New car; slight carburetor issue

101fng · May 10th, 2011, 11:33 PM

ok, just bought an 87 LX. it runs great but at 5000 rpm it acts as if it has hit a rev limiter. any ideas? is it just improper jet sizing or what?

oh and pic

believe me, paint is the first priority, but i'd like a heads up on the carb issue just so i can work on that while its being painted

93hatch · May 10th, 2011, 11:35 PM

timing can do it too. Leave the paint!

FastStang91Lx · May 10th, 2011, 11:37 PM

Looking like that, I wouldn't worry about the revving issue until it's repainted. The car's prolly just mad someone did that to it, lol.

F8L GT · May 10th, 2011, 11:39 PM

either timing or running low on fuel. i use to have the same problem in my truck after i put the stroker in

101fng · May 11th, 2011, 12:01 AM

so its unanimous... its a timing issue. thanks. i'll check it tomorrow. what should the timing be set at? disclaimer: this is my first SBF.

101fng · May 11th, 2011, 12:02 AM

Originally Posted by FastStang91Lx

Looking like that, I wouldn't worry about the revving issue until it's repainted. The car's prolly just mad someone did that to it, lol.

thanks for the laugh lol. me and thrasher both had a pretty good laugh.

F8L GT · May 11th, 2011, 12:35 AM

i cant see the pic but what kind of distributor do you have on it?

101fng · May 11th, 2011, 12:37 AM

i'll have to check tomorrow

ryanw · May 11th, 2011, 01:08 AM

Do you still have your 86 hatch ?

93hatch · May 11th, 2011, 01:09 AM

could be timing, could be jetted wrong, not saying it IS timing

101fng · May 11th, 2011, 01:18 AM

Originally Posted by ryanw

Do you still have your 86 hatch ?

85, yes. we got an EXTREME deal on this 87 so we could NOT pass it up. a family member was selling it and wanted it to remain in the family so we obliged lol. the 87 is going to be my DD for a while. and since we're going to keep it for sure, we might as well paint it right and get it running strong.

the 85 will start accumulating new parts as soon as i begin my terminal leave, but i'm thinking we'll do a nice drivable 347 with a C4. the 4 eye hatch has really grown on me and i really want to see it back to its full glory (with a lil extra power lol). the 09 is kind of evolving into my race car and it's getting to the point that i don't want to drive it everyday.

ryanw · May 11th, 2011, 01:31 AM

Originally Posted by 101fng

85, yes. we got an EXTREME deal on this 87 so we could NOT pass it up. a family member was selling it and wanted it to remain in the family so we obliged lol. the 87 is going to be my DD for a while. and since we're going to keep it for sure, we might as well paint it right and get it running strong.

the 85 will start accumulating new parts as soon as i begin my terminal leave, but i'm thinking we'll do a nice drivable 347 with a C4. the 4 eye hatch has really grown on me and i really want to see it back to its full glory (with a lil extra power lol). the 09 is kind of evolving into my race car and it's getting to the point that i don't want to drive it everyday.

Ya dont give up on the 85 Four eye stang....she will be great when shes done, i dont see to many of them around any more

101fng · May 11th, 2011, 01:43 AM

the 85 will not be forgotten. i say this now and i really hope i'm right. but i think with the job opportunities i have in my future, there will be no shortage of restoration funds. i have a vision in my mind of what i want each car to be, and the vision i had of my 09 is coming to fruition so i have hopes that i can achieve similar results with both the 87 and 85. the 87 i think will be easy. i just want a nice simple DD to hand down to the little guy when he hits high school (one that can pull him some tail). i want the 85 to be a little more on the wild side but still "drivable" so that the GF can take it out every now and then.

either way, i think our little family has some fun times ahead modding/restoring/racing these vehicles. i want the 85 to be mine and nash's project. one that he can tell all his jealous kindergarden friends about.

plus, the four eye is a future classic and i'd be doing a disservice to all the mustang community by letting it rot.

R3dFyre02 · May 11th, 2011, 07:52 AM

yep, gotta love the 4 eyes... Sorry the Aero nose never really did it for me, always preferred the 4 eye. But man, gotta love that paint! Looks like what one of the kids in school did to his full sized Blazer after he lowered it and put it on 13" wire spoked rims...

69fastback · May 11th, 2011, 08:05 AM

Or it could have a rev limiter.

MustangMatt96GT · May 11th, 2011, 11:14 AM

Floats could need raised a bit... there are alot of possibilities, i would check the timing, depending on the distributor, I would set it 12-14 base, and then if that doesnt work, raise the floats a little... if that doesnt work, take the gest out and show us what jets they are.

HotRodGT · May 11th, 2011, 03:50 PM

is more than 5000 rpm regular for a stock motor or does yours have some work. my 84 feels like it done around 5k rpm. i though that was all a stock motor had?

101fng · May 11th, 2011, 11:05 PM

Originally Posted by HotRodGT

is more than 5000 rpm regular for a stock motor or does yours have some work. my 84 feels like it done around 5k rpm. i though that was all a stock motor had?

My tach redlines at 6000 so idk. I mean the power drops off at about 4000 but at 5 the tach just bounces

FastStang91Lx · May 11th, 2011, 11:13 PM

Originally Posted by 101fng

thanks for the laugh lol. me and thrasher both had a pretty good laugh.

She finds a car for you while you're away and that wasn't enough, you had to get another. Just Greedy! Hope you get it squared away, I know nothing about carbs except for cleaning and rejetting the one's on my bike, so I can't really contribute. But hope all is well with the 4 eye too.

