XF Turbos - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

blueovalxfboy · 10-17-2003, 23:55

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

ebxr8240 · 10-18-2003, 04:07

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

http://www.turbomustangs.com/index2.htm

BLWNEB · 10-20-2003, 06:34

full rebuild with forgeis, drop the comp to about 8.3, easy run 25pounds t4 turbo, 3speed c10 3500 stall 3.7lsd, easy 11s

blueovalxfboy · 10-20-2003, 21:06

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

not ford · 10-21-2003, 02:56

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.

BLWNEB · 10-22-2003, 02:21

thats intercooled front mount, dont even bother with those boxes, go the auto, 3 speed they are stronger.

blueovalxfboy · 10-23-2003, 01:46

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

xf6250 · 10-25-2003, 21:46

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

ebxr8240 · 10-25-2003, 23:14

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!!!!

all4ford · 10-26-2003, 00:40

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