12's in a 96 cobra?

93GTDIN · 04-07-2003, 01:08 AM

I am looking for high 12's on a 4.6 32 valve cobra coupe... but here's the catch... no power adders!

my starting point would look something like this:
low mileage engine
longtubes, O/R x pipe, 3.73's

ok, i know it can be done, the question is, how.... any recommendations?

Mustang92 · 04-07-2003, 10:56 AM

12's with a 4v isn't all that hard to achieve. Longtubes and X pipe are both good places to start but gearing needs to be at least 4.30's or 4.56's. This isn't like a 5.0 that runs out of steam at 5000 RPM's the 4v 4.6 is just starting to breath at that RPM and needs to be wound out to 7K RPM to take advantage of the power band. I'd say get the basics like pulleys, timing adjuster, K&N plus the exhaust you mentioned, gears and a good set of tires and your there with some practice at the track. Slicks would be the best but it can be done on DRs.

Bill

93GTDIN · 04-07-2003, 02:17 PM

could it be done with 4.10's? This is going to be my daily driver. what kind of suspension parts and good street radials could I use to acheive this... I"m trying not to sacrifice driveability too much.

Dark_5.0 · 04-07-2003, 02:55 PM

Most people I know are running 12's with gears and exhaust.

4.30's at least. In overdrive the rpms arent bad at all.

Later,

JohnnyRebel · 04-12-2003, 09:37 AM

I've done it with my 96 - ASP pullies with built in damper, BBK off road 'h' (stock ex. manifolds, stock mufflers and tailpipes), 4.30's and slicks.

At first I went with 4.10's and did not heed the advice of the fellows on the Corral board. Well, they were right the 4.10's were not enough for the DOHC especially on the street. I had the 4.10's taken out and they had only 5,000 miles on them (still have 'em). The 4.30's were installed are just about the perfect gear for these cars. You have that tall fifth gear for cruising and first gear is not a waste from a dead stop. At the strip the 4.10's are pretty easy to bog coming off the line whereas the 4.30's allow the car to 'pull' itself out of a launch much, much better. Don't fear the gear.

With over 600 dragstrip passes (9,900 miles) on my cobra and some heavy duty launching lately I had a Detroit Locker differential and Moser axles installed. Good thing too. With all that racing half of the splines on the axles were worn off and the remaining splines had a slight twist in them.

Good luck. My advice would be to locate a DOHC near you with 4.30's and ride in it and, if possible, drive it. That's what I did from the beginning only the car was equipped with 3.73's. I couldn't tell it had even had a gear change and knew that gear would be useless.

Jeff

93GTDIN · 04-13-2003, 02:28 AM

well this is my daily driver so I think 4.10s are the biggest i'll go. What do you cruise at 70 with the 4.30's? With the 373's I cruise 2600 or so... sound right? Also, you have pulleys...

what does the stock pulley look like? Does it have 2 sets of ribs like a blower pulley?

JohnnyRebel · 04-13-2003, 10:41 AM

2600 is high for 3.73's. That's about what cruising is @ 70 for me with 4.30's. Its been so long since I looked but I'm sure it is between 2600-2800 rpm. Be advised 4.10's are not a very good dragstrip gear. You shift into fourth right before the finish line so the car is no where near the optimum rpm zone that it needs to be to 'pull' through the traps.

The pulley is a serpentine type with the ribs By the way, the car has the UPR powerpipe and K & N filter for a little extra breathing.

Good luck,
Jeff

P.S. - If you're really convinced that you must have 4.10's I have a FMS set that came out of my cobra with only 6,000 miles on them. They made no noise whatsoever - $100 plus shipping.

97cobracpe · 04-13-2003, 10:15 PM

I got 4.30 gears as well, and I've never looked back. I drive the car daily including chicago winters. It's not bad at all. Cruising the highway at 70mph net me 2600-2800 as well.

The car sees about 12k - 15k miles a year. Get the 4.30s or you'll be kicking yourself in the ***. The only thing at sucks is the highway mileage, but for me, it was worth it.

93GTDIN · 04-13-2003, 11:25 PM

will a speedo gear work for a T5/AOD/T-45?

98SNAKE · 04-19-2003, 09:58 PM

See sig for my mods and best time, and its not bad on the e-way with the 4.30's. I went to Chicago with my car and it was a 6 hour drive. I highly recommend the 4.30's.

04-07-2003, 01:08 AM	#1
93GTDIN Registered Member Join Date: Jan 2001 Location: Live music capital of the world, TX Posts: 324	12's in a 96 cobra? I am looking for high 12's on a 4.6 32 valve cobra coupe... but here's the catch... no power adders! my starting point would look something like this: low mileage engine longtubes, O/R x pipe, 3.73's ok, i know it can be done, the question is, how.... any recommendations? __________________ 96 Cobra - a bit too stock. 14.0 @ 101

04-07-2003, 10:56 AM	#2
Mustang92 Drag Racer! Join Date: Nov 1999 Location: Lake Worth, FL USA Posts: 757	12's with a 4v isn't all that hard to achieve. Longtubes and X pipe are both good places to start but gearing needs to be at least 4.30's or 4.56's. This isn't like a 5.0 that runs out of steam at 5000 RPM's the 4v 4.6 is just starting to breath at that RPM and needs to be wound out to 7K RPM to take advantage of the power band. I'd say get the basics like pulleys, timing adjuster, K&N plus the exhaust you mentioned, gears and a good set of tires and your there with some practice at the track. Slicks would be the best but it can be done on DRs. Bill __________________ 2000 GT VRS O/R X, Dynomax Bullets, Steeda Pulleys, Pro-M 80MM, 4.30s, UPR Pro Series Suspension, UPR Tubular K-member, MAC Longtubes, Bullitt Intake, TKO, VT Engine Stage 1 NA Cams, SCT Tune. 285 RWHP/296 RWTQ 11.97 @ 113.20 M/M 100, 7085 www.uprproducts.com www.ponyexpressperformance.com www.modulardepot.com

