KA-T GT35 Build.. cont..

[240sxvaj]

Stock KA FPR does rise in pressure as boost rises.... It has a diaphragm in it that reacts to vacuum and boost.

BUT...

It is not consistent. I ran my stock FPR for a while with 370's at 12psi with no issues. Not to say it's the right thing to do, but it worked. Ran over 72psi of fuel pressure at 10-12psi of boost.

I would say a stock FPR, is somewhere between having a 1:1 Rising Rate FPR, and a 8:1 FMU. It's all over the place in boost... Not consistent.

That said, it's still not the right thing to do. I've lived and learned along the way to having what I have now. Take this information and do what you will. This is personal experience.

Drop 75-150 bucks on a name brand RR-FPR. You wont regret it. I don't recall if you built your motor, but it's worth the security regardless.

i'm just curious, is the nismo fpr a good fpr? havent had problem w/ it but just want to make sure that it's a good rr fpr since i know that it's 1:1 ratio.

[Nicks97SX]

Great thread, awesome setup... Makes me wish I wasn't jobless at the moment.

[lrb_2000]

Thanks!

The car is running great. 3000 miles on the built motor, and i'm driving it daily. 850cc injectors, and i'm still getting 25mpg in town... I love this thing. It's too fast for it's own good. I never get into boost in town, if I do, i'm risk a speeding ticket. 4000rpms in 2nd gear is like 40mph, and that hits in a second haha.

I got a megan fuel pressure regulator on it now. Seemed to help out a lot. No more leaning in boost like it used to. The stock FPR was crap. 15psi, and I get a solid 11.8 on my wideband. I still need to get an EGT gauge though, see if I can lean her out a little.

[Nicks97SX]

Have you been able to see a dyno yet then?

I'm kinda curious about what kinda numbers you're seeing.

[mig_L05]

how much money did u spend rebuilding your engine? i am seriously considering your setup you have right now, its freakin awsome. the KA is so underrated

[lrb_2000]

Hmm.. Probably around 2k for the engine..

$250 Supertech .5mm over 9:1 pistons + full seal rings (from a friend)

$400 K1 rods from AMS

$500 95' KA p&p head, valve job, rebuild with 91' cams (NICO member)

$500 Full felpro engine gasket kit, ARP main and head studs, all oem nissan timing chain components, felpro headgasket, main/rod bearings, etc.. (NICO member)

$380 for machine work (block hottanked, new freeze plugs, decked, bored over, hone, crank polished, clearances checked, balanced rotating assembly, and rods/pistons weight matched within .1g)

$70 oem oil pump$45 oem water pump

So overall probably a little over $2000 for the engine build after all was done.. That's not including the $450 ACT clutch.. and a bought a spare 92' kade for $300, I used that block with the '95 kade head.

The whole build was probably close to 7k, or more I would guess.. and my car still looks like ****, but it sure does hall ***.

Also,I'm just over 3,000 miles now. Engine still runs great. My emance tune hasn't been giving me any trouble. My car just takes forever to warm up. I don't have either fan on, and it takes almost 20 minutes of driving around for it to reach 180*... if I go down a hill for a minute or two it drops down to about 150* or less.. I guess the innercooler is doing it's job, but it sucks in the winter.

[Ken Park]

I always heard that the stock DE fpr was 1:1 and was sufficient. I run 12 psi and have had no issues. I have a Weapon R regulator laying around. Should I install it, go with a better regulator, or leave my stock one in place? Is there a noticeable difference in any way between the stock unit and an aftermarket 1:1 adjustable one?

[lrb_2000]

I have no clue... I could run 12psi just fine.. but once I started going up to 15-18psi the fuel pressure wouldn't keep up, and it would run lean.. until I got an adjustable one and set the base pressure at 45psi... my stock FPR was messed up or something, it was random when it would go lean, I could just be driving and all the sudden my AFR would go from 15.5 cruising to 12.5 without doing anything.

[chad b.]

I always heard that the stock DE fpr was 1:1 and was sufficient. I run 12 psi and have had no issues. I have a Weapon R regulator laying around. Should I install it, go with a better regulator, or leave my stock one in place? Is there a noticeable difference in any way between the stock unit and an aftermarket 1:1 adjustable one?

I can't see why anyone would build a turbo setup, do a fuel system, tune, etc., and leave the stock fpr on there. Most stock fpr's are garbage, and I wouldn't trust a Weapon R either, as most of their stuff is cheap junk. An Aeromotive is the only way to go IMO.

here you go right here: http://www.slowboyracing.com/s...age=3

[turbonola]

your build sounds sorta like mine except you got rods and a big a$$ turbo.

supertech 8.6 to 1 comp .20over $400main and rod bearings $77fel-pro head and intake mani gaskets $65copper exhaust mani gasket $12misc turbo metal gaskets $30cxracing t2 exhaust manifold $100gti-r t28 $350rps street max clutch $400full turboback exhaust $free with my other 240sxi/c $50cxracing i/c piping $80660cc injectors $200 (i got a hookup)ebay bov $41machine work on block $80 (i know people)other misc. stuff add $300

$2175

running low 13's high 12's PRICLESSSlol

[lrb_2000]

only thing I see similar is the same brand pistons.

[daconkiftador]

^LOL.

Good to hear your engines running strong!

[lrb_2000]

word up.

i just need to get a different manifold. this iap one is a peice of crap.

[lrb_2000]

So i've been driving this thing everyday. It takes awhile to start sometimes, due to the 810cc injectors I imagine.. but other than that, it's great. I get good mpg's. Probably at least 20+ in town, and over 30+ on the highways... I can't believe such a powerful build could yield such great results.

