2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Stock Turbo On 1987 RX7

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Old Sep 12, 2005 | 12:11 AM
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From: Red Deer
Stock Turbo On 1987 RX7

WHat is it? And whats the max boost it can handle? Cheers.
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Old Sep 12, 2005 | 12:19 AM
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its not about max boost it can handle you gotta make shure anything about the factory boost you have the fuel to upkeep like a fuelpump/fuel pressure regulator/injectors or something to control it like an APexi SAFC but after i had fuel mods i ran about 14 pounds on stock turbo
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Old Sep 12, 2005 | 12:29 AM
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Originally Posted by rfc_13
WHat is it? And whats the max boost it can handle? Cheers.

if you dont know... you have a lot to learn before you ever turn up the boost.
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Old Sep 12, 2005 | 12:32 AM
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FAQ? Search? Anybody?
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Old Sep 12, 2005 | 08:22 PM
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ALright, im not planning on turning it up, i just want to know what the max is and the what kind of turbo it is, can anyone answer that. You people are jumping to conclusions, i just want to learn.
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Old Sep 12, 2005 | 08:27 PM
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Read the stickied threads on top of the 2nd gen part of the forum. FAQ for FC, What did the fc come with....Those have all the info you need and more. Also, use the search button on the top right. Research before you ask please. A lot of people will give you **** if you ask a common, simple question without searching.

Last edited by BuffDaddy915; Sep 12, 2005 at 08:31 PM.
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Old Sep 12, 2005 | 08:32 PM
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It is a Hitachi HT-18-S, it has a water cooled center section. It has a unique footprint, not compatible with t3/t4 style. Has an internal wastegate, and it should be heavily ported if you are planning on using it at more than the stock boost level. It can be hybridized (sp?)to a 60-1 with different wheels and housings.

Hope this helps,
Vince
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Old Sep 12, 2005 | 09:27 PM
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From: Red Deer
Cheers Vince, appreciate it.
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Old Sep 12, 2005 | 09:54 PM
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someone want to expand on the hybridizing of it to a 60-1?
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Old Sep 13, 2005 | 06:18 AM
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Just remember a stock 87 turbo 2 can only handle around 7.5 psi without going into fuelcut,stock intercooler is only rated to 11.50 psi before possiably rupturing.
Stock fuel system is only good for 10 psi(pump,injectors,ect,ect)
And last but not least,your stock ECU will only adjust fuel mix upto 12 psi effectively.
87 turbo was a T 1 7 I believe 5psi to 17 psi MAX
The car stock will handle 10 psi easily with the aid of a fuelcut defense,but I recommend you study up on your car first
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Old Sep 13, 2005 | 12:06 PM
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Originally Posted by breckboarder55
someone want to expand on the hybridizing of it to a 60-1?

remove stock compressor cover
loosen stock compressor nut
remove stock compressor wheel
install 60-1 compressor wheel
tighten compressor nut
isntall modfiied t04b cover
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Old Sep 13, 2005 | 12:08 PM
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Originally Posted by RotorJunkie
Just remember a stock 87 turbo 2 can only handle around 7.5 psi without going into fuelcut,stock intercooler is only rated to 11.50 psi before possiably rupturing.
Stock fuel system is only good for 10 psi(pump,injectors,ect,ect)
And last but not least,your stock ECU will only adjust fuel mix upto 12 psi effectively.
87 turbo was a T 1 7 I believe 5psi to 17 psi MAX
The car stock will handle 10 psi easily with the aid of a fuelcut defense,but I recommend you study up on your car first


intercooler is rated at 11.5psi... where did you get that from?
it ruptures over 11.5psi... where did you get that from?
stock turbo is a T17 and boosts from 5psi to 17 psi... where did you get that from?
ECU would NOT adjust fuel to 12psi IF THE FUEL CUT TELLS THE ECU ITS BOOSTING 7.5PSI ALL THE TIME

i suggest YOU study up on your car first

(Edit...Remove flame)

Last edited by Aaron Cake; Sep 13, 2005 at 04:09 PM.
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Old Sep 13, 2005 | 03:25 PM
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Fight Nicely Children.....