04-07-2003, 02:17 PM	#3
93GTDIN Registered Member Join Date: Jan 2001 Location: Live music capital of the world, TX Posts: 324	could it be done with 4.10's? This is going to be my daily driver. what kind of suspension parts and good street radials could I use to acheive this... I"m trying not to sacrifice driveability too much. __________________ 96 Cobra - a bit too stock. 14.0 @ 101

04-07-2003, 02:55 PM	#4
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Most people I know are running 12's with gears and exhaust. 4.30's at least. In overdrive the rpms arent bad at all. Later, __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

04-12-2003, 09:37 AM	#5
JohnnyRebel Registered Member Join Date: Mar 2003 Posts: 3	I've done it with my 96 - ASP pullies with built in damper, BBK off road 'h' (stock ex. manifolds, stock mufflers and tailpipes), 4.30's and slicks. At first I went with 4.10's and did not heed the advice of the fellows on the Corral board. Well, they were right the 4.10's were not enough for the DOHC especially on the street. I had the 4.10's taken out and they had only 5,000 miles on them (still have 'em). The 4.30's were installed are just about the perfect gear for these cars. You have that tall fifth gear for cruising and first gear is not a waste from a dead stop. At the strip the 4.10's are pretty easy to bog coming off the line whereas the 4.30's allow the car to 'pull' itself out of a launch much, much better. Don't fear the gear. With over 600 dragstrip passes (9,900 miles) on my cobra and some heavy duty launching lately I had a Detroit Locker differential and Moser axles installed. Good thing too. With all that racing half of the splines on the axles were worn off and the remaining splines had a slight twist in them. Good luck. My advice would be to locate a DOHC near you with 4.30's and ride in it and, if possible, drive it. That's what I did from the beginning only the car was equipped with 3.73's. I couldn't tell it had even had a gear change and knew that gear would be useless. Jeff __________________ 96 Cobra 4.30's, Detroit Locker, Mosers, BBK 'h', ASP pullies, UPI Powerpipe CAI 12.91 @ 107

04-13-2003, 02:28 AM	#6
93GTDIN Registered Member Join Date: Jan 2001 Location: Live music capital of the world, TX Posts: 324	well this is my daily driver so I think 4.10s are the biggest i'll go. What do you cruise at 70 with the 4.30's? With the 373's I cruise 2600 or so... sound right? Also, you have pulleys... what does the stock pulley look like? Does it have 2 sets of ribs like a blower pulley? __________________ 96 Cobra - a bit too stock. 14.0 @ 101

04-13-2003, 10:41 AM	#7
JohnnyRebel Registered Member Join Date: Mar 2003 Posts: 3	2600 is high for 3.73's. That's about what cruising is @ 70 for me with 4.30's. Its been so long since I looked but I'm sure it is between 2600-2800 rpm. Be advised 4.10's are not a very good dragstrip gear. You shift into fourth right before the finish line so the car is no where near the optimum rpm zone that it needs to be to 'pull' through the traps. The pulley is a serpentine type with the ribs By the way, the car has the UPR powerpipe and K & N filter for a little extra breathing. Good luck, Jeff P.S. - If you're really convinced that you must have 4.10's I have a FMS set that came out of my cobra with only 6,000 miles on them. They made no noise whatsoever - $100 plus shipping. __________________ 96 Cobra 4.30's, Detroit Locker, Mosers, BBK 'h', ASP pullies, UPI Powerpipe CAI 12.91 @ 107

04-13-2003, 10:15 PM	#8
97cobracpe Registered Member Join Date: Feb 2001 Location: Westchester, IL Posts: 37	I got 4.30 gears as well, and I've never looked back. I drive the car daily including chicago winters. It's not bad at all. Cruising the highway at 70mph net me 2600-2800 as well. The car sees about 12k - 15k miles a year. Get the 4.30s or you'll be kicking yourself in the ***. The only thing at sucks is the highway mileage, but for me, it was worth it. __________________ John Dimitropoulos 97 Cobra Coupe Black/Tan 4.30 Gears, Mafterburner, VRS Off-road x-pipe, Tremec TKO, Spec Stage 3 clutch. JD's Domain

04-13-2003, 11:25 PM	#9
93GTDIN Registered Member Join Date: Jan 2001 Location: Live music capital of the world, TX Posts: 324	will a speedo gear work for a T5/AOD/T-45? __________________ 96 Cobra - a bit too stock. 14.0 @ 101

04-19-2003, 09:58 PM	#10
98SNAKE Registered Member Join Date: Apr 2001 Location: Sterling Heights,Michigan Posts: 129	See sig for my mods and best time, and its not bad on the e-way with the 4.30's. I went to Chicago with my car and it was a 6 hour drive. I highly recommend the 4.30's. __________________ SOLD!!! 98Cobra Black on Black Coupe 4.30's DTS diff cover Eaton posi Moser 31 spline axles Spec Stage 2 clutch B&M Ripper shifter BBK off-road x-pipe Steeda pullies Steeda timing adj@14deg MAC cold air Best Time 12.9 @107.5 on street tires New Car 03 Cobra Not Stock

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