock hose inflating. Is this normal or do I need to adjust that hose a bit? The hose has a good bit of the tube, and of the i/c. I think it's on as far it needs to go. Could the expanding hose mean there is too much space between the tube and the i/c? Thx __________________ -Smoky '07 Exige S, Chrome Orange, Track/Touring, LSD, Starshield, 2Bular 8x24, ACT XTSS Clutch, Fidanza Flywheel, S111 RTD brace, S111 Ultra Discs, rls Intercooler, Goodrich S/S brake lines, Innovative engine mounts, Valentine 1

10-19-2009, 07:20 AM	#2 (permalink)
Westrock Haxord but mine Join Date: Sep 2005 Location: Fort Worth Posts: 1,338	Havent seen them with boost, but the couplers on my VF kit compress a bit under normal vacuum. __________________ -David 2006 Storm Ti Exige + VF Stage 2 Vision Function Supercharger Install Thread Stereo Harness Info \| Exige with no wing??

10-20-2009, 04:51 AM	#6 (permalink)
xtn McLareghini Bugatterrari Join Date: May 2006 Location: Texas Posts: 6,845	Hard pipe expands too. Not noticeably, but if you put a good enough micrometer on it you would see it. xtn __________________ 2006 McLareghini Bugatterrari, Storm Titanium... <mods> installed: air horn, Scroth 4-point ASM harnesses, Sector111 halon extinguisher and mounting bracket, Von Hep exhaust and rear panel delete, Pagid brake pads, red Volks CE28n wheels, Toyo RA-1 tires, Nitron SA coilovers, Sector111 (WorksBell) quick-disconnect steering wheel kit. awaiting installation: Scroth "pull-up" lap belts, Sector111 RTD Brace, Tony's heater bypass mod, and dropped steering rack mounting plates. </mods>

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10-19-2009, 07:43 AM	#3 (permalink)
antinym The Doombringer Join Date: Nov 2006 Location: Orlando, FL Posts: 656	Mine expand and compress. I don't know if it's normal, but I've had no issues.

10-19-2009, 07:45 AM	#4 (permalink)
Seb <3 QR25DE Join Date: Mar 2007 Location: Austin, TX Posts: 750	That's normal with boost and vacuum. If the hose is expanding that will hurt your throttle response. Get some hard piping and be done with it.

10-20-2009, 10:50 AM	#8 (permalink)
Seb <3 QR25DE Join Date: Mar 2007 Location: Austin, TX Posts: 750	Oh I wasn't talking about something specific that exists. I recommend just cutting the section from exhaust piping.

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