In his defense... even if you install an FCD... the AFM signal will tell the ECU thats its getting more air, and thus the ECU will adjust with more fuel... but.. IMO its not safe over 10 PSI...
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Old Sep 14, 2005 | 12:25 AM
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All the information I gathered because I honestly didn,t know came from Mazdatrix and another main rotary builder.Could only assume their info would be correct as I had nothing to compare to.(Fricken mazda dosn,t even know!!)
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Old Sep 14, 2005 | 01:06 AM
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mazdatrix would not giev bullshit info,,,,
nor would a popular engine builder...

yes the afm coudl compensate for it... but there IS a reason why people blow their motors by putting a FCD on there and expect it to work!
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Old Sep 14, 2005 | 05:50 AM
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Originally Posted by slpin
ECU would NOT adjust fuel to 12psi IF THE FUEL CUT TELLS THE ECU ITS BOOSTING 7.5PSI ALL THE TIME

i suggest YOU study up on your car first
Please stop spreading misinformation!

The boost sensor does NOTHING to fuel delivery after the engine goes into + boost.
This is the same BS replies that a LOT of people used to tout when we first found out (by experimentation) that the stock ECU does jack to fuel delivery with the boost sensor.
Henrik (guys at RTEK) confirmed that there is NO FUEL ADJUSTMENT when the boost sensor goes over ~1.5psi.

So I'd suggest you should also study before making false claims.


-Ted
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Old Sep 14, 2005 | 05:53 AM
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Originally Posted by slpin
mazdatrix would not giev bullshit info,,,,
What info?

nor would a popular engine builder...
Who? BDC?


yes the afm coudl compensate for it... but there IS a reason why people blow their motors by putting a FCD on there and expect it to work!
It has NOTHING to do with the FCD.
Get it right - you're already wrong about the fuel delivery and boost sensor relationship.
I theorize that it's low voltage to the fuel pump that's causing most of the blown engines, NOT the FCD...
Ask the people who have killed their motors - the majority will tell you it was during nighttime with the headlights on...


-Ted
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Old Sep 14, 2005 | 03:59 PM
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Ted

YOU were one of the ones that have said you cant expect to bolt a FCD and expect everything to be fine. I got that information from YOU.

Feel free to look thru some of your 17.2k posts.

if you want to say i am wrong, I suggest you correcting some of your older posts before you start barking at me.
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Old Sep 14, 2005 | 09:52 PM
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Originally Posted by slpin
YOU were one of the ones that have said you cant expect to bolt a FCD and expect everything to be fine. I got that information from YOU.

Feel free to look thru some of your 17.2k posts.

if you want to say i am wrong, I suggest you correcting some of your older posts before you start barking at me.
I have NEVER blamed the FCD.
I think YOU should go reread my previous posts.
I've always defended the use of the FCD, against the majority of people who are against it.


-Ted
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Old Sep 15, 2005 | 12:02 AM
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Originally Posted by RETed
I have NEVER blamed the FCD.
I think YOU should go reread my previous posts.
I've always defended the use of the FCD, against the majority of people who are against it.


-Ted

I have TRIED searching for it to prove you wrong. But when you post what seems like a few hundred post a day, it is NEARLY IMPOSSIBLE to find something you have said years - or even months ago. I am sure you know that.

I did spot an error here or there on your part... such as...

Originally Posted by RETed
Was the engine fully warmed up when you tried to do this?
The stock ECU will prevent the car from revving that high when it's cold.


-Ted
Wont be long before EVERYONE says ECU will give you a 3-4k redline when the engine is cold.

And you are going to call them out for giving mis-information and claim you never said anything of such?
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Old Sep 15, 2005 | 12:03 AM
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Originally Posted by slpin
Wont be long before EVERYONE says ECU will give you a 3-4k redline when the engine is cold.

And you are going to call them for giving mis-information and claim you never said anything of such?
So what I said was false?


-Ted
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Old Sep 15, 2005 | 12:18 AM
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Holy flame hell. Ted, does the MAP have anything to do with timing as well, or is that AFM based also?
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Old Sep 15, 2005 | 06:36 AM
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Originally Posted by SonicRaT
Holy flame hell. Ted, does the MAP have anything to do with timing as well, or is that AFM based also?
Boost sensor just pulls timing out.
AFM signal also controls timing - the AFM is the primary load sensor on the vehicle.


-Ted
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