newbie manifold question

Post by **LEMHEAD16** » Wed Dec 10, 2003 5:54 am

I just started my KA24ET project and I have a couple of questions for all of you.

1.) I just got my JGS maniflod. Where is the best place to mount the turbo in the middle or at the back of the manifold. I know the revhard and unstable hybrids manifolds have it in the middle I was just wondering if there was any benefit to mounting it else where.

2.) Initially I will be running low boost 6-7 psi. Can I run stock injectors with this or should I upgrade to 370's and a SAFC? Can I Run stock injectors with a rising rate FPR or is it jsut dumb to bother with stock ones and spend the extra 300 on 370+afc

3.) if I do run 370's and SAFC I am assuming I still need a RRFPR. Am I right

This is my first turbo project So you will be hearing alot from me Thanks for your help

Website · Post by **daniel240** » Wed Dec 10, 2003 5:54 am

where you put the flange is up to you. it kinda depends on your setup. are you doing custom ic piping? just kinda hold it in place how you think you want it and mark it. but make sure you get it where you want it because once you weld it on it will be a ****** to change. for 6-7 psi, you could still use stock injectors and fmu but that would be on the edge. it would probably be a better idea to go ahead w/ the 370's and afc or if you dont want to spend a lot then just get the 370's and hack your mafs. that would be the simplest and cheapest way.

Post by **Jonny 290** » Wed Dec 10, 2003 5:54 am

Don't try to turbocharge your KA with stock injectors.

I strongly recommend against FMU's if you will EVER want to upgrade to more power.

now, if you wanted, you could swap out the FPR with a 1:1 4 bar FPR; that would effectively give you 360cc injectors, which you could tune with the SAFC. I wouldn't do this without a Walbro 255 or similar fuel pump, though.

And put the flange dead center in that manifold. An off-center log manifold would cause some problems, in my opinion.

EDIT: No, you will not need a RRFPR with an SAFC, assuming that everything is sized within spec.

Post by **j-z** » Wed Dec 10, 2003 5:54 am

for the placement check out the turbo manifold thread on this page. go to the bottom of the second page and follow what i posted. that should help you out some. if youre only gonna boost 6-7 psi you use a fmu setup. just make sure you get a high pressure inline fuel pump. you can find a used one for 60-70 dollars. fmus are around $75 used if your gonna boost on a tight budget. that should be more than enough for 6-7 psi. then just back your timing off a few degrees. im gonna go this route and not even mess with the hacked maf. then when i plan to run more boost im gonna run a afc and walbro intank and a z32 maf and of course bigger injectors. that will be for my 300+mark. btw how long did it take for you to get your jgs log mani?

Post by **huguetpj** » Wed Dec 10, 2003 5:54 am

Jonny 290 wrote:Don't try to turbocharge your KA with stock injectors.

Why not? I'm running 4.8PSI on a completely stock fuel system. Haven't even installed the Walbro fuel pump I have lying around (and I know I should, just haven't had the time). I even had a track day the other day, ran open pipe and the boost went up to 6.7PSI. The runs lasted about 5 min and I had 3 runs.

Of course each car is different, the theoretical limit of the 270ccs at 43.8PSI is about 3.8PSI. Don't ask why I can run 6.7 without any issues.

I'm even running stock timing. Had the timing back to see if it would help with EGT temps but nothing happened, so I went back to 20 deg.

Post by **Jonny 290** » Wed Dec 10, 2003 5:54 am

I'll spend my $75 for SR injectors and ensure that i'll have enough for 12 psi, thanks. I'm glad that you got your car to run for 15 minutes at 7 psi. It's still a really, really bad idea.

Just because you didn't detonate at that level, or even 5 psi, doesn't mean you won't.

Post by **huguetpj** » Wed Dec 10, 2003 5:54 am

Jonny 290 wrote:I'll spend my $75 for SR injectors and ensure that i'll have enough for 12 psi, thanks. I'm glad that you got your car to run for 15 minutes at 7 psi. It's still a really, really bad idea.

Just because you didn't detonate at that level, or even 5 psi, doesn't mean you won't.

Where can I get SR inj for $75? The chepeast I've seen them is $120-150

Anyway, I've been running my car at 5PSI for the last 5 months. I'm going to the dyno to check my AF ratios next week and to see how "lean" if anything I am at 7PSI. If they turn out fine, then I don't see why I should have to worry. I know it is best to have extra fuel just in case, but I'm saving up for 550s or 720s and something (haven't decided) to control them. Already had the 370, but sold them for a profit (so I could finish installing my turbo :pface )

There is also another member here at NICO who has been running on stock inj at 7PSI for quite a while now, don't remember his nick.

Is it the best way? Definitely not. Should I worry? I'll post my dyno sheets in about 2 weeks and let you know

Post by **j-z** » Wed Dec 10, 2003 5:54 am

i think that getting your a/f curve checked should have been the first thing you did. so your not even running an fmu atleast? what size compressor and trim are you running?

