going top mount, which turbo/ecu?

[SilviaVsSupra]

have you guys heard much about Xcessive Motorsports?? their manifold looks HOT! im gonna go with that and ive been trying to decide on a turbo, either a GT3071R or some sort of T3/T4 with similar measurements... my question is, without adding injectors, and MAF, would an ecu tune be absolutely necessary? even while boosting under 8lbs? im not looking for more power, YET, this setup is for visual only(HIN coming up!), until it can rack up enough dough to do the 550lbs, MAF ad 272cams, and THEN decide on a ECU upgrade(maybe JWT... i dunno )

any and all help would be appreciated!

[DrifterProdigy85]

What kind of power are you going for? Top mount is usually for the power hungry so personally i would go GT30R .82, 850cc injectors, Power FC D Jetro, HKS 264 intake/272 exhaust. But if you only want 350whp you can stay bottom mount and do 2871R .64, 650cc injectors, HKS 264 Step 1 cams, and Enthalpy tune. This would actually get you around 370whp. Theses are just my opinions on what to go with, its all up to you really. Get the fuel and tune to handle the boost also. Dont skimp on that one bit.

[SilviaVsSupra]

yea i would stay bottom mount, but its for show purpose, long term will be slightly past 400, but not for before the end of the year i suppose.. im not trying to make a race car though, this car is more then anything for show, but being that its my daily, i need driveability, 850cc is way huge, my dads supra has 850s and its double my hp. im pretty set on the gt3071r, since a buddy is gonna get me one for a good price, but im just worried that its not going to run smooth w/o a tune, even if i do cut down the boost to around 8lbs(im running 290whp @13psi)... eventually i am ofcourse going to do some sort of ecu upgrade, but time and money isnt easy to come by, and i want to save enough to do injectors and MAF at the same time, and maybe if i win the Lotto, cams too!....

[Blown240sx]

850s ona straight 6 and 850s on a Inline 4 are two totally different injectors. Example buddy makes more HP than me with his RB25 on 370s than I am with 550s just cause he has more cylinders to make power with.

550s on a Inline 4 max out at 358 flywheel. 550s on my buds RB would put him near 500.

[SilviaVsSupra]

850s ona straight 6 and 850s on a Inline 4 are two totally different injectors. Example buddy makes more HP than me with his RB25 on 370s than I am with 550s just cause he has more cylinders to make power with.

550s on a Inline 4 max out at 358 flywheel. 550s on my buds RB would put him near 500.

good point.. i freind of mine was telling me about the Nismo injectors, he said they are the best for street, good idle, and put out more then they say they do.. i forget what size they were tho

[steeda763]

Just install a wideband O2 sensor, A/F gauge, and a piggyback, like S-AFC or SMT, and tune it yourself.

You're going out with that girl Andrea, aren't you? Man why are you doing all this just for show...haha you Wellington kids...
Modified by steeda763 at 2:22 PM 8/29/2006

[SilviaVsSupra]

Man why are you doing all this just for show...haha you Wellington kids...

Modified by steeda763 at 2:22 PM 8/29/2006

hey whats up justin! the top mount portion is just for show, but top mount will yeild more room for higher hp. if i wanted just performance, i would stay bottom mount, but i dont want to cheap out on this car(wich is why andrea dont get sht from me... lol) and i want to do the best set up i can, and SAFC cant handle the big injectors like 7s and up. tuning your own car is all great and what not, but i want it done right the first time and not have to worry about breaking sht until im ready to break sht.. how are those projects coming along?

[deathBooster]

What kind of power are you going for? Top mount is usually for the power hungry so personally i would go GT30R .82, 850cc injectors, Power FC D Jetro, HKS 264 intake/272 exhaust. But if you only want 350whp you can stay bottom mount and do 2871R .64, 650cc injectors, HKS 264 Step 1 cams, and Enthalpy tune. This would actually get you around 370whp. Theses are just my opinions on what to go with, its all up to you really. Get the fuel and tune to handle the boost also. Dont skimp on that one bit.

Question... well rite now i have a 2871 with 550cc injector,z32maf,3"straight pipe, safc2 and running 14psi i am not how much this is giving me rite now but weather did affected performance that was tuned during winter.. 1) what is the max boost with 550cc injectors.. i know that the larger injector and turbo the more lag.. rite now.. i do have lag starting at the lights... 2) what are the necesary mods to handle more hp, i want to be safe beside cams.

And i was considering a top mount because i've been having trouble with my turbo. it got knocked off 2 times already, my car is kinda low and i hit speed bumps a lot no matter how slow i go, i considered chopping off an inch of downpipe to life the entire exhaust i have like 2inch space. There is this top mount kit at enjukuracing for only 1800 cheaper than any turbo kit larger than the 2871r.. it says that with their my set up i can do 370hp??

[DrifterProdigy85]

550cc max around 350whp. Maybe if you up fuel pressure you can squeeze more power from them. 2871R .64, Greddy Elbow, 264 10.5mm cams, and a good tune will yield you around 370whp on 19psi. Probably get more if you have a Greddy Intake Manifold. Stock cams are too restrictive to get much past 330whp. Larger injectors arent really gonna hurt the idle as long as the tune is for the larger injectors. Not sure what you mean the larger injectors causing more lag because they dont. Only thing causing lag is the size of the turbo, intercooler piping design, and exhaust restriction.

For performance, the best setup is Top Mount. Bottom Mount is just an option for those of us that dont have the money to get everything to go Top Mount. I just pulled my turbo assembly off today and relized how much a PITA it is to pull the manifold, turbo, elbow, and lines out as one unit. Ended up hitting the oil dipstick, brake master cylinder, and the elbow is a tight fit with the steering shaft and bellhousing. Top Mount would definitly be better. At least things can come off piece by piece.

[deathBooster]

ok, how about if i just get the t3/t4 turbo and use my 555cc injectors?? how much can i get??

[Blown240sx]

about 300 wheel if your pushing it. Im putting out 270 or so at the wheels on 86% injector duty on 555cc injectors.

[SilviaVsSupra]

something else has to be considerd, im not sure what, but i make 290whp at 12-13psi(hks actuator) and i dont have cams or injectors, let alone a air/fuel tune... if i can find my dyno sheet il post it up

[Spun180]

I am running 550cc with a T3/T4 and put 325hp and 290ft/lbs down. No internal mods except for cam gears.

[DrifterProdigy85]

550cc are good to almost 350whp with the right tuning. Id opt for 740 or larger though.

[SilviaVsSupra]

well i just got some new bills in, the 1400 i had going toward a turbo system is now gone.. so i gues i have quite a while to decide what to do .. first thing is to finish kouki front end, and all the fiberglass biz.. maybe il keep my hood down for HIN.. any ran a unichip on their sr20? or know anyone? the system seems awesome, but they dont make the PnP for the SR.. but they can still do a custom job, im gonna stop by a local shop that does them and ask about it.. maybe go that route when i get a bankroll... or win the lotto..

[Jamison182]

I have a Peakboost t3/t4 kit. I ran 7lbs on stock sr ecu, stock MAF, walbro 255, and a big FMIC and had no problems at all. If your still intrested in couple weeks, shoot me an offer.- Jim

[SilviaVsSupra]

thats awesome, how much power did you make??

[Jamison182]

felt like 300 at the wheels, never had it dyno'ed though