newbie has searched for into and i just wanna make sure i'm up to speed...

[90SXSE KA24ET DREAMS]

i have searched for idea's to make my sohc ka turbo but i just wanna make sure i'm all good and up to speed and correct with it. thanks for the help

sohc ka has less than 90k mileage on her and runs great!!!!

I wanna go turbo and keep stock internals and my list below seems pretty good for keeping it safe without blowing something but i just wanna make sure i'm up to speed on it.

here's list..

1. SR20 T-25 Turbo stock 7psi2. Injectors unknown... need some help on picking some good decent injectors that wont need much tuning and stuff.3. SSauto T2 buttom mount4. SR20 Turbo dump pipe5. SR20 down pipe6. SAFC27. Walboro8. Any Blow OFF Valve9. Turbo timer 10. Side-Mount Intercooler for now.11. 300ZX TT Fuel Filter

so i would like to run that kinda setup as of now and maybe later I might like to up the boost to 10-12 psi keeping stock internals, so would I need to upgrade any of the parts up above in the list to be able to run safe without blowing?

sorry for it sounding dumb...

thanks

[BadMojo]

I'd imagine 370cc injectors from an SR would be fine for your 7psi on the T-25. The turbo, if you look at the compressor maps, really is too small. The thing will be very inefficient. Some folks have squeezed big numbers out of it, but I'd be wary of poor turbo and engine life.

I'd skip the turbo timer (just don't shut the car down right away when you've been running it hard) and invest in some gauges (boost, water temp, oil pressure at least.

[Kenrik]

DO NOT GET THE SSAUTO.....

[90SXSE KA24ET DREAMS]

thanks BadMojo and i'm thinking this setup would give me like 200rwhp and 210rwtq??

true???

also i'm from Reading,PA as well but gonna be up in johnsontown,pa soon for school.

Do you ever go on AIM? we can talk more.

kenrik, what mainfold would you suggest???

thanks.

[veilside180sx]

Wow two posts, both have misinformation. SSauto doesn't even make an SOHC manifold. SR injectors are sidefeed, no go for launch on a top feed based fuel rail.

[veilside180sx]

"SOHC Turbo Build For Dummies" taken by my own post on ka-t.org

These are the Prerequisites to building a SOHC Turbo. Together we will go through typical setups from mild to extreme to reach the power goals you desire. These are lists of typically used items that are easily attainable by the average person. All setups should have the Air to Fuel Ratio verified on a dyno with wideband or at very least on a track using an in-car wideband setup (NO watching the standard O2 signal and calling it good). If your using pump gas and seeing air to fuel ratios more lean than 11.8:1-12:1, some rethinking on the tuning/fuel setup will be needed. A narrowband gauge(typical A/F gauge from Autometer for instance) is not complex enough to be a real indication of the ratios inside your combustion chamber.

Very Mild Build: around 180 rwhp

Turbo ManifoldBlow Off ValveTurbo (T25)Downpipe 2.5" is perfectly finePipe to connect turbo to throttle body

Fuel Control:FMU (not recommended, but doable) Raises fuel pressure per boost to make injectors flow more than normal.DSM 450cc Injectors or Comparable (These injectors are low impedence, while the ECU requires high impedence. Making it necessary to wire in resistors to alter that so the ECU can control them. These can be found at places found at the bottom)Apexi SAFC2Greddy Emanage

Mild power adder, say you want around 200 rwhp.

Turbo ManifoldBlow Off ValveSmall Intercooler (potentially get away with a side mount)Turbo T25/T28/14B, etc. Smaller T2 setups. Usually will be internally wastegated.Downpipe 2.5" is perfectly fineReplacing the Exhaust is starting to be very necessary at this stage, so I would start to shop for that as well.

Fuel ControlDSM 450cc InjectorsApexi SAFC2Greddy EmanageBack off base timing at distributor or MSD BTM

Average: 300 rwhp to 350 rwhp, you have to start to expect a little more lag. This is about the perfect "street car" limit. No race gas, just good honest street car fun that is fully capable of bring home a 12 second timeslip on a good run.

