Boosting the 4.0L OHC ECM???

[Unfalconbelievable]

Can the stock ECM handle a little help in the air flow department?? I'm only talking about 7-10psi intercooled. If not would the XR6 ECM help as this makes a standard 4.0L run a touch rich. Only thing I'm worried about is ignition retard?

 

[Unfalconbelievable]

Someone must know something or do I just bolt this sucker on and see how well it runs??? T3/4 hybrid, 57 trim .60 compressor and .64 exhaust. Hope it works ok!! just purchased an intercooler on ebay, 450x300x76mm should be just right for this application, not tooooo much preasure drop. Just need info on ECM for go ahead to bolt up. I can raise the fuel preasure by 10psi fairly easy and an XR6 ECM holds the injectors open a fraction longer so I should be able to get the extra fuel. Can the advance be tinkered with in the electronic dizzies because the ECM doesnt do much at all with the timming.

 

[Anonymous]

What module came with this year/engine? EEC-IV? 10psi is a lot more than "a little help" as far as air flow goes. You're gonna need a custom dyno tune or chip.

 

[Unfalconbelievable]

My boss got onto a dude whos done a couple of these. 10psi no worries with the standard ECM with the help of slightly bigger injectors and a little more fuel preasure. turbo will be on in 3 weeks yay yay, thanks for the info anyway, the bloke only just got back to us today, was trying to find out from you guys who've got them on the road for driveablility

 

[Anonymous]

Bigger injectors and a rising rate regulator would be what you're after. Won't be needing the extra fuel until you have some boost. Not that I would have anything this new fangled on the road....

 

[Anonymous]

sounds like you know what you are talking about then, so i wont tell you the cheap ebay special turbo you bought is way too small to run on a 4.0.
Ive lurked on here for a while, and you post things that you seem to allready have your mind set on.
i had a ea with a lpg turbo set up, with a garrett t04b 52mm and .94 p trim.

 

[Unfalconbelievable]

Thanks, we'll see about the turbo, your probably right, if so I've got a mate with toyota that will buy it off me. When I posted the question about the ECM I didnt know anything about them, but my boss got onto a bloke, Rodney Howe, from Howe automotive who has done a couple of 4.0L turbo setups with the standard ECM and gave me some pointers for my setup, along with recomending larger injectors and a better fuel presure regulator. I went with the smaller turbo because i only want 7-10 pounds in this setup, I'd probably be happy with 5 even if it came down to it, just some extra punch for sh!ts n giggles

 

[Anonymous]

so i wont tell you the cheap ebay special turbo you bought is way too small to run on a 4.0

T3/4 hybrid, 57 trim

Well, a "57 trim" will be good to about 300-350 HP - should be a nice kick!!

I keep hearing horror stories about the ssautochrome chinese turbos, so that 57 trim you picked up should be worlds better (if built and balanced correctly)

 

[Unfalconbelievable]

Cheers linc's, should be on in about 3 weeks all going well, then we'll find out, fingers crossed. Yeah i figured the 4.0L is about 200hp standard and with 7-10psi it should get to around 300+ at the flywheel. Thats all I want for my street car, then I can do the XB slowly and properly because I've got a car that goes hard for fun already. Lowerd it yesterday and put on 14X8 inch dragways/cragars with fairly sticky 245's. Looks heaps better. Got turbo, intercooler, boost guage, tacho, boost controller, BOV, larger injectors, rising rate reg and pod filter for it, just waiting for the pipe to start the J-pipe and intercooler ducting. $170 for 6.5 metres of 2.5" 3mm thick mild steel (6.5m was the minimum length i could buy) and $26 a metre for 3" 1.6mm stainless for the ducting. I will post on the results

Thanks all

 

[Anonymous]

We can't even hardly get new 14 inch tyres in the USA anymore...even 15's are hard to find.

I used ex pipe from the scrap pile behind my local muffler shop. Many newer vehicles come standard with stainless exhaust tube from the factory.

 

[Unfalconbelievable]

Does anyone know how hard its going to be to try and bend 3mm x 2.5inch mild stell with the sand bending technique???

