should I?

[spools420a]

So I was thinking about upping the boost in my redtop sr here in a few days with a mbc from 7 psi to eather 9-10 psi,Im just currently running stock boost at the moment with a few mods

255 lph walbro
stock injectors
stock t25
greddy FMIC
3 in down pipe then to stock muffler and cat/piping
turbo timer
and hks bov

Now I was planning on getting a wideband along with a 1:1 fpr before I upped the boost but A guy was telling me since its only a few pounds of boost extra it will be just fine so should I up it a few or wait for WB and fpr?

And thank you.

[shiftdrift]

it's not going to matter. do it.

[spools420a]

Sounds good,Also Ive been considering getting the AEM water/meth injection in the future just to keep exhaust temps and detonation as minumum as possable and I know it sounds like overkill but would it still be a wise item to purchase since its only $300 just as extra insurance or should I just let mr intercooler do his job and pocket the cash?

[shiftdrift]

you're stock. meth/water would not be on my list of upgrades.

[GSXRJJordan]

You'll be fine, up to 13 or 14psi. Then your turbo is the thing holding you back... next is the MAF/injectors, but a bump in base fuel pressure with an adjustable FPR could help ya there.

Regardless, go for 12 or 13psi @ the manifold and have a blast. It makes a very pleasant difference.

[spools420a]

Thanks alot,Yea Ill boost it up to 10 then after I get the wideband and 1:1 afpr Ill probably bump to 12psi but I think Ima run some sort of piggyback possably crapola safc,as long as as im running around 11.5:1 to 12:1 on the wideband ill be happy,Then from there Ill probably get a t28 with some 550cc injectors/maf maybe go to 13-14 and hold for awhile does this sound like a safe plan.When should I start considering retarding the timing maybe after 12 psi?Again thanks for the input Im still pretty new to sr I came from junk dsm's =]

[z2roll4life7]

from the Factory Sr's are running 11 psi.... you just dont have the restricter the goes in between the the vaccum port and the wastegate so your just on the wastegatespring you dont have to do anything to run 11psi

[spools420a]

So wait Its missing the restrictor in the vacuum line then?Where is it and/or to hook it up you lost me.

[96Turbo]

ur MBC is doing the same job as this restrictor he's talking about. only urs is adjustable instead of fixed.

7psi is actually less than the SR20 put out in factory trim, so bump it up to 11 and don't sweat.

for anything past stock boost you guys are just bumping up the base fuel pressure? I thought it was pretty critical to at least have a piggyback at that point? no?

[S14DB]

Factory has a solenoid that keeps the boost at 10~11psi and the stock WG is 6~7psi. Most people chuck the solenoid in the swap and are stuck at the WG 6~7. You can safely go to 10 with a mbc because that is what the stock system is designed for.

[spools420a]

:hs:awesome then this meens I wont have to retard the timing and lose a little power if this is the case

wait,So then the gaps should be wrong on the spark plugs if were running less boost the whole time since were missing the restricor plus silinoid? At 7 psi we should actually give it a hair larger spark plug gap since the specs are designed for 10-11 psi,I would imagine?

[jspaeth]

Seriously man with all due respect, it is a stock SR with stock turbo. If you do ANY reading at all on here, you will find that upping the boost to 13-14 psi is NOT a big deal AT ALL.

You just turn up the boost, and go. The stock FPR is just fine, and if you are on stock ECU and everything is working, there will be no problems.

You don't need to run out and buy meth injection and a wideband for 240 whp.

[lazysk8er2]

a wideband is always a good investment. also egt gauge. boost gauge, oil pressure and water temp. thats about it until u get in the 400 hp range.

but yea stock is 11lbs your actually underusing your setup.

kinda like running a stock evo or sti at 10lbs makes no sense. stock is around 19lbs for them

[z2roll4life7]

yeah man just turn it up to 14psi and have fun the stock maf can handle the extra airflow getting pulled in by the turbo and the injectors wont max out on a t25
shit i made 300hp on the stock injectors no lie look in the 2871r thread

[jspaeth]

a wideband is always a good investment. also egt gauge. boost gauge, oil pressure and water temp. thats about it until u get in the 400 hp range.

but yea stock is 11lbs your actually underusing your setup.

kinda like running a stock evo or sti at 10lbs makes no sense. stock is around 19lbs for them


Uhhhh I thought stock was 7 psi? Check Wikipedia or any other source, it is clear as day.

[z2roll4life7]

From the factory they all run at 11psi because of the boost solenoid that comes with the motor just 90% of people dont have the boost solenoid when they do the swap the wastegate spring is at 7psi

[lazysk8er2]

That is correct sir that solenoid is key. wastegate is 7lbs

check wiki and change it lol cuz that shit is wrong

[mademedoit]

These guys are all right about the 10psi solenoid, I found out about it when I was on ebay looking for an ignitor chip. Theres a small metal bracket that holds the ignitor chip and solenoid. Since are cars are lhd and were changing the way the wiring harness is routed we don't use that bracket. Heres a pic of one for sale from this site!http://zilvia.net/f/sale-items/297719-los-angeles-county-area-s-chassis-garage-sale.htmlhttp://i5.photobucket.com/albums/y159/jdm240/DSCN3112.jpg

[spools420a]

whats an easy way to shim or can i adjust the wastegate actuator arm for an easy boost increase,i dont have a mbc yet.

[Sterlz]

buy a cheap manual boost controller and turn the knob

[spools420a]

ok I couldnt find any adjustment on my actuator arm but I read I can use washers but where do I place them,On the rod side or the diaphram side of the wastegate bracket,also how many should i start with so i dont run gobs of boost first try lol.

[spools420a]

buy a cheap manual boost controller and turn the knob
I will but I have to order it and I wanna run more boost like right now lol

[Sterlz]

Then go buy a small bleeder valve from home depot, same thing

[lazysk8er2]

or spend the 50 bucks for a mbc...cmon people jeez

[Sterlz]

Uhh? Excuse me?

[Walperstyle]

Hate hearing of people cheaping out on builds. Water meth is a waste of your money if you have not built the internals. Water meth is more for the 400+hp guys. This isn't you.

[spools420a]

yeah man just turn it up to 14psi and have fun the stock maf can handle the extra airflow getting pulled in by the turbo and the injectors wont max out on a t25
shit i made 300hp on the stock injectors no lie look in the 2871r thread
seems like 300hp would definitly get 100% duty cycle?hmm...I definitly dont wanna try that I'll invest in 550's

[spools420a]

or spend the 50 bucks for a mbc...cmon people jeez
mbc was purchased yesterday,Also my turbo timer has boost guage/peek boost hold/overboost warning so I'll play with it and set it so anything over 11 psi will throw an overboost warning so I dont exceed it.Ill be happy around 10ish psi for awhile then ill save for some more goodies,Thanks for the input.