I just bought a 72 Lemans with a 400cui and I'm wondering what will be the best carb to use on this engine? Any input from you guys out here?

Asked by Feb 23, 2012 at 10:02 PM about the 1972 Pontiac Le Mans

Question type: Car Customization

3 Answers

4,325

What are you trying to accomplish? Performance or economy, or a reasonably street-worthy balance that won't break the budget? Do you plan to keep the existing 4 bbl manifold? If it's a 2 bbl don't bother changing carbs, you won't see any improvement in any category. As far as the stock Rochester 4bbl... it's probably a better carb than most aftermarket ones for general everyday street use and reliability (If it's working correctly). To see any sort of gains in performance you will need a new manifold. If your carb is shot, the Edelbrock 1407 (750 cfm) is as large as you should go on the low-compression '72 engine. Another option you might consider is a Snow methane injection system, which is about the same cost as a carb, and will get you more HP, better mileage, let you run on cheaper gas, and is a 3 hour install with ordinary hand tools. Good luck!

3,055

gotta agree with norm ^ , holleys are getting very expensive these days , i bought a 750 w/vacuum secondaries about 7 yrs ago for 350.00 brand new , now they want about 450-500.00 bucks for the same one ,but you do get a nice trottle responce, on the other hand the stock rochesters are awesome for the street and a lot of companies are rebuilding them like summit,but if you order from summit call their tech line @ 330 630-0240 and they can hook you up with exactly what is best for your engine, even if you don't buy it from them they will still help you out, their regular sales people know shit about cars. good luck

3 out of 3 people think this is helpful.

Thanks Fella's

Your Answer

Add photo

Related Questions

  • 1971 Lemans, all numbers matching 7 answers

    I purchased a 1971 Lemans. It is going through off frame restoration at the moment. My husband is a GM mechanic and he has had problems finding information at work about this car. I know its not a spo...

    1971 Pontiac Le Mans

    -

    Car Customization

  • recovering car seats 6 answers

    I am about to start recovering my seats I bought the nicest kit opgi had and i was wondering if anyone has any pointers or things to watch out for the kit came with the hog ring pliers and a bunch of ...

    1969 Pontiac Le Mans

    -

    Car Customization

  • Choosing CFM carb - '72 Pontiac Lemans 3 answers

    My engine is the stock 400 cu in 6.6L, I don't know if this is enough info to determine an answers so if not ask what you need to know because I really wanna figure this out

    1972 Pontiac Le Mans Base

    -

    Maintenance & Repair

  • 1968 LeMans Convertible newbies. 5 answers

    My Wife and I just picked up a 1968 LeMans Convertible tonight. This is our first project car. It need some carb work and has some damage to the drivers side rear quarter. Not too much rust and the...

    1968 Pontiac Le Mans

    -

    Maintenance & Repair

  • Can I find out the history of this car? How many were made and exact ownership on a specific Lemans? 9 answers

    We bought a 1973 Pontiac Lemans. Would like to know if possible to trace history of ownership of this car? Would also like to find out more about LeMams in gereal: How many were made, cost, options av...

    1973 Pontiac Le Mans

    -

    General

Le Mans

Looking for a Used Le Mans in your area?

CarGurus has 18 nationwide Le Mans listings and the tools to find you a great deal.

ZIP:

Search Pontiac Le Mans Questions

Pontiac Le Mans Experts

#1 Rucko
Rucko
Reputation 440
#2 Js08016
Js08016
Reputation 170
#3 Daniel Perron
Daniel Perron
Reputation 160
View All

Related Models For Sale

Used Pontiac Firebird
11 Great Deals out of 817 listings starting at $3,800
Used Pontiac GTO
9 Great Deals out of 492 listings starting at $5,900
Used Ford Mustang
678 Great Deals out of 38,414 listings starting at $1,963
Used Chevrolet Camaro
658 Great Deals out of 39,376 listings starting at $2,995
Used Dodge Challenger
414 Great Deals out of 25,354 listings starting at $7,980
Used Chevrolet Monte Carlo
16 Great Deals out of 1,728 listings starting at $1,695
Used Dodge Charger
529 Great Deals out of 28,971 listings starting at $2,275
Used Chevrolet Nova
197 listings
Used Chevrolet Corvette
352 Great Deals out of 20,285 listings starting at $3,688
Used Pontiac Grand Prix
26 Great Deals out of 3,749 listings starting at $1,195
Used Ford Torino
41 listings
Used Chevrolet Impala
927 Great Deals out of 36,332 listings starting at $1,800