 
     |
| The Turbo 3500 F23 swap (Page 18/80) |
|
Joseph Upson
|
FEB 11, 01:29 PM
|
|
| quote | Originally posted by ericjon262:
I am aware that the bellows are available in the aftermarket, the problem I am running into is space, I don' t have a 4" strait run that I can put a flex joint in, on either bank... so I am trying to find a pair in 2" that are under 3" in length. the GM ones look like they may work, and if the do, I'll see if the dealer can get a pair for me.
|
|
That's a lot of money to throw away at the dealer for a crossover to cut up as that's the only way you'll be able to get it. Your crossover being as long as it is will probably be fine as it is because the extra length of pipe allows for some flexibility, adding one bellows joint would probably more than suffice. If you look at Hudini's crossover you'll see that it is short and has more of a linear opposing expansion arrangement, where yours is more of a scissor type arrangement.
You don't have to have a perfectly straight section, you can get a bellows one size up that slips over the main pipe with enough room to accomodate a little bit of a curve, cut a small space in the main pipe or better yet make it a slip joint which GM did with some or all of their bellows then weld the bellows ends to the main pipe enclosing the slip/expansion area.
Those joints will be more crucial if you wrap your exhaust, I discourage you from doing that in favor of shielding or some type of heat blanket. I've made a number of mild steel exhaust manifolds using 14 ga steel and they don't do well over the long hall wrapped behind a turbo.
|
|
|
|
ericjon262
|
FEB 11, 01:36 PM
|
|
|
. [This message has been edited by ericjon262 (edited 09-11-2022).]
|
|
|
|
aaron88
|
FEB 11, 01:48 PM
|
|
This is an FYI. You may already know about this but I thought I'd add it in here. I discovered on two transmissions that had exhaust running close to the aluminum casting. One was a stock Fiero with a stainless steel exhaust with no shielding. The other was a turbo setup, again no shielding. In both those cases the aluminum bellhousing had spider cracks all over it. My conclusion was that the heat cycles were too much for the aluminum which is very week at high temperatures. The cracking had not caused a failure but I could only assume that eventually it would have.
This is why manufacturers use double walled tubing on cross overs and a lot of the time on the headers too. To keep the heat away from the aluminum. Especially the transmission which does not have cooling in the bell housing.
.
|
|
|
|
ericjon262
|
FEB 11, 01:51 PM
|
|
|
. [This message has been edited by ericjon262 (edited 09-11-2022).]
|
|
|
|
ericjon262
|
FEB 11, 07:15 PM
|
|
|
. [This message has been edited by ericjon262 (edited 09-11-2022).]
|
|
|
|
ericjon262
|
FEB 12, 07:02 PM
|
|
|
. [This message has been edited by ericjon262 (edited 09-11-2022).]
|
|
|
pttransamdriver
|
FEB 12, 08:50 PM
|
|
| quote | Originally posted by Niterrorz:
you had me untill the oil filter plumbing |
|
I wish this quote had a like button 
Anyway Eric, I do see your reasoning for putting the piping in, but I still think there must be a better/lighter way of doing it. Also you will have to account for the extra volume of oil that will be in there and think about if that might overfill your reservoir.
|
|
|
|
ericjon262
|
FEB 12, 08:54 PM
|
|
|
. [This message has been edited by ericjon262 (edited 09-11-2022).]
|
|
|
|
Hudini
|
FEB 12, 09:10 PM
|
|
|
The stock crossovers were 1.5" ID same as the stock 2.8L exhaust logs. I wanted high velocity before the turbo so kept everything the same. The exhaust ports on the 2.8L/3.4L iron heads are only about 1" ID stock anyway. How big are those aluminum head exhaust ports?
|
|
|
|
ericjon262
|
FEB 12, 09:12 PM
|
|
|
. [This message has been edited by ericjon262 (edited 09-11-2022).]
|
|
|
