10k in pocket. New block or EFI ?

[cobrarkc]

Ok I am a little confused here. If carbs are so good why aren't they using them in Top Fuel and Formula 1?

[Great Asp]

Originally Posted by cobrarkc

Ok I am a little confused here. If carbs are so good why aren't they using them in Top Fuel and Formula 1?

G forces? (I'm guessing)

E

[Cobrabill]

Originally Posted by cobrarkc

Ok I am a little confused here. If carbs are so good why aren't they using them in Top Fuel and Formula 1?

Top Fuel is at the ragged edge of everything.Nitromethane is essentially liquid dynamite.Fuel management is critical.And as stated earlier,forced induction changes the ballgame completely.On my SCCA car,i run FI and a turbo.I wouldn't even THINK of running a Turbo w/o FI.


As for F-1 cars,peak power isn't as critical as in "straight liners".This is the readers digest version as i am not a F-1 guy.

[dlampe]

Sorry, I am just catching up with this thread. The point I want to make is that I don't spend a lot of time at WOT, although I do spend a lot of accelerating to that point then back down then up again etc. I ran the Weber's on the track and they felt good. Rodknock is right, they were tuned pretty good. I want to say that this is not up for debate. This is fact as it relates to MY car. The Weber's with 40mm chokes couldn't keep up with my engine over about 5200rpms. I switched to 45mm chokes and I lost everything under 4000. Thats not good coming out of a tight corner but it really ran on the top end. In that case, the Weber's probably gave me everything the EFI did at high rpms. You just couldn't drive on the street or at low rpms. The FACT is that a 48 IDA doesn't have the range needed to function at optimum levels with moderate to large cubic inch engines at all rpms from 0 to 8000. The Weber's had almost identical numbers up to 5000 rpms as the EFI but that is were the EFI kept climbing and the Weber's died. In the end, they look identical and run smoother with more range. A four barrel isn't part of my option list. As for cost, The Weber's made in Mexico with manifold are about $3000 plus a few sets of chokes at $30 bucks each (you need 8 at a time), emulsion tubes at $17 each and every jet change takes 8 at between $8 and $12 each and there are at least 32 jets in the set up. The price isn't that different.