LSX Freak · May 11th, 2011, 11:14 PM

Originally Posted by 101fng

My tach redlines at 6000 so idk. I mean the power drops off at about 4000 but at 5 the tach just bounces

Does it have an ignition box?

May 10th, 2011, 11:33 PM	#1
101fng Banned 2009 Mustang GT Join Date: Apr 2008 Location: Johnson City, TN Posts: 6,520 iTrader: 2 reviews	New car; slight carburetor issue ok, just bought an 87 LX. it runs great but at 5000 rpm it acts as if it has hit a rev limiter. any ideas? is it just improper jet sizing or what? oh and pic believe me, paint is the first priority, but i'd like a heads up on the carb issue just so i can work on that while its being painted __________________

May 10th, 2011, 11:35 PM	#2
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	timing can do it too. Leave the paint! __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

May 10th, 2011, 11:37 PM	#3
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	Looking like that, I wouldn't worry about the revving issue until it's repainted. The car's prolly just mad someone did that to it, lol. __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

May 10th, 2011, 11:39 PM	#4
F8L GT !FACEPLATED! 2002 Mustang GT 7.84 @ 86.01 Join Date: Jul 2008 Location: Upper Michigan Posts: 12,917 iTrader: 13 reviews	either timing or running low on fuel. i use to have the same problem in my truck after i put the stroker in __________________ MM Bracket Racing Crew Co-Founder ~Its a Drag Car, Not a Show Car~ LINK-->Custom Race Transmission Build<--LINK

May 11th, 2011, 12:01 AM	#5
101fng Banned 2009 Mustang GT Join Date: Apr 2008 Location: Johnson City, TN Posts: 6,520 iTrader: 2 reviews	so its unanimous... its a timing issue. thanks. i'll check it tomorrow. what should the timing be set at? disclaimer: this is my first SBF. __________________

May 11th, 2011, 12:35 AM	#7
F8L GT !FACEPLATED! 2002 Mustang GT 7.84 @ 86.01 Join Date: Jul 2008 Location: Upper Michigan Posts: 12,917 iTrader: 13 reviews	i cant see the pic but what kind of distributor do you have on it? __________________ MM Bracket Racing Crew Co-Founder ~Its a Drag Car, Not a Show Car~ LINK-->Custom Race Transmission Build<--LINK

May 11th, 2011, 12:37 AM	#8
101fng Banned 2009 Mustang GT Join Date: Apr 2008 Location: Johnson City, TN Posts: 6,520 iTrader: 2 reviews	i'll have to check tomorrow __________________

May 11th, 2011, 01:08 AM	#9
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	Do you still have your 86 hatch ? __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

May 11th, 2011, 01:09 AM	#10
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	could be timing, could be jetted wrong, not saying it IS timing __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

May 11th, 2011, 01:43 AM	#13
101fng Banned 2009 Mustang GT Join Date: Apr 2008 Location: Johnson City, TN Posts: 6,520 iTrader: 2 reviews	the 85 will not be forgotten. i say this now and i really hope i'm right. but i think with the job opportunities i have in my future, there will be no shortage of restoration funds. i have a vision in my mind of what i want each car to be, and the vision i had of my 09 is coming to fruition so i have hopes that i can achieve similar results with both the 87 and 85. the 87 i think will be easy. i just want a nice simple DD to hand down to the little guy when he hits high school (one that can pull him some tail). i want the 85 to be a little more on the wild side but still "drivable" so that the GF can take it out every now and then. either way, i think our little family has some fun times ahead modding/restoring/racing these vehicles. i want the 85 to be mine and nash's project. one that he can tell all his jealous kindergarden friends about. plus, the four eye is a future classic and i'd be doing a disservice to all the mustang community by letting it rot. __________________

May 11th, 2011, 07:52 AM	#14
R3dFyre02 Hardcore Enthusiast Join Date: Aug 2007 Posts: 1,173 iTrader: 2 reviews	yep, gotta love the 4 eyes... Sorry the Aero nose never really did it for me, always preferred the 4 eye. But man, gotta love that paint! Looks like what one of the kids in school did to his full sized Blazer after he lowered it and put it on 13" wire spoked rims... __________________ 02GT - Blown motor 86LX 3.8TBI auto replacement daily driver How to retrofit HID's

May 11th, 2011, 08:05 AM	#15
69fastback Premium Member 1969 Mustang Mach 1 6.824@101.61 Join Date: Aug 2006 Location: Oklahoma jackass, get to driving Posts: 5,565 iTrader: 0 reviews	Or it could have a rev limiter. __________________ ./___ _ ____ ___ \. ( ]]] _ _ O _ _ [[[ ) \_ o _ _____ _ o _/ \|___\| ......... \|___\| http://www.youtube.com/watch?v=HyYU3...e_gdata_player

May 11th, 2011, 11:14 AM	#16
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,689 iTrader: 3 reviews	Floats could need raised a bit... there are alot of possibilities, i would check the timing, depending on the distributor, I would set it 12-14 base, and then if that doesnt work, raise the floats a little... if that doesnt work, take the gest out and show us what jets they are. __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

May 11th, 2011, 03:50 PM	#17
HotRodGT Enthusiast 2002 GT, 1989 GT, 1984 GT Join Date: Dec 2009 Location: Bakersfield, CA Posts: 609 iTrader: 0 reviews	is more than 5000 rpm regular for a stock motor or does yours have some work. my 84 feels like it done around 5k rpm. i though that was all a stock motor had? __________________

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