smracing wrote:If you look at power/weight, both cars are slow. 1200hp at 2300 lbs should go quicker than 7.40.
yea they should. but my brother talked to the guy when they were out at the track.
he asked him how was the chassis setup the guy said horrible. why didn't really say but the rhd drive set up.
TinyT wrote:this thread is retarded. cant tune a rhd chassis? wtf are you talking about haahahhahaaha
i never said tune the chassis. suspension! instead of the driver on the left side of the car to compensate for the torque of the motor on the launch.
its a little harder to due so on a rhd car vs. a lhd car
i want to see what they can do with it....I wonder how radical their head porting on the ka was? If you can get a engine to handle 65lbs of boost they should make 1000+hp
KA24E-T 06/06 to 10/09 (T25 then H1C Holset) - sold
KA24DE-T 12/09 to 10/11 (T4/TO4E) - sold
KA24DE-T 11/14 to 8/15 (T4/TO4S BB) - sold
SR20DE-T exo-car build 06/13 to 3/16 (EFR6758)
^ now VH45DE-T 6/16 to 10/21 (Billet T04S BB)
^now KA24DE-T 1/22 to current (EFR 7163)
Miata 1.8 turbo 9/15 to 3/17 (VF39) - sold
KA24DE-T build 8/17 to 4/19 (EFR6758) - sold
12.6:1 Turbo KA-T 4/19 to 7/21 (EFR7163) - sold
Weight?? Every pound and tenth of a second adds up at the long end of the track. Personally I love the cast block of the KA, kinda of wish they had a cast head to. In my opinion Aluminum is to prone to heat warpage if you accidently over heat. In a way, I sort of hope it FAILS them going with the SR. In another way, it is a Nissan 240, and if its wicked fast, I will have to like it.
The only major difference between aluminum and cast iron, is weight, and heat displacement. If you had two heads that were identical with the exception of the material they were made of, they would flow exactly the same. Personally I would prefer this http://www.rlengines.com/Web_Pages/extrudehone.html but its pricey.
Aluminum is a much better conductor of heat than iron.
My heat/mass/momentum transfer book gives the following thermal conductivities (k) @ 212/572 F
Iron = 39/31.6 Btu/(hr*ft*F)
Aluminum = 133/133 Btu/(hr*ft*F)
Welty, Wicks, Wilson, Rorrer, "Fundementals of Momentum, Heat and Mass Transfer" 5th Ed, 2008.
Heads aren't pure aluminum and cast iron isn't pure iron, but you get the picture.
Resistance to heat transfer is proportional to (1/k)
Conclusion:
Cast iron = **** for performance cylinder heads
my bet isthey went SR for the rpm, with a huge turbo you need huge rpm or displacement to getup in the boost. im sure you could build a SR to hit 11,000rpm+but a KA would never do it unless you destroked it.
they are also at the point where they need a sleeved and filled block.. so who cares what the block starts out... and i bet the SR takes the sleeves better, the bore centers are wider i bet, so more room for sleeve.
i could only see a little bit of the first video. i have seen that car before.
i can't get on any thing els wile at work. whats the dicplacement on that eclipse?
nhra might limit the dicplacement on those car's. maybe why dps when to the sr?
and you know they have over 100k in just the chassis so you can only imagine the money in those motor's.
If you could get it to spin to 8500rpms reliably and get your torque to hold on till then, you can make a pretty nasty power band with the stock displacement.
The hta gt3586r has put down a hair over 700whp on a few occasions. I could imagine that turbo coming on around 4500rpms and singing till around 8500rpms. I would kill for a 600whp 4 cylinder with a 4000rpm powerband.