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Turbo delay can anyone help??
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Old 22 Apr 2005, 11:40 PM   #1 (permalink)
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Turbo delay can anyone help??

Hi i had my import wrx wagon for two days before someone f**ked my crank :cry:

When i did have it for those 2 days it was running fine and the turbo used to kick in at around 2 & half rpm, what i have done is brought another engine with was out of an 1995 subaru RA and it had a bigger turbo on. The engine is in the car and is running fine but the only thing i dont like is that the TURBO IS KICKING IN AT 4000 RPM why is it kicking in alot later? also is there any way of making the turbo kick in sooner cheers mushy.
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Old 23 Apr 2005, 10:29 AM   #2 (permalink)
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I think 4000rpm is about right m8

Strange your other one kicked in strong as low as 2500rpm
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Old 24 Apr 2005, 03:33 PM   #3 (permalink)
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depends on the age of your car and the donor engine but the turbo's should of been the same, unless someone has been swapping stuff around..........
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Old 24 Apr 2005, 09:14 PM   #4 (permalink)
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Well I can tell you now that the WRX Wagon would have been running on the TD04 Turbo (smallish Turbo with a quick spool) and the RA 's had the larger TD05 Turbos fitted to them This means that the Turbo is larger and whilst you get a lot more kick when it comes into play it will take longer to spool up.

When changing up in size of Turbos a Remap etc. is the best thing to do because your current ECU will be fuelling etc and expecting the TD04 not anything bigger

I hope this helps ?
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Old 24 Apr 2005, 10:41 PM   #5 (permalink)
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Quote:
Originally Posted by Nelson
Well I can tell you now that the WRX Wagon would have been running on the TD04 Turbo (smallish Turbo with a quick spool) and the RA 's had the larger TD05 Turbos fitted to them This means that the Turbo is larger and whilst you get a lot more kick when it comes into play it will take longer to spool up.

When changing up in size of Turbos a Remap etc. is the best thing to do because your current ECU will be fuelling etc and expecting the TD04 not anything bigger

I hope this helps ?
hi i checked the turbo on the old engine and it is a TD04 like you said and the one on the car at the moment is a TD05, I was thinking of puting the old turbo back on but is the any other way of getting the turbo to kick in a little faster? How much would it cost to get the ecu remaped? any ideas are more them welcome.
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Old 25 Apr 2005, 08:27 AM   #6 (permalink)
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You can't remap the standard ECU from that year. You will need an aftermarket one, or a piggyback ECU. Expect to pay at least 750 including mapping (unless you can get a really cheap used one).
You could opt for the alternative and buy an ECU which is from a car that runs the TD05.

NOTE: The TD05s are sought after turbos. and normally fetch at least 250.

The TD04 will limit you on top end power. You will also notice the TD05 has a 90 Degree intake, whereas the Td04 is front entry. Unfortunately, you can't just swap them over.

What do you mean someone broke your crank? Was it their fault or did it just happen (as it often does)?
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Old 25 Apr 2005, 08:28 AM   #7 (permalink)
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The TD05 Turbo is a good one mate and has a lot more puff top end so to speak unfortunately the down side is it takes longer to spool

OK as for what you can do about getting it to spool quicker - well you could fit a Boost Controller to the car to take the management of the boost away from the ECU. Otherwise you could fit a replacement ECU or something like a Unchip which is a piggy back ECU. A manual boost controller will cost you about 30ish - an electronic controller will be more in the region of 200 plus it is always best practice to have one of these set up by a tuner who knows what hes doing. Otherwise a replacement ECU is big money more like 500 upwards. You have one of the earlier Scoobs and to my knowledge they don't do a Remap for the early ones Otherwise just refit the original Turbo - if its a faster 'spool' you want then I can only suggest you go back to the original
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Old 25 Apr 2005, 04:47 PM   #8 (permalink)
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Quote:
Originally Posted by highlander68k

What do you mean someone broke your crank? Was it their fault or did it just happen (as it often does)?
My mate was driving my car at 100mph in 4th gear and he desided to drop it in 3rd and pop went the crank as far as i am aware because the bottom end start knoking as he was driving it and there came a very big bill for me.
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Old 25 Apr 2005, 04:51 PM   #9 (permalink)
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Originally Posted by Nelson
The TD05 Turbo is a good one mate and has a lot more puff top end so to speak unfortunately the down side is it takes longer to spool

OK as for what you can do about getting it to spool quicker - well you could fit a Boost Controller to the car to take the management of the boost away from the ECU. Otherwise you could fit a replacement ECU or something like a Unchip which is a piggy back ECU. A manual boost controller will cost you about 30ish - an electronic controller will be more in the region of 200 plus it is always best practice to have one of these set up by a tuner who knows what hes doing. Otherwise a replacement ECU is big money more like 500 upwards. You have one of the earlier Scoobs and to my knowledge they don't do a Remap for the early ones Otherwise just refit the original Turbo - if its a faster 'spool' you want then I can only suggest you go back to the original
Are you sure that i can but the old turbo back on because highlander68k said they are at 2 different angles so whos right?
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Old 25 Apr 2005, 05:00 PM   #10 (permalink)
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I am right. Unless the TD05 is a modified front entry one

Otherwise you have to swap the manifold, or do some other silly stuff.



TD04 on the left, TD05 (standard) on the right.
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Old 25 Apr 2005, 08:06 PM   #11 (permalink)
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Originally Posted by highlander68k
I am right. Unless the TD05 is a modified front entry one

Otherwise you have to swap the manifold, or do some other silly stuff.



TD04 on the left, TD05 (standard) on the right.
Thanks for the picture mate,keeps me a better idea now.
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Old 25 Apr 2005, 08:09 PM   #12 (permalink)
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Originally Posted by highlander68k
I am right. Unless the TD05 is a modified front entry one

Otherwise you have to swap the manifold, or do some other silly stuff.



TD04 on the left, TD05 (standard) on the right.
Thanks for the picture mate,keeps me a better idea now.
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Old 26 Apr 2005, 06:20 PM   #13 (permalink)
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4000 rpm sound OK too.

Maybe you should try the "turbodiesel-technique', i.e. burry the accelerator before depressing the clutch when you shift up. I used to do that with my wife's C5 2.0 HDi Estate :roll: (that was before she got the STi).

Just be careful to not hit anybody from behind. The car might accelerate faster than you do :wink:
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