NA high compression 1/4 ka24de times?

[mackdaddy240]

OK, I finally decided to go with all motor ka24de instead of ka24de-T because of lack of funds. Im building a ka24de right now and I'll have it in as soon as I get all the parts I ordered. Heres what Im doing.

92 ka24de, with new 1990 ka24e pistons.machining the head for higher comperssion.I'll probably be pushing a little more then 11-1 compression.ACT strip/street 4 puck clutchcheap OBX headers.full 2.5 in exhaust. no catInjen cool air intake.honed intake manifold.MSD plugs/wires MSD spark controller...? not sure which one to go with. Does anybody have any ideas??Was going to buy a lightweight flywheel but didnt think it was worth the $350 for NA.

So what are the 1/4 mile times for the average high compression 240 with standard mods?? just curious as for what to expect so post your times!!:D

[crzycav86]

low 15

[:: orion ::]

15.1-15.2 at 92-93mph.

I'd be impressed to see any faster.

- Brian

[mackdaddy240]

What about running advanced timing with cam gears and running 93 octane with partial race fuel mixed it.?

[mackdaddy240]

I'd like to break into 14s with no turbo. then next summer I'll switch for some forged pistons to drop compression down to 8-1 and turbo it if I can save up enough extra $$$$ Sucks going to college and trying to save money but hey, ya do what you gotta do. But since I'm in auto tech I might get some free dyno time if I kiss enough ***

[im two techno]

I ran a 15:6 on an open diff and im real sure i can hit a high 14 as soon as i get this clutch in dammit!!

[mackdaddy240]

Ok this is depressing, I went to the track the other night and ran a 16.2! It spun pretty bad in 1st no matter where I launched from, probably do to the ****ty race track I was on but either way 16.2 is really bad!Especially with act 4 puck clutch, msd digital 6 plus with a blaster 2 coil, port and polished head(not real polished I did it myself but better then stock) obx header no cat 2.5" exhaust injen intake, electric fan and Im sure theres something Im forgetting but anybody else have any more times I'd like to know.

[InsanityInc]

The OBX header is a piece of junk, your ignition coil isn't doing anything for you, and no, just because you've ported your head doesn't mean it's better than stock. It might "flow" better than stock, but the actual performance will not be as good, especially considering the engine is designed for fairly low RPM operation. Chances are you ****ed up your head, and aren't a terribly good driver, since you were spinning your wheels no matter what.

[Altiman94]

Sounds liek you need some better tires. Do you have an lsd?

[McAdam]

yeah, you can really eff up a head with a home port and polish. It may flow better, but there is more to producing power than flow numbers. Turbulance, velocity, and a lot of other technical stuff. 16.2 tho? that is bad. i think my old 280zx would run that.

McAdam

[nissandrift]

My car ran 15.9 w crap pacesetter header, junk 2.5inch exhaust, and no cat. With the original nissan clutch. Something is meesed up on your car. What was your 60ft, 1/8th, and trap speed? So we can figure out if it was your launch or car.

[ilsha]

the obx header is the same design as the hotshot header so i guess hotshot sucks to right InsanityInc?

[InsanityInc]

the obx header is the same design as the hotshot header so i guess hotshot sucks to right InsanityInc?

Well, I've seen dynos of both, the hotshot one far outperforms the OBX one, and I hear about people having serious quality control issues with the OBX one all the time. What are you considering "design"? The fact that the inital pipes are connected together in the correct order for the firing order of the engine? Woo, big deal. They don't perform the same.

[WDRacing]

As long as you don't ruin your port velocity you will make more power almost always. Your going to have to seriously remove some material to ruin the velocity. If your simply porting and polishing the casting imperfections you'll have small gains. The head will become more efficient.The key area to hit is under the valve seat.

With the skinny intake runners, which are extremely long, your velocity is not really a problem. The intake side shouldn't be polished to a mirror though, but the exhaust side should be as smooth as possible.

Gasket matching is also a simple DIY mod. Again you won't ruin the velocity if only matching the intake/exhaust to the head.

[w1ngzer0]

As long as you don't ruin your port velocity you will make more power almost always. Your going to have to seriously remove some material to ruin the velocity. If your simply porting and polishing the casting imperfections you'll have small gains. The head will become more efficient.The key area to hit is under the valve seat.

With the skinny intake runners, which are extremely long, your velocity is not really a problem. The intake side shouldn't be polished to a mirror though, but the exhaust side should be as smooth as possible.

Gasket matching is also a simple DIY mod. Again you won't ruin the velocity if only matching the intake/exhaust to the head.

like for example valve job and only port the exhaust side and just clean up the intake side don't port it.

[98s14inaz]

yeah, you can really eff up a head with a home port and polish. It may flow better, but there is more to producing power than flow numbers. Turbulance, velocity, and a lot of other technical stuff. 16.2 tho? that is bad. i think my old 280zx would run that.

McAdam

16.2? Man my auto s14 ran that with just a cone filter, exhaust, and open dif.

[Altiman94]

Id say you either are having traction or tuning problems or a combination of both. Driving skill is a factor here too.

[mackdaddy240]

yeah tractions a big problem, I'm running on some little 205 series tires, and they spray the back of the track with water so you can heat up your slicks, well I dont have any so that doesnt help. and they ran pro lights for some reason