E303 vs 2031

TEXSN95 · 05-12-2001, 12:32 PM

These cams have almost the same specs, except that the 2031 has a bit less intake duration. But why do so many people have bad idle problems with the E? I've heard many more complaints about the E, and none about the 2031 so far. Does the split duration of the 2031 help with the idle, and/or does the 2031 pull more vacuum than the E?

------------------
Clint L.
White 95 Cobra #3637
58cc GT40X heads with mild porting, Crane 2031 cam, FRPP 65 TB, 1.7s, Cobra intake, homeade cold air, 155lph, pullies, Tokico Illuminas, C springs, GW lower control arms, Steeda CC plates, aluminum driveshaft, Steeda quadrant, MSD6A, Mac shorties, off road hpipe, 2 1/2 ultra flows w/ dumps, R hood, Euro clear corners, stock 3.08s
13.61 @ 104.7 w/ 2.22

HAITHAM · 05-13-2001, 08:53 AM

because E lob separation is 110* & it cause the bad idle, but 2031 lob separation is 112*.

------------------
94 COBRA # 926/5009
TFS track heat heads (ported), Cobra intake (ported), 24# Injectors, 3/8" Phenolic spacer, E303 Cam, TFS 1.7 rr
BBK 1 5/8" headers, BBK 65mm TB, Pro-M 80mm MAS, PIH kit w/ A9L computer, FMS 3.55 ratio
BBK 190 lph fuel pump, Paxton fpr, MSD'S, March Pulley's, Pro-5 tower power shifter, Autometer shift light (5600),
Intellitronix Air/Fuel gauge, Eibach Sportline Springs, Tokico 5-way adjustable, Granatelli Motorsport Subframe

jimberg · 05-13-2001, 09:11 AM

E303s do not have a bad idle. Mine idles perfectly at 650-700rpm. There are a million things that can cause a bad idle, but for some reason people insist on blaming it on the cam.

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351W 89 Mustang GT Convertible

FiveORacer · 05-14-2001, 08:21 PM

I agree. Most people change 50 things at once and then think the cam sucks.

Besides, you think the E is wild, I got meeself an "F". Yeehaw baby!

FiveORacer

TEXSN95 · 05-14-2001, 09:38 PM

So does more lobe sep equal more vacuum, therefore a better idle? It seems that about 2/3 of the people with an E dont like it (from the posts I've read), and I'm sure most aren't just morons who don't know a thing about tuning a car after a cam swap. I know the E or 2031 isn't that wild, but I didn't consider any of the alphabet cams in the first place when I did mine.

------------------
Clint L.
White 95 Cobra #3637
58cc GT40X heads with mild porting, Crane 2031 cam, FRPP 65 TB, 1.7s, Cobra intake, homeade cold air, 155lph, pullies, Tokico Illuminas, C springs, GW LCAs, Kenny Brown super subs, Steeda CC plates, aluminum driveshaft, Steeda quadrant, B&M ripper, Kirban FPR, MSD6A, Taylor wires, Mac shorties, off road hpipe, 2 1/2 ultra flows w/ dumps, R hood, Euro clear corners, stock 3.08s
13.61 @ 104.7 w/ 2.22

TheSloAod · 05-14-2001, 09:55 PM

try a .612 solid roller cam like the one i'm about to be using in the new shortblock with afr heads. good idle, very streetable

------------------
My slo aod- 3.73s, pullies, flowmasters, h-pipe, bbk cold air, and 13.42 in the 1/4 @ 103 mph

jeb · 05-15-2001, 12:02 PM

2031 here, and I love it. It idles just rough enough to sound mean, but smooth enough to run an auto trans(needs a stall though). My only gripe is that I needed longer pushrods.

------------------
90LX Ragtop.
14.7@95.3
Strut tower brace, K&N, 2.25'' Flowmasters, Hollow cats, Crank pulley, Crane 2031, Crane rockers, Holley FPR, 155lph, Heavy duty clutch, and alum quadrant.
Need Gears Bad!!!

t_oshea · 05-15-2001, 02:16 PM

I've got an E303 w/ TFS Twisted Wedge heads and TFS 1.7rr, and my car idles fine. It also runs great and has lots of torque across the board. Guy that built my engine says it is the best cam combo he's ever driven in a street mustang.

