newb with an interesting block purchase

[rpholz]

so i'm doing everyones favorite swap, ka24de into a ae86 chassis.

well, its a carb'd 4ac auto SR5 chassis, so im not ruining a perfectly good car, i actually yanked it out of the weeds...


anywho, so i bought a long block from a local guy who knew nothing about it, said it was in the back of a 240 he bought and it was "rebuilt"

so i tore it down today and realized, its a 1998 240sx shortblock via the vin on the side and i'm assuming a frontier head as it has 5 cam caps as opposed to 6. my question is, are there any downsides to this head? if i spin it to 7k rpms will the last lobe come free from the rest of the cam? any suggestions as to upgrades while its apart? i am currently doing rings, bearings and lapping the valves for peace of mind and later plan on cams. also debating on on running carbs as the chassis is carbed and i wouldnt have to fool with converting it to efi, but im uncertain of this plan.

so any advise on the head or any preventive work that i should do now would be super beneficial. thanks

[frapjap]

Welcome to NICO!Thats a pretty unique build that you've got in mind.
I'm not able to help you out a ton, but papasmurf might be able to get you pointed in the right direction- he's got loads of knowledge. Add a link from this thread to this one:
the-i-m-new-here-and-i-have-a-simple-qu ... 13343.html

Good luck and don't forget to start a build thread and take photos as your project progresses!

[rpholz]

Will do!

Btw I love the sig. A lot of my buddies drive NAs and I owned an NB for a little while.

[rpholz]

Link to build thread.

ka86-t589501.html

[PapaSmurf2k3]

I'm not too familiar with the Frontier KA head, but I'd be willing to bet it has different cams and/or valves to yield a different torque/power curve more suited for a truck. You could most likely verify this by looking up the cam and valve specs in the FSM (www.nicoclub.com/fsm)

If it were me, I'd get a known head... and it sounds like you're tearing everything down anyway, so you could get one that hasn't been rebuilt.

[PapaSmurf2k3]

OR you can roll the dice with the engine you have and just run that bad boy. If you blow it up, who cares... KAs are like $200 hah.