Intake Manifold Question

[240nismo]

Ok, i've searched and searched, i can't find any after market intake manifolds for the Ka24e. I know there was a forum on here a few weeks ago that said something about them, but i can't find it now. So if anybody can tell me where i can find an intake manifold and how much, or should i just port and polish the one i have now. (My goal HP is ~475-550rwhp) Thanks!

[SingleCamSam]

check out http://www.back-yard-productions.com

bring yer wallet....

[240nismo]

haha!! $1,100.00!!! Screw that, i'll Fabricate one myself. Anything important i should know before i attempt this?

[SingleCamSam]

Yup, that you don't have to do it. I'd say the stocker is big enough for your goals. Maybe just replace the upper plenum and leave it at that. Or have it extrude honed. I'd concentrate more on getting more air into the combustion chamber. Cams, port job,bigger valves etc. You've got to flow alot of air to make 500+hp.

[240nismo]

i've got all that already done, i just need to slap on my T-61, but im getting input first. In the TurboKA section, WDRacing said something about a 3 angle race grind for my valves, do you guys know anything about how to do that?

[U12 2NR]

i don't think you should replace the upper AND lower manifolds...if you can, just make your own upper manifold. If you look it with a little imagination you can see why the collector doesn't flow well. The lower manifold is pretty nice for torque. If you're turbo'ing, just remove the secondary butterfly's from the lower manifold for better high end performance (which is where you need it). you could just use the upper manifold gasket as a template to getting a flange cut, and build it from there.

[phoenixR34]

http://www.thunderfabrications.com

They can modify your stock manifold for a short runner system for around 400 bucks, or they said they can make an entire new manifold for ~600. Not a bad deal really. I saw one of their KA24DE manifolds and it looked pretty nice.

[240nismo]

if i decide to just leave the intake manifold the way it is (except im going to remove the butterfly's and port and polish the upper and lower manifolds and match port) will that withstand the power i want out of my engine? Thanks for everything so far, lots of help:)

[SingleCamSam]

Your good to go. Extrude honing is a good option if you feel you need more flow. Once again, bring your wallet.

[hannibal]

the 3 angle valve job involves reshaping the area where the closed valve touches the intake/exhaust port. I'm not sure how exactly this improves flow, but they grind the valve so it sits better. Sometimes they modify the actual entrance to the port itself, too.

Jay

[sleepyS13]

3 angle valve jobs smooth out the flow at the most crucial point. it makes the transition around the valve face more gradual, even though it may not look like a big deal air at this point is moving extremely fast and small improvements make a big difference.

there are also 5 angle and full radius valve jobs but the 3 angle is best power per dollar . the later two are a lot more expensive and may not be worth the extra money but then again that is a lot of air flowin at 500hp.

[240nismo]

When removing the intake manifold what is the easiest way to remove the 3 bottom bolts? The front one (near the 1st cyl) is easy, but i can't seem to get to the two further back on the underside of the intake manifold... HELP!

[SingleCamSam]

Hate to tell you man, but unless you've got some serious manual dexterity your best bet is probably taking the heads off, or pulling the whole engine. Anybody else know an easier way?

[240nismo]

no, i found it, im just a F-ING idiot, but eventhough i have all the 7 bolts out, i can't get the intake mani off the block?! i tried pounding it with a dead blow hammer and a pry bar, but it wont come loose, nebody know whats up?!

[U12 2NR]

there's absolutely no need to remove the head from the engine just to do something simple as an intake manifold..that's crazy. Pulling the whole engine is just retarded.

anyway, if you're removing the lower manifold, look below the manifold, there should be a bracket bracing the manifold onto the block.

[SingleCamSam]

Quote »there's absolutely no need to remove the head from the engine just to do something simple as an intake manifold..that's crazy. Pulling the whole engine is just retarded. [/quote]

Quote »no, i found it, im just a F-ING idiot, but eventhough i have all the 7 bolts out, [/quote]

Maybe i've just got fatter arms than you two.:pface Because there was no way i could get to the bracket that holds it to the block, OR the bolts on the bottom of the manifold, even from under the car. I eventually got to the bracket by moving the fuel filter and getting the rathcet down there, but i had to move the head around to get to the last bolts on the runners. I didn't say it was the only way to do it, just speaking from my own clumsy experience, no need to get abrasive U12.

[U12 2NR]

not getting 'abrasive' but telling people they have to remove the engine to get to the intake manifold just discourages others who're reading this from working on their car, no one wants to think about remove the engine, now that's a nightmare! didn't mean to come off harsh.

[blue_hauder]

Just from my experience pulling the engine is easier than pulling the head off. I might not have been doing everything right though.

[revhard05]

pulling a engine out of a 240 is pretty easy and its the frisy engine i have ever pulled

[U12 2NR]

Pulling the head is easy. Valve cover->head bolts->Cam sprocket, that's pretty much it.

Pulling the intake manifold, even easier as long as you know where things are before you begin the job, like using the pics from the FSM.

[whiteonwhite240sx]

intake tube,lower intake brace,egr, vac lines,gas lines,+there are a few hoses w/ clamps under runners,intake bolts,wire harness connectors, take ur time & remember where everything goes it took me some manuel dextarity wiggeling it off the 2 head 2 intake studs, dont bogger up the studs u need them I stripped the ex. 2 head studs out of the head n had 2 tap it out and used a good old american bolt

[matt4pl]

AMS is almost done with their ka24de intake manifold and it looks sick, but no tapered plenum on it though