need serious fuel help

Information on the naturally-aspirated KA24E and KA24DE engines.
diceman_6
Posts: 8
Joined: Sun Jan 12, 2003 9:12 pm

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I am having serious problems trying to figure out the fuel system for a turbo ka for a twin cam. I have everything else taken care of. I am confused about a few things:

1. I see alot of people with 370cc injectors...where do I get them , I saw sr20......are they side feed, will they work with the stock ka fuel rail, and what regulator do I need.

2. Msd 50lbs injectors....I saw on the summit racing site that they are top feed, what fuel rail do I use and what regulator

oh and non related question....does anyone know or think a volvo 740 turbo manifold will work if the flange was cut off and a ka flange welded on? as in do the primary tubes have the same or close spacing as the ka head?

any info would be greatly appreciated, I am die hard on this turbo project because I got beat by a 99 saturn sc1 tonight and I am none to happy about that:oface thanks to all

oh I sorry if this has been discussed before I just joined, tried searching for it but came up empty


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matt0941
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SR injectors are side, KA are top-feed.

EDIT: LOL, I had it backwards.

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huguetpj
Posts: 996
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Car: 93 KAT Coupe

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dice, the question has been asked before but anyway...

KA24DE - side fed 270cc injectorsSR20DET (S13,S14) - side fed 370cc injectorsSR20DET (S15) - side fed 480cc injectors94+,95,96 300zx - side fed 370cc injectors

All of them are supposed to be interchangeable.

KA24E - top fed 270cc (?) injectorsCA18DET - top fed 370cc injectors

Both of them supposed to be interchangeable.

That's all the info I've found so far. Also I was told by phase2 that they have drop in 550cc and 720cc injectors for the KA24DE but I wouldn't trust the stock fuel rail with that much fuel.

Anyone know how much fuel the stock fuel rail can flow?

diceman_6
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Joined: Sun Jan 12, 2003 9:12 pm

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Ok sounds good.....can a sr fuel rail and reulator work on the kaand does anybody know where I can get 370cc injectors cheap.....I am trying to do this turbo setup for 1500 or less.

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matt0941
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Hmmmm, are you sure you have the knowledge (not trying to insult you, because even I don't) and handiness to make a custom turbo setup? Because you don't get any help from the companies and if anything goes wrong it will be you that knows the most about it, not a shop. What kind of turbo are you going for, out of a junkyard?

diceman_6
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Yeah I know what I am doing with the set up I have spent alot of time researching and my buddies have all done turbo setups on various cars.......I am probolby going to use either a dsm turbo ( even though it is a little small for the 2.4 but it will spool fast and give me power at a lower rpm...which is good for stop light to stoplight racing.

or a saab turbo....same issue

or a nissan 300zx turbo...still have to look more into that

or I just found that volvo had a turbo 740 and that motor is a 2.3 I beleive so I need to reasearch that more

junkyard turbos are a good bargin as long as they have not been to exposed and the shaft has little play most cars are not in the junkyard cause their turbo died...granted sum are hehe my friend did a del sol turbo set up using a saab 9000 turbo and he has had better luck with that than the brand new green turbo on his eclipse which he blew a exhaust side gasket at only 15 lbs.

Anyway I am doing this set up 1. to see if I can do it on a budget 2. just so I can have extra power untill I graduate college, then it will be on to either a fully build ka or an sr...undecided on that

Turbo 510
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The 94-96 Twin Turbo injectors are 370cc, the non turbo are 270cc. For a turbo applications, the 370cc injectors are the ones to use up to about 275 HP(with a host of other upgrades). Beyond that, a custom fuel rail must be fabricated to work with the MSD injectors or NISMO has the very expensive 555cc injectors that are side (galley) feed and drop into the stock fuel rail. The stock fuel rail will flow enough to feed them. At this level of power, the list of modifications grows longer. A MAF from an early 90's Mustang Cobra MT must be used due to the inability of the stock MAF to recognize airflow above 5 volts. Of couse, the stock computer must be reprogramed to work with all of these changes. In addition to the above, the standard mechanical mods must also be done. It is expensive, but worth it. "You can't put a price on a good time."

diceman_6
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Joined: Sun Jan 12, 2003 9:12 pm

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thanks for the info 510... I am not going to go crazy with this set up yet...as in no internal mods. stock maf, and a piggy back system...s-afc, I only want about 6 to 8 lbs of boost and 200 to 240 hp But that info is good to know if I decide to do the full built ka

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cnichols
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diceman_6 wrote:Ok sounds good.....can a sr fuel rail and reulator work on the kaand does anybody know where I can get 370cc injectors cheap.....I am trying to do this turbo setup for 1500 or less.


I've got a set off an SR20...$150 shipped.

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cnichols
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I've got a question...any way the HKS SR fuel rail will fit the KA. I know it probably won't but damn, it's PRETTY! and it will match my HKS pillowball mounts

Turbo 510
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I got my 370cc injectors from a parts wanted ad via the internet. 6 of them for $200. Sounds kinda steep but wholesale on new ones was about $100 each. I had them cleaned a flow tested for $80 because you never know what you're getting. Your setup sounds cool. beware of the stock KADE pistons as they are prone the falure (broken ring lands) at moderate horepower levels (the ones you are looking to get). Forged pistons at about $500 a set may be $$$, but they are designed for boost and the associated heat not to mention the piece of mind.

