Carburetor decisions - Pirate4x4.Com : 4x4 and Off-Road Forum

Chris90210 · 12-30-2007, 11:45 AM

So I need an intake/carb for a 4.2 engine I am building what would be my best/cheapest combo for light rock crawling. With exception of the crappy carters

rocknbronco · 12-30-2007, 12:10 PM

A Holley Off Road Carb or Low Rider Carb.

atblis · 12-30-2007, 05:54 PM

No contest. MC2100

Use the stock intake, get the adapter (~$20), and run a MC2100

Webers suck ass.
The Holley Truck Avenger is okay, but not better than the MC2100 (and is $$$).
________
Sophiexx

Chris90210 · 12-31-2007, 06:35 AM

Quote:

Originally Posted by atblis

No contest. MC2100

Use the stock intake, get the adapter (~$20), and run a MC2100

Webers suck ass.
The Holley Truck Avenger is okay, but not better than the MC2100 (and is $$$).

I found one on ebay for $140 and will also sell me the intake for another $20. good deal?

atblis · 12-31-2007, 08:08 AM

I would say no, but it kinda depends.

Around me, I just go to the JY and snag one for $20, get a rebuild kit for another $15. You'll probably have to order a power valve, that's $10. Jets also, IIRC you'll end up paying about $20 shipped for a pair.
20 +
15 +
10 +
20 +
_____
$65

The MC2100 is extremely easy to rebuild. I just use carburetor cleaner and a toothbrush.

Now, if that carb off ebay comes with the correct jets, and the correct powervalve and is a fresh rebuild, than that doesn't sound too bad.

If by the intake you mean the adpater, you can order that anywhere for about $20
Mr Gasket 1937
Transdapt TRD-2086

I am about to do a TBI swap. If that goes well, I'll have some MC2100s for sale. The TBI swap is something you might want to look into.
________
Live sex

Chris90210 · 12-31-2007, 09:57 AM

Quote:

Originally Posted by atblis

I would say no, but it kinda depends.

Around me, I just go to the JY and snag one for $20, get a rebuild kit for another $15. You'll probably have to order a power valve, that's $10. Jets also, IIRC you'll end up paying about $20 shipped for a pair.
20 +
15 +
10 +
20 +
_____
$65

The MC2100 is extremely easy to rebuild. I just use carburetor cleaner and a toothbrush.

Now, if that carb off ebay comes with the correct jets, and the correct powervalve and is a fresh rebuild, than that doesn't sound too bad.

If by the intake you mean the adpater, you can order that anywhere for about $20
Mr Gasket 1937
Transdapt TRD-2086

I am about to do a TBI swap. If that goes well, I'll have some MC2100s for sale. The TBI swap is something you might want to look into.

adapter is included with the carb I offered him 20 for the intake too(I need it all) 6 months since rebuild, throttle adapter, and this is coming off of a 258

atblis · 12-31-2007, 10:29 AM

Ask him what size carb it is, what jets, and what powervalve. Don't tell him what you're looking for, just ask what it has. If he doesn't know the answers immediately off the top of his head, than most likely it doesn't have those things.

Jets should be 46s or 47s 46s are about perfect for a stock 258 at sea level
Powervalve should be somewhere between 8.5-10.5
Carb should be a 1.08

I was consistantly getting 21mpg with a stock 258, 3 speed and 33x12.50s running a 1.08 with 46s and a 9.5 PV (55 mph though).

If it is has an electric or manual choke that's a little bit of a bonus.

So if everything is in good working order, it has the correct jets/pv and is a 1.08, that isn't a horrible deal. You're paying a little for convenience, but...
________
Live Sexy Cams

DaJeeper · 12-31-2007, 06:16 PM

What is the doner vehicle the MC2100 comes off of in the junk yard?

I just bought a Scrambler, 83, with the carter carb on it and I want to upgrade.