Turbo ManifoldT3/T04E .50 Trim compressor, .60 trim compressor housing / Stg 3 (aka TA31) turbine wheel, .48 to .63 A/R exhaust housing. Internal wastegate optional but not recommended. Downpipe can still be 2.5", but this is as far as I would want to push that.Front Mount Intercooler (FMIC) It's time to upgrade to a larger front mount as the larger will push more air than the smaller sidemount can cool.

Fuel Control550cc InjectorsSAFC2 to control your fuel injectors, along with the stock ecu.MSD BTM At this stage I would be running the BTM to control timing retard.Reflashed ECU-This can be a DIY thing with Eprom Tuning or a JWT. This is the largest JWT is capable of flashing for those that want it.Z32 Maf is required, as the stock Maf stops being able to read at around 260 rwhp.Wideband O2 Sensor should be installed for tuning.

Block InternalsThis is where I would start to consider it necessary to replace you pistons.

Above Average: 350 rwhp to 425 rwhp

Turbo ManifoldBlow Off ValveT3/T04E 50 Trim .48/.63 or slightly larger turbo, this is where I would start to make the switch up to an external wastegate. You have the option to reroute it back into the exhaust, or merely "dump" it out into the open. "Dump" is usually a mini exhaust in the form of 1.5" piping routed out to the open.FMIC Larger is starting to be necessary. Typical for setups from here on, are 12"x24"x3" for the core.Downpipe 3", at this point I would switch to the larger downpipe. You can probably get away with it at 2.5", but it will be causing a little bit of backpressure. Moving to 3" piping as quickly as possible is what you want though. Usually it is necessary to have the first bend 2.5" to clear the steering shaft though.Exhaust 3"

Block InternalsAt this stage you'll want to "build" or fortify your block to better handle boost. Previous to this you can walk the line, but here and forward I find it necessary to do so.Forged RodsForged PistonsStock CrankPlus your typical rebuild items.

Fuel ControlStandalone fuel management is recommended at this stage in the game and is absolutely necessary at the next. These allow you control not only very large injectors, but the tuner to have complete control over both timing and fuel.720cc Injectors. Wideband O2 Sensor is necessary for tuning.

Wild Build: 425 rwhp to 600 rwhp. Lag is obviously going to be much more apparent, full boost isn't going to happen until around 4000-5000 rpms or so. Once spooled it will pull very hard.

Turbo ManifoldTurbo T3/T61/SC61 or GT35R seem to be the typical turbo's in the area. External Wastegate is your only option that should be considered.Blow Off Valve You'll want a good performing more expensive blow off valve to alleviate reverted air when the throttle body closes from pushing against the compressor wheel.FMIC the 24"x12"x3" Core's are still effective in this range.Downpipe 3" is still capable of handling these power levelsExhaust 3" or larger

Fuel Control720cc-1600cc InjectorsStandalone Fuel ManagementRecommeded to switch to Map instead of Maf for reading airflow.Wideband 02 Sensor installed and wired into standalone for adjustments and monitoring.Dyno tuning is very valuable.

Block InternalsAlong with the previously mentioned internals I would add these to the listCam (per your discretion)Build your head as wellSolid Lifter Conversion (not required, but not a bad idea)Valve SpringsValve RetainersARP Head/Main StudsCometic Headgasket or similar

Absolute turbo necessities...amongst the aforementioned goodies above.

Oil Lines (Picture of good return location)

Boost gauge

Here's lists of aftermarket products that are currently on the market

Turbo Build Parts

Turbo Manifold (Exhaust Manifold)

JGS Precision



Realnissan.com

Import-AutoPerformance.com



Nizzx.com



BOV

TialGreddy RSJGSHKS SSQV

Wastegates

Tial



JGS



Turbonetics

Block Internals

Pistons: Can be accomplished one of two ways, by purchasing ones that are made for the E with their intended compression ratio. The other is to use DE pistons and subtract a full compression point to equal the difference between the E and DE head. (ie 9:1 DE pistons will be 8:1 in an E)

Arias 8.8:1(E)Wiseco 9:1(DE) 8:1(E)JERoss 8.5:1(E)CP 9:1(DE) 8:1(E)

Rods: Any rod that will fit the bottom end of the DE will work with E as well.

