He says the efi will make the engine a little more torquier'... but might give up some top end and wont make the raw power the carburetor will.... so what are your thoughts... im gonna make a decision by Wednesday so opinions and thoughts are welcomed

 

. That type of EFI should make just as much power as same CFM size carb...

. I don't see $1900 in difference between TBI and well-tuned carb...

 

Well the carburetor itself is about 600.00 ... 1300.00 difference ... im sure the constant refilling of gas could add up within a few months.... but I still have to buy a gas tank with a return line... not a big deal

 

I would be happy with the carburetor. Is there a reason you want to switch to fuel injection? What car are you contemplating doing this to?

 

the electronic fuel injection kit is going on a 1957 Chevy truck. I just got off the phone with someone from easy electronic fuel injection and they said that I could run the camshaft I had chosen with their kit. I was lookin for the best overall package and comfort as well and simplicity. Im not a carburetor specialist by no means... he actually said I would make more power with the fuel injection than the carburetor.

 

Before I jumped on that I would jump on this Chevrolet Complete MPFI System . I am running their tbi system on my boat and couldn't be happier with it. The systems use gm sensors and gm ecm's so everything is readily available at any parts store. Their mpfi systems are batch fire instead of sequential fire but still a better system than the fast tbi kit.

I really doubt your gonna gain anything going from a properly tuned carb to a tbi system except a lighter wallet. Going from a carb to a mpfi system you'll probably see a little better throttle response along with more even fuel distribution but again probably not more power over a properly tuned carb and distributor.

If you decide on the fast efi find out if the kit offers ignition control. No point in having efi if it doesn't control the timing also.

What transmission are you running?

 

Thinking between a 700r4 ...4l80e or a 4l60e... some kind of overdrive....

 

Oh, so this is a brand new never ran vehicle? If you have to buy a new carb and distributor your pretty much at the same price as a tbi kit from affordable fuel injection. There is also Howell efi but they are a little pricier than afi. If you decide to run an electronic transmission you should talk to fast efi or whatever way you decide to go about running the trans with the ecm. I know afi can do it.

I don't want it to sound like I'm promoting afi, it's just the company that I went through for my efi system and am very happy with it.

 

Okay, just read a little bit about the fast system your looking at. I don't think the system has ignition control which is one of the major benefits of efi. Unless you can get fast to tell you the particular system your looking at has ignition control I would definitely pass on it. They may offer kits with ignition control though. It's still pricey for just a tbi system. I also read that the fast kits use a lot of the stock gm sensors which is a plus but the ecm might be pricey if it ever needs replaced (check warranties).

 

How much power are you planning to make?What type heads are you running.If Vortec heads,the Ramjet EFI is the way to go.If you don't buy the POS mefi controller,you can do it for less than $1900.The mefi controller is not accessable for tuning except by a very few places & can't run an E trans.Use a 0411 GM controller to run it & your transmission.Once you get your injectors sized rite for your app & your tune dialed in,you're thru.No more fiddling or messing around.It can make just as much power as a carb & be a lot more dependable.You can also use the 96 to 99 black box PCM,but,the 0411 offers a lot more tuning options.If I were gonna buy an EFI system,i'd go MPFI vs TBI.

 

. Are you planning a 383" with Profiler or AFR(more $$$) heads?

. HR288 (236/242) is a big cam for a '57 truck... are you aiming more for strip use than street... back in Feb. you said street use only... torque... which would be about an XE262 or XE 268 cam... or XR262/268 in roller cams (~$600 more)... or smallest Thumpr cam if you love the sound...

. Can prolly find a nice used 650-700-750 carb. for around $150... (800, 850 too big for pure street use, unless get a steal on it)

. Good MPG will depend mainly on having decent high compression ratio (~10.5:1) and good quench effect (.035"-.045" piston-head clearance)... not going too big on cam...

. 4L60e tranny is the electronic computer shifted version of the 700-R4 tranny...

 

Its not too big a cam shaft... its just right for what im doing and the truck is only about 3500 lbs.... lol dont underestimate a truck. .. you seen daddy dave lol.. yall watch street outlaws?

Afr 195 heads... 10.5 compression... yes ita still a street only truck...

 

If your building a kit to compete with daddy Dave the fast kit is not the way to go. Averaging 150 mph in a 1/4 mile is not done with a 750 carb either.

 

. Never heard of or watched that show... don't have cable...

. A cam that big can be irritating in town traffic when the engine doesn't want to go much whenever below 3500 RPMs when you give it the prod... also, not enough vacuum for power brakes, if used...

 

I have 1 TV and it is almost always off.

The carburetor is a simple effective device. I like what they do and how they do it. If you understand it, you don't need much else.

There is no reason that cam is too much for a nice 750.

 

Yea I told him imma keep the carburetor and go efi later down the road... u think the xr288hr will do more harm then good? I was only using it more as a weekend toy or a drive at night on the highway.... I was even considering sticking the th350 back in after a rebuild.. I know the th350 will keep the rpms where the cam likes it

 

I have a quick fuel 750 coming in

 

You know, at the 4th car show, they had a 350 with the edelbrock rolling thunder cam. It sounded real good, only the slightest hint of cam idle. Probably the best daily driver or cruise night cam I heard in a long time. Very mild though, a good grind.

Made 2" less vacuum than a performer build, but had about 30-40 more hp. Similar manners otherwise.

 

That truck is wicked fast though!

 

That rolling thunder cam is awesome. Perfect for a drive thru car show type crowd. Just enough and grab a good 750cfm, it would cruise highways at night real nice with a 700 trans.

 

LOL... no im not competing with daddy dave... he has a 632 and I have a 383.... I was making a point that a truck could perform just as good as a car especially one that is not 4000 lbs or more....

 

Not to continue if subject but to those who don't know who daddy Dave is.

The Sonoma|Daddy Dave

 

Spinn'.... the problem is most tranny builders are telling me the 700r4 cant hold up to a 500hp/500tq engine... they recommended a 4l80e. ...th350... or th400

 

Yep,you are in TH400 or 4L80E territory.You can spend a fortune on 700R4/TH350's fixing them when they break.Then you get tired & end up going to the 400/4L80E in the end,so,go ahead & do it now to save yourself the money,work,& downtime.They can be built to handle it,but,there will always be something.That much HP/tOrque is just beyond their design limits to handle reliably.

 

Not to throw out another vendor but give Dana at pro built a call. 700R4 & 4L60E Automatic transmissions specialists - ProBuilt.

 

By the time you buy a built 700R/4L60E or have it built for that kinda power,you could buy a new 4L80E that would hold up better,not,counting subsequent repairs/rebuilds when the other breaks.Then after you've set crossmembers,wiring,new driveshaft,etc for the 700/4L60nyou'll to change it all if you decide to go to the 4L80.It will be cheaper,easier,a lot less trouble to just do it upfront.The 4L80E will use a lil more power,but,the gearspread will more than make up for it.If this is a new build,now would be the time to do it.

 

. For occasional night / weekend usage, prolly just stick with the TH 350 unless planning cruises longer than about 15 miles...