setting my car up for a single turbo have some questions - 2003-04 Mach 1 Registry Owners Club

Chances50 · 01-19-2013, 03:48 PM

Im having zero luck selling my mach so ive decided screw it ill mod it.

Its 5 speed car and I currently have stock 3.55's in it. Wanting to go to a steeper gear but have read turbos dont need a lot of gear. I figure since it's still the stock longblock ill stay with a 67-70mm turbo looking for 450-475 for now. Any of you turbo gurus have any advice?

Im also thinking about going to a manual valve body 4r70w. Goal is to run low 11's high 10's.

Roy · 01-19-2013, 04:53 PM

3.55 is perfect.

ScreamingMach46 · 01-19-2013, 08:55 PM

Yeah, keep the 3.55s for the turbo setup.

01cobra · 01-22-2013, 09:45 PM

I've got 3.27's right now with my 70mm. It could use a little upgrade.

I think 3.55's is a perfect gear for a stock bottom end car.

01-19-2013, 03:48 PM	#1
Chances50 Registered User Join Date: Jun 2008 Location: Haskell, Ok Posts: 1,325	setting my car up for a single turbo have some questions Im having zero luck selling my mach so ive decided screw it ill mod it. Its 5 speed car and I currently have stock 3.55's in it. Wanting to go to a steeper gear but have read turbos dont need a lot of gear. I figure since it's still the stock longblock ill stay with a 67-70mm turbo looking for 450-475 for now. Any of you turbo gurus have any advice? Im also thinking about going to a manual valve body 4r70w. Goal is to run low 11's high 10's. __________________ 03 OW 5 speed 84k miles very clean. For sale!

01-19-2013, 04:53 PM	#2
Roy Registered User Join Date: Jul 2005 Location: S.E. Mich. Posts: 3,446	Re: setting my car up for a single turbo have some questions 3.55 is perfect. __________________ https://m.youtube.com/watch?v=xHkA5tBV1RE

01-19-2013, 08:55 PM	#3
ScreamingMach46 Registered User Join Date: Dec 2008 Location: Chicago, IL Posts: 907	Re: setting my car up for a single turbo have some questions Yeah, keep the 3.55s for the turbo setup. __________________ 2004 Mach 1 - Screaming Yellow - 5 speed - IUP - 1 of 624 Full Bolt-ons, Built Rear, NX 100 shot, tune by Tim Barth @ MPH N/A - 12.7 @ 107 (1.70) N2O - 380rwhp 487rwtq 12.03 @ 110 (1.55) SOLD 2004 Cobra - Screaming Yellow - T56 - 1 of 299 KB 2.8H @ 20lbs, 98 Intake Cams, E85, Tune by Tim Barth @ MPH 711rwhp 635rwtq

01-22-2013, 09:45 PM	#4
01cobra Registered User Join Date: Nov 2009 Location: Chester County, PA Posts: 330	Re: setting my car up for a single turbo have some questions I've got 3.27's right now with my 70mm. It could use a little upgrade. I think 3.55's is a perfect gear for a stock bottom end car. __________________ 2003 Cobra

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