S13Ka24e
Posts: 241
Joined: Mon Nov 04, 2002 11:26 am
Car: Tunning, reading, learning

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Ok so lets assume that you want to spend $1500 max.

Manifold (check out http://www.jgstools.com/turbo/ ) $300.turbo z31 300zx $200HKS S-AFR $350Injectors 370cc $150Intercooler junkyard $200BOV (1g DSM) $30Boost controler $50Oil Lines $40vaccum lines/misc lines $30Down pipe/intercooler pipes $50Turbo timer $100

There you go all for $1500 or less depending on what kind of deals you can get.

S13Ka24e
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I just noticed that I didn't have guages up there, I would think you would need atleast a boost gauge, probably a A/F and EGT. probably another $200 for a cheap set.

diceman_6
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Joined: Sun Jan 12, 2003 9:12 pm

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I've got a set off an SR20...$150 shipped.

That works...where did you get them?

and s13ka thanks for the list.....here jis how mine breaks down so far

Manifild 150( I am pretty sure I can use a volvo 740 mani and weld on the ka flange....somebody should really look into that to sell....hint hintboost controller haveintercooler 150gauges 150ic pipes 50fuel pump 100s-afc 285(ebay is sellin them for that because I think they came out with a better oneoil lines and fittings 50turbo 150 - 200downpipe free to very cheap...can make it myselfbov 150injectors I'll say 200 to be safemisc lines 50no turbo timer yet=1535 this is useing the max prices on the list so hopefully I will get a break here and there

and turbo 510 do you have a 6 or a 4 motor want to sell those 2 extra you have

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cnichols
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Bought them off a guy who was upgrading his newly imported SR20DET. He took them off as soon as the motor arrived and sold them to me. I decided to go to 50 lb. injectors, so I never used them either.

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WAbernethy
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Joined: Wed Aug 28, 2002 11:13 am

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I used to have a Volvo 760 turbo and I think the turbo was on the pass side of the car. Not sure but I think the tubes will be set up backwards. I'm having the same problem with my turbo. The outlet side is set for the right side of the car. When the oil drain on the turbo is down, the outlet elbow pionts up. Knida sucks but I'll fix that right up with the blowtorch and welder. I hope. It's off a late 80's Supra. Should be plenty big enough for the KA.

diceman_6
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Joined: Sun Jan 12, 2003 9:12 pm

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yeah the turo is on the right side of the car but I think there is enough clearence to mount it on the ka. and there is a website that sells ka flanges so I was thinking of cutting off the volvo flanges and welding on the ka flange or making a flange that you bolt the volvo turbo on to and then bolt that to the ka head but I have to get a manifold and play which I almost had but this guy and ebay would not take a money order for the manifold....he would only take paypal which I don't have an a account....so that sucked. For your oil drain....couldn't you have the oil go in the outlet and exit through the inlet....I don't think it matters which is which?

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WAbernethy
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It does matter which one goes where. On my turbo, there is a smaller line for the oil inlet and a large one for the outlet. According to Corky Bell, this design is important to the flow of the oil through your turbo. The high pressure oil comes in the small line and needs to have very little resistance going out. It will cause problems with oil seeping into areas of the turbo that it's not supposed to be. You can usually rotate the center cartridge part of the turbo to suit your needs. It may take a little work to do it but would be worth it in the end. Check out this site www.iboost.org . I got my manifold from them for $140 bucks. It comes unwelded but has the flanges for the motor and any turbo that you want. He had to custom make mine since he didn't have any for the CT 26 that I am using. He says he'll make a manifold for any car as long as you'll send him a exhaust manifold gasket or the $ to buy one so that he can use it to set up his mill.

diceman_6
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Joined: Sun Jan 12, 2003 9:12 pm

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Thanks for correcting me.....hmmmmm info is good.....thanks for the manifold hook up I haven't heard of that site yet I will have to check it out

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Movingviolation240
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'93 Lexus SC300 w/ SP66 turbo kit

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There was a set of 370's on Ebay last week that sold for $56

PaulOrlando, FL

S14Zilvia
Posts: 300
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What size injectors came in the 92 300zx TT?

I've got some, and they're side feed, but I'm not sure that they're 370cc. 320 maybe?

diceman_6
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Joined: Sun Jan 12, 2003 9:12 pm

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I am curious too....someone said 94+ are 370cc and work with the ka but I am not sure about the 92 if you can find out if they will work I will be more than happy to buy them

ziggy682
Posts: 260
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Car: 1991 240SX Turbo

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diceman_6 wrote:I am curious too....someone said 94+ are 370cc and work with the ka but I am not sure about the 92 if you can find out if they will work I will be more than happy to buy them


I don't think they will work, but I'm not sure why. Check this out.

http://www.jimwolftechnology.com/techadvice.html

Anything from the right half of the injector guide box will work on 91-96 KA's(I think). The only ones you should bother with are 95-96 300 ZX Turbo (370cc) injectors, 94+ Q45 (370cc) injectors, or SR20DET (370 or 440 cc) injectors. Even though other injectors will bolt it, they will only flow pretty much what our stock injectors flow.


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