paul_dezod

This topic has caused heated debate on another thread where a member on here and several other people have been mislead to believe that our manifold failed due to poor construction quality. This is not true in this case. Why is that? Read on:

The customer sent this picture to me first of all:


I proceeded to ask him for pictures of his downpipe and s-pipe. He sent me these:

Note in this image, there are no springs shown

Note in this image, there are no springs or donut gasket shown


Note there are normal bolts, no springs & no donut gasket. There is a simple nut and bolt that was torqued down to the downpipe. This means there is NO room for flex, movement or anything. He now just created a solid downpipe. This is not how the system was designed.

Our s-pipe comes with a female flare seat for the donut gasket to rest in for assembly of the spring loaded bolts. This assembly is near identical to what your OEM header has on it. Why did Toyota do this? Simply to allow for FLEX. We did the exact same thing our downpipe to s-pipe like Toyota did. We have proven that it works. We tested our kit at the drag strip and DD for nearly 8 months of constant abuse back in 2005.



Our downpipe, as you can see, has a little lip off the end of the flange. This is the accepting seat for the donut gasket, and the s-pipe has a bell mouthed female flare on the top of it. That is for the donut gasket to sit into.


A refresher on how your OEM looks:






If Toyota, GM, Honda etc all use it and employ millions of dollars worth of engineers' salaries, don't you think you should follow suit and use the parts as well? The OEM definitely know what they are doing and have spent the time and $$ in R&D to figure out what is going on.

DON'T LET THIS HAPPEN TO YOU

ack154

iTrader: (7)

Makes sense to me, no room for flex so it would be causing unnecessary stress on the rest of the parts (ie. manifold).

tcengel

Not to mention, solid engine mounts and eurethane exhaust hangers help alot!

One-Nut_McGee

Is the downpipe install kit included in the turbo kit or is it a separate item to be purchased?

Most of those parts look similar to the OEM parts, could a simple trip to the dealer yield these parts to fit the turbo setup?

paul_dezod

The downpipe hardware kit has always been included with the kit.

SoFloTC

iTrader: (3)

I also have solid mounts and eurethane hangers... clearly they didnt help enough leading to the manifold breaking.

tcengel

What I don't understand is how the manifold broke if the downpipe is bolted to the block? I could see the downpipe back breaking somewhere, but from the engine to that bolt in the block, there should be no movement.

SoFloTC

iTrader: (3)

thats what i figured cuz my exhaust doesnt move at all with the eurethane hangers.. literally doesnt move..

weezyfbayba

put it this way the way his downpipe is installed the bolts were pulling down on his manifold which caused alot of stress on the manifold which caused it 2 break? if the spring loaded bolts were on there they will only tighten up so far which wont pull down on the manifold? dunno if anyone even understands what i just said.. i barly do lol fail

SoFloTC

iTrader: (3)

the purpose of spring bolts are to reduce the vibrations and mvoements headed toward the manifold. what i was saying is idk how i had any if my exhaust is solid as a rock.

tcengel

But if the downpipe is attached to the block and the manifold is attached to the head and it's all now one piece bolted together, why would it snap in the middle? It would snap at the bottom of the downpipe after the bracket to the block.

Disclaimer (**** I am no expert or specialist, I just don't understand****)

SoFloTC

iTrader: (3)

nice disclaimer lol

paul_dezod

This is all mentioned in the install manual for the turbo kit, but is not spelled out in neon lights like this.

weezyfbayba

the downpipe/turbo is bolted to the manifold.. which is held up on the head if u use a regular bolt u can tighten the downpipe to tight if u have the spring loaded bolts they will only tighten up so far and also have some flex from the spring( i think) so when ever u get on the gas and the motor flex's back a little it pulls the manifold back with it its like some one pulling on the downpipe another person pulling on the manifold........ idk how to explain it but i get the reason u need spring loaded bolts

gompka

iTrader: (5)

Just cause its solid as a rock doesn't mean you don't get vibrations, the car itself vibrates and the exhaust is attached to the car. For example with urethan engine mounts, the engine is solid, but you get more vibrations at certain rpms because of it. Just goes to show you that a turbo setup is not something anyone can put together without a lot of research.

SoFloTC

iTrader: (3)

no, that wasnt to you paul that was to tcengel he wrote himself a disclaimer saying he had no idea what he was talkign about lol

Ace83

iTrader: (6)

a manifold to turbo flange is a high stress load area, the weight of the turbo and the lower components rest on it..

Ace83

iTrader: (6)

good post btw, this will save tons of manifolds lol

aen

home depot has springs and galvanized bolts that you guys can use.

aen

also, paul why don't you just weld a flexpipe into teh whole thing? rid of all probable complications in hte future