 

[xctasy]

Very hard to do well for tight bends, but very cheap if you are not inclinded to rush. The problem is tight bends are impossible to perform well becasue you end up with the otter radius thined out of metal.

Mandrel bending can sort it, but there is still a cost attached, and you still get a change in section.


Best bet is to make two copies out of tube bends of mild steel, and then weld them. If you blow one out, use the spare one. Hepas cheeper.

I've not seen it done, but my next door neighbour said it takes a while to do, and you have to do it bit by bit, spend a good deal of time. High iron pre dried in the oven sand is better than fine silt.


The very best bet is to buy ductile iron tube and add a slipper join. One piece fits into a proprierty bend, and you RTV it up and insert it into another length to get the the turbo and exhast to park in the right place .

One other expensive method I've seen people use is stainless steel bends, and get a specialist to weld the pieces together using the argon gas as a inert gas sheild. Its bunged up at each end with a plumbers pipe bung, and pressurised with argon as the two sections are butted together and welded form the outside. The argon then makes a lovely full fusion weld that is smooth and indestructable.

You get what you pay for.

 

[addo]

There is no way (short of being the bloke who wears red undies on the outside of blue tights) that you are going to be able to bend that thickness and diameter of steel tubing.

Either premade bends or fabrications depending on time, budget and radius. A proper blacksmith or ironmonger could cut the pipe into a few pieces, beat into a rough curve and re-weld. But it would be pretty shaggy inside and that may not help flow.

 

[Anonymous]

What is the Australian term for someone who refuses to spend money unless absolutely necessary?

Well, that is me!! Do you have access to a welder? The method of "cut scrap pieces and weld at proper orientation" has worked for me for years (as youcan see in my turbo 200 thread ).
I have never hired a shop to do my exhaust systems.

 

[addo]

"Tightarse" is probably the closest. Desirably prefixed to an associated country of origin and questionable ancestry. As in : "It's that tightarsed Pommy/Kiwi/wog/Yugo bâtard again"...

 

[Anonymous]

Call me what you will - - my set up is welded together from second hand pieces and bits!

 

[xctasy]

"Tightarse" is probably the closest. Desirably prefixed to an associated country of origin and questionable ancestry. As in : "It's that tightarsed Pommy/Kiwi/wog/Yugo bâtard again"...

Scare bleu!

 

[Unfalconbelievable]

Well I quit work at my old place and started at a new place a couple of weeks ago, as you do. It so happens that my new mechanical workshop is backed onto a commercial airport hanger (read, I open the back door that leads to the toilet and knock myself out on a wing!). I'm going to try n get matey with a couple of the aircraft techs and c if they'll bend it for me for a carton of beer. If not I'll have to pay someone to do it. Although, I had to buy a length which is 6.5 metres and I'll only need about 2 metres, so I'm not short of pipe to experiment with. What if I bend it seperately with heat and compacted sand like i was going to but in pieces, i.e making a 90 deg bend and cutting it of just after the bend then making another one and then welding the two together, and get a diegrinder in there 2 clean it up a bit? Or maybe 45 deg bends would work better because then theres room for the diegrinder between performing each weld to clean up. I cant see why this wont work, it'll just take a while to get the pipe hot enough to bend

 

[addo]

If you've got a good saw there, probably a segmented turn of 5 or so pieces per 90° would be pretty slick.

As to our inveterate Texan ( ) I saw a place that was photoworthy - will have to go back with a camera: "Linc's Barbecues and Heating"... Isn't that you and your intercooler?

 

[Anonymous]

1) If you've got a good saw there, probably a segmented turn of 5 or so pieces per 90° would be pretty slick.

2) I saw a place that was photoworthy - will have to go back with a camera: "Linc's Barbecues and Heating"

1) The "cut pie wedges and re-weld" method is too hard and makes turbulent bends. Get the right bends made or not at all.

2) googled it - They are in NSW!! Hahaha!
Nice to know I have a winter home in Oz!