building a KA-T (WHAT MOTOR WILL HE CHOOSE NEXT?!)

[93 Chuki FB]

ok the guy thats selling me the shell lost the title, so im not getting it . But i decided to boost my S14 KA24DE in my DD coupe, i know i keep going back and forth but ive made up my mind. So the turbo i got is really small, its smaller then a SR T25, but it looks like it belongs on a car, its a IHI turbo and its brand new. The guy said it can make 14psi but i doubt it. The dimeter of hole that the boost comes out is like 1.5in

[WDRacing]

The SR T25 is already to small for the KA. I understand you're on a budget, but that doesn't mean you should just do any damn thing just because it's cheap. You have to do some things the right way or you WILL be making a "Blew up my KA" thread shortly after your build thread is finished. I've been Moderating this forum since 01 and have seen more then my share of projects go bad because someone rushed or cut 1 to many corners in the name of saving a few bucks.

Can you or a friend weld? Even if you can weld just a little bit, I can show you how to make an ultra cheap but still functional downpipe. That would allow you to run any manifold and turbo combo you wanted, the right size of course. Basically you'd just need to have a flange welded to about 6-7 inches of exhaust pipe. One for each end of the flex pipe. You can get flex pipe from Mcmaster Car, don't worry, I'll find the correct flanges and flex pipe for you. I've looked into this about 5000 times now because I also have a zero $$$ budget. But I do have the experience and I can weld.

Try not to buy anything until you ask us...lol. We're here to help...I've been there and done that a few times now. Trust me...I've made all the mistakes, be it putting the dizzy 180 out or simply having it a tooth off down to experimenting with electric pumps for oil return so we could avoid drilling the pan.

WD

[93 Chuki FB]

ok im not being cheap, the turbo i bought is really small and i was curious if it was gonna work. Everything im buying is what u suggested i buy and that's what im doing, i do know friends who can cut and weld that's why i didn't care about the bolt pattern on the back of the turbo.

[WDRacing]

If that's the case then you can really do almost any build. Let me look around for some options on manifolds and turbo's.

[Doya]

That was the same way I did my DP.

[WDRacing]

Did you use mild steel flex pipe or stainless?

[93 Chuki FB]

ok i kinda figured that lol, anyway is this turbo too small?? i was talking to a teacher at our school (owns a FD RX-7 and a supercharged gti) he said i shouldn't run a inter cooler and to use rubber hose for pipping and i kinda agree its the smallest turbo ive seen, i think its smaller then a CA18DET turbo, all i want is 7-8 PSI of boost, the spring in the waste gate is set at 7PSI

[PyR0NiAk]

Just some FYI since I think you're misunderstanding... 7PSI of boost from one turbo isn't the same as 7PSI from a different turbo. If that turbo is as tiny as you say it is, it seems to me that it would be extremely impractical to use on a KA24.

[93 Chuki FB]

ok so what do i have to do to get the SR 7PSI from this turbo, what would be the equivalent for this turbo? I like small turbo's, i like making full boost at low RPM, im not looking to go fast or anything i just want like 180-210whp

[ashibah83]

post the specs of said turbo, then well be able to help a little more

[Doya]

Did you use mild steel flex pipe or stainless?

Mild steel.

[PyR0NiAk]

Mild steel.

Wouldn't that be bad for corrosion??

[WDRacing]

Yeah, but the mild steal is aluminized so it's not THAT bad. It's also really cheap.

[93 Chuki FB]

i dont know the specs of the turbo, all i know is its a IHI and the series is RHF4. Here are some pics next to my I Phone box

[WDRacing]

Wow that's small...

[93 Chuki FB]

yeah, can i use it and still make 180-210whp?

[WDRacing]

No dude...that's to small. You'll have exhaust pushing back into the motor, that's called exhaust reversion and it's a bad thing.

[93 Chuki FB]

ok well its for sale if anybody wants it

[PyR0NiAk]

Like I said before, save some cash and buy a nice setup..

[Doya]

Wouldn't that be bad for corrosion??

It's not permanent. I'm going to be re-doing my dp this summer anyway. When I upgrade to a gt45

OP, that turbo is down right puny. Save up and by something decent.

[93 Chuki FB]

well my teacher said i could run it, but he said i should put a different spring in the waste gate

[Doya]

well my teacher said i could run it, but he said i should put a different spring in the waste gate

Well... your teacher told you wrong.

