Internals

Post by **mulletmrt** » Wed Mar 05, 2003 1:20 pm

Alright I fianlly got some funds for my KA24E-turbo project. I need to upgrade the internals. I got a few qustions but first some specs to let understand. z31 turbo boost want be 7psi no more than 12psi What should I use for pistons,rings and gasket? Pistons-stock,billet,or aluminum? (Kinda price concerned) Rings- stock,or any other performances ones? Gasket-stock,steel, or just O ring it? Now I'm only planning to boost it to 12psi max (thats for track times) So should I just leave compression the same on buy deep dish and up it? Sorry if this is a lot of questions but I'm in a jam. Thanks for any comments. Mike

Post by **oi138** » Wed Mar 05, 2003 1:20 pm

mulletmrt wrote:Alright I fianlly got some funds for my KA24E-turbo project. I need to upgrade the internals. I got a few qustions but first some specs to let understand. z31 turbo boost want be 7psi no more than 12psi What should I use for pistons,rings and gasket? Pistons-stock,billet,or aluminum? (Kinda price concerned) Rings- stock,or any other performances ones? Gasket-stock,steel, or just O ring it? Now I'm only planning to boost it to 12psi max (thats for track times) So should I just leave compression the same on buy deep dish and up it? Sorry if this is a lot of questions but I'm in a jam. Thanks for any comments. Mike

for 12 psi on a t3 stock pistons should be fine, but if you don't feel comfortable use forged (STOCK OR LOWER CR).

as a matter of fact the whole stock bottom end should hold that just fine as long as the tuning is right.

Don't up the c/r unless you want to run race gas all the time.

James Poe

Post by **mulletmrt** » Wed Mar 05, 2003 1:20 pm

thanks thats cool. But what about my gasket and rings? Should I o-ring it?

Post by **S14Zilvia** » Wed Mar 05, 2003 1:20 pm

If I were you I'd look into a better turbo. Why go through all that work for a t3 that is not really matched to your motor?

For 7-12 psi you should be around t04 range.

Post by **hannibal** » Wed Mar 05, 2003 1:20 pm

The stock head gasket should be fine up to 12 psi, right guys? There is no reason to O-ring the block until youre pushing 25-30 psi or so. As for pistons and rings, your stock parts should work just fine (assuming theyre in good shape). I dont think its necessary to do pistons, rings, and metal gasket (or O-ring) now, but if you want to (or have to) open the engine, then go for it.And you should probably check out the T4 like S14zilvia said...

Jay

Post by **mulletmrt** » Wed Mar 05, 2003 1:20 pm

The only thing going against the T04 idea is that I already have a rebuilt z31 that I got done at a semi shop. If I didn't already have it that would seem the way to go. Thanks for the info. So should I just buy new stock pistons, rings and gasket? I'm only going to boost up to 12psi, what about the durability of the stock peices. Would they hold up for long? Thanks agian for all your help Mike

Post by **S13Ka24e** » Wed Mar 05, 2003 1:20 pm

Personally if I were to do it, I would go to JE (or any piston maker) and have then me a set of 8.5 CR pistons, re-shotpeed your rods, leave stock head gasket (you might want to buy a new one, but use the stock one). And I would feel that engine would last for very long. But for what you seem to want I would say give a call over to realnissan http://www.realnissan.com and buy there stock CR forged pistons. I think they are $580. The get your rods re-shotpeed. probably $20-25 per rod so $80-100. And then if your car has over 75k buy a new stock head gasket. That should be it for a car that would last very long at 12psi. But i don't like to push the limit of anything, thats just me.

Post by **S14Zilvia** » Wed Mar 05, 2003 1:20 pm

Along with shotpeening again you'll also want to have the block honed.

Have you considered any head work while you've got the motor all torn apart?

Not sure how many miles are on this motor, but you might want to make sure the head is in good shape before bolting it back onto your $2000 rebuilt motor. It would be a shame to spend all that time and money to find that you have a leaky valve the first time you run it.

Post by **mulletmrt** » Wed Mar 05, 2003 1:20 pm

Yeah I'm getting my head a port and polish, and plan on changing any leaky or bad valves. Also I checked out courtesyparts and saw that they have KA24E pistons and ring sets. I can get them in 89.5mm/3.52 or 90mm/3.54. Which would be better for the boost? Could I shotpeed these and be good to go? heres the link http://www.courtesyparts.com/nismo/s13/s13_1.html Thanks for all your help Mike

Post by **d240t2** » Wed Mar 05, 2003 1:20 pm

The OE connecting rods are forged and shotpeened...so getting someone else to shotpeen again would be a waste of money.

Dennis

Post by **S13Ka24e** » Wed Mar 05, 2003 1:20 pm

Yes the stock rods are forged and shotpeened but doing it again wouldn't be a waste, considering the rods are 14 years old.

Post by **d240t2** » Wed Mar 05, 2003 1:20 pm

But the last poster was looking at getting new ones and reshotpeening!

And I do think it would be a waste to reshotpeen stock rods. That is an opinion oriented matter, though, so there is no right and wrong answer.

Dennis

Post by **WDRacing** » Wed Mar 05, 2003 1:20 pm

Back to the topic, if your only running 12 psi, I'd do a compression test on the motor. If its good, then make sure you have a decent fuel system and your stock block will be just fine.

If you do rebuild your motor, you might as well buy new forged rods/pistons. The stock head gasket will work fine.

WD

Post by **S13Ka24e** » Wed Mar 05, 2003 1:20 pm

d240t2 wrote:But the last poster was looking at getting new ones and reshotpeening!

And I do think it would be a waste to reshotpeen stock rods. That is an opinion oriented matter, though, so there is no right and wrong answer.

Dennis

Sorry didn't realize he was talking about getting new ones and getting them reshotpeened. That would be a waste of money.

Post by **mulletmrt** » Wed Mar 05, 2003 1:20 pm

Alright I think I got a setup in mind. Tell me if this is okay.

:New Stock Pistons- from Courtesyparts.com :New Stock Ring Set- from Courtesyparts.com :Old stock Rods- shotpeened at machine shop :New stock head gasket- from ? :Head- port and polshed at local shop checked for leaky valves,etc. :320cc injectors :z32tt fuel pump :JWT reprogrammed ecu :new timing chain :new oil pump Do you think thats alright for a rebuild/prep for turbo application?

Post by **S13Ka24e** » Wed Mar 05, 2003 1:20 pm

320cc injectors will not be good for 12 psi. You will need 370cc for about 9-11psi so if you are set on 12 psi you need to get 525cc or 50lbs injectors. Since you are getting a retune at JWT it won't be any harder to use 370cc or 525cc.

Post by **mulletmrt** » Wed Mar 05, 2003 1:20 pm

cool, Would you know any good paces to get the injectors from?

Post by **S13Ka24e** » Wed Mar 05, 2003 1:20 pm

If you want new injectors there is not better place than RC (http://www.rceng.com/) IMO. They could get you new 370cc. If you don't mind used the get a set from a Ca18det they will drop into the fuel rail of the ka24e. If you want to go 50lbs then I suggest getting a new fuel rail too so I would to http://unstable-hybrids.com/UHProducts.htm for a new rail and 50lbs. You are getting a new fuel pump and FPR too?

Post by **mulletmrt** » Wed Mar 05, 2003 1:20 pm

Yep I have a z32tt fuel pump, and I'm still think of what pressure regulator. Thanks for the info.

Internals

Internals

Re: Internals

sweet

alright

Nissan Forums

Infiniti Forums

Datsun Forums

Technical Forums

Classifieds / Marketplace

Nissan Motorsports

General Forums