Need help building a race KA24DE N/A !! Track Rules included!!!

[Frankenfourty]

what will those piston rings do to the compression if checked by the track..[/QUOTE]

They wont raise the compression at all. They just hold more of the compression thus making more power. In a stock motor some of the power is lost by "blow-by", these rings eliminate that blow-by. So they wont do anything to the compression ratio since they don't decrease the volume of the combustion chamber....let them check it all they want, it wont change anything.

[Killer B Racing]

Yes it is with the driver.

These car's never see the puplic roads, so what ever it takes to make top end power.

[Killer B Racing]

This is great stuff! I checked out the Brian Crower stage 3 cams, but I am curious on the modifications that are required to run these cams and the potential power.

Would the SR20de be a better engine to start with?

[locoluna825]

i thought you weren't allowed to swap the engine out didnt the rules says something about stock engine only?

[dimedriver]

Yeah, engine swaps are not allowed. Some drift stuff may allow that but not Nascar or SCCA. It says no balancing allowed? What if you went and bought like I don't know 8 sets of pistons and weighed them all and pick the set of four out of the bunch that were closest to the same weight. Then did the same with the rods. Then returned the unused sets. Oh some of the 240sx ecu's will cut ignition if the engine is running some high rpm and it thinks the car is not moving. So you may not want to cut the speed sensor. If you have the ECU that has a big 10 on it you should be good though. Your going to need to chip it. The problem is with the DOHC ECU a daughter card is needed. I sigest Nistune and an innovative or techedge wide band O2 sensor and a trip to the dyno. After cams injector mod and the exhaust is on.

No cat is needed these cars have 3 to 4 foot long exhausts. The only requirement is a "Muffler" and it exits behind the drivers seat. Just get a cheery bomb or glass pack. make sure it does not have "scallops" that cut into the exhaust stream.

I want to build one of these now.-Avery

-Avery

[Killer B Racing]

The engine rule states "Stock OEM for year and model of car used" it mentions nothing about "original". If I can prove that it was available any where "see jdm" in which it was then its what we call the "grey area". It 's a pretty vague rule don't ya think ?

[locoluna825]

The engine rule states "Stock OEM for year and model of car used" it mentions nothing about "original". If I can prove that it was available any where "see jdm" in which it was then its what we call the "grey area". It 's a pretty vague rule don't ya think ?

Your car is 240SX not a jdm 200sx or s14 silvia, so i don't see you winning that argument there.

isn't that sr20de a front wheel drive motor? if it is. and if you do get it your car. your gonna loose 10 hp or more because a rear wheel drive car has more parasitic loss through the drive train than a front wheel drive so you might end up back where you started or even less with the horsepower.

[liquid_cool]

This is great stuff! I checked out the Brian Crower stage 3 cams, but I am curious on the modifications that are required to run these cams and the potential power.

Would the SR20de be a better engine to start with?

with the larger lift and larger lobes..you only need to clearence the valve spring area where the buckets sit so that the lob can rotate in the head...i have some pic's in my myspace photo's somewhere...its only minor clearencing..i did it with a dremel tool...the cam profile is noticable at idle..sounds like a SB chevy with 15:1 cr..lol...upper end it screems and you can definitly feel the powerband kik in...but..the duel springs are the key..you might be able to get away with Ti retainers as they are under the buckets and hidden out of sight...lol..just a thought...hope this helpd man..good luck.

[dimedriver]

If/when you get it chipped get the tunner or dyno shop to make it a totally open loop system on AFR. Loose the O2 sensor and run the 110 leaded gas. I guess you could leave it in the exhaust stream and hooked up but the ECU will not do anything with the data. The lead is going to kill it anyway.

Whats the highest anyone has revved a KA for long periods? Not a down shift to 3rd at 60mph or anything like that.

liquid, do you have a dyno sheet from your cam? What is your redline set at now?

-Avery

[liquid_cool]

If/when you get it chipped get the tunner or dyno shop to make it a totally open loop system on AFR. Loose the O2 sensor and run the 110 leaded gas. I guess you could leave it in the exhaust stream and hooked up but the ECU will not do anything with the data. The lead is going to kill it anyway.

Whats the highest anyone has revved a KA for long periods? Not a down shift to 3rd at 60mph or anything like that.

liquid, do you have a dyno sheet from your cam? What is your redline set at now?

-Avery

i have no dynosheet..im broke..that cost money at this time...but i regularly rev past 7000rpm with no worries..my powerband sits between 4500 and 6500...1st and 2nd are qwick gears for me but she opens up at 3 -5th..with my limiters off...

i um..participated in a kinda road test against a supra last night down St.Rose Pkwy here in vegas..i held my 7000rpm limit in 4th just for kiks for probly 3 mins with no adverse effects on the engine other than heat..BTW..he backed down from our challenge..lol. if i had more numbers for you, i would gladly give em up..but till then..i hope this helped a little bit.

[Killer B Racing]

this is geat stuff guys, I'm gonna pass it along to a few different engine builders, I know a builder that specializes in road race type cars and and imports , I guess he is pretty good with tuning too.

I'd like to sell my s13 if any one is interested $2800 with spare car.

then I will build the s14.

[Frankenfourty]

Another thing you can do if you don't want to run the cower cams, is you can run a exhaust cam from another KA24DE on the intake side. Thus running two exhaust cams. That will give you some more top end.
Modified by brian's13'240 at 10:56 AM 9/29/2009