speed - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > speed

FS: 2007-2013 Jeep Wrangler "HALO" Angel Eye KitFlowmaster's Force II Axle-back exhaust system for the 201FS: Wranger BRIGHT License Plate LED! Just $3! Great value

Reply
Unread 01-23-2002, 10:30 PM   #1
ryan14
Registered User
 
Join Date: Jan 2002
Location: birmingham, alabama
Posts: 18
speed

hey
Ive got a 1991 wrangler sahara edition and imfixn it up. im about to be turning 16 and i know a jeep isnt any kind of dragracin car but, but i need it to go a littl faster than 70 mph. can anyone help me. how can i make it a littl bit faster.
thanks, ryan

ryan14 is offline   Reply With Quote
Unread 01-23-2002, 10:37 PM   #2
evilpsych
Registered User
 
Join Date: Oct 2001
Location: Mt. Sterling, KY
Posts: 1,045
lemme guess.. 2.5l 4 cylinder?
hrmm... how about shifting at 3-4thousand rpms instead of 2.. uhh.. if you got the 4.0l i dont see why you cant go faster than 70 unless you got huge tires..
__________________
Awwwwwwwwwwww... So he wants to go OFF-ROAD does he????

'93 YJ, 4.0, K&N filter, Borla Header, Borla Cat-Back, Hi-Flo Cat, 3 Core Radiator, D-Rings, TruckNuts, MSD 6A, LockRite Locker in D30, Magnecors, Kickass Stereo, 1" daystar, 31" BFG AT's, Homemade Rocker Guards and Front/Rear air-tank bumpers with tire carrier, 15x8 AR-767 4"BS, BDS 3.5 HD lift, AMA A/C Kit, York OBA, GoFerIt 1" MML, 8,000lb HF/MM Winch, Magellan MAP 330 GPS, PRO-2067 500ch. Scanner, oh, and a CB capable of talking to SATURN!

"The Only Thing Necessary for Evil to Succeed is for Good Men to Do Nothing." - Edmund Burke
evilpsych is offline   Reply With Quote
Unread 01-24-2002, 06:08 AM   #3
Atropine
Registered User
2000 TJ Wrangler 
 
Join Date: Sep 2001
Location: Charleston, SC
Posts: 552
I wouldnt put any kind of lift on it if your going that fast. Can you say ....rollover...
Jeep is a relax type vehicle, just cruise in the slow lane... you'll be suprised
__________________
93' YJ
00' TJ
02' KJ
04' Dodge Ram

"Jeep mechanic wanted: must be able to put square peg in round hole"
Atropine is offline   Reply With Quote
Unread 01-24-2002, 09:25 AM   #4
PuebloIV
Registered User
 
Join Date: Mar 2001
Location: Texas
Posts: 17
The question is WHY would you want to go above 70?
__________________
[url="http://mikes.rockcrawler.com/index.html"]http://mikes.rockcrawler.com/index.html[/url]
PuebloIV is offline   Reply With Quote
Unread 01-24-2002, 09:35 AM   #5
SBall
Registered User
 
Join Date: Jan 2002
Posts: 41
Ryan14, although it would be awesome to be able to outrun you friends, why dont you outcool them. Jeeps are the coolest vehicles around. Everybody loves them, whether they are slow or fast, big or small. So go slow, enjoy life, and pick up all the hot chics that they leave behind. Plus it is safer.
__________________
92 YJ 4.0L, 35" Goodyear MTR's, Rough Country Suspension
SBall is offline   Reply With Quote
Unread 01-24-2002, 11:28 AM   #6
Nightclaw
Registered User
1994 YJ Wrangler 
 
Join Date: Jul 2001
Location: Oceanside, CA, USA
Posts: 150
Come on, folks. An I-6 YJ should be able to hold a straight and level 70-75 on the highway without breaking a sweat. Heck, my YJ will hold 85 no problem (if I'm feeling particularly suicidal... ), even with 4.56's, 33" tires and 6" of lift. Seriously, there's something going on if you can't hold 70 on a level road, even with a lift and oversize tires.

Some things to consider:
  • Ignition - worn plugs, aged wires, coil, dirty valves, carbon buildup in the combustion chamber
  • Intake - dirty air filter, !Restrictor mod not done, dirty throttle body
  • Fuel - dirty fuel filter, clogged injectors
  • Exhaust - cracked manifold (common), plugged-up catalytic converter, bent/restricted piping, plugged-up muffler
  • Electrical - Faulty TPS
  • Mechanical - worn cylinders/compression rings, worn camshaft lobes, worn camshaft sprockets/chain, bent pushrod(s), tired lifters, worn rocker arms, cracked valve(s), tired valve springs

Guess how many of the above I had to address when I first got my YJ... Answer: all of them (except the ones listed for "Mechanical"). There's definitely some power hiding in your engine, you just need to find what's locking it up and unlock it.
__________________
=========
[b]'94 YJ Sahara Hardtop[/b]
4.0L / AX-15 / Stock NP231 / Stock D30 (open) / D60 (35-spline, Detroit locker, Moser axles) / rear disc brakes / 4.56 gears / Advanced Adapters SYE & CV Shaft / 33" BFG MT-KM's / Thorley Header / Magnaflow Muffler / BesTop Flares
Nightclaw is offline   Reply With Quote
Unread 01-24-2002, 11:37 AM   #7
AJ
Registered User
 
