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2.5" Dump pipe for 4JB1T

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Re: 2.5" Dump pipe for 4JB1T

Postby isuzurob » Sat Sep 10, 2016 5:28 pm

i just made a 2 1/2 dump pipe and exhaust for my bighorn today, can tap the holes and just put bolts in, i just pull the plate out and leave the rod in there on other ones
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Re: 2.5" Dump pipe for 4JB1T

Postby damo667 » Sat Sep 10, 2016 10:07 pm

Sweet
Will I get away with just removing intercooler, then unbolting dump pipe and manifold and pulling whole thing out with turbo attached?
vroom..._____________...........
vroom./---------|--------\.......
..&.....||______|_____O-\______....
....&...|--____---------------____--\..
........=\/-----\__________/-----\_|...
............\___/..................\___/...
User avatar
damo667
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Posts: 246
Joined: Fri May 27, 2011 12:27 pm
Age: 31
Country: new zealand
City: queenstown
Vehicle: 1990 Bighorn 2.8D Irmscher LWB
Roof rack,
31/10.5/15 Hankook Dynapro AT-M tyres,
6" speakers front and back, Sony head unit,
DIY Snorkel & K&N cotton filter,
Boost,EGT gauge
Adjusted boost,
Adjusted fuel,
High-flow muffler 2'5" pipe
2" suspension lift
EFS shocks

"the little rihno"

Re: 2.5" Dump pipe for 4JB1T

Postby isuzurob » Tue Sep 13, 2016 6:45 pm

Just undo dump pipe off turbo, leave manifold and turbo on the truck, you can get the flap out without removing the dump pipe if you really want, removing it doesnt do anything though
isuzurob
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Age: 25
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Vehicle: 1990 Isuzu Bighorn 2.8t/d, 3" extended shackles, 2" body lift, 33" silverstone extreme tyres, Front+rear bars, winch with 40m dyneex rope, 21/2 inch exhaust, lokka's front+rear, custom turbo, emissions removed, injector pump modified and more

Re: 2.5" Dump pipe for 4JB1T

Postby damo667 » Wed Sep 14, 2016 9:51 pm

Cool cheers for the advice, I'm going to get on to it on Saturday..
When reinstalling, do you just use holts exhaust paste?
vroom..._____________...........
vroom./---------|--------\.......
..&.....||______|_____O-\______....
....&...|--____---------------____--\..
........=\/-----\__________/-----\_|...
............\___/..................\___/...
User avatar
damo667
Isuzu Senior
 
Posts: 246
Joined: Fri May 27, 2011 12:27 pm
Age: 31
Country: new zealand
City: queenstown
Vehicle: 1990 Bighorn 2.8D Irmscher LWB
Roof rack,
31/10.5/15 Hankook Dynapro AT-M tyres,
6" speakers front and back, Sony head unit,
DIY Snorkel & K&N cotton filter,
Boost,EGT gauge
Adjusted boost,
Adjusted fuel,
High-flow muffler 2'5" pipe
2" suspension lift
EFS shocks

"the little rihno"

Re: 2.5" Dump pipe for 4JB1T

Postby damo667 » Sun Sep 18, 2016 9:48 pm

I got the sucker out without removing turbo+manifold, I had to remove the studs from the turbo and remove the oil filter. It still took a bit of jiggling..
I'm going to cut the spindle out tomorrow and put a plate over the hole. (using existing bolts to attach the plate)

P1060297.JPG


A metal gasket came out of the turbo end can I reuse it? should I chuck some exhaust paste or liquid gasket on it?