But the turbo never really sees boost on a daily basis. It takes at least 4k rpms to get into boost. But even 3k rpms shifting fast feels good. Probably due to the clutch. I'd recommend the extra money for a bigger turbo for people that want a daily driver that's a beast. You can drive it all day without really putting stress on the motor, even though the engine is ready for it. But when you want to, you can open it up, and smoke the **** out of anything around you. I smoked a 350z the other day on 8psi no problem.

I must have the ****iest looking s13 for as money that i've put into it. I swear I have at least 12k into this thing, and it looks like ****. But it goes like a bat out of hell. I love it. I just need to get of the welded diff, and it will be more enjoyable to drive daily, even though the welded diff really makes the car fun and predictable. Plus, the tires really don't wear as fast as you'd think.
Modified by lrb_2000 at 3:02 AM 1/19/2009

[kentuckyslider]

I've got about $9000 in mine and IMO it looks pretty good and runs 11's. What's your best times??? I am going holset HX35 and adding another 100whp as we speak. Should have 450whp for about $10500 on a clean coupe!!!

[lrb_2000]

I don't have any times. I was just breaking in the motor while the track was still open. It still only has 3,300 miles on it. This spring i'll get some times.

[idahotuner]

dude how high are you having to rev? i am back i know lol i am going see if i can get this turbo to on an sr from 4-7500 rpm. but also try tp get 550 to the wheels

[lrb_2000]

haha.. I have my limiter set to 7,200rpms due too a stock valve train.. the turbo wants to keep pulling though.

[aaronscomp]

i need another job nice build

[lrb_2000]

lol. thanks.

i'll have an update this weekend. haven't done much work on it. just drive the beast everyday, as my daily driver. got about 4k miles on her now.

[Tixmaster]

Nice builds guys. you guys already paid for all the big stuff dont cheap oiut on ecus and RRFPRs.

[daconkiftador]

turn up the boost, loL.

[lrb_2000]

So i finally went out again tonight to run a few cars... Had the boost around 12-14psi... I wish I would have taken my video cam, but I assumed someone else would have one.. wrong..

Anyways, Ran a trans am with a LT1 and 125 shot of nitrous, ~425hp, and beat him by about 1 car length, very close race.

Ran a fully built rb26dett s13 with twin gt30r's running 14.5psi and beat him by about 2 cars.. I can't believe that one.. he has no traction though... The car dyno'd 768whp at around 28psi, so I should have lost..

Then lost like 3 times to some 750cc Suzuki crotch rocket.. haha..

Overall I was quite impressed with my car. Water temp never hit over 195* and oil stayed around 180*.. This was the first time i've really ran my car since the rebuilt. She has about 5000 miles on it now.. but I had no idea it was that quick.. I'm going to head up to the track in a few week with slicks and race gas, turn the boost up and see what she will run..

[idahotuner]

So i finally went out again tonight to run a few cars... Had the boost around 12-14psi... I wish I would have taken my video cam, but I assumed someone else would have one.. wrong..

Anyways, Ran a trans am with a LT1 and 125 shot of nitrous, ~425hp, and beat him by about 1 car length, very close race.

Ran a fully built rb26dett s13 with twin gt30r's running 14.5psi and beat him by about 2 cars.. I can't believe that one.. he has no traction though... The car dyno'd 768whp at around 28psi, so I should have lost..

Then lost like 3 times to some 750cc Suzuki crotch rocket.. haha..

Overall I was quite impressed with my car. Water temp never hit over 195* and oil stayed around 180*.. This was the first time i've really ran my car since the rebuilt. She has about 5000 miles on it now.. but I had no idea it was that quick.. I'm going to head up to the track in a few week with slicks and race gas, turn the boost up and see what she will run..

very nice. where is this twin gt30 rb. that would take so long to hit boost. assuming you have only 3 cylinders to spool each turbo. dude this fall you should go to some of the oregon meets.

i am gladdd you car is staying in temp with you beating on it. i am kidna parinoid about mine, but i have done this stuff before mine torquing the bottem end bolts which cant be that hard.

[kentuckyslider]

Have you had it to the dyno yet?? How much boost can you run with the 9-1 pistons before you have to go to race fuel. I didn't read the entire thread but what are you tuning with? I've you should be able to get in the 10's with race gas at about 25psi on drag tires. Post up some recent pics and a dyno. Video your first trip to the track and post a slip.

[lrb_2000]

I'm pretty sure i'm maxed on pump gas.. my AFR stays at 12.5 at WOT... if I try to go any higher it will lean out... I'm using a Emance tune, SAFC 2, and AEM wideband.

I haven't had it on the dyno yet. We live in a somewhat small town, there's not really a dyno around here. I'll have to go up to spokane to get it on the dyno, and that's where the track is aswell.

[lrb_2000]

Here's some pictures I took a few minutes ago. Nothing fancy, engine is DIRTY! woooo.

[idahotuner]

hey dude. we have a brand new mustange dyno in walla walla. thats about 90 miles from clarkston. i think our rate is 50 for three pulls. its at Walla Walla University. we can do quarter miles times and all sorts of other stuff.

i can let you know when the next dyno night is. i might even be the one in charge of it. it would be nice to get some tuner cars on there. i am sick of seeing novas and pick ups on it.lol.

shoot me and email if your interested.

[nissan_star]

i have the same shift knob as you, thanks for the update!

[kentuckyslider]

I also have that shift knob on a v2 short shifter. You need to get a JWT rom tune or stand alone if you ever want to se the potential of your build. IMHO