RotaryShack Shop in Chatsworth, CA specializing in engine building and 1st generation RX-7's.

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Old Jul 17, 2006 | 03:36 PM
  #276  
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From: troy mo
I need omp help what do i need to get rid of the omp and make my 3gen auto still run right?
Old Jul 18, 2006 | 08:47 PM
  #277  
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From: HONDURAS
88 rx-7 stalling problem

I have a problem with a 88 2nd gen 6 port rx-7, the engine has been freshened up with new seals, the problem is that it starts right away but the idle speed is to high(2600 rpms) and after a few seconds(30 seconds or more) it starts falling down on the rpms till it stalls. any ideas of what could be causing this problem, aside from this the engine works fine accelerating all the way to redline with no problems,
Old Jul 18, 2006 | 09:27 PM
  #278  
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From: chatsworth,Ca.
Originally Posted by juantii
I have a problem with a 88 2nd gen 6 port rx-7, the engine has been freshened up with new seals, the problem is that it starts right away but the idle speed is to high(2600 rpms) and after a few seconds(30 seconds or more) it starts falling down on the rpms till it stalls. any ideas of what could be causing this problem, aside from this the engine works fine accelerating all the way to redline with no problems,
try adjusting the idle mixture screw(located on the pass strut tower near the air flow meter) .. lower the initial start up idle settings so it jumps up so high at first
Old Jul 29, 2006 | 07:00 PM
  #279  
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From: kidnap county
holley 4bbl on a 12a

i need to know what vacuum lines i need to hook up and where. also any advice would be kind thanx.
Old Jul 31, 2006 | 10:07 AM
  #280  
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From: Lost!
Robert, what do you recomend fuel pressure should be at idle? I have mine set at 5psi and noticed that sometimes it drops after the engine is warmed up. My vac/boost source is tapped on my carb hat as you know.

Thanks, Ed
Old Jul 31, 2006 | 11:30 AM
  #281  
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From: chatsworth,Ca.
Originally Posted by 13BTOY
Robert, what do you recomend fuel pressure should be at idle? I have mine set at 5psi and noticed that sometimes it drops after the engine is warmed up. My vac/boost source is tapped on my carb hat as you know.

Thanks, Ed

have you tried taking the vac signal from the intake manifold? 5 psi is good fuel pressure for idle ed...
Old Jul 31, 2006 | 12:00 PM
  #282  
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From: illinois
Robert,
When changing to a GSL-SE rear end, What brake line components (other than the caliper ones) do I need to remove to use on my GS?
Old Jul 31, 2006 | 12:28 PM
  #283  
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Originally Posted by Kim's FB
Robert,
When changing to a GSL-SE rear end, What brake line components (other than the caliper ones) do I need to remove to use on my GS?
kim, you will need the parking brake cables, and the rubber line that goes from the rear end to the chassis (frim the GSL-SE to get the brake system to adapt to your car.. dont forger the porportioning valve up fron too, you will need to use the one from the SE also to get the brake byast where it needs to be..
oh, on another note, i can have any size venturi made for your weber, just let me know ....
Old Jul 31, 2006 | 12:43 PM
  #284  
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From: illinois
Cool! thanks for that info. I will swap all that out. Glad I asked!

Yes please hook me up with some 38's and let me know price on those.

Thanks Robert.
Old Jul 31, 2006 | 09:30 PM
  #285  
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From: Lost!
Robert, I'll give that a try.


Thanks, Ed
Old Aug 1, 2006 | 03:20 PM
  #286  
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I am wanting to know if you think it would be wise to drill and tap my front cover on my 83 GSL while it's still in the car. I really don't want to have to pull the oil pan and front cover if I don't have to. I have 90% of my 12AT mocked up, and this is what I'm coming down to. Thanks.
Old Aug 5, 2006 | 02:35 PM
  #287  
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fuel pump cut relay

Originally Posted by 680RWHP12A
any questions? ask here and you will get help!
Hi

i have an 85 GSL, i am trying to identify and replace the fuel pump cut relay.
Can you tell me how to identify this relay. I understand that it is under the dash above the break peddle or kind of behind the speedometer and tack. I have gotten up under the dash and seen the wireing and relays but not sure exactly which one to remove. I was also told that I needed to pull the steering wheel out to get to it, but I am not sure if this is the best way to get to it? I called the Mazda dealership and they can order the part, $70, so I want to test it to make sure ths is my problem before ordering the relay. any help would be appreciated.

thanks
jef
Old Aug 5, 2006 | 10:55 PM
  #288  
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From: tn
all i need to know is what engine swap will go great and be fairly simple in my 1990 rx7 non turbo
Old Sep 2, 2006 | 08:43 PM
  #289  
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From: The Netherlands
Friends i got a question.

