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Old 06-24-2004, 21:19   #1 (permalink)
1974 xl tc 250 cortina
 
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cross flow LPG turbo in tc cortina!

I have a 250 tc cortina, pre xflo, on gas, 3 spd bw auto, 2.77 open centre diff.

I want to turbo it. I am pretty sure I need to scrap the pre x flo and sling in an x flo.

So what x flow is best suited for the turbo application? (cast iron, alloy head etc)

I want to run a GRA throttle body and twin convertors. Can you use an intercooler with this set up?

Do you recon there is a better/cheaper way?

What turbo would be best? I need a larger one as I want the boost to start at 2500-3000 so I can still cruise around on the street off boost most of the time. Then get a big hit when boost comes on.

What would be the max boost without touching the internals? Im thinking about 5-7 psi?

I want to run a very mild turbo set up for awile (2-3 years), get used to it save some cash and then go all out. (300+rwkw).

Can you tell me everything I will need? I know about turbo, external wastegate, custom exhaust manifold, intercooler, oil lines, all connecting piping, bov. I am sure I have missed a few things.....

i have done a search on x flo turbos but I still want to know more. Especially anything and everything about LPG turbos!

any help is much appreciated thanks,
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Old 06-25-2004, 23:27   #2 (permalink)
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Re: cross flow LPG turbo in tc cortina!

I can't answer everything here, you'll have to search, but having a big turbo/low compression to give the big kick when the turbo kicks in gets a bit frustrating after a while(esp. on the street). With the 2.77 diff, you'll get blown away off the mark by a lot of cars- once you get going it might be alright, but can you afford to race people up to 160km/h all the time? You're better off having a more responsive set-up for the street, and 9 times out of 10 you'll go quicker anyway.
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Old 06-26-2004, 00:54   #3 (permalink)
1974 xl tc 250 cortina
 
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Re: cross flow LPG turbo in tc cortina!

[QUOTE=shano6]having a big turbo/low compression to give the big kick when the turbo kicks in gets a bit frustrating after a while(esp. on the street). With the 2.77 diff, you'll get blown away off the mark by a lot of cars- once you get going it might be alright, but can you afford to race people up to 160km/h all the time? QUOTE]


yeah I see what you mean, it might be better having boost come on at around 1500-2000. I wont be running the 2.77 diff either. Hopefully Ill have a 3.23 disc brake lsd from an ed xr 6.

I have been giving a whole lot of thought to turboing the pre-crossflow now. Why, you ask? It would be something a bit different, though I am sure it has been done before. And I already have that motor bolted to the car!

Would I be able to get the same amount of power from the pre-crossflow as the crossflow, for the same amount of money? Would using the 2v head offer any advantage? I would be using the lpg set up again. Are there any forseeable problems I might encounter doing the pre-crossflow turbo?

What would you guys recommend, using the pre x flo or the xflo?

Thanks for the help.
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Old 06-26-2004, 15:53   #4 (permalink)
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Re: cross flow LPG turbo in tc cortina!

I would personally use the alloy head x-flow, as they flow well stock, parts are easier to come by, and they're about 20kg lighter. The 2V head is apparently quite good though- maybe talk to a gas expert about the diff. heads and see what they think.
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Old 06-27-2004, 02:02   #5 (permalink)
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Re: cross flow LPG turbo in tc cortina!

go the x-flow alloy head no question ask as they are lighter flow heaps! beta and allready have hardened valve seats

for a low psi set up like that u could have the turbo spooled up in no time u could possibly use a vg30det turbo or even one of a rb25det u could still make 180+rwkw and there also cheap
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Old 06-30-2004, 19:22   #6 (permalink)
1974 xl tc 250 cortina
 
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Re: cross flow LPG turbo in tc cortina!

Thanks for the replies. It looks like I will be going the alloy head crossflow. I was thinking of using a GT40. Like off the xr 6 turbos. Do you recon that would be a good size? They are expensive though arnt they?

Any other help or info on crossflow lpg turbos would be much appreciated.

thanks
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Old 07-01-2004, 05:09   #7 (permalink)
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Re: cross flow LPG turbo in tc cortina!

Quote:
Originally Posted by thek
Thanks for the replies. It looks like I will be going the alloy head crossflow. I was thinking of using a GT40. Like off the xr 6 turbos. Do you recon that would be a good size? They are expensive though arnt they?

Any other help or info on crossflow lpg turbos would be much appreciated.

thanks
Mate i am in the process of doing a similar set up myself at the moment, using some of shano6's old gear and I would be more than willing to help out as much as i can. I will tell you right now, that a GT40 will be damn big ( considering they make 240kW at very low boost ) and very very very expensive... There's no reason why a T04 at around 9-10 psi, with the right cam and induction can't make 200kW at the wheels which is a helluva lot for a cortina
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Old 07-01-2004, 06:01   #8 (permalink)
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Re: cross flow LPG turbo in tc cortina!

GT 40's are $2700 at gcg...
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Old 07-01-2004, 18:24   #9 (permalink)
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Re: cross flow LPG turbo in tc cortina!

Quote:
Originally Posted by ebxr8240
GT 40's are $2700 at gcg...

Not any more... I just went and bought them all off him with the spare change in my pocket
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Old 07-01-2004, 18:33   #10 (permalink)
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Re: cross flow LPG turbo in tc cortina!

not meaning to pinch your thread so the XR6T's run the GT40 then??

thats what i want :)

On the LPG set-up i doubt that you would need twin convertors?

Source the volume of a few of the larger convertors around.. i'm sure the cfm of some of those would be ample for a HI-Po 6
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