Turbo setup help

ONLY for ADVANCED technical discussion about the 240sx!
xKnownShadowX
Posts: 272
Joined: Wed Aug 12, 2009 11:22 am
Car: 94 Q45a
Location: Bay Area, CA

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My car has 174k miles but the engine has less since previous owner swapped the engine 3 times and had a SR before the SOHC it has now.I dunno if it's the original but might be different.

Anyways so I picked up a used turbo kit and this all that it came with:-RC PL9-550 Injectors -RX7 red top injectors (dunno what ones)-3in Down pipe-Log manifold -Turbonetics T3/T4 Turbine (might need a service)-OEM KA24E w/ Jim Tune (said by seller and I opened it up but don't know what to look for. )-Turbo boost gauge-Piping (some is plastic=Fail)-Blitz BOV-Oil fittings-Techometer-side mount intercooler-Welbaro fuel pump still new

So far what I need:-Sell T3/T4 -Get a T28 possibly-Sell Manifold log-Buy lower mount manifold-Get oil pan tapped -Get new piping-Keep researching

So tell me any suggestions?I'm planning on rebuilding engine or just risking the one I gots. All I need is some suggestions and other things I maybe needing.

I also possibly forgot to list a few things so I'll update once I remember.Well thanks for the help I get.

p.s.I don't want an SR everybody has one thanks for suggesting.I don't need a RB cause I'l get one later down the road. I got a budget son and school to pay off.


xKnownShadowX
Posts: 272
Joined: Wed Aug 12, 2009 11:22 am
Car: 94 Q45a
Location: Bay Area, CA

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Anybody able to help?

240dx
Posts: 344
Joined: Thu Jan 29, 2009 10:35 am
Car: '97 Nissan 240SX LE

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hey man.First off figure the amount of power you would like to push through your engine. What are your goals. If you plan on rebuilding your engine then why go t28? t28 is fairly small and a built engine could handle more power then that.What is the current condition of your engine? (do a compression test) if numbers are around 165 then you do not need to rebuild your engine.......yet ( providing you are on a school budget )

Your set up seems pretty legit. The Jim Wolf tunes is one of the best out there. But if you change the set up it was tuned for then you will need to send the ecu to jim wolf and get it re tuned to the new set up which cost maybe 100$.

If the log manifold in anything other then an ebay crack shack KEEP IT.They are stronger and provide more clearence to the BMC then an average tubular. Top mounts are WAYY easier to work on, And if you sell the manifold chances are you will need a new downpipe.

Keep the t3 and rebuild it. DIY for 50$ replace the seals and bearings.the t3/t4 is said to be the most efficient for our engines.If and when you rebuild your engine you can always turn up the boost If yor switch to a t28 you will need a new tune and downpipe and possible a manifold in exchange for less power mostly at the top end

Get new Intercooler piping. If you plan on pushing more then 250hp get a front mount, or better, get a water/air intercooler. They are very small and easy to work with and very efficient. I bought bulk piping at different angles off ebay and hacksaw'd them to fit my specific set up, easier and cheaper then fab work.

Blitz makes my favorite BOV. Keep itBesides that.

Get an oil pressure gauge and A wideband o2 sensor to keep an eye on thingsIf you cannot afford the widebandand a/f gauge will work but they are not nearly as accurate.

Get a steel fitting welded into your oilpan in addition to the tap.The oilpan does not have enough meat to bite into with threads.If you cannot weld it find somebody or JB weld it it.Make sure the drain bung is as high as possible on the pan to provide a good flow.

Cheers


xKnownShadowX
Posts: 272
Joined: Wed Aug 12, 2009 11:22 am
Car: 94 Q45a
Location: Bay Area, CA

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You realize I got a SOHC?Just curious.My goal of power would be 250HP-300HP at the flywheel/crank.

I guess I will rebuild it might as well, but quick question what injectors should I use out of the ones I have?

I will do a compression test hopefully tomorrow and check it out.I don't want to rebuild my engine but one later down the road since they run cheap or might save up for a rb.Well anything else I should know?

Thanks for replying bro I appreciate it very much.

I just hope the ECU really is tuned anyway to find out if it is?
Modified by xKnownShadowX at 2:16 PM 9/18/2009

240dx
Posts: 344
Joined: Thu Jan 29, 2009 10:35 am
Car: '97 Nissan 240SX LE

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Are both sets of injectors top feed?Im not sure on the single cam if nissan used top or side feed.

RC's are very nice injectorsId choose them over the Rx's

Providing they fit your fuel rail.

Having a single cam doesnt change the facts.Besides that.Reseach and happy boosting.

unscrew the ecu cover and take a look inside and see if anything looks aftermarkett. maybe a logo, extra circuit board ect..

xKnownShadowX
Posts: 272
Joined: Wed Aug 12, 2009 11:22 am
Car: 94 Q45a
Location: Bay Area, CA

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Oh I see.If I'm correct it's top feed.I did take the ECU apart and there was like a blue thing holding a branded chip that cost like $9.Might that be it?Basically if my compression is right I can slap it on right?

240dx
Posts: 344
Joined: Thu Jan 29, 2009 10:35 am
Car: '97 Nissan 240SX LE

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do you know the guy you bought it from personally?If you dont trust the ecu, call Jim wolf technologies and as them some questions, maybe a serial number?

if your compression checks out And if the tune check out.

then basically you are able to bolt it all right up.but take your time and dont rush it.get quality gaskets. TRUST ME spend the extra buck on the steel gaskets.make sure there are no exhaust leaks.run 7-8 psi to start.

User avatar
ZakinaS13
Posts: 47
Joined: Fri Jun 19, 2009 5:56 pm
Car: 90 S13 w/ 98KADE

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Like 240dx said, Metal headgasket! Keep the T3/T4 since that and T28 are both smaller turbos, good for low end torque. If your compression check looks good, go for it! If you have to rebuild your turbo, take it to a pro and have it balanced.If not, your rebuild will be uselss (so will your turbo). Your engine has forged rods Once you get it on and running, you should break your engine in to the new boost, once you have put 1k or so miles on it, see what 10 does. With a stock SOHC, I would stay at between 12-14lbs. AND if you change injectors, you will still get the same amount of fuel pulse unless you get your ECU tuned. If your running conventional oil, change to 1/2 and 1/2 for a couple oil changes. Then go full synthetic and stay that way. You'll make your turbo much happier!

xKnownShadowX
Posts: 272
Joined: Wed Aug 12, 2009 11:22 am
Car: 94 Q45a
Location: Bay Area, CA

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Today nobody was trying to help me to compression test. My mom helped me do cylinder #3 and #4 they both rated around 150psi but one was one notch over and the other one notch below.I still gotta do #1 and #2 but first gotta find out why my car keeps overheating.Is the compression okay to turbo for like 7lbs?

xKnownShadowX
Posts: 272
Joined: Wed Aug 12, 2009 11:22 am
Car: 94 Q45a
Location: Bay Area, CA

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anybody?


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