top end - 2003-04 Mach 1 Registry Owners Club

RealFord89 · 02-07-2014, 07:32 PM

My car is all stock minus JLT intake with 84,xxx miles. It seems to run out of steam around 5,500 rpm but pulls hard from 3,000-5,500ish. Is that normal? I know these cars are set up for low end torque. What Mods improve top end power with out killing bottom end?

mach1z · 02-07-2014, 08:34 PM

headers! cheapest and easiest + a tune.

Thor · 02-07-2014, 08:40 PM

Quote:

Originally Posted by mach1z

headers! cheapest and easiest + a tune.

Depends on who's doing the tune...

na svt · 02-07-2014, 10:39 PM

The only way to add significant power up top is wit cams aor a centri.

RealFord89 · 02-08-2014, 06:36 PM

I eventually want to add boost ie- centri or eaton swap. But right now that doesnt fit the budget. I want to do small upgrades in the mean time like exhaust, injectors, coils, some suspension (upper and lower control arms, sway bars, strut braces, remove isos.)

Mach828 · 02-08-2014, 06:48 PM

Headers help with top end. The brands with larger primaries help the most but are also the most expensive. Good mod if you can install yourself otherwise its pretty pricey.

On a budget id get a midpipe, gears, and tune. Then save up for boost.

Sent with a shot of DROID go fast

RealFord89 · 02-08-2014, 07:42 PM

Thank you 828. I dont want to do gears though, I like my decent gas mileage.

4valve 4tw? · 02-08-2014, 11:00 PM

The curve of any motor(without variable valve timing) is pretty set. Yes, 1 7/8" primary headers will help up top, but otherwise you have to address how your motor's parts use incoming air. That would be your intake manifold, heads, and cams. Heads seem to be fine even for higher hp builds, but your intake manifold and cams are what give you that low end torque. A used, shortened intake and used 96-98 cobra cams are a fairly budget friendly start to more top end.

That being said, move your power curve up in the rpm range, and you'll have to bite the bullet on gears. Less low end, means you need to stay in the upper rpm range to compensate, which means you need 3.90+ gears.

mach1z · 02-09-2014, 06:58 AM

Quote:

Originally Posted by RealFord89

Thank you 828. I dont want to do gears though, I like my decent gas mileage.

Not gonna win that way!

Bill Hamilton · 02-09-2014, 08:05 AM

Quote:

Originally Posted by RealFord89

My car is all stock minus JLT intake with 84,xxx miles. It seems to run out of steam around 5,500 rpm but pulls hard from 3,000-5,500ish. Is that normal? I know these cars are set up for low end torque. What Mods improve top end power with out killing bottom end?

Motor may be getting a little "tired". When they were new they'd pull like crazy another 1,000 rpm than that and relined at 6800.

falcongtho3 · 02-09-2014, 10:01 AM

I agree with Bill. I shifted out on track at 6 grand and Scott Hoag even suggested trying 6300-6500, although I found it fall off after 6.

OWmach1 · 02-09-2014, 12:24 PM

Quote:

Originally Posted by Mach828

On a budget id get a midpipe, gears, and tune. Then save up for boost.

Sent with a shot of DROID go fast

this

02-07-2014, 07:32 PM	#1
RealFord89 HOOAH! Join Date: Sep 2013 Location: Fort, Gordon GA / JAX, FL Posts: 173	top end My car is all stock minus JLT intake with 84,xxx miles. It seems to run out of steam around 5,500 rpm but pulls hard from 3,000-5,500ish. Is that normal? I know these cars are set up for low end torque. What Mods improve top end power with out killing bottom end? __________________ 2003 DSG Mach 1. "MODS": JLT RAI, MAC cat-back, MGW Shifter, FRPP aluminum DS, Accel Super COP's, Chrome 18"x9" 00' Cobra R's, tinted rear side reflectors, tinted sequential tails w/ Raxiom modified flasher, led license lights, black reflective bumper insert letters, flame grille pony.

02-07-2014, 08:34 PM	#2
mach1z Registered User Join Date: May 2005 Location: Woodstock,GA Posts: 544	Re: top end headers! cheapest and easiest + a tune. __________________ I/E, 4:10's, tune

02-07-2014, 10:39 PM	#4
na svt Registered User Join Date: Dec 2007 Location: beavercreek, oh Posts: 4,695	Re: top end The only way to add significant power up top is wit cams aor a centri.

02-08-2014, 06:36 PM	#5
RealFord89 HOOAH! Join Date: Sep 2013 Location: Fort, Gordon GA / JAX, FL Posts: 173	Re: top end I eventually want to add boost ie- centri or eaton swap. But right now that doesnt fit the budget. I want to do small upgrades in the mean time like exhaust, injectors, coils, some suspension (upper and lower control arms, sway bars, strut braces, remove isos.) __________________ 2003 DSG Mach 1. "MODS": JLT RAI, MAC cat-back, MGW Shifter, FRPP aluminum DS, Accel Super COP's, Chrome 18"x9" 00' Cobra R's, tinted rear side reflectors, tinted sequential tails w/ Raxiom modified flasher, led license lights, black reflective bumper insert letters, flame grille pony.

02-08-2014, 06:48 PM	#6
Mach828 Dark Knight Join Date: Nov 2009 Location: Albuquerque, NM Posts: 5,759	Headers help with top end. The brands with larger primaries help the most but are also the most expensive. Good mod if you can install yourself otherwise its pretty pricey. On a budget id get a midpipe, gears, and tune. Then save up for boost. Sent with a shot of DROID go fast __________________ Vortech V2 S-trim, E85, A2A Treadstone, Comp cams, built engine, full exhaust, built rear, built 4r70, more mods. Tuned by me with SCT Advantage

02-08-2014, 07:42 PM	#7
RealFord89 HOOAH! Join Date: Sep 2013 Location: Fort, Gordon GA / JAX, FL Posts: 173	Re: top end Thank you 828. I dont want to do gears though, I like my decent gas mileage. __________________ 2003 DSG Mach 1. "MODS": JLT RAI, MAC cat-back, MGW Shifter, FRPP aluminum DS, Accel Super COP's, Chrome 18"x9" 00' Cobra R's, tinted rear side reflectors, tinted sequential tails w/ Raxiom modified flasher, led license lights, black reflective bumper insert letters, flame grille pony.

02-08-2014, 11:00 PM	#8
4valve 4tw? Registered User Join Date: Aug 2011 Location: Parkesburg, PA Posts: 1,084	Re: top end The curve of any motor(without variable valve timing) is pretty set. Yes, 1 7/8" primary headers will help up top, but otherwise you have to address how your motor's parts use incoming air. That would be your intake manifold, heads, and cams. Heads seem to be fine even for higher hp builds, but your intake manifold and cams are what give you that low end torque. A used, shortened intake and used 96-98 cobra cams are a fairly budget friendly start to more top end. That being said, move your power curve up in the rpm range, and you'll have to bite the bullet on gears. Less low end, means you need to stay in the upper rpm range to compensate, which means you need 3.90+ gears.

02-09-2014, 10:01 AM	#11
falcongtho3 Moderating at Mach 1 Join Date: Aug 2002 Location: Baton Rouge, La. Posts: 16,274	Re: top end I agree with Bill. I shifted out on track at 6 grand and Scott Hoag even suggested trying 6300-6500, although I found it fall off after 6. __________________ Krewe de la Mach Rouge #340804 13th Mach 1 built 11/07/02 Build Date 12/13/02 Delivery

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