Quote:
Originally Posted by ULTRAZLS1
So you are saying top fuel could be even faster if they went to OHC? Explain.
Id like to know how all those complex internal moving parts would work and hold up under 5000+ horsepower
What is the fastest time any ohc design has ever went in the 1/4? No car under any class has ever gone faster than pushrod (except for the rocket propelled cars of the 70's) Surely someone has pushed OHC to the limit.
educate me.
And Im not sure what you mean about driveability. 530rwhp (600hp) N/A LS3 cars built from nothing more than average joes with aftermarket parts (h/c/exhaust/full bolts ons/dyno tune) are perfectly driveable and reliable all day long and on pump gas at that. They do pretty good for a dinosaur. Id like to see you do that with a 4.6 or 5.0 OHC motor.
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Top fuel could be faster, easily. There are PLENTY of ways top fuel could be faster. The same ways F1 and NASCAR could be faster. They are at the level they're at to maintain competition and keep a certain level of safety. I never said DOHC had run faster times than any OHV design, you're getting ahead of yourself. You were talking about BMEP, so i commented on it. You will have a VERY hard time getting an ls3 to a BMEP of 220psi. If you do it, you will spend ungodly amounts of money. Even 200psi is going to be a WORKED ls3 with a big cam and some nice ass heads that will be in popular hot rodding mags because of the numbers it puts down. The BMEP comparison is bull shit when you're comparing the coyote 5.0 to the ls3 because an ls3 is going to need a lot of work to get to even stock 5.0 BMEP's , that is my point. Stop getting ahead of yourself, I'm talking about the BMEP comparison and telling you it's a worthless reference. I'm not telling you OHC is better in every way than OHV. I'm telling you it's more efficient, which it is, and comparing the ls3 at a given BMEP to the 5.0 at a given BMEP is bull shit because it will be extremely hard to get the ls3 to comparable BMEP. I'm not talking about overall performance or potential, I'm talking about BMEP because you brought it up and used it in a completely illogical comparison.
As for your question about how these complex moving parts would hold up under 5,000hp...top fuel runs at over 7,000hp and DOHC would hold up just as well as OHV; For about one race before having to be rebuilt... There is no real reason to use DOHC in top fuel because you are better off just increasing displacement when you aren't concerned about efficiency or reliability, like I said. Again, this really doesn't have anything to do with what we're talking about because no form of racing be it F1, NASCAR, top fuel, or GT Cup focuses on what the production car market does. What should be of interest to you is the fact that the forms of racing that allow the most tech and limit displacement instead of specific types of designs, use mostly OHC designs, almost all using DOHC (bike, f1, f3, etc.).