kamikazewangan

Will this be ok for the 14psi range? This is what the internal rebuild is going to be:
atkins 2mm 2pc apex seals
atkins thermal pellet replacement
atkins aftermarket gasket kit with internal o-rings
atkins viton oil o-rings
Mazda OEM front and rear main seals
Acceptable used rotor housings
93-95 FD corner seal springs
Streetport intake/exhaust

I just want to know if that will hold down 14psi in hi-boost mode and about 7psi in low mode, daily driven?

Im new to the Rotary club, Im used to the mk3 supras, Had 2 88 turbo 5spd targas. I finally got one of these and Im going for a decent tune on stock or small upgrade, upgrade only to eliminate boost creep.

I would also have the following mods:
3" dp
dp to a 2.5" Y str8 piped to 2 cans on rear n1's
e-fans
cone air filter
emmisiions removed
Ground/charging system rewire
FD fuel pump
After market vent to air BOV
MSD 6 ignition box+wires
hks evc2 boost controller

Whatcha think, do I really need the upgraded ignition for 14psi? Will I need the next stup up in injectors 720cc's to do 14psi, or will the stockers suffice for this task? Im hoping so although it seems like on the supras around 14psi you were close to the 85% mark on pulsewidth, and i know those were 440's btw.

Thanks in advance.
-Ben-

hondahater

iTrader: (2)

well first off the stock turbo is not good past 12psi and second off if you did go that high I would replace with 720cc secondaries and fuel pump along with a fuel pump rewire. Also I would get a front mounted intercooler because the stock intercooler is no good past 12psi as well unless you are running water injection. You would also need the safc to controll the added fuel as well. If you don't change out the injectors at the very least change out the pump.

ddub

Stock turbo or upgraded? 14psi would be start pushing close to or past its efficiency, 13psi is what I hear as standard for the most you can efficiently run on the stock turbo.

Stock topmount intercooler? I'd go with a frontmount if you want to push 14psi.

Larger secondaries with a larger pump (which you listed) with something to tune them down would be safer in case you are close to running lean.

ddub

He already said he's going to use an FD fuel pump.

hondahater

iTrader: (2)

ahhh so he did, sorry didn't see that.

kamikazewangan

Ok, I didnt read a past post further down, 14 was the benchmark in supra boost for me, seems that the same mark in an rx7 would be 12psi.

Ok all things listed for 12psi good to go then I take it, Question about the injectors their are 4 correct, if I were to step up what size would all four be?

Also whats the give or take hp tq number when a fc is pushing 12psi.

Sorry bout not hitting that search button <boot to my head>
-Ben-

ddub

Yes four. Stock is 550cc's all around for a TII. You'd be fine running 550cc primaries and 720cc secondaries with some kind of fuel controller to tune them down done via a wideband of some sort.

HP and TQ is hard to say it all depends on the size of the streetport you're doing, how aggressively you're going to tune, other mods, etc.

hondahater

iTrader: (2)

well if you are only hitting 12psi you can probably get away with the stock injectors but definatley a fuel pump and FUEL PUMP REWIRE. Do a search on it. I had an upgraded fuel pump getting very bad fuel pressure for some reason so I figured I would do the fuel pump rewire and it was like night and day! Also if you do want to get larger injectors I would go with 720cc secondaries. You can get these on this forum or on rx7.com. If you do get larger injectors you are going to need to get resisters again do a search on why. Also if you go to this extreme you may want to get an safc. Now here is something I would do if I where you. You can either get the rtek 1.5 chip or rtek 1.7 chip depending on what injectors you descided to get. Go to www.pocketlogger.com and find out what they do but basically the 1.5 is for the stock 550cc injectors and the 1.7 is for the 720cc injectors. If you are going to get the 720cc injectors the rtek will make it to where you don't have to tune those new 720cc's with an safc and even eliminates the need for it if you have a stock turbo. CHeck out the features though on these chips! THey are great!

kamikazewangan

Wow exactly what I wish I had for my supra.... haha and alot cheaper than the fcd and lexus AFM was... Anyway ty for that tidbit.

hondahater

iTrader: (2)

no problem

ddub

He won't need resistors if his car is an 87 Turbo, because that used low impedence injectors.

Also with the rtek 1.7, they do definitely do a better job at handling bigger injectors than the stock ECU, that's true, but from what I've heard with certain levels of mods or without mods too, an SAFC can help a lot for minor fine tunings that still might need to be done. Like if you don't have very many mods but you have the rtek 1.7 you might be running too rich, for example.

kamikaze, if you don't get the rtek you'll need a fuel cut defender (which is built into the rtek), otherwise you'll get fuel cut at 8psi or something.

hondahater

iTrader: (2)

I believe in the first post he said he has an 88tII. I maybe mistaken though. and yes your right to find tune you can use an safc however it is not required.

nevermind I just see 88 turbo targa witch must be for a supra and the 87 looks like its a crx si??? I'm confused