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N/A To Turbo Conversion

Started by Shaun_VL · 2 Feb 2009 · 137 replies

Preserved from CalaisTurbo. Original authors and dates are shown; archived members are not current Holdcom accounts. View original archive ↗

RobVL5spdArchived member
Wouldn't you need to decompress the engine ?
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woodyotoaArchived member
i have just a standard setup, T3 lowmount standard intake with cross-over pipe (no cooler) and easly runs 7 psi on standard ECU and injectors if this helps ya oh this is still on a N/A engine with no de-comp plate
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KLR-747Archived member
Has someone got a pic of what the factory oil & water lines look like? Is this them? Some original photos have not been recovered yet.
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vltrb-0Archived member
Quote: Originally Posted by KLR-747 Has someone got a pic of what the factory oil & water lines look like? Is this them? bottom line looks right for water, top line is a fail. i've never had a line with the distributor block on it but that doesn't mean it wont work Some original photos have not been recovered yet.
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KLR-747Archived member
According to holmart the top one is a NOS holden item for the vl turbo?? So the bottom one is the right one and i wont have any problems with it?
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woodyotoaArchived member
the top one is oil feed for the standard T3, it looks identical to the one i pulled off my turbo when i upgraded to braided :P
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KLR-747Archived member
thanks man thats all i needed to know Some original photos have not been recovered yet.
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MB_BoyArchived member
im about to drop a turbo motor into my n/a and i jst wanted to know if a turbo wiring loom is needed along with the turbo ecu or can the n/a wiring loom be used? cheers
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abrowne70Archived member
you can use a N/A wiring loom mate, easy as
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Wkd_VlArchived member
yes but then you wont have the knock sensor
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m4vr1kArchived member
Hate to dig up an old thread, but a few people have asked how much boost is safe to run on an n/a to turbo conversion, but there hasnt really been a definitive answer. I am in the middle of doing this exact conversion, and would like to know, I will be running a Bosch 044 pump, R32 GT-R injectors, a Nistune ECU and a T3/T4 on a S2 motor with no decompression plate, but a turbo head gasket. The motor has done 135,000km also. Cheers Zac
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ekulArchived member
m4vr1k The turbo headgasket would proberly be 1mm, so it would drop your compression to something in the high 8's, you can do it, but I would proberly only push something like 10psi, and look into finding the best nistune tuner you can find, to make sure theres no detination as that will be cruicial. If i was you, i would put in a 1.9mm cometic headgasket onto it to drop the compression down more, then you can run more boost, while it being more safter, and knowing the headgasket wont go pop.
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m4vr1kArchived member
Evening Calaisturbo, once more. I must admit to a bit of confusion, with regards to the high pressure/low pressure fuel pump setup on the VL. As my car is simply an Executive, with the 3 liter N/A engine, do I need to replace both of these units? or am I able to simply upgrade the high pressure (in tank) with a good brand, high performance pump, and take out the low pressure pump altogether?
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BS-86VLArchived member
hey mate doin the same thing to my rb30 do i need a decopretion plate and if so at wat pound boost could i get away with no decopretion plate
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malpasoArchived member
Quote: Originally Posted by m4vr1k [View Post] Evening Calaisturbo, once more. I must admit to a bit of confusion, with regards to the high pressure/low pressure fuel pump setup on the VL. As my car is simply an Executive, with the 3 liter N/A engine, do I need to replace both of these units? or am I able to simply upgrade the high pressure (in tank) with a good brand, high performance pump, and take out the low pressure pump altogether? you can get away with running the standard pumps with low boost for a while, i did and didn't run into any problems. but if you're looking to throw more power at it then a better fuel system is recommended Quote: Originally Posted by BS-86VL [View Post] hey mate doin the same thing to my rb30 do i need a decopretion plate and if so at wat pound boost could i get away with no decopretion plate learn to spell and you might have more luck again it is not needed unless more power/boost is going to be your aim a "decompression" plate is not needed for a standard setup
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Shaun_VLArchived member
Hey guys Personally I wouldn't bother with a decomp plate unless the head gasket itself blows. There is no point pulling it all down for something that might not need doing for a year or even two. If you don't thrash your car everywhere then it should last. As for boost I would say 12 psi would be max but I wouldn't run it daily. I used to run 9psi on low and 12psi on high and I had it for over and year it is has never had any problems As for fuel, the stock pumps are fine for standard, you will no if you need a upgrade. When I was looking at upgrading my fuel system I was just going to get rid of the external fuel pump and stay with the internal and just replace it to a walbro pump. 6boost suggested this to me and said it has enough power to run high performance vehicles with just the single in tank pump[COLOR="Silver"]
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TomoArchived member
[QUOTE=Shaun_VL;2518806]Hey guys Personally I wouldn't bother with a decomp plate unless the head gasket itself blows. There is no point pulling it all down for something that might not need doing for a year or even two. If you don't thrash your car everywhere then it should last. As for boost I would say 12 psi would be max but I wouldn't run it daily. I used to run 9psi on low and 12psi on high and I had it for over and year it is has never had any problems meh iv been running 15-17psi (gt35) daily, loves it. havent had any problems either.
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Shaun_VLArchived member
Yeah it is a bit of hit and miss really. I personally would rather be safe than sorry. That's why I didn't want to go over 12psi.
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VL_Aero23Archived member
hey if you have a plenum for a front mount cooler would u need the cross over pipe ??
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jjjjjjjjjArchived member
nice very in depth and helpful
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