KL & K8 Head Measurements

Slammed6 · Post by **Slammed6** » April 4th, 2007, 9:56 pm

I have been searching all over the web for this info can someone help me out.

I need to know the CC of a K8 Head Combustion chamber, also if you have the CC for a KL Head Combustion Chamber that would be greatly appreciated.

And if anyone knows the thickness of a stock Mazda KL head gasket i would appreciate that as well.

mx3autozam · Post by **mx3autozam** » April 5th, 2007, 1:29 am

i ahve head gaskets in my garage. i will take measurements for ya 2morrow!

Slammed6 · Post by **Slammed6** » April 5th, 2007, 2:04 am

Thanks.

I have a set of KLZE heads on the block in my storage, i guess i will just remove them and get them cc'd...unless someone can help me out.

93_MX3 GS · Post by **93_MX3 GS** » April 5th, 2007, 12:45 pm

heres a post i found by David Coleman in aug 01 some k8 info

Hey all,I've just been milling around in my head ideas for K8 tuning, and I figured I'd bounce my latest one off of you. I'd like to put a KL crank and rods in a K8. Doing the calculations shows that the K8 stock combustion chamber is about 33.42cc's, with the swept volume being 307.48cc and the CR being 9.2:1. Swapping to the 74.2mm stroke over the stock K8 stroke of 69.6mm will bring the swept volume to 327.81cc and the CR 9.8:1. The motor's displacement with the KL stroke/K8 bore would be 1967cc's. With a 9.8:1 compression ratio and almost 2 litres of displacement, I'd think that would be a very torquey motor for street driving with hopefully 120 ft/lbs of torque at around 5000RPM or so.I don't believe this would be too expensive, as I can get KL bottom end parts from some probers for dirt cheap after they part out their KL03's when they swap to ZE's. They can usually get rid of the top end of the motor, but 90% of them get stuck with the bottom end sitting in their garage. So demand is low, supply is high. I would wager that the most I would spend for a KL crank and 6 rods would be $200USD. I'm picking up some old K8 heads to do a little port and polish work to; mostly line of sight, cleaning up port work. However, if I were to build up a KL/K8 hybrid, I suspect that larger ports to offset the small valves would be good for the increased swept volume. So for under $300USD for the main parts, I could have a nice torque boost for less than my clutch cost. Of course, I don't know what bearings and gaskets I'll have to replace.A long time ago I posted about a KL crank/rods in a K8, in my early, ignorant days of MX-3 tuning . If I recall correctly, Vaughn mentioned that it would be alot of work. Something about grinding the block for clearance or something. I'm not sure if I want to do that. I just crunched the numbers this morning; I'll be looking at my shop manual this week and looking at what parts specifically will need to be replaced, as I've never even seen a crank in a car. Yet. Currently a KL swap is out of the question for economic reasons; I'm not going to buy a cheap KL03 for $800 now when I can wait till I graduate and pick up a ZE or build up an 03. I suppose in my 20 years I've developed a wee bit of practicality. But not enough to prevent me from tweaking my K8 powered EC into a strong street car!So do you guys have any comments or suggestions? ------------------ David Coleman- Moderator <A>1993 Mazda MX-3 GS Special Edition</A> <A>Wu Name</A>

orignal post:
http://www.mx-3.com/phpbb2/viewtopic.ph ... oker+motor