Nutty 5.0 · 05-19-2001, 05:28 PM

Ditto. I have had real good luck with the E cam and 1.7's. Even before the S trim. I've heard good and bad about both. Flip a coin! Either way you'll be happy. I personally stayed away from the 2031 do to 2 friends having a hard time with them. That and the E cam was e legal.

------------------
See my car HERE
93 GT Red/Grey
S trim, Edelbrock 6037 heads, E cam, BBK longtubes w/cats, 3 chamber Flowmasters, Cobra intake, Kirban fuel regulator, BBK 70mm t.b., 75mm Pro-M meter, 1.7 roller rockers, Mac upper and lower strut tower braces, FMS lowering springs, Factory Five upper and lower control arms, Speedware Cobra R 17X9 wheels, 3.73 gears & more.
DYNO=435.6 hp/405.1 tq at rear wheels.

Patrick Boetticher · 05-19-2001, 06:00 PM

i got a E cam TFS heads and a blocked that has been decked down... dunno how far down it has been deced.. bu8t can i run 1.70 rockers or even 1.72 rockers... they care comming with the heads and my stck (one of them) rockers are bent... what size rods should i need?????

HELP!!!!!!!!!!!

withamc · 05-20-2001, 01:35 AM

I'm running the 2031 in my 86, soon to be transplanted to the 93. It's got a lopey idle, but good driveability and pulls strong to 6000. The guy that dyno'd it remarked on the nice flat torque curve - 268 ft/lbs at 1500 RPM, peaked at 313 at 3500, and 270 at 5500.

05-12-2001, 12:32 PM	#1
TEXSN95 Registered Member Join Date: Mar 2001 Location: college station, tx Posts: 143	E303 vs 2031 These cams have almost the same specs, except that the 2031 has a bit less intake duration. But why do so many people have bad idle problems with the E? I've heard many more complaints about the E, and none about the 2031 so far. Does the split duration of the 2031 help with the idle, and/or does the 2031 pull more vacuum than the E? ------------------ Clint L. White 95 Cobra #3637 58cc GT40X heads with mild porting, Crane 2031 cam, FRPP 65 TB, 1.7s, Cobra intake, homeade cold air, 155lph, pullies, Tokico Illuminas, C springs, GW lower control arms, Steeda CC plates, aluminum driveshaft, Steeda quadrant, MSD6A, Mac shorties, off road hpipe, 2 1/2 ultra flows w/ dumps, R hood, Euro clear corners, stock 3.08s 13.61 @ 104.7 w/ 2.22

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05-13-2001, 08:53 AM	#2
HAITHAM Registered Member Join Date: Jun 2000 Location: Saudi Arabia Posts: 130	because E lob separation is 110* & it cause the bad idle, but 2031 lob separation is 112*. ------------------ 94 COBRA # 926/5009 TFS track heat heads (ported), Cobra intake (ported), 24# Injectors, 3/8" Phenolic spacer, E303 Cam, TFS 1.7 rr BBK 1 5/8" headers, BBK 65mm TB, Pro-M 80mm MAS, PIH kit w/ A9L computer, FMS 3.55 ratio BBK 190 lph fuel pump, Paxton fpr, MSD'S, March Pulley's, Pro-5 tower power shifter, Autometer shift light (5600), Intellitronix Air/Fuel gauge, Eibach Sportline Springs, Tokico 5-way adjustable, Granatelli Motorsport Subframe

05-13-2001, 09:11 AM	#3
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	E303s do not have a bad idle. Mine idles perfectly at 650-700rpm. There are a million things that can cause a bad idle, but for some reason people insist on blaming it on the cam. ------------------ 351W 89 Mustang GT Convertible

05-14-2001, 08:21 PM	#4
FiveORacer Registered Member Join Date: Jun 2000 Posts: 13	I agree. Most people change 50 things at once and then think the cam sucks. Besides, you think the E is wild, I got meeself an "F". Yeehaw baby! FiveORacer