I am looking for years to find a original mazda R100 overrev switch to trigger the overrev buzzer behind the dash.
My question is: is there a other kind off device from any car i can use to make my buzzer work again ?

Maury.
Old Oct 10, 2006 | 03:31 PM
  #290  
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From: tx
hi there i have a 1gen i had work done to it can you tell me what fuel pump i can use it runs out off fuel when im going at HI rpm 2 to 3 gear ENGINE 12A
here is what i got done
# 1 monster street port
#2 J-birdge
#3 holley 650
#4 turbo T-3 T-4
Old Oct 10, 2006 | 11:58 PM
  #291  
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Hey, guys quick question for ya. I am racing a 1979 rx7, with an 85 13b running dual weber 32's. Works quite well, but here is the rub, weber 32's, at least the ones I am using don't have a vacuum port to run to the vacuum advance. Any ideas? Loosing a lot of HP not running the advance.
Old Oct 16, 2006 | 04:43 PM
  #292  
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From: Des Allemands, Louisiana
Robert, I saw the 89-91 turbo manifolds that you sell on your website, and I was wondering how big you port the internal wastegate.

How effective is it at stopping boost creep at ~6PSi?

Also, do you have any S5 turbos in really good condition?
Old Oct 18, 2006 | 03:19 PM
  #293  
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From: Des Allemands, Louisiana
Rob?
Old Oct 23, 2006 | 03:47 PM
  #294  
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From: Des Allemands, Louisiana
Originally Posted by clean85owner
Robert, I saw the 89-91 turbo manifolds that you sell on your website, and I was wondering how big you port the internal wastegate.

How effective is it at stopping boost creep at ~6PSi?

Also, do you have any S5 turbos in really good condition?
Old Oct 26, 2006 | 07:21 PM
  #295  
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what turbo to buy

i have a 1986 on its 3rd motor its only got 25,000 on it as of now transmittion as well so if it is a non turbo what parts will be needed to upgrade to turbo and which turbo?
Old Oct 31, 2006 | 03:00 AM
  #296  
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From: phoenix, az
i have a 1988 gtu NA 13b and i was wondering what are the best possible hp and torque gains are for the money without resorting to a 13bt engine swap ( that's in the future sometime, when i have the money to spend to do it right)
Old Oct 31, 2006 | 03:04 AM
  #297  
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From: phoenix, az
Originally Posted by Gresco
i have a 1986 on its 3rd motor its only got 25,000 on it as of now transmittion as well so if it is a non turbo what parts will be needed to upgrade to turbo and which turbo?
ive been told that youll need the 13bt engine, tubo tranny, drive shaft, rear diff, flange, ecu, harness, and more. keep in mind, this is for the 13bt engine swap, not a bolt on turbo kit. anyone, correct me if im wrong...im still new to the fc world.
Old Nov 1, 2006 | 02:48 PM
  #298  
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whats up robert. i bought a 45mm OER from you a little while back and i was just curious if its boost prepped already, if not what is needed to boost prep your OER's?
Old Nov 1, 2006 | 03:27 PM
  #299  
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From: chatsworth,Ca.
Originally Posted by Sgt.Stinkfist
whats up robert. i bought a 45mm OER from you a little while back and i was just curious if its boost prepped already, if not what is needed to boost prep your OER's?
hey, man how are you? that oer is ready for boost sir
i will give you a killer deal in a carb hat too, pm me for a price
Old Nov 1, 2006 | 03:28 PM
  #300  
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From: chatsworth,Ca.
Originally Posted by clean85owner
Robert, I saw the 89-91 turbo manifolds that you sell on your website, and I was wondering how big you port the internal wastegate.

How effective is it at stopping boost creep at ~6PSi?

Also, do you have any S5 turbos in really good condition?
there is no wastegate in the exhaust manifold silly
its part of the turbo

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