Also, what makes the TBI better than carb? Since it's not pumping gas right into the intake ports like a MPI? Is a TBI worth the upgrade? What are the benefits? Jeeping up or down Inclines?

Thanks,

atblis · 12-31-2007, 08:17 PM

Yahoo or Google
search for "MC2100 258 swap" or something similar

http://www.cjoffroad.com/writeup.asp?WU_ID=16&noAdd=1
http://www.geocities.com/reddjeep88@...mc2100swap.htm
etc. etc.

Ford Vehicles usually 70s
Jeep Vehicles with V8s

TBI is fuel injection. It utilizes an oxygen sensor. Additionally, it does away with the fuel bowl and thus flooding when at extreme angles. Fires right up and idles when cold. etc. etc.

The MC2100 does surprisingly well for a carburetor (probably the best off road carb actually).
________
Portable Vaporier Review

Chris90210 · 01-02-2008, 04:37 AM

I passed on that ebay auction I think i'd rather buy the parts separately. Thanks for all of the useful info.

The Black Sheep · 01-02-2008, 04:47 AM

MC2100 or im my case i use a modified Carter. Ive had mine running with the vehicle on its side before and with the exception of near vertical climbs i rarely have an issue (a high idle hookup works for that tho)

Good Luck

blkntancj · 01-02-2008, 08:15 AM

Propane

retardatwork · 01-02-2008, 10:12 AM

The mr gasket adapter and gaskets look like a better quality product than TRD 2086 although through all the searching the TRD- 2086 is always listed. I have read that some people have had issues with the gaskets sealing anyone have any input on this.

MR. gasket 1937
http://store.summitracing.com/partde...view=32&N=700+

TRD-2086
http://store.summitracing.com/partde...view=32&N=700+

atblis · 01-02-2008, 11:04 AM

I have the MR Gasket 1937. It works fine, just use good quality gaskets and don't over tighten it.

A aircraft gasket sealant would probably help. Make sure it's okay for gasoline.
________
Pornstar Webcam

T. Schmidt · 01-02-2008, 02:06 PM

Has anyone had any luck with a Holley Pro-Jection? T

retardatwork · 01-02-2008, 03:41 PM

Atblis are the gaskets supplied with the Mr. Gasket 1937 kit adequate? I noticed that the Mr. Gaskets gasket was an UPGRADE option for the TRD-2086 kit.

atblis · 01-02-2008, 05:41 PM

I can't remember, but am pretty sure they were. What you don't want are the really thin plain paper ones that you're likely to get at Adv or AZ. You want something that is somewhat thick and pliable.

In general it is getting really hard to get good quality parts for carbed vehicles. They don't give you the right parts anymore when you go to the store. Make sure you use things that are gasoline resistant. Gasoline will turn many things into jelly in short order.

________
IHNO

DaJeeper · 01-02-2008, 06:13 PM

Forget the difficulty in getting gaskets... I can't find a junkyard around here that has carbed vehicles in it.... I guess I'll need to go to Ebay to get the MC2100?

Chris90210 · 01-30-2008, 05:01 AM

or you can post in jeep wanted ads

I have all the parts and the carb is being rebuilt according to the specs provided thanks guys can't wait to get it on

12-30-2007, 11:45 AM	#1 (permalink)
Chris90210 Registered User Join Date: Aug 2007 Member # 97164 Posts: 38	Carburetor decisions So I need an intake/carb for a 4.2 engine I am building what would be my best/cheapest combo for light rock crawling. With exception of the crappy carters

12-30-2007, 12:10 PM	#2 (permalink)
rocknbronco Registered User Join Date: Aug 2005 Member # 51692 Location: Flat Top MTN,TN Posts: 1,780	A Holley Off Road Carb or Low Rider Carb. __________________ Space for rent sold it all....

12-30-2007, 05:54 PM	#3 (permalink)
atblis Registered User Join Date: May 2005 Member # 46937 Posts: 2,367	No contest No contest. MC2100 Use the stock intake, get the adapter (~$20), and run a MC2100 Webers suck ass. The Holley Truck Avenger is okay, but not better than the MC2100 (and is $$$). ________ Sophiexx Last edited by atblis; 08-12-2011 at 12:50 AM.

