Vineboy
Isuzu Junior
96 MU-Keep honking, I'm reloading
Posts: 62
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Post by Vineboy on Mar 17, 2007 9:13:41 GMT 11
I just had my car serviced by Holden for it's 180000k service and while they were getting ready to do the valve adjustment they reckon they may have snapped a bolt/stud on the crossover pipe that goes into the exhaust mainfold so they left it as is in fear of doing more damage. They said when I get my 190k service done I bring in another manifold in case they have dramas. I said no way as these things don't grow on trees and if you break it why not pull the stud out and start again or at worst get some extractors/headers made up.
Question is, are there any off the shelf extractors that people have tried and what are the general thoughts?
Andrew
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Post by geeves on Mar 17, 2007 15:08:03 GMT 11
In general you cant do extractors on a turbo car. Certainly not off the shelf. One of out members did make some extractors to his turbo about 2 years ago If hes still around he might let you know how much work was involved. It took him nearly 6 months in spare time.
The manifolds shouls be easily available from 4x4isuzu.com but no idea on price. Just freight would mean you wouldnt want to buy it till it was needed
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Post by dasnoboarder on Mar 17, 2007 15:42:53 GMT 11
If headers/extractors/mainifolds are the same thing, changing the factory set to an aftermarket or custom made set is common practice in the performance car world. If you're prepared to pay for it, any performance workshop should be able to custom make you some that would provide better airflow to the turbo.
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force
Isuzu Baby
Have Mud will PLAY
Posts: 39
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Post by force on Mar 17, 2007 20:37:00 GMT 11
i dont know bout you guys but i hav a rule , they break it they fix it. if you have to pay them for their stuffup . dont go back, find a mechanic thats honest, theres plenty of them out there.
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Vineboy
Isuzu Junior
96 MU-Keep honking, I'm reloading
Posts: 62
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Post by Vineboy on Mar 18, 2007 8:29:00 GMT 11
i dont know bout you guys but i hav a rule , they break it they fix it. if you have to pay them for their stuffup . dont go back, find a mechanic thats honest, theres plenty of them out there. I agree. The problem is I live in the country and there arn't many people left to go too. In there defence they stopped trying to undo the bolt as soon as they realised there was going to be a problem, so now I have just a smal exhaust leak too live with. I'm sure you must be able to get headers for the 3.1. |
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Post by trikimu on Apr 27, 2007 15:41:05 GMT 11
Rotarua Import Pro Shop (RIPS) can custom make them but you need to give them the factory one as a template. www.ripsltd.co.nz/performance/ other wise and metal fab shop that does performance car stuff like RSL could do it. Tuned length ones would be the best way to go. |
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Post by dasnoboarder on Apr 27, 2007 18:26:08 GMT 11
 Wouldn't a custom larger exhuast manifold and custom intake (So the piping comes from the right instead of left and over the top of the engine - easier for a front mount intercooler) be awesome ... *drool*. Anyone know how much dosh that would cost? ;D
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Post by superturbocompound on May 16, 2007 1:20:50 GMT 11
custom extractors are made for tunning the pulse wave of n/a engine,in a turbo engine however this is used for preventing the exhaust pulse from one cyclinder to go to another,look at the log style,which share the same common pipe,the reason that this can be used on a diesel efficiently is because the exhaust cams to not over lap between one another so much to restricc the flow(still with me?)the use of an extractor can benefit the engine in a number of ways,first,you can direct the exhaust pulse more straight unlike the log which has to make a 90 degree turn,secondly it can prevent exhaust going to another port which is about to open,thirdly the length can be made the same so as to make the exhaust pulsating at the same time.there are "don't"in designing an extractor, the pipes used shouln't be too big,its slows down the exhaust,it also cools down the exhaust reducing the strength of the exhaust energy due to large surface area,(exhaust pressure exiting the engine is not from the piston pushing the exhaust but from the high pressure from combustion heat)the length shouldn't be too long due to more surface area too,further more there is no need for long length becasue of the lack of exhaust over lap between cyclinders,the shorter it is ,the better in this case.
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tealz
Isuzu Baby
Posts: 48
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Post by tealz on Oct 22, 2007 1:54:12 GMT 11
Has anyone thought off using something like this as a manifold?  |
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Post by geeves on Oct 22, 2007 18:52:24 GMT 11
looks lovely. Do you have a website for them?
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tealz
Isuzu Baby
Posts: 48
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Post by tealz on Oct 23, 2007 5:02:25 GMT 11
You can buy so many different types and sizes. They are for Jap turbo motors like Nissan SR20det, Mazda MX5 turbo, Evos, Honda B18C etc. It wouldn't be hard to get them to bolt up. As long as you had enough room to plumb into the top mount intercooler. They look good and I'm sure they could help with turbo spool up time.
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tealz
Isuzu Baby
Posts: 48
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Post by tealz on Oct 26, 2007 3:41:30 GMT 11
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tealz
Isuzu Baby
Posts: 48
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Post by tealz on Oct 26, 2007 3:42:10 GMT 11
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Wouldn't a custom larger exhuast manifold and custom intake (So the piping comes from the right instead of left and over the top of the engine - easier for a front mount intercooler) be awesome ... *drool*.