Join Date: Oct 2001
Location: Sitting at my desk
Posts: 83
nightclaw, what's your mileage on the highway? I'm setting up the same combo, w/a 4"lift.
AJ is offline   Reply With Quote
Unread 01-24-2002, 11:44 AM   #8
Nightclaw
Registered User
1994 YJ Wrangler 
 
Join Date: Jul 2001
Location: Oceanside, CA, USA
Posts: 150
Quote:
Originally posted by AJ:
nightclaw, what's your mileage on the highway? I'm setting up the same combo, w/a 4"lift.
Good question. I need to figure this out one of these days... Off the cuff, I'm getting around 14 MPG on the highway, going between 70-75MPH. I base this on the 8 gallons I took on after driving 120 miles on my way to Superstition IV last weekend, with lots of up- and down-hill grades and head/cross-winds between my house and the Golden Acorn casino where I got gas. Not exactly scientific...

-Brian
__________________
=========
[b]'94 YJ Sahara Hardtop[/b]
4.0L / AX-15 / Stock NP231 / Stock D30 (open) / D60 (35-spline, Detroit locker, Moser axles) / rear disc brakes / 4.56 gears / Advanced Adapters SYE & CV Shaft / 33" BFG MT-KM's / Thorley Header / Magnaflow Muffler / BesTop Flares
Nightclaw is offline   Reply With Quote
Unread 01-24-2002, 11:53 AM   #9
glm 87 wrangler
Registered User
 
Join Date: Sep 2001
Location: Fayetteville NC
Posts: 271
A better carb and a TFI igniton should start u off.But my Jeep has no lift but has 31/10 and I went 80 mph but want be doing that again.I myself am some what a speed demon and my driving record would back it up.I would not drive a jeep 80 mph unless I was running from 2 big guys wanting to make me there *****.But if you are inclined to run that fast these will get u there.But there are other mod problems to go through like bypassing the cpu that controls the carb and timming.They have a problem with missing with your mods.I will send you the web site for that.later,Gary
__________________
Gary 87 Wrangler 4.2 258 with weber carb and TFI upgrade.
31/10.5 and Nutter bypass!
glm 87 wrangler is offline   Reply With Quote
Unread 01-24-2002, 12:34 PM   #10
Nightclaw
Registered User
1994 YJ Wrangler 
 
Join Date: Jul 2001
Location: Oceanside, CA, USA
Posts: 150
Uh, I thought '89 was the last year for the carb'd I-6...? '90+ should be EFI.
__________________
=========
[b]'94 YJ Sahara Hardtop[/b]
4.0L / AX-15 / Stock NP231 / Stock D30 (open) / D60 (35-spline, Detroit locker, Moser axles) / rear disc brakes / 4.56 gears / Advanced Adapters SYE & CV Shaft / 33" BFG MT-KM's / Thorley Header / Magnaflow Muffler / BesTop Flares
Nightclaw is offline   Reply With Quote
Unread 01-25-2002, 09:26 AM   #11
glm 87 wrangler
Registered User
 
Join Date: Sep 2001
Location: Fayetteville NC
Posts: 271
Nightclaw someone emailed me that had a 92 with a 4.2 carter carb engine.Beats the heck out of me.
__________________
Gary 87 Wrangler 4.2 258 with weber carb and TFI upgrade.
31/10.5 and Nutter bypass!
glm 87 wrangler is offline   Reply With Quote
Unread 01-26-2002, 11:02 AM   #12
Nine5YJ
Registered User
 
Join Date: Mar 2001
Posts: 138
You should definately be able to hold AT LEAST 75 on level ground highway.. i can get my 2.5L 4Cyl up to about 98-100MPH downhill, and even uphill on a highway picking up some wind it will hold about 80MPH with it floored. It might be needing a major tune up.. plugs, filters, exhaust, etc. Try shifting at around 3500-4000RPMs when merging on if you dont already, i used to shift around 2500 cause my engine would be pretty loud, but thats just cause it's a 4 cyl. But dont go too fast.. they're not meant for speed. If you hit a bump to fast you can loose it. Good luck!
__________________
95 YJ, 31 x 12.5 ProComp ATs / AR767 wheels, stock 4.10s, 2 1/2" Rough Country Suspension Lift, and huge rusty basketball sized drain holes.
Nine5YJ is offline   Reply With Quote
Unread 01-26-2002, 11:05 AM   #13
Brendan
Registered User
 
Join Date: Sep 2001
Location: FL
Posts: 162
the 91 was the first year with the EFI kit on the I6. The 4 banger YJs were always TBI. Unless he has faulty registration, or a swap, he has EFI.

Ryan14: Jp magazine has a great article this month about performance upgrades for EFI 6 cylinder jeep motors. But I have the 4.2 carb version, so I have probably 40 hp or less than you, and I could hit 75 on the highway before i upgraded anything.
__________________
Duvie

95 YJ 2.5L 5 Speed

Fightin a war against Florida Rust!
Brendan is offline   Reply With Quote
Unread 01-26-2002, 12:32 PM   #14
RCHavok797
Registered User
2005 LJ Wrangler 
 
Join Date: Jan 2002
Location: Oxford, CT
Posts: 2,434
I have a 91 Wrangler Sahara with a 2 inch lift and 31 inch tires and I go over 70 all the time with no problem.
__________________
2005 LJ Impact Orange 4.0L Automatic (Tigger) - new ride
1991 YJ Sahara 4.0L Automatic
1978 Dodge Lil Red Express - work in progress
RCHavok797 is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.