Post by **LEMHEAD16** » Wed Dec 10, 2003 5:54 am

back to the original subject. Thanks for the inputhere is what I am planning tell me if I am missing somthing major

JGS ManifoldT3 turbo (maybe z31/maybe ebay)370cc injectors from CA18intercooler with custom pipingtial wastegatewalbro fuel pumpSAFC

Questions:

Do I need a diffferent FPRDo I need to back my timing off? If so how farIs anybody running a turbo KA in tulsa?

Post by **Nathan** » Wed Dec 10, 2003 5:54 am

Take a look around Ebay for a T3/T04, I believe one of our members picked one up for 375 brand new:eek:. Other than that, it looks like a setup good for about 10psi. Don't forget oil lines etc. for the turbo and little random parts you'll undoubtedly need. The answer about timing depends on how much boost you want to run, you dont need a different fpr either

Website · Post by **TurboKA37** » Wed Dec 10, 2003 5:54 am

i think .5 degrees of retard for every lb. of boost is good for the timing

Post by **Jonny 290** » Wed Dec 10, 2003 5:54 am

Didn't mean to derail this.

Just dig on forums for SR injectors. Look for a few weeks and you *will* see them go up for $75. I got mine for $60 shipped from Japan. Hint: Pay attention when the high-hp SR guys blow their motors. They'll buy new clips and FS: the accessories.

Anyways, yes, .5 degrees per pound is a good figure to start with. Running 6-7 pounds, you can retard the timing at the distributor 3 degrees across the board, you should be good. Beyond that, you need to start looking into something with adjustable ignition maps.

Post by **TrunkMonkey** » Wed Dec 10, 2003 5:54 am

Jonny 290 wrote:Just dig on forums for SR injectors.

he is turbocharging a ka24e, which uses top feed injectors. the side feed SR injectors won't work.

-demetrius

Post by **Jonny 290** » Wed Dec 10, 2003 5:54 am

*smacks forehead*

shouldn't that be even easier, then? DSM injectors maybe?

I dunno, i'm sticking with sidefeeds for now, but i'll be getting 550's and a custom rail this fall.

Website · Post by **daniel240** » Wed Dec 10, 2003 5:54 am

Nathan wrote:Take a look around Ebay for a T3/T04, I believe one of our members picked one up for 375 brand new:eek:.

that was me, i got a brand new XS T3/T04e w 50 trim for 375 shipped! there's plent of good deals on ebay, i would try to buy a new one though. and buy from someone w/ high ratings.

Post by **rco8786** » Wed Dec 10, 2003 5:54 am

huguetpj wrote:Where can I get SR inj for $75? The chepeast I've seen them is $120-150

Anyway, I've been running my car at 5PSI for the last 5 months. I'm going to the dyno to check my AF ratios next week and to see how "lean" if anything I am at 7PSI. If they turn out fine, then I don't see why I should have to worry. I know it is best to have extra fuel just in case, but I'm saving up for 550s or 720s and something (haven't decided) to control them. Already had the 370, but sold them for a profit (so I could finish installing my turbo :pface )

There is also another member here at NICO who has been running on stock inj at 7PSI for quite a while now, don't remember his nick.

Is it the best way? Definitely not. Should I worry? I'll post my dyno sheets in about 2 weeks and let you know

My SR injectors were 45 shipped w/ new o-rings. you just gotta scour all the forums and you'll find some nasty deals.

Post by **rco8786** » Wed Dec 10, 2003 5:54 am

demcj wrote:he is turbocharging a ka24e, which uses top feed injectors. the side feed SR injectors won't work.

-demetrius

Top mount CA injectors will...there's usually some floating around ebay.

Post by **rco8786** » Wed Dec 10, 2003 5:54 am

LEMHEAD16 wrote:back to the original subject. Thanks for the inputhere is what I am planning tell me if I am missing somthing major

JGS ManifoldT3 turbo (maybe z31/maybe ebay)370cc injectors from CA18intercooler with custom pipingtial wastegatewalbro fuel pumpSAFC

Questions:

Do I need a diffferent FPRDo I need to back my timing off? If so how farIs anybody running a turbo KA in tulsa?

if you get one from a z31(an 90% of them on ebay) they will be internally gated...a tial will probably be overkill if it's just a street setup...just my .02

Wow I've made 3 replies in this thread..i'm done.

Post by **Jonny 290** » Wed Dec 10, 2003 5:54 am

timing can be backed down .5 degrees per pound of boost at the distributor, but i wouldn't compensate more than 3-4 degrees (6-8 lbs boost) that way. Anything above that, you need some dynamic timing control, either via maps or something like a MSD BTM.

I'm not in Tulsa, but I live in Fayetteville, just 2 hours away. email me if you wanna yap about turbo KA's.

[email protected]

newbie manifold question

newbie manifold question

Nissan Forums

Infiniti Forums

Datsun Forums

Technical Forums

Classifieds / Marketplace

Nissan Motorsports

General Forums