CrowerPauterCarilloEagle (release tbd)

Bearings

Whatever your preference is for rebuilds. Mine is Clevite.

Headgasket

SCE gaskets

Valves

SI valves

Cams

PDM RacingNissan MotorsportsColt CamsHybridka.comJWT Technology

Solid Lifter Conversion Kit

Hybridka.com

Typical Injectors Used on SOHC

DSM (Eclipse/Talon/Laser) 450cc Injectors *Low Impedence*

RX-7 T2 550cc Injectors *High Impedence* Denso 195500-2020

RX-7 N/A 460cc Injectors *High Impedence*

CA18DET 370cc Injectors *Low Impedence*

Injector Resistors (To alter low impedence to work with a high impedence ecu)

JWT TechnologyJGS Precision

[90SXSE KA24ET DREAMS]

wow..thanks!

then my guess is i need to re-look a few things and come up with a better parts that would actually work for what my goals are.

For now i'm thinking i'm gonna go with the DSM 450cc or the ca18det injectors.

and sorry but now i really need an answer to this next question becasue i'm real new at this turboing the ka.

okay here goes... the list of injectors used on sohc, what does low impedence and high impedence mean??? if i get low impedence like say i'll probably get the DSM 450cc's but it says low impedence, and then the note below says.... Injector reistors ( to alter low impedence to work with a high impedence ecu)

Im soooo lost on that??? what it mean??/ does it mean if i get dsm injectors do i need to send out my ecu to have it programmed???

and sorry again.

[veilside180sx]

resistor

n : an electrical device that resists the flow of electrical current [syn: resistance

You'll just have buy some resistors to place in line between the ecu and the injector.

Some like this...they are the shiny gold anodized deals.

http://www.jgstools.com/turbo/index3.html

[90SXSE KA24ET DREAMS]

oh alrighty thanks. i'm getting it now.

so if i go with dsm injectors or ca18 370cc's i wold need to buy those resistor which they are a cheap price. yay. : )

and how would i go about wiring them up???

thanks again.

[veilside180sx]

You have to cut the wire that goes between the injector and the ecu, and solder them into place. If you don't feel comfortable doing that, probably wouldn't cost much to have a shop do it.

[90SXSE KA24ET DREAMS]

okay i understand..

1 more.. Is there anyway to leave the injectors stock but upgrade fuel pump to walboro and filter to a 300zx and run low boost on stock injectors and getting away with it?

thanks

[90SXSE KA24ET DREAMS]

also i'm trying to find a picture of where acutally the resistors go and just to see where i know they go to and are mounted too.

have any pictures?

[BadMojo]

Wow two posts, both have misinformation. SSauto doesn't even make an SOHC manifold. SR injectors are sidefeed, no go for launch on a top feed based fuel rail.

Sorry about that. I didn't even notice that he said it was a KA24E. I guess I should stop posting after midnight.

[veilside180sx]

No worries, I'm just trying to keep people steered straight on the path.

[Florida240sx]

He could get a fmu but only if you are going to run low boost.anythuign over 7lbs you should increase injector size so they aren't maxing out.

[90SXSE KA24ET DREAMS]

He could get a fmu but only if you are going to run low boost.anythuign over 7lbs you should increase injector size so they aren't maxing out.

okay thanks... Then i will probably look into to running 6psi then and then after a few 1 month or two i'll upgrade injectors and up the boost some.

what kinda power and torque would i be getting from 6psi?

my power goals are to at least to make 220rwhp and 225-230rwtq. But as of now I wanna start small and try to get to 200-210rwhp and get used to that first.

thanks again for the idea's and help.

[DammitBobby]

This needs to be a sticky!

[90SXSE KA24ET DREAMS]

This needs to be a sticky!

hehe yeah cool it should be sticky. so others like me can read it over and over again.