05-14-2001, 09:38 PM	#5
TEXSN95 Registered Member Join Date: Mar 2001 Location: college station, tx Posts: 143	So does more lobe sep equal more vacuum, therefore a better idle? It seems that about 2/3 of the people with an E dont like it (from the posts I've read), and I'm sure most aren't just morons who don't know a thing about tuning a car after a cam swap. I know the E or 2031 isn't that wild, but I didn't consider any of the alphabet cams in the first place when I did mine. ------------------ Clint L. White 95 Cobra #3637 58cc GT40X heads with mild porting, Crane 2031 cam, FRPP 65 TB, 1.7s, Cobra intake, homeade cold air, 155lph, pullies, Tokico Illuminas, C springs, GW LCAs, Kenny Brown super subs, Steeda CC plates, aluminum driveshaft, Steeda quadrant, B&M ripper, Kirban FPR, MSD6A, Taylor wires, Mac shorties, off road hpipe, 2 1/2 ultra flows w/ dumps, R hood, Euro clear corners, stock 3.08s 13.61 @ 104.7 w/ 2.22

05-14-2001, 09:55 PM	#6
TheSloAod Registered Member Join Date: Apr 2001 Location: baytown, tx usa Posts: 121	try a .612 solid roller cam like the one i'm about to be using in the new shortblock with afr heads. good idle, very streetable ------------------ My slo aod- 3.73s, pullies, flowmasters, h-pipe, bbk cold air, and 13.42 in the 1/4 @ 103 mph

05-15-2001, 12:02 PM	#7
jeb Registered Member Join Date: Sep 1999 Location: Deltona Fl Posts: 140	2031 here, and I love it. It idles just rough enough to sound mean, but smooth enough to run an auto trans(needs a stall though). My only gripe is that I needed longer pushrods. ------------------ 90LX Ragtop. 14.7@95.3 Strut tower brace, K&N, 2.25'' Flowmasters, Hollow cats, Crank pulley, Crane 2031, Crane rockers, Holley FPR, 155lph, Heavy duty clutch, and alum quadrant. Need Gears Bad!!!

05-15-2001, 02:16 PM	#8
t_oshea Registered Member Join Date: May 2001 Location: Wilmington, DE Posts: 13	I've got an E303 w/ TFS Twisted Wedge heads and TFS 1.7rr, and my car idles fine. It also runs great and has lots of torque across the board. Guy that built my engine says it is the best cam combo he's ever driven in a street mustang.

05-19-2001, 05:28 PM	#9
Nutty 5.0 Registered Member Join Date: Apr 2000 Location: Collegeville, Pa, USA Posts: 75	Ditto. I have had real good luck with the E cam and 1.7's. Even before the S trim. I've heard good and bad about both. Flip a coin! Either way you'll be happy. I personally stayed away from the 2031 do to 2 friends having a hard time with them. That and the E cam was e legal. ------------------ See my car HERE 93 GT Red/Grey S trim, Edelbrock 6037 heads, E cam, BBK longtubes w/cats, 3 chamber Flowmasters, Cobra intake, Kirban fuel regulator, BBK 70mm t.b., 75mm Pro-M meter, 1.7 roller rockers, Mac upper and lower strut tower braces, FMS lowering springs, Factory Five upper and lower control arms, Speedware Cobra R 17X9 wheels, 3.73 gears & more. DYNO=435.6 hp/405.1 tq at rear wheels.

05-19-2001, 06:00 PM	#10
Patrick Boetticher Registered Member Join Date: Feb 1999 Location: Camarillo/Thousand Oaks Ca Posts: 223	i got a E cam TFS heads and a blocked that has been decked down... dunno how far down it has been deced.. bu8t can i run 1.70 rockers or even 1.72 rockers... they care comming with the heads and my stck (one of them) rockers are bent... what size rods should i need????? HELP!!!!!!!!!!!

05-20-2001, 01:35 AM	#11
withamc Registered Member Join Date: Aug 2000 Location: Thousand Oaks, CA Posts: 396	I'm running the 2031 in my 86, soon to be transplanted to the 93. It's got a lopey idle, but good driveability and pulls strong to 6000. The guy that dyno'd it remarked on the nice flat torque curve - 268 ft/lbs at 1500 RPM, peaked at 313 at 3500, and 270 at 5500.