'88 turbo II boost limit?
08-04-07, 10:48 PM
#1
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'88 turbo II boost limit?
what is the max amt of boost you could safely run from a stage 4 turbo on a 1988 10th anniversary rx7 turbo II?
08-04-07, 11:27 PM
#3
Lovin my 7
I think he meant s4.... Just going out on a limb....
he only has 2 posts.. You know the search function doesn't show up until you have 10-15 posts.
he only has 2 posts.. You know the search function doesn't show up until you have 10-15 posts.
Last edited by cpubugs; 08-04-07 at 11:29 PM. Reason: y
08-05-07, 10:43 AM
#4
yup, we need more info. searching before posting is always the best option, as this topic has been covered a few times. we just need more info on the engine condition and build, the fuel mods, the engine management, etc.. there are different amounts of boost best suited to your application.
08-06-07, 04:33 AM
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it's a 88 10AE 85K original miles. im replacing the stock turbo with a T70 turbo, 50mm wastegate, electronic boost controller, TurboXs BOV, and a 3" straight pipe exhaust. no other mods
08-06-07, 05:36 AM
#6
hopefully you will be doing some fuel mods, bigger injectors, probably new ecu, at least a rtek when they come out for the s5, and a much much larger intercooler than stock. if not, I'd say about 4psi of boost with with that turbo, maybe 8psi if your lucky
08-06-07, 10:32 AM
#7
yep, you'll need some fuel mods.
You said you had a walbro 255 allready, that's a great first step.
for a turbo like a T70 you're probably going to want a standalone EMS of some sort (megasquirt perhaps) and then some bigger injectors. 720 primaries and 1000cc secondaries (or larger)
You said you had a walbro 255 allready, that's a great first step.
for a turbo like a T70 you're probably going to want a standalone EMS of some sort (megasquirt perhaps) and then some bigger injectors. 720 primaries and 1000cc secondaries (or larger)
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08-06-07, 10:52 AM
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yep, you'll need some fuel mods.
You said you had a walbro 255 allready, that's a great first step.
for a turbo like a T70 you're probably going to want a standalone EMS of some sort (megasquirt perhaps) and then some bigger injectors. 720 primaries and 1000cc secondaries (or larger)
You said you had a walbro 255 allready, that's a great first step.
for a turbo like a T70 you're probably going to want a standalone EMS of some sort (megasquirt perhaps) and then some bigger injectors. 720 primaries and 1000cc secondaries (or larger)
08-06-07, 06:01 PM
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wait.....what?
08-06-07, 06:03 PM
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short answer: ~8.6 psi. long answer: you need fuel mods, or else pop goes the rotary.
08-07-07, 03:46 AM
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sorry, forgot to say my friend is givin me his slightly used injectors (720s&???), stage 2 clutch, and his intercooler. plus he said he might be able to get me a break on a nitrous express intercooler halo kit.
08-07-07, 11:22 AM
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08-07-07, 02:46 PM
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u really need to port the turbo wastegate first to eliminate boost creep..i got a s4 with 3in rev 2 rb exhaust and bonez short ram and it creeped up to 12 in end of 3rd and upper gears.....port wastegate and the bigger the better and mayb u wont end up lik me>>>
08-07-07, 03:03 PM
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Saw it and had to clarify. 
I agree, port the wastegate. The s4 wastegate is about the size of my pinky.
11-28-07, 04:20 PM
#21
No joke!!! You can't just go throwing on a turbocharger and calling it a day, that is how engines BLOW UP! You need fuel mods, and with fuel mods comes a way to manage those fuel mods, then you have to control the boost, especially with that turbo! I hope you have some money saved up cuz if you don't take these ideas into account you are looking at a steaming pile of rotor sheit.
11-28-07, 05:50 PM
#22
1.3L piston eater
i ran stock S4 turbo, mazdatrix FCD, walbro pump and a blitz BOV with a 3.5 inch exhaust STOCK wastegate / stock everything else (even airbox).. ran 12 psi naturally for months and my engine is perfectly fine, now im running microtech, hybrid garrett turbo and a few other things (proper setup) with the other setup it was fast as hell but it ran rich as a bitch and my intake was cooked from shooting 6 -7 foot flames everytime i let off at 3,000 rpm. my wallet was also empty from spending 10-15 bucks in gas a day! (stock BOV + stock ecu = running mega rich when it goes off)
note this is on the orig. engine from 1985 ! 144,000 and still tickin.
note this is on the orig. engine from 1985 ! 144,000 and still tickin.
11-28-07, 06:01 PM
#23
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i ran stock S4 turbo, mazdatrix FCD, walbro pump and a blitz BOV with a 3.5 inch exhaust STOCK wastegate / stock everything else (even airbox).. ran 12 psi naturally for months and my engine is perfectly fine, now im running microtech, hybrid garrett turbo and a few other things (proper setup) with the other setup it was fast as hell but it ran rich as a bitch and my intake was cooked from shooting 6 -7 foot flames everytime i let off at 3,000 rpm. my wallet was also empty from spending 10-15 bucks in gas a day! (stock BOV + stock ecu = running mega rich when it goes off)
note this is on the orig. engine from 1985 ! 144,000 and still tickin.
note this is on the orig. engine from 1985 ! 144,000 and still tickin.
how ... did your intake get cooked from your exhaust shooting flames? are you posting drunk or something?
Stock ECU with an aftermarket blowoff valve that vents to the atmospher (like the blitz) would cause it to go rich (and backfire for a second).... not having the stock BOV (vents back into the system of air that has already been metered ) ... sounds like you have no clue..
you crazy canadians.
Last edited by TweakGames; 11-28-07 at 06:07 PM.
11-28-07, 06:14 PM
#24
1.3L piston eater
i had a blitz DD BOV on there (forgot to mention)..well , the intake was black and crispy on the inside , from running rich which caused flames im guessing ( not flames actually going into the intake lol) and i was running stock injectors .. and unless my autometer boost gauge was lieing i was boosting at 12psi
