buying a rx7 with a t04s turbo, just wanted to know what mods i need for the engine to run safely.

current mods are:
-apexi gt fmic
-blitz nura spec exh
-re downpipe/midpipe
-rebuilt engine with apex seals

what else do i need??
-injectors what size and how many?
-supra fuel pump?
-exhaust manifold?
-wastegate?
and ne thing im missing cuz i dont wanna blow this engine. thanks guys

 

Most importantly, an ECU. I think you should be able to run 1300cc secondary injectors safely at 15psi. Any higher & you should probably use 1600s with a Haltech. A PowerFC tuned by someone like XS is good for below 17psi & 1300s.

Yes, a fuel pump will definitely be a necessity, Bosch & Walbro have good reputations.

Question-Does the car already have the turbo on it? Then it should already be mounted on the manifold; if the turbo is by itself to be installed, then you can get a manifold from Crispeed at South Florida Performance. A manifold is included if you buy a T04S kit like HKS or XS, so is the wastegate.

 

the car just has a turbo on it. the guy just purchased the turbo alone. i think he has a pop off valve or something.

 

I'm confused here... Are you saying he's selling you a car with stock turbos currently on it and he is also including an aftermarket turbo on the side? When you say it just has a turbo "on it", are you saying installed or not installed?

 

ok i want to buy this rx7 and his engine has blown up like 3 times cuz he has a to4s turbo upgrade with no upgraded injectors, no upgraded fuel pump and no upgraded ecu. hes a doomass.
so i was just wondering what i need to put on the car so that it wont blow up. a litte more clearer now right?

 

Nope I still don't get it. From what i understand is he has the T04 in the car right now correct? Then why do you need exhaust manifold and Wastgate?

 

Violator-

To have an upgraded Single turbo "INSTALLED" on the car to have the vechile "BLOW UP", it will have a Manifold, Wastegate, Oil Lines, Downpipe already fit for that turbo.

Therefore, to sustain the current setup, you need to evaluate your situation. Ultimalty, you will need:

1) ECU (PFC, AEM, Haltech, Wolf, etc)
2) New EFI system. Either a new Fuel Pump & Injectors, or the whole ball of wax (FP, Injector, Regulator, Rails, etc).
3) Possibly a boost controller. (Profec B, AVC-R, HKS, etc). Find out what the PSI on wastegate spring is.

Also, make sure the vehicle has :
1) good BOV (not POP off valve),
2) ignition system (good wires, and cold plugs)
3) Upgraded clutch to support the power
4) A good air filter for the turbo (no one wants bad things going in there!)
5) Gauge set. Very important here. You need to know whats going on with your car. Ditch any autometer gauges you have and go with Defi, Greddy, etc. Standard sets are : Boost, Water Temp, EGT.

Mike

1) How much boost are you going to run?

 

what is wrong with autometer gauges?

 

Im at 90% on my 1300cc injectors (tuned by XS) with my XS T04S kit.

I would go with 1600ccs with the new rail.

 

ok cafe he has just the to4s turbo with the mods i listed above, from what he has told me he has a crappy manifold, no upgraded wastegate, no upgraded fuel pump, and no upgraded ecu. thats why he has blown his engine like 3 times. he bought just the turbo used and decided to slap on the just the turbo without anything else. thats why im asking what i need to do after i buy his car so i dont follow his footsteps by blowing up the engine.

red-rx7 i head that if i get the pfc ecu that it only supports 1300cc injectors which will limit me to only 17psi is that correct? if i get a haltec ecu with 1600cc what is the max psi i can run safetly? i just wanna run like low 11s 1/4 being a daily driver heheh

dayum im gonna be broke after all this shiet just to keep that car running. and hes got the old skool clone veilside shiet that i gotta get rid of too

also if i purchase a pfc i can contol the boost from there right?

what is a pop off valve? is it a backup source for the
wastegate not releasing the pressure?

so many questions hehe sorry

 

wastegate... its mounted on one of the pipes between your turbo and your throttle body... if your turbo overboosts above the psi that the pop off is set to it releases a valve shooting the built up pressuse saving your engine....... pfc can control boost if you don't have the extra $ for a regular one...
if you want 11's you also need to get a different LS Differential so you can run slicks... my car was really f*ing powerful but not reliable thats why I'm sticking w/ reliable. you don't need 17lbs to run 11's I was at 14lbs and I could have made it well into the 11's... 1300's are a good idea for a good fuel supply.
Ryker
P.S. pm me

 

What?

ok- Wonder1and:
The wastegate isn't mounted between turbo & throttlebody. Thats a BOV or Pop off unit. The wastegate is on the physical EXHAUST manifold itself.

Violator 1300cc injectors are not the reason you are limited to 17psi; the map sensor is. Granted, 1300cc injectors may be near full duty cycle.

The PFC uses the stock map sensor. The stock map sensor only reads up to 17.45psi of boost. Anything afterwords, it goes flakey. Also, the PFC can handle up to 1500cc injectors.

The Haltech E6k uses a GM 1,2, or 3 bar map sensor. Thus allowing you the potential to go to 30+ psi of boost. The Haltech doesn't care what injectors you run. Rather; it is all rated in a fuel curve with injector mS of opening time per rpm per boost pressure.

Also, you indicated that . Here is how the system works on single turbo setups:

The rotor housinga vents exhaust gas from the combustion process, which is being collected in the manifold.

The manifold has an intake runner from each exhaust port which ultimatly runs to the flange the turbo is mounted on. Inbetween the exhaust ports runners and the turbo flange; there is another runner that leads to a wastegate flange.

What happens is that the wastegate has a spring inside which allows for vented pressure. So, as the pressure builds goes through the manifold, it spools the turbo. After a certain pressure in the manifold is reached (wastegate spring), the wastegate will open and vent off excess pressure; thus not spooling the turbo any further.

The downpipe is attached to the rear of the turbo, which the exhaust flows out of. In many cases, the wastegate is plumbed back into the downpipe (where it vents off the excess pressure).

Once the turbo sucks in air through the inlet, it forces it in piping which generally leads to an intercooler. Then from the intercooler, it goes to the throttlebody.

Typically, you will have a BOV on this piping which will vent off any excess pressure after the throttlebody closes; to prevent the turbo from surging, or spinning backwards.

Mike

 

ok guys i just talked to the dude with the rx7 and he said that the freaking to4s housing is cracked. shiet!!

so he said that he will install the stock twins back on so i can at least drive the damn thing home and not TOW it.

so my qeustion is there alot of work to change from single turbo back to the stock twins?? he said its a peice of cake just like changin a set of headers is this true?

also ne one know where i ca just purchase a to4s turbo alone? not kit just the turbo

 

XS sells T04S' by itself.