swisstonihasher

Hey all,

I've got the hybrid 3" samco inlet hose and I've got boost/power drop from about 5,500-6,000 revs, I wonder if its the 90 deg bend on the samco squeezing in under suction?

Anyone else had this and resolved the problem? What mod did you do?

smokingkills

iTrader: (3)

I've got the same problem: https://www.scoobynet.com/general-te...uggestion.html

MY,k436suy

I believe (don't quote me!) that jubile clamps around the pipe have been used to help with this, stops the pipe contracting out of shape.

smokingkills

iTrader: (3)

I've heard that too, but it depends where the airflow is being restricted. In my case the restriction is at the bend where the pipe joins the turbo.

smokingkills

iTrader: (3)

What year is yours & do you have aftermarket headers & turbo?

"Taylor"

iTrader: (2)

I had this problem as well after fitting a 20g. I've since replaced the Samco 90degree bend with a solid aluminium 90 degree bend and it seems to have solved the problem. Merlin motorsport supply them approx £15 + delivery.

swisstonihasher

Thanks for the reply guys, mine's an 02 model with same Garrett hybrid on 3" inlet, its not bad for fitting under the manifold and is a little out of alignment but its still good enough. I cant see the hybrid hose crushing in the middle, it seems very solid and is thick walled, its not at the bend though, very easy to push in by hand to almost completely crushed.

I'll go with the metal 90 deg bend, then no chance it will squeeze under vac, cheers all.

"Taylor"

iTrader: (2)

swisstonihasher

Just done it, had brain wave and used wire from some cooling brake pipes I had, cut off the cloth material and inserted the "coil" like metal wire. Its in past the 90 deg bend so makes the whole thing rigid - boost to 7000 here we come! Cheers all.

"Taylor"

iTrader: (2)

Just make sure there's no way it can get sucked down into the turbo, otherwise bye bye compressor blades! Or do you mean you've threaded it between the inner and outer layer of the samco pipe itself? If so, genius idea!

swisstonihasher

Na, its just on the inside but wont move that's for sure - it was so hard just to push the wire in just past the 90 deg bend, its not long enough to reach down into the turbo itself and cant see any possible way it work its way around the bend. May change it later but at least it allows me to get it properly mapped in few weeks.

swisstonihasher

I;ve changed my mind, dont like the thought of having anything internal so I;ll be using clips on the outside at two points to help stop it crushing...has that totally fixed the problem for others or do they still get boost drop on an MD321T?

swisstonihasher

Did tests with applying almost equal pressure around the 90 deg bend area, found coil wire is moving so I've ripped it back out. Will try jub clips next in hope to put strength in the samco - if that fails, will buy 90 deg metal pipe.

StickyMicky

i have had jubblie clips on my samco inlet for around 5 years now with no issues, without them it was sucking itself closed over 5.5krpm

swisstonihasher

Excellent, I'll be doing the fit tonight with 2 clips, possibly 3 and get car tested in 2 weeks time.

Are you running a big turbo and hybrid hose? Just wonder if its the bigger size hose that's the problem (as in smaller one doesn't suck shut), not that I'll be changing back to smaller size as need the air flow.

JohnD

iTrader: (5)

Makes you wonder if it's not such a bad idea to retain the original hard plastic item? (unless you need it to fit a larger turbo inlet - as in your case)) Maybe take a look at the Viper Performance version. I've got one (not yet fitted) and it's really stiff and well made. It's also MUCH cheaper than Samco.

JohnD

swisstonihasher

I amazed Samco haven't got this right yet, surely they know the hybrid samco hose (which is much bigger internally than oe plastic job, as long as it doesn't suck shut lol) will have alot of vac with big turbos...Come on Samco, sort it out!

swisstonihasher

Right then, after scrapping the coil wire idea (was no brainer in end ) I've just fitted two external clips, one is really good at holding most of the 90 deg bend in place but the other actually reduces the bore by 5-10mm I'd say just at the end, by the metal ring. Still can move part of the 90 deg bend although more effort required and the rest is solid down to turbo.

Taylor, do you have a pic of your metal 90 deg bend as the clips aren't perfect, although I'm sure they'd be a big improvement? Reason I ask is the hybrid hose isn't exactly round after the 90 deg bend, its very oval looking.

"Taylor"

iTrader: (2)

What set up are you running? I'm using a TD05-20g on a phase 1 manifold, so i'm using the samcos to create the 90 degree inlet that i need on my manifold. So theres a 90 coming off the turbo going up into a 90 connecting to the Maf. The samcos are 63mm inside diameter and ive used the 60mm outside diameter aluminium 90 and pushed it up inside the the samco. Heres a link to the part: 90 Degree 60mm Hose Joiner Elbow from Merlin Motorsport

StickyMicky

i have about 5 clips on my inlet pipe, the one that goes under the inlet manifold on the later classics.

i only changed mine because the stock hose was split, if it was not split, i would not change it to be honest!!!

hamyam

Hi Taylor, see you replaced the original inlet pipe with samco. How have you plumbed in the dumpvalve

swisstonihasher

Sorry guys, my setup is completely different, new age 02 with Garrett hybrid turbo 3" inlet and 3" hybrid Samco hose to match - hence couldn't see how you could get a round metal 90 to sit very well with the oval samco.

I need to think longer about this but I'm happy to get it mapped as is (as few other mods going on in 2 weeks) and then fix the hose properly after, with those clips I can see it squeezing much, well hope not anyway.

"Taylor"

iTrader: (2)

I run a FMIC so its relocated to the pipe work over near side of the engine bay. I also rerouted all my breathers to a catch tank and VTA.

swisstonihasher

Hmm, just looked at that APS alloy turbo kit 70mm and its got two bends by the maf? Anyone using it without running problems?

I cant use it for two reasons though, one is I'm having a blow through setup done shortly (one of the mods to be done by my mapper) and the other is that it feeds from the wing on the hole that my FMIC pipe comes out of...back to drawing board.

I may try my m8s at Forge Motorsport to see if they can make me up a custom short length 70mm 90 bend...will email them tonight.