12-31-2007, 08:08 AM	#5 (permalink)
atblis Registered User Join Date: May 2005 Member # 46937 Posts: 2,367	Not really I would say no, but it kinda depends. Around me, I just go to the JY and snag one for $20, get a rebuild kit for another $15. You'll probably have to order a power valve, that's $10. Jets also, IIRC you'll end up paying about $20 shipped for a pair. 20 + 15 + 10 + 20 + _____ $65 The MC2100 is extremely easy to rebuild. I just use carburetor cleaner and a toothbrush. Now, if that carb off ebay comes with the correct jets, and the correct powervalve and is a fresh rebuild, than that doesn't sound too bad. If by the intake you mean the adpater, you can order that anywhere for about $20 Mr Gasket 1937 Transdapt TRD-2086 I am about to do a TBI swap. If that goes well, I'll have some MC2100s for sale. The TBI swap is something you might want to look into. ________ Live sex Last edited by atblis; 08-12-2011 at 12:51 AM.

12-31-2007, 10:29 AM	#7 (permalink)
atblis Registered User Join Date: May 2005 Member # 46937 Posts: 2,367	Yeah Ask him what size carb it is, what jets, and what powervalve. Don't tell him what you're looking for, just ask what it has. If he doesn't know the answers immediately off the top of his head, than most likely it doesn't have those things. Jets should be 46s or 47s 46s are about perfect for a stock 258 at sea level Powervalve should be somewhere between 8.5-10.5 Carb should be a 1.08 I was consistantly getting 21mpg with a stock 258, 3 speed and 33x12.50s running a 1.08 with 46s and a 9.5 PV (55 mph though). If it is has an electric or manual choke that's a little bit of a bonus. So if everything is in good working order, it has the correct jets/pv and is a 1.08, that isn't a horrible deal. You're paying a little for convenience, but... ________ Live Sexy Cams Last edited by atblis; 08-12-2011 at 12:51 AM.

12-31-2007, 06:16 PM	#8 (permalink)
DaJeeper Registered User Join Date: Jan 2003 Member # 16729 Location: Sebring, Fl Posts: 175	What is the doner vehicle the MC2100 comes off of in the junk yard? I just bought a Scrambler, 83, with the carter carb on it and I want to upgrade. Also, what makes the TBI better than carb? Since it's not pumping gas right into the intake ports like a MPI? Is a TBI worth the upgrade? What are the benefits? Jeeping up or down Inclines? Thanks, __________________ 83 Scrambler 258 SOA

12-31-2007, 08:17 PM	#9 (permalink)
atblis Registered User Join Date: May 2005 Member # 46937 Posts: 2,367	Some links Yahoo or Google search for "MC2100 258 swap" or something similar http://www.cjoffroad.com/writeup.asp?WU_ID=16&noAdd=1 http://www.geocities.com/reddjeep88@...mc2100swap.htm etc. etc. Ford Vehicles usually 70s Jeep Vehicles with V8s TBI is fuel injection. It utilizes an oxygen sensor. Additionally, it does away with the fuel bowl and thus flooding when at extreme angles. Fires right up and idles when cold. etc. etc. The MC2100 does surprisingly well for a carburetor (probably the best off road carb actually). ________ Portable Vaporier Review Last edited by atblis; 08-12-2011 at 12:51 AM.

01-02-2008, 04:37 AM	#10 (permalink)
Chris90210 Registered User Join Date: Aug 2007 Member # 97164 Posts: 38	I passed on that ebay auction I think i'd rather buy the parts separately. Thanks for all of the useful info. Last edited by Chris90210; 01-02-2008 at 04:37 AM.