[93 Chuki FB]

also my friend that's super into turbo diesel trucks said it would be fine to use, im confused both sides offer reasonable arguments

[ss82480]

That turbo will be fine to use, assuming you own a lawnmower.

[biggie]

also my friend that's super into turbo diesel trucks said it would be fine to use, im confused both sides offer reasonable arguments

You apparently are talking to people who have V8s and thing a little 4cyl needs a tiny turbo. These are too small for the SR, much less the KA.

The verty smallest you should be looking for is a T25 from an SR and even that's a bit small. Smallest recommended is T28 from SR.

[WDRacing]

well my teacher said i could run it, but he said i should put a different spring in the waste gate

Inside the "wastegate" is a diaphragm. I'm not sure it can be changed out. You can change out the whole wastegate though. The external wastegates have springs inside that can be swapped out.

also my friend that's super into turbo diesel trucks said it would be fine to use, im confused both sides offer reasonable arguments

Tell your friend that a upgrade for the KA is a Holset HC1 or similar sized turbo. The turbo you have right now fits INSIDE the HC1.

Exhaust reversion is when all of the exhaust energy can't exit the combustion chamber after it's been burned. The exhaust valve opens and the piston comes back up and pushes the still expanding gases out of the head and into the header or turbo manifold. If there is to much back pressure the exhaust gas gets stuck inside the combustion chamber and remains during the intake stroke. Which is when the intake valves are open and the piston is moving down to "pull" air and fuel into the cylinder. Having exhaust gases still present will raise the temps inside the cylinder causing detonation. Detonation is basically uncontrolled ignition of the air/fuel mixture. So as the piston is coming back up during the compression stroke instead of the spark plug igniting the fuel, it ignites on it's own because of all the heat and or hot spots created by the excess heat. This means the piston is being forced down as the crank is trying to push it up. Usually resulting in broken ring lands and scratches on the cylinder walls.

I'm telling you that turbo is to small. If I'm correct the above could happen to your motor. Wanna roll the dice?

Ask your teacher and your buddy about exhaust gas reversion and back pressure. Exhaust reversion can be a problem even when the motor isn't boosted. A poor cam choice or a header with the wrong sized primaries can cause reversion to occur.

To explain it another way, using that turbo would be like plugging the end of the stock manifold by about 1/2 and then adding boost which in turn creates the need for more flow. You can't increase the amount of flow coming into a motor and decrease it's ability to move that energy OUT.

I am so against that turbo that I'll even side with an unbalanced Chinese knock off if that were the other option...and I hate those.

WD

[DMan II-40]

I'm really liking this thread, lots of good advice in here (even though OP doesn't seem to be taking all of it). Non the less, I still like the thread, good read for a low budget turbo set-up. I'll probably be making a thread like this in awhile, but currently I'm going to get a new clutch, then better brakes and suspension.

Only advce I can give is LISTEN to these guys, I have learned so much just reading these forums (some other ones too but maily this one) and it has givin' me a very good understanding of turbo charging. I feel prety confident with what I know, and I still want to learn more and have hands on experience before I start giving out information.

WD: I'm a cheap/broke a** too. What kind/brand of welder did you get to learn. I wish so bad that I had one to play with. Would open up my plans for turboing so much.

[93 Chuki FB]

im taking all the advice these guys have given me, im not gonna follow them blindly, im trying to keep all my options open. Im buying another turbo, but this turbo is gonna go on my little bros LS integra (its made for 1.3-1.8 motors). But yeah im trying to listen to everybody and because everything everybody has told me has been a contradiction of what the another person has said so im trying to find the truth in what ppl are saying. All because somebody with experience says something wont work and all the evidence they give me is "trust me i know what im talking about" then im not gonna listen, i listen to facts and real evidence not bulls***. Luckily nobody in this thread has done this. WD you have been a life saver i appreciate all the help, i will have a KA-T very soon here.

[WDRacing]

Bigger is better homie...try to think that way when looking for used turbo's. Don't go buying a T70 now...just ask real quick in here before you buy something. What's a $$$ number I can use while looking?

WD

[93 Chuki FB]

well i bought everything else i need to install the turbo and im left with $125 lol and i still need to figure out what im gonna do for the oil bung, but yeah $125-150 would be great, i know its not the greatest budget but like i said, 17 years old, no job, and im broke lol. I contacted a guy on NWN.com (that site sucks fat donkey d!ck!!!!!) he has a stock sr t25 that he trying to sell
Modified by 93 Chuki FB at 7:58 PM 3/26/2010