89-91 intake on 86-88????
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89-91 intake on 86-88????
Is it possible to put the 89-91 intake manifold on a 86-88 engine? Is there any advantages if it is possible?
Also Why cant I turn my timing CAS ???
-Daryl
Also Why cant I turn my timing CAS ???
-Daryl
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yeah I sure did, every time I change something under the hood wether it be plugs, oil, air filter configuration etc...I always loosen the 10mm bolt and try and turn my CAS EVERY TIME!!! but it wont budge...Do I need a special tool to turn it with?
-Daryl
-Daryl
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Damn Along with the throttle body mod and a 89 intake you can give a 86-88 rx7 20 more HP! Alone the cleaning and polishing of everything your gonna notice this mod!
Sounds like fun to me.
-Daryl
Sounds like fun to me.
-Daryl
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#9
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Originally posted by silverrotor
I've heard that you actually lose HP after conversion to a Series V Intake swap but you gain It back at 7000 rpm.
I've heard that you actually lose HP after conversion to a Series V Intake swap but you gain It back at 7000 rpm.
#10
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Originally posted by NZConvertible
That would be because there's no way for the S4 ECU to activate the VDI. In the above example the VDI has been locked in the high-rpm position, which would cause some loss of low- to mid-range power.
That would be because there's no way for the S4 ECU to activate the VDI. In the above example the VDI has been locked in the high-rpm position, which would cause some loss of low- to mid-range power.
I too was going to undertake this mod myself prior to hearing first hand of his experience. I went all out, getting the Upper/Lower Intake, Dynamic Chamber, 6 Port Actuators and all the freakin new gaskets from the dealership. I even bought an RPM Switch from Summit and cleaned up the Intake to pristine condition! Now, It sits In my garage collecting dust. I have been on this website: http://homepage.mac.com/carldavis/intake/intro.html
but don't know, for example, how well his setup Is working for him.
#12
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It's amazing how many times my old S5 intake on an S4 engine writeup pops up in posts... memories...
FOR THE RECORD:
I was the one who wrote the information posted on http://homepage.mac.com/carldavis/intake/intro.html
I wrote that page immediately after I performed the swap on my old 86 block about 2 years ago. The writeup is hosted on that site because my website was taken down.
Since that page was posted so long ago, I've have had a lot more time to test and verrify the 10 HP gain on a S4 engine with the S5 intake. I'll tell you strait up: Its not worth the effort and the gain is not there.
Does the S5 intake give an S4 block more total HP? Yes. BUT the HP is only realized on the top end above 6000 RPM. The gain was about 8 HP at 7000 RPM
With this mod, you will lose low end? Yes. Down low, below 4000 RPM you will loose about 10 HP and 8 ft/lbs torque across the board.
TO DO THIS RIGHT? You really need the 89-91 NA block with the S5 rotors. The extra compression and lighter weight rotors make up for the 10 HP loss down low.
The only problem I have now with an entire S5 block in my 86 is that the stock ECU is running way to rich. My next step is the S-AFC to lean things out across the power band.
FOR THE RECORD:
I was the one who wrote the information posted on http://homepage.mac.com/carldavis/intake/intro.html
I wrote that page immediately after I performed the swap on my old 86 block about 2 years ago. The writeup is hosted on that site because my website was taken down.
Since that page was posted so long ago, I've have had a lot more time to test and verrify the 10 HP gain on a S4 engine with the S5 intake. I'll tell you strait up: Its not worth the effort and the gain is not there.
Does the S5 intake give an S4 block more total HP? Yes. BUT the HP is only realized on the top end above 6000 RPM. The gain was about 8 HP at 7000 RPM
With this mod, you will lose low end? Yes. Down low, below 4000 RPM you will loose about 10 HP and 8 ft/lbs torque across the board.
TO DO THIS RIGHT? You really need the 89-91 NA block with the S5 rotors. The extra compression and lighter weight rotors make up for the 10 HP loss down low.
The only problem I have now with an entire S5 block in my 86 is that the stock ECU is running way to rich. My next step is the S-AFC to lean things out across the power band.
#13
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There you are wozoom! I knew you were going to come around to FINALLY PUT THIS TO REST!
I didn't want to bait up your name and have everyone Interested In this conversion to bombard your pm's.
I very much wanted to do this b'c I thought It would be cool to have better Intake runners and a VDI that Is setup on the dial.
Besides learning this Is not a practical mod, I learned that with the old EGR Solenoid that I have acquired and the new RPM Switch that I may be able to use It to dial In my 6 ports via electronically.
Anyways, I'm glad this mod has been put to rest...
I didn't want to bait up your name and have everyone Interested In this conversion to bombard your pm's.
I very much wanted to do this b'c I thought It would be cool to have better Intake runners and a VDI that Is setup on the dial.
Besides learning this Is not a practical mod, I learned that with the old EGR Solenoid that I have acquired and the new RPM