01-02-2008, 04:47 AM	#11 (permalink)
The Black Sheep Registered User Join Date: Dec 2004 Member # 40587 Location: SouthEastern CT, Near South Rd./White Rock Posts: 3,062	MC2100 or im my case i use a modified Carter. Ive had mine running with the vehicle on its side before and with the exception of near vertical climbs i rarely have an issue (a high idle hookup works for that tho) Good Luck

01-02-2008, 08:15 AM	#12 (permalink)
blkntancj Registered User Join Date: Nov 2004 Member # 39016 Location: New Mexico Posts: 391	Propane __________________ Homicide: Our day begins when yours ends "Our Country won't go on forever, if we stay soft as we are now. There won't be any AMERICA because some foreign soldiery will invade us and take our women and breed a hardier race!" LT. GEN. LEWIS "CHESTY" PULLER, USMC

01-02-2008, 10:12 AM	#13 (permalink)
retardatwork Registered User Join Date: Aug 2005 Member # 51210 Location: san jose Posts: 441	The mr gasket adapter and gaskets look like a better quality product than TRD 2086 although through all the searching the TRD- 2086 is always listed. I have read that some people have had issues with the gaskets sealing anyone have any input on this. MR. gasket 1937 http://store.summitracing.com/partde...view=32&N=700+ TRD-2086 http://store.summitracing.com/partde...view=32&N=700+ __________________ [COLOR="Red"]cj7 SOA fullwidth thread[/COLOR] [url]http://www.pirate4x4.com/forum/showthread.php?t=538197[/url] Last edited by retardatwork; 01-02-2008 at 10:13 AM.

01-02-2008, 11:04 AM	#14 (permalink)
atblis Registered User Join Date: May 2005 Member # 46937 Posts: 2,367	Yeah I have the MR Gasket 1937. It works fine, just use good quality gaskets and don't over tighten it. A aircraft gasket sealant would probably help. Make sure it's okay for gasoline. ________ Pornstar Webcam Last edited by atblis; 08-12-2011 at 12:52 AM.

01-02-2008, 02:06 PM	#15 (permalink)
T. Schmidt Registered User Join Date: Mar 2006 Member # 69090 Location: Shawnee, Kansas Posts: 69	Has anyone had any luck with a Holley Pro-Jection? T

01-02-2008, 03:41 PM	#16 (permalink)
retardatwork Registered User Join Date: Aug 2005 Member # 51210 Location: san jose Posts: 441	Atblis are the gaskets supplied with the Mr. Gasket 1937 kit adequate? I noticed that the Mr. Gaskets gasket was an UPGRADE option for the TRD-2086 kit. __________________ [COLOR="Red"]cj7 SOA fullwidth thread[/COLOR] [url]http://www.pirate4x4.com/forum/showthread.php?t=538197[/url]

01-02-2008, 05:41 PM	#17 (permalink)
atblis Registered User Join Date: May 2005 Member # 46937 Posts: 2,367	You know I can't remember, but am pretty sure they were. What you don't want are the really thin plain paper ones that you're likely to get at Adv or AZ. You want something that is somewhat thick and pliable. In general it is getting really hard to get good quality parts for carbed vehicles. They don't give you the right parts anymore when you go to the store. Make sure you use things that are gasoline resistant. Gasoline will turn many things into jelly in short order. ________ IHNO Last edited by atblis; 08-12-2011 at 12:52 AM.

01-02-2008, 06:13 PM	#18 (permalink)
DaJeeper Registered User Join Date: Jan 2003 Member # 16729 Location: Sebring, Fl Posts: 175	Forget the difficulty in getting gaskets... I can't find a junkyard around here that has carbed vehicles in it.... I guess I'll need to go to Ebay to get the MC2100? __________________ 83 Scrambler 258 SOA

01-30-2008, 05:01 AM	#19 (permalink)
Chris90210 Registered User Join Date: Aug 2007 Member # 97164 Posts: 38	or you can post in jeep wanted ads I have all the parts and the carb is being rebuilt according to the specs provided thanks guys can't wait to get it on

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