turbocharging a 250 crossflow in a cortina

[Anonymous]

I have a TE cortina with a 250 crossflow which is stock except for the allow head (ZK EFI) and performance springs retainers etc and also a crow cam 14471 which is similar to a stock cam. It's running straight gas using the gas research setup on a stock ford twin barrel carb manifold. Also running pacemaker extractors. Gearbox is the standard cortina 4 speed, and also have a 2.77lsd diff. Finally to the question Iam thinking of turbocharging the car and running low boost 7-10psi and changing the extractors to a turbo exhaust manifold, probably modifying the standard manifold. I have talk to a few turbo places and they recommend either a T03/T04 combination or a T04. Does anyone think this is overkill, as Iam not looking at really big horsepower levels, probably looking at 200 or so horsepower. I was thinking of using a T03 from a VL commodore, has anyone done this and what results did u get. Any help will be greatly appreciated.

 

[Anonymous]

Corty 80
I not sure why you want a turbo if you only looking at around 200 hp. You would get this easily with a bit more cam and it would be very drivable and much cheaper to do.
Im still waiting for funds to come through but Im wanting to make my Cortina a 6 or 7 second car 0-62mph. Im now hoping to do this with a cam of about 214/224 at 50 and not rev past 4600 4700 rpm
You could probably get a turbo to produce tons of tire spinning power under 4000rpm and still peak at about 200 hp but Im not sure I would go this way.
Id be looking at 250-300 Hp from a turbo set up before I thought it viable

 

[Anonymous]

Sorry Im not sure If more cam would work with your gas. Best to ask someone who knows.

 

[Anonymous]

Well Tim I know I could get 200hp with a cam and some headwork, its got 105rwhp atm, but the problem lies with the diff gears 2.77lsd which I dont really want to change, got it recoed not long ago, plus the gas is also a issue. So to do it natuarally aspirated Iam looking at doubling the power, which would mean that it wouldnt be as streetable, as it is you can hear it sucking the air through the gas research carby which is fairly big, about the size of a xf efi throttle. Another issue being straight gas the economy isnt the best, I know u cant have power and economy, but being worked it will be using the same all the time. With a turbo for generally driving it would be the same as now, only when u put the foot down will it suffer. As for the 200hp thats just a rough about. Where I got my car dynoed there was a turbo gas xf which got 200rwkw or around 250hp with a T03 turbo, so with a similar setup and different gears I should get 200hp+
As for the legallity of turbo because of the straight gas the only issue is the brakes, which Iam upgrading using the AU3 falcon kit from hoppers stoppers.

 

[Anonymous]

VL Commodore turbos would be ideal for your diff ratio - they begin to spool up low on the RB30ET, something like 1600-1800rpm, and wind out to 5500rpm. Factor in a 25% larger engine, and it starts to suit your driving targets. Turbo Nissan sixes make something like 150kW out of the box, on mild boost. You wouldn't have to wind up more than 6-7lbs to get your hp target, and it would most likely give you a Hurter torque curve, starting from just off idle.

Looking at numbers obtained from standard VL commodores, with modified exhausts and altered boost levels, you'll probably get a maximum of 180-odd rwhp, with a very strong midrange.

Is your diff 2 pinion or 4 pinion?

 

[Anonymous]

Hey disco,

as for the diff dont know if its a 2 or 4 pision as I got it done at a diff joint. Also I got extractors and the exhaust has been done, has a 2 1/4 inch sports system.

 

[Anonymous]

hey corty80 i have a coulpe of turbo manifolds in stock to suit 250 xflow i'm selling them for $1100 each. there brand new and flow very well. so if your interested get back to me.

mts

 

[Anonymous]

Hey MTS-250turbo,

where abouts in Australia are you and do you have the non extractor type manifolds and what turbo are these for T03/T04? Do you have a manifold like this http://members.optushome.com.au/corty80 ... nifold.htm

 

[Anonymous]

Hey MTS-250turbo,

sorry problem with the link, this is the correct one http://members.optushome.com.au/corty80 ... nifold.htm

 

[Anonymous]

You could use a VL commodore turbo but the turbine housing on those is quite restrictive being a 0.63 AR or thereabouts. A better option is to try and find an RX7 turbo with a 1.00 A/R turbine housing. You can probably bolt a stock RX7 turbo on and make the power you are looking for. To be honest you will have great difficulty keeping the power below 200 rw hp.

The good thing with the RX7 turbine housing is they are big enough to cram an O or P trim turbine wheel in later on if you're feeling like making more power and you can run a V trim or 60-1 compressor side which would be good for as much as 500 hp with a modified and ported internal wastegate.

My small trim turbo was making 265 rw hp at 3000 rpm on 7 - 8 psi boost!

I assume you don't want to decompress the engine?

 

[Anonymous]

hey corty80 the manifolds are extractor type