Here is what I have at the moment

converted vic intake, 4150 bilet TB, Gen7

Now my question is would I make better power with a pro systems dominator and super vic. This is a race only car.......they fuel injection seems like more trouble and make the same or less power.

I know the arguments of both side and would really like some reasoning behind them

 

This question can go either way, but for a race only car I would go carb. Since you already have the parts for fuel injection I don't see any reason to switch though. Plus you should be able to data log the car after each pass and make adjustments if needed. Also helps out a little if you are running nitrous cause you can program the hit(s).

 

Efi tuning on a drag car is a pretty simple proposition, the only cells you have to even worry about are WOT. You should be able to go to test and tune and figure out what the car likes fuel and spark wise with a few shakedown runs, after that just adjust your fueling on a couple of runs at whatever track you're going to run at the day of, to match the fueling with ambient conditions.

Carbs are fine pieces of equipment too, but the thing with a carb is when you pull it out of the box and put it on, thats as good as its ever going to be mechanicly. The other thing with a carb is, i cant take out 2% fuel only at 5000 rpm and nowhere else, perhaps you're that good, but i personally am not. Also to be considered, is a carb will run fine in a half *** state of tune, and efi wont be quite as forgiving.

Really it just boils down to personal taste and how much leg work you're willing to do, and just how finely tuned you want your ride to be. For me its an easy question, you already spent the bucks on gen 7 so run it.

 

Tuning is my biggest issue and how consistant is the DFI....I haven't seen it perform very well in a bracket car first hand. Last sat with a carb we went 10.01, 9.99, 10.08,10.09, 10.06, 10.05, 10.02 I have never seen efi run number like that.......maybe b/c not many people run it?

 

I've seen efi cars run numbers like that. Tom Guellich's third gen always runs the number.

 

My bracket car runs EFI and is very consistent. However, I run methanol which is known to be more consistent than gas. Before I switched over to EFI I ran a carb. It was also very consistent, maybe even a little more so. But that was partially because the carb was deliberately sized small - it was an 850 and the car could have used a 1050. I am using a 2,000cfm TB! I gained ~60rwhp with the swap. Yeah, with enough fussing I could have made as much hp with a carb, but I don't think it would have been as easy. Tuning with the EFI took about an hour on the dyno and a couple of passes on the track. Didn't touch it after that for a whole season, until the next year when I made some changes. And changes can be accomodated incredibly easily. This year, I got new heads. It took more time to stap and unstrap the car from the dyno than it did to tune it.

Still, there is a lot to commend a carb in a track only car. Even so, I prefer EFI.

Rich

 

Get one of these for your intake--- set it and forget it.
http://www.ronsfuel.com/[/URL][IMG]"]http://www.ronsfuel.com/[IMG]






These are nice too.



These are EFI

 

I went with a super vic and a dominator as its hard to beat for overall cost,Im really happy with its performance and tuning is easy with my fast a/f meter. I like FI its just so dang expensive at the higher power levels.

 

Alcohol, LR?

 

Either+nitro
These are just examples. They can be jetted either way. The right pump,nozzles,jets has to be purchased to get it right.

 

I looked at the flying toilets before......being as I knew nothing about it and got no help everywhere I asked I was not comfortable with it.

I am going to try the fuel injection and possibly have a carb set-up to swap in and try also.

My cowl is cut to the windsheild with a lift off hood so a distributor and all that stuff is no problem and will be a fairly easy swap

 

Which set up?

Go here and see what ya like:http://www.racingjunk.com/
Go to: engine parts\intake manafold.
If ya get something let me know and I will be more than glad to help ya set it up.
It's pretty simple when I can touch it-- Don't know over the net but I can get ya to understand.
Just 'cause it don't say SBC on the add doesn't mean it won't work. BB stuff can be jetted(each nozzle has it's own jet) or if they are for a 706CID new nozzles are not that expensive. If it comes less manifold it will fit .
http://maxchevy.racingjunk.com/post/...4-shooter.html

Like this above.

 

 

This is pretty much what I have now.....minus the gas plummed in. I just have a plain 2" spacer(needed it to clear the linkage/fuel rails)

My TB is the same as that one

 

Get it on the engine and go racing.
I prefer the mechanical but if ya got a FAST and time that will get it done.