P1060298.JPG


Cheers
You do not have the required permissions to view the files attached to this post.
vroom..._____________...........
vroom./---------|--------\.......
..&.....||______|_____O-\______....
....&...|--____---------------____--\..
........=\/-----\__________/-----\_|...
............\___/..................\___/...
User avatar
damo667
Isuzu Senior
 
Posts: 246
Joined: Fri May 27, 2011 12:27 pm
Age: 31
Country: new zealand
City: queenstown
Vehicle: 1990 Bighorn 2.8D Irmscher LWB
Roof rack,
31/10.5/15 Hankook Dynapro AT-M tyres,
6" speakers front and back, Sony head unit,
DIY Snorkel & K&N cotton filter,
Boost,EGT gauge
Adjusted boost,
Adjusted fuel,
High-flow muffler 2'5" pipe
2" suspension lift
EFS shocks

"the little rihno"

Re: 2.5" Dump pipe for 4JB1T

Postby isuzurob » Tue Sep 20, 2016 4:17 pm

Good work, ive always reused the gaskets, can put maniseal or high temp silicone as its post turbo
isuzurob
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Vehicle: 1990 Isuzu Bighorn 2.8t/d, 3" extended shackles, 2" body lift, 33" silverstone extreme tyres, Front+rear bars, winch with 40m dyneex rope, 21/2 inch exhaust, lokka's front+rear, custom turbo, emissions removed, injector pump modified and more

Re: 2.5" Dump pipe for 4JB1T

Postby damo667 » Wed Sep 21, 2016 9:01 pm

Yeah I ended up putting maniseal on it,
Cant believe the difference just taking that spindle out made.. the engine revs free-er and the turbo seems to spool up quicker..
Will be interesting to see if upsizing the final section of pipe will make a noticeable difference..

Cheers for your help guys..

P1060299.JPG
You do not have the required permissions to view the files attached to this post.
vroom..._____________...........
vroom./---------|--------\.......
..&.....||______|_____O-\______....
....&...|--____---------------____--\..
........=\/-----\__________/-----\_|...
............\___/..................\___/...
User avatar
damo667
Isuzu Senior
 
Posts: 246
Joined: Fri May 27, 2011 12:27 pm
Age: 31
Country: new zealand
City: queenstown
Vehicle: 1990 Bighorn 2.8D Irmscher LWB
Roof rack,
31/10.5/15 Hankook Dynapro AT-M tyres,
6" speakers front and back, Sony head unit,
DIY Snorkel & K&N cotton filter,
Boost,EGT gauge
Adjusted boost,
Adjusted fuel,
High-flow muffler 2'5" pipe
2" suspension lift
EFS shocks

"the little rihno"

Re: 2.5" Dump pipe for 4JB1T

Postby stardog » Sun Sep 25, 2016 2:58 pm

I bought a 2.5" dump pipe off eBay not long ago cost around $230 you can get 2 types 1 for facing up oil filter or the later back facing oil filter.
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Vehicle: 94 mu was 3.1 turbo intercooled now 2.8td rodeo gear drive engine and intercooled and fuel delivery turned up 3" system from turbo 5 speed manual arb bullbar 13000 LB winch max winch snorkel HID headlights HID IPF spotlights blue led dash lights LOKKA front diff new bushes shocks all round 80 ch unden uhf sony xplode mp3 player back seats removed and storge system put in.
96 wizard 3.1 pretty stock for now but have plans intercooler bulbar winch snorkel.

Re: 2.5" Dump pipe for 4JB1T

Postby damo667 » Sat Oct 01, 2016 4:49 pm

Thats pretty reasonable, I might consider that next time I've got it apart
Was that in Aus?
vroom..._____________...........
vroom./---------|--------\.......
..&.....||______|_____O-\______....
....&...|--____---------------____--\..
........=\/-----\__________/-----\_|...
............\___/..................\___/...
User avatar
damo667
Isuzu Senior
 
Posts: 246
Joined: Fri May 27, 2011 12:27 pm
Age: 31
Country: new zealand
City: queenstown
Vehicle: 1990 Bighorn 2.8D Irmscher LWB
Roof rack,
31/10.5/15 Hankook Dynapro AT-M tyres,
6" speakers front and back, Sony head unit,
DIY Snorkel & K&N cotton filter,
Boost,EGT gauge
Adjusted boost,
Adjusted fuel,
High-flow muffler 2'5" pipe
2" suspension lift
EFS shocks

"the little rihno"

Re: 2.5" Dump pipe for 4JB1T

Postby stardog » Sat Oct 01, 2016 5:39 pm

I got it on Ebay a mob up in Brisbane.
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Vehicle: 94 mu was 3.1 turbo intercooled now 2.8td rodeo gear drive engine and intercooled and fuel delivery turned up 3" system from turbo 5 speed manual arb bullbar 13000 LB winch max winch snorkel HID headlights HID IPF spotlights blue led dash lights LOKKA front diff new bushes shocks all round 80 ch unden uhf sony xplode mp3 player back seats removed and storge system put in.
96 wizard 3.1 pretty stock for now but have plans intercooler bulbar winch snorkel.

