Reliability of 3rd Gen rx-7 engines
- Thread starter thedarcsage
- Start date
Turbo Matty P
Banned
how'd you do it?? I'm hoping the Power FC will keep everything in check.
twiztedjeckel
Member
- :
- '04 SVT Focus
yeah, that much coming out of a stock motor with stock twins is a bit un the dumbass side of things. but then again if you like to live on the edge thats the way to go.
now if we were talking about a supra making 400whp on a stock block and turbo's thats easily doable and then some,well quite a bit more actually.
i can't wait for my buddy to get his car up and running and down to KDR for some tuning. unfortunetly he's still waiting for some parts to come in and some things to be polished on his GT35/40
now if we were talking about a supra making 400whp on a stock block and turbo's thats easily doable and then some,well quite a bit more actually.
i can't wait for my buddy to get his car up and running and down to KDR for some tuning. unfortunetly he's still waiting for some parts to come in and some things to be polished on his GT35/40
Turbo Matty P
Banned
the guy I'm buying the car from had every bolt on possible to the original 60K motor. He had the stock twin turbos upgraded and the wastegate ported. He also had the twins diverter welded open so both turbos run full open all the time. This created some lag below 3K, but he said the top end gain was amazing. He had over 400whp for almost 20K miles. When he purchased the car it had an extended "aftermarket" warranty on the powertrain. He had to put the car back to stock to have it inspected. Once the inspection is done the new motor will be re-installed in the car with his full exhaust, P-FC, newly rebuilt FZ tranny (5th gear pulls like a demon!) and a new stock clutch. He said with even mild tuning via the P-FC I shold look for at least 320-340whp. He said the P-FC will increase the boost from 10 to 12psi, but the main gain is in the exhaust and fuel tuning. He also put on a brand new set of 245's on the rear. The contact patch on these tires is HUGE! This thing will grip like sum-b****. I'm expecting hgih to mid 12's on street tires and pump gas. With my special track-gas I make I could be solid 12's on the weekends!
the gt35/40 is the way to go! did he get the kit through rotary extreme?
turbo matty,
did the previous owner dyno the car with that stock motor pulling 400rwhp? if he did i think us guys on rx7club would be truely impressed and would like to know how he was able to pull those numbers with upgraded stock twins and a nonstreet port motor. the nonsequencial setup will cause lag and some power (not much) but most people do it for a reliability mod and to get rid of the rats nest under the manifold.
turbo matty,
did the previous owner dyno the car with that stock motor pulling 400rwhp? if he did i think us guys on rx7club would be truely impressed and would like to know how he was able to pull those numbers with upgraded stock twins and a nonstreet port motor. the nonsequencial setup will cause lag and some power (not much) but most people do it for a reliability mod and to get rid of the rats nest under the manifold.
Turbo Matty P
Banned
yeah we're both on rx7club. com
His name is ABADr1. he has some of his mods listed in his sig.
His name is ABADr1. he has some of his mods listed in his sig.
twiztedjeckel
Member
- :
- '04 SVT Focus
Turbo Matty P
Banned
upgrades on who? abadR1?? he had bigger injectors, FMIC, aluminum AST and an AWR radiator. He said cooling was never a problem with his car.
twiztedjeckel
Member
- :
- '04 SVT Focus
with those mods i'd hope not. what size injectors was he running anyway?
Turbo Matty P
Banned
I think he told me 850cc and 1600cc secondaries. I'm new to the rotary thing so my numbers may be off, but I know he was running 400whp. He had the non-sequential turbo mod and he told me he was running 17psi with all of those bolt-ons. Also, he said he only bought the bigger radiator because the FMIC blocked off the stock one. I'm just going to keep the sequential set-up at 12psi run the stock intercooler and radiator and use distilled water and water wetter. It always worked real well for me in my SHO.
twiztedjeckel
Member
- :
- '04 SVT Focus
holy s*** dude. you're running the stock intercooler? not a wise decision. you may want to back the boost down a couple notches. how much of the car is being turned back to stock form? you said you're using the stock IC and rad which is fine but you throw an intake, and full exhaust on there you're starting to play with fire. yes you can control things with the PFC which is good but not a save all. you need a bigger IC and what about a Cosmo fuel pump or even any aftermarket high flow in tank one? if you can get some extra money together buy a new IC setup. bigger stock location one,side mount,front mount,whatever. just try to work something out. the plastic end tanks on those things aren't worth the s*** that the worker who made them takes daily.
Turbo Matty P
Banned
Jeckel, I've been speaking with RX-7 tuners who have been doing this for years. Everyone has told me the same thing. Unless I'm going over 12psi I won't need a new IC. They say a FMIC will essentailyl block of the air flow to the radiator and the rest of the motor. Also 12psi is only an extra 2psi. I was told the stock injectors were fine up to 15psi or so. My friend was running 17psi so he upgraded them. I believe he had a boost-a-pump or the likes installed to keep things in check. The P-FC was really used for it's base tuning map and a watchdog to keep track of engine temps and stuff.
Turbo Matty P
Banned
Here are a few pics. These aren't the best because they dont show any of the engine bay, but you get an idea!!
twiztedjeckel
Member
- :
- '04 SVT Focus
that's the car? nice '99 spec stuff. love the scoot hood. little agressive though for my taste with a stock body but doesn't look too bad with that front end.
hey, if people said you're safe with that then by all means go by what they say. you certainly don't have to go with a front mount though but thats certainly a possibility. you do have other options. for another $1500 or so you could find an aftermark rad and an upgraged IC. you of all people should know cooling is one of the main downfalls of the 3rd gen RX-7. if the car is stock it'll do fine with its stock parts. thats just my opinion though
hey, if people said you're safe with that then by all means go by what they say. you certainly don't have to go with a front mount though but thats certainly a possibility. you do have other options. for another $1500 or so you could find an aftermark rad and an upgraged IC. you of all people should know cooling is one of the main downfalls of the 3rd gen RX-7. if the car is stock it'll do fine with its stock parts. thats just my opinion though
if i were you i would do a smic like the m2 large or medium. that will be able to help out along with the increase in boost. if you do decide that you are going to stay with the stock i/c get a hard pipe kit! the lower i/c pipe tends to rip easy with the increase in boost and they are usually weak, after all they are 10yrs old! i had a buddy go through two on the same day when we were tuning his. however if you decide to unpgrade to a m2 hard pipe kit will come w/ it and you'll have no worries. are you getting new turbos or the ones that were on the car before?
