im just wondering what a round about time would be..let me know anyone?

 

I was able to get a 15.1 stock. Few weeks later I ran a 14.2 after a few mods. I should now be in the 13s.

All depends on what you have done.

 

I ran a 13.88 yesterday but my fuel pump **** the bed right at the end i probably could have pulled a 13.5.
Mods.
1987 turbo II with JDM S5 swap
Large street port
PanSport ECU with SAFC for dial in
Boost controller @ 14 psi
FMIC With BOV
Mazda Speed clutch
All emisions removed
3" exhaust from turbo back
msd 6AL
Fuel pump rewire.
HKS Intake
HKS plugs with RE wires
Kei office front/ tein rear coil overs
Theres more that i am missing i am sure.

 

I ran a 15.01@98 without launching and a 0-60' of 2.5 and spinning. I have stock turbo at stock boost with a ported wastegate, rb rev2 exhaust, hks intake, tb mod, and rtek 1.5. I am only running like 6psi so if i can bump it to 8 and need some good tires i could probably get around a 14.5 with launching maybe better.

 

a couple weeks ago i ran a 13.94 i cant remember the mph i think it was 103

stock port s4 turbo motor
3 inch turbo back exhaust
3 inch tid
no emissions
fcd

not sure what psi it was running but it was probly 12-14

the next pass my motor blew

 

^^well if you wouldnt run 12-14 psi w/o any additional fuel--those things tend to happen

 

haha damn, thats beat.. i was planning on running about 10 lbs of boost after i put the fcd in you think that should be alright?

 

Don't turn up the boost if you don't have enough fuel for it e.g. injectors and a way to tune them. Otherwise...boom goes your engine.

 

you want 10 psi?

get 720 secondaries and aeromotive fpr for boosted engines.

you will be able to run up 10 psi without hurting your motor much. you could run 14 psi and still be rich with this set up but i would only do it for short short pulls in cold/cool nights.

remember.running 12-14 psi without tuning timing and fuel could dramaticaly shorten your engines life. as that dude found out the hardway

 

I am running 14 PSI on stock injector, stock rewired fuel pump and SAFC with a PANsport ECU and my air fuels are great. The stock pump can flow a decent bit of fuel ( about 220lph) and the stock injectors should be good up around 300 hp. I hit 248 hp and my air fuels were ok. so..... i geuss it has to do more with the tunning/ tunner. ( puts on flame suit)

 

where you @ in PA?

 

i have an 87 t2 and i ran a 13.80's at 101 rear primary not firing so i had to spin through first and stock clutch slipping in third to fifth had like a 1.89 60 ft time and missed third . i am running an rtek 1.7 garrett t04b at 12 psi stock primaries and 1000 secs venom 255 lph blitz sbcid stock tmic rats nest gone and emissions gone custom tid blitz bov and t timer aem wide band kit . was rich as hell in front rotor and lean in rear but showed 11.5 afr b/c large sec. injectors now i fixed problem im runnin like 9.??? afr at twelve so as soon as i install act clutch kit im gonna bump it to 15 psi which bared me a nice 12.0 afr max

 

1.89 0-60 foot How did you manage that? What rpm did you launch at, tires, and suspension. I got a 2.5 without launching but it still spins and dont want to since it will just spin.

 

i was launching at around 4000 and slipping clutch to build boost and lower wheel spin, i have timeslip but dont have a webcam and my digicam is brocken. as i said earlier rear primary wasnt firing so i had to launch in secondary range .

 

oh yeah stock suspension as far as i know and fusion htr+ tires 215 55 16 rears

 

Stock injectors are not good for 300 hp, at least no for long! In order to acheive 300 crank hp you would have to run the stock injectors at 100% duty cycle which would over heat them and cause them to fail prematurely. Check out this fuel calculator for more reliable info on fuel requirements at different power levels.

http://rx7.com/cgi-local/2ndgencalc.cgi


If you want to run 12+psi on the stock turbo as cheap as possible, I suggest a pair of 720cc injectors(ebay $125) + an rtek 7 ecu upgrade($125)= $250 total, that's not much compared to an engine rebuild.

 

I ran a 14.9 with

RB 2.5 dp
bonez 2.5 cat
rb 2.5 catback
apexi intake
rp fcd
aem tru boost set to 50% duty cycle (7.5 in first, 8.5-9 in fourth)
stock sized wastegate
153k original engine that eats a small amount of coolant and grinds 2nd gear
17x8 wheels on 215 Nexxens
no ps, air pump, acv, ac
act 6 puck

slipping clutch at 3-4k I landed a 2.3 60'


It looks like stock to lightly modified tiis pull 15.5 - 14.5 VERY consistantly

 

While part of this topic is on safe boost. Does 7psi with about 8psi peak of boost creep (1psi creep), rev tii racing beat exhaust, fcd, ported wastegate sound safe for an 87 t2? What is the safe maximum boost you can get out of an s4 t2?

 

You'll be fine. Fuel cut is at 12 psi IIRC.

 

i havent ran the 1/4 yet but i get a 8.290 @91 mph with 2.1 60 ft. in the 1/8th and see sig. for mods

 

9 psi is safe boost with a FCDS.

Mine has always done 7 psi with a 9 psi creep in third gear. Never had a prob.
I have 720cc 2nds and FCD.

ANd Fuel cut it not at 12 psi. Its lower.

 

I boost 8psi on the stock turbo 550p/750s injectors. Tuning via a piggyback and RE-Am ECU (type-B). I have a re-wired walbro fuel pump that sees 13.5v minimum under full boost.

The motor is a pineapple race motor with a mild street port.

Even at this low boost im basically at max duty cycle for these injectors and my turbo is pretty taxed as the car puts 250-270 to the ground depending on what dyno it is on...

Stock injectors are not safe for much if any increase in boost or apreciable increase in power. I also challenge anyone to show me a FC with a stock turbo that can hold any more than about 10psi up to redline...

Because with the street port mine drops off to 7psi at redline and its a brand new turbo (as in factory new).

Further, fuel cut on a stock ECU car with no fuel cut defender is about 8psi.

 

I ran a 14.2@97 with Racing Beat Turbo Back and an FCD.

 

I have a question!! My car is putting out 390hp, my ??? is what do you think I should be running the 1/4 mile at???

 

mid 11's around 120ish+