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Old 10-17-2003, 23:55   #1 (permalink)
XF 250 4.1 XFLOW TURBO
 
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XF Turbos

I was wondering if anyone could help me with a turbo for an xf 4.1 250 XFLow EFI with an alloy head i am looking to run about 15 to 20 psi and about 400 to 500 HP
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Old 10-18-2003, 04:07   #2 (permalink)
Two SC 61's = trouble
 
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Re: XF Turbos

Compression will need to be lowered to around 8.5..
check this site...

http://www.turbomustangs.com/index2.htm
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Old 10-20-2003, 06:34   #3 (permalink)
I Love Forced Induction.
 
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Re: XF Turbos

full rebuild with forgeis, drop the comp to about 8.3, easy run 25pounds t4 turbo, 3speed c10 3500 stall 3.7lsd, easy 11s
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Old 10-20-2003, 21:06   #4 (permalink)
XF 250 4.1 XFLOW TURBO
 
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Re: XF Turbos

Blwneb is that intercooled or not and how would a T5OD borgwarner 5 speed gearbox go also i was thinking 2.5 exhaust, extractors, mild cam, port n polish aswell what do you recon
cheers
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Old 10-21-2003, 02:56   #5 (permalink)
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Re: XF Turbos

Quote:
Originally Posted by blueovalxfboy
Blwneb is that intercooled or not and how would a T5OD borgwarner 5 speed gearbox go also i was thinking 2.5 exhaust, extractors, mild cam, port n polish aswell what do you recon
cheers

No borg warner will live a long life behind 400+hp. Extractors are not used with turbos (unless its a windsor V8). You would really need 3" not 2.5" for your horsepower. Porting the head should make it easier to make your hp goals.

For the power range you want the starting point would be a 60-1 compressor on a T4.
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Old 10-22-2003, 02:21   #6 (permalink)
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Re: XF Turbos

thats intercooled front mount, dont even bother with those boxes, go the auto, 3 speed they are stronger.
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Old 10-23-2003, 01:46   #7 (permalink)
XF 250 4.1 XFLOW TURBO
 
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Re: XF Turbos

what about that green xf turbo it runs 500 hp and it has a manual box in it but if not a manual is the factory box in xf ok and if so do i need a shift kit or something
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Old 10-25-2003, 21:46   #8 (permalink)
4.1 XFLOW EFi Turbo
 
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Re: XF Turbos

To make that sort of power, low comp (approx 7.5:1) forgies, cam, head work, big turbo big boost, big injectors, big fuel pumps, aftermarket ecu, big cooler, defenitely an auto with at least a 3200rp, stall converter and at leat 3.45's in the diff
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Old 10-25-2003, 23:14   #9 (permalink)
Two SC 61's = trouble
 
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Re: XF Turbos

Turbo's are not realy hard on transmissions.The driver usually is the fult in things there.Well my T5 held up well with atleast 450 h.p through it..No power shifting though. And why such a high stall if auto? Unless a real big turbo is fitted with way too big A.R ratio [A.R nothing to do with air ratio, it's turbo housing to turbine]Keep things sensable, not too over the top and you'll do fine! Turbo's build TORQUE as well as power so even 400h.p will feel as strong as..Windsor Turbo's don't generally run under 8 to 1 so I guess the 4 Ltr would be similar as combustion chambers should be well worked out on both..It's as much to do with ecu tunning than anything. Like retard as boost comes on etc as well as fuel.. Some coments posted above I must say sound "inmature" please read before posting!!!!
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Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
.
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..
R.I.P Possum...

Last edited by ebxr8240; 10-25-2003 at 23:16.
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Old 10-26-2003, 00:40   #10 (permalink)
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Re: XF Turbos

I was just about to ask why definately auto because i know a turbo car making big power with a ZF 5 speed and it has no troubles
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