Zangel

iTrader: (11)

After we finished putting the new head gaskets on the car, we noticed a little problem with the manifold.

rwb

A little JB Weld should fix it.

Zangel

iTrader: (11)

Hey, there's an idea! I was just going to use duct tape

paspar2

Annoying but doesn't look too bad... What kind of welds?

Zangel

iTrader: (11)

Tig welds.. hopefully it will be fixed soon.

Reject

iTrader: (24)

what about some bubble gum?

NA$TY-TA

iTrader: (21)

Damn already....... i guess if they are going to fix it no questions asked id be ok with it... if not id be pissed andmakea ig deal about it.... how are they treating you???

Kyle

Zangel

iTrader: (11)

Haven't told him about it yet. Since he has always been extremely helpful, I don't think it will be a problem getting this fixed.

JZ 97 SS 1500

iTrader: (2)

If your using SS304, be ready for more cracks. Main reason why we stopped using 304. Just ask the Supra guys. Cracked headers are pretty common if you drive it on the street with 304. Make sure you have the turbo braced, that will help with some stress.

Jose

SScam68

iTrader: (20)

Where is it located? Rear? Front?

Zangel

iTrader: (11)

The crack is in the rear (last tube) of the manifold. I am not sure which material he used to make the manifold, but I am pretty sure that it is 304.

Scalpel

iTrader: (4)

That sucks. I hope a new bead will fix it.

PS, why did ya' put new headgaskets on the car? Lowering the SCR?

NA$TY-TA

iTrader: (21)

Levi,

If i remember correctly Brian said something about leaking coolant when the car was on the Power Tour.
Kyle

Zangel

iTrader: (11)

Yep, we got a little boost happy before finishing the tune and popped a head gasket.

NA$TY-TA

iTrader: (21)

damn im good....... how isd it i can remember all this crap but i cant remember what my girlfriend said this morning.......

V8_DSM_V8again

There is only one long term solution..

These are a different... 4-1 style etc... That is'nt the point.. Its the double slip joint...

http://www.burnsstainless.com/MergeC...ollectors.html

The best tubular turbo manifold will eventually crack wo slip joints.

Its like expansion joints in concrete..

Basicaly brace the turbo to the block supporting its weight completely then have slip joints in the tubular manifold for room to expand and contract. A log mani needs them on each runner where it meets the log just as a 4-1 needs them where the runners meet the collector...

METAL MAN

This isn't the answer to most cracking issues. 99% of all manifold failures can be contributed to manifold design. Log manifolds will always crack even if constructed from 321 or inconel. Log manifold designs basically self destruct from expansion and extreme temperatures at the last two cylinders on the exit end. Second biggest killer is weight and how the manifold is designed to distribute it. If you're hanging a 40-45LB turbo off tubes that are going to reach in excess of 1000degrees something has to give sooner or later.

Heavy wall construction (.083 or thicker) is the best choice if the turbo must be supported only by the manifolds. 304 or better is also a must, mild steel has a much lower tolerance to heat cracking even if coated. Bellows/flex joints should be used to isolate heat expansion and vibration from the manifolds.

Pretty much every Supra manifold I've seen supports the turbo from the manifold alone. What seems to kill them are the excessively long runners they use. Even with heavy wall tube the extreme amount of leverage placed on the runners off the head will crack sooner or later. In that situation either add some support off the frame rails or gusset the tubes out of the head.

Just some of my experience as a turbo manifold fabricator. Most people don't want to spend the money on a well designed SS manifold with individual runners but instead deal with cracking crap designs that are nothing but a headache and kill performance.

DMH Fabrication

iTrader: (126)

i'm running 321 stainless on a new set up...just waiting on the turbo to get here so i can finish it up

smokinHawk

iTrader: (48)

yup get used to it, just dnt nget them coated, cause its heck to weld on when you have to fix it
sounds like Brian needs to pick up a tig soon (heres your excuse)

like everyone said its pretty much in the log design, glad im switching to cast manafolds now.

Billiumss

iTrader: (11)

What brand is it? How old is it?

I am probably going to get the TTI kit and I hope I don't have to get it rewelded every year...