Re: 2.5" Dump pipe for 4JB1T

Postby isuzurob » Sun Oct 02, 2016 7:34 am

Turbo flange is $50 pipe $45 nz just weld it all together, i also heat wrapped it and flanged the bottom, thats what mine cost when i made mine a few weeks ago will try get photos, i dont think it made any difference to power and egt are exactly the same as with standard dump pipe
isuzurob
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Age: 25
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Vehicle: 1990 Isuzu Bighorn 2.8t/d, 3" extended shackles, 2" body lift, 33" silverstone extreme tyres, Front+rear bars, winch with 40m dyneex rope, 21/2 inch exhaust, lokka's front+rear, custom turbo, emissions removed, injector pump modified and more

Re: 2.5" Dump pipe for 4JB1T

Postby geeves » Sun Oct 02, 2016 11:38 am

Unless you are a reasonable welder that makes Stardogs price quite reasonable. 90 in parts and 140 in labour to make it and sell it. They will not be mass produced
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: 2.5" Dump pipe for 4JB1T

Postby stardog » Sun Oct 02, 2016 4:01 pm

The company I bought it off make 2 types of dump pipes 1 for the downward back facing oil filter and the other 1 for the normal up facing oil filter on the 2.8 engines.
They are made very well indeed I must say I haven't got round to fitting the dump pipe but will get it done soon I've just had to many things happening at the moment.
See how I pull up tomorrow after the grand final tonight go the storm i was a bit seedy this morning after western bulldogs beat the swans yesterday great to see that happening I was wrapped and im not even a bulldogs supporter.
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Posts: 860
Joined: Tue Nov 10, 2009 6:14 pm
Location: sydney nsw australia
Age: 57
Country: australia
City: sydney
Vehicle: 94 mu was 3.1 turbo intercooled now 2.8td rodeo gear drive engine and intercooled and fuel delivery turned up 3" system from turbo 5 speed manual arb bullbar 13000 LB winch max winch snorkel HID headlights HID IPF spotlights blue led dash lights LOKKA front diff new bushes shocks all round 80 ch unden uhf sony xplode mp3 player back seats removed and storge system put in.
96 wizard 3.1 pretty stock for now but have plans intercooler bulbar winch snorkel.

Re: 2.5" Dump pipe for 4JB1T

Postby awhitbread » Thu Sep 07, 2017 9:14 am

Factorydirect 4x4 exhausts.com do them for our rodeo. I just ordered a full 2.5" with dump pipe yesterday
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Re: 2.5" Dump pipe for 4JB1T

Postby stardog » Sat Sep 09, 2017 3:59 pm

I would double check if the dump pipe bolts up to the turbo on a 95 model if I remember they are for 97-98 onwards I found this out when I was going to fit mine the bolt holes and flange are different.
stardog
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Posts: 860
Joined: Tue Nov 10, 2009 6:14 pm
Location: sydney nsw australia
Age: 57
Country: australia
City: sydney
Vehicle: 94 mu was 3.1 turbo intercooled now 2.8td rodeo gear drive engine and intercooled and fuel delivery turned up 3" system from turbo 5 speed manual arb bullbar 13000 LB winch max winch snorkel HID headlights HID IPF spotlights blue led dash lights LOKKA front diff new bushes shocks all round 80 ch unden uhf sony xplode mp3 player back seats removed and storge system put in.
96 wizard 3.1 pretty stock for now but have plans intercooler bulbar winch snorkel.

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