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Author
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Topic: car feels sluggishafter gt40 heads and explore manifold
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FOXX5.0
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Member # 9094
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posted
 
 
So after installing gt40 heads off 94/95 cobra and explore manifold the car feels like it's holding back in power timing is set at 12 I did notice the TFI module position is diff then my friends mustang that's timed the same at 12
idk if that matters
Car is a 1990 mustang 5 speed
Stock air box
Stock injectors
Stock headers
Parts list of the car
Gt40 heads(stock roller rockers)
E303(idk if it was degreed)
Explorer manifold
65mm throttle body
X pipe no cats
Double roller timing chain
New plugs
New wires
It feels really slow any info would be greatly appreciated
Posts: 1555 | From: (~__~) | Registered: Apr 2009
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93 5.0
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Member # 12418
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posted
I have the same set up but I have a cold air and long tubes and mine doesn't feel slow maybe you need more air flow to help them
Posts: 230 | From: 209 | Registered: Sep 2012
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FOXX5.0
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Member # 9094
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posted
My last 93 with full exhaust and 355 gears pulled way harder then this one did maybe my stock gears are not helping either
Posts: 1555 | From: (~__~) | Registered: Apr 2009
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CoyoteMike
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Member # 13748
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posted
quote:
Originally posted by FOXX5.0:
So after installing gt40 heads off 94/95 cobra and explore manifold the car feels like it's holding back in power timing is set at 12 I did notice the TFI module position is diff then my friends mustang that's timed the same at 12
idk if that matters
Car is a 1990 mustang 5 speed
Stock air box
Stock injectors
Stock headers
Parts list of the car
Gt40 heads(stock roller rockers)
E303(idk if it was degreed)
Explorer manifold
65mm throttle body
X pipe no cats
Double roller timing chain
New plugs
New wires
It feels really slow any info would be greatly appreciated
I would check compression, makes sure the gaskets are ok
Maybe throw some more timing at it and see how it responds? (just watch for ANY detonation)
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Racist, bigot Michael Ford / Mike Ford aka FiveOhMike of 2039 XXXXXXXy XXX Livermore, CA 94551, DOB Nov 3X, 1980 925-XXX-6667 and Director at Midokura Corp has been banned for continual threats of violence against other members, half a dozen fake accounts, lying to police to implicate CAFords and other shameful acts of revealing character. He is reported to be well armed and regularly spotted at the Dublin/Pleasanton BART station.
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2013 GT 5.0 Coupe
2014 Focus ST
2015 Buick LaCrosse Premium
Posts: 580 | From: Livermore, CA | Registered: Sep 2014
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FOXX5.0
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Member # 9094
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posted
Thanks I'll give it a try
Posts: 1555 | From: (~__~) | Registered: Apr 2009
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Marks93
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Member # 11130
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The 3.55's will help considerably. How's your exhaust system? Cats clogged? What kind of mufflers?
When I first bought mine all stock except glasspack mufflers, it was kind of a lazy dog! I changed out the glasspacks for flowmasters and it ran much better. Then adding on the 3.55's and it really woke up. Changing to 1-5/8" headers will help as well.
[ 2016-03-27, 09:08 AM: Message edited by: Marks93 ]
Posts: 825 | From: Earth | Registered: Jul 2011
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WildStangZ
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Member # 10077
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24lbs injectors , needs more fuel. While ur add it, do the headers.
Posts: 111 | From: hayward | Registered: Jun 2010
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i
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Member # 12534
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posted
What spark plugs are you running? Are they gapped to .52?
Posts: 1901 | From: Sacramento | Registered: Nov 2012
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FOXX5.0
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Member # 9094
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I'm running autolite coppers I don't remember the number but I asked for 94 cobra spark plugs at the auto part store I'll double check the gap on them
Posts: 1555 | From: (~__~) | Registered: Apr 2009
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Blind
2.3L
CAFords OG
Member # 3052
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posted
2.73/3.08 gears and e-cam is a great combo for a slug
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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Martinna
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Member # 12493
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posted
Check the EEC for error codes?
Posts: 1093 | From: City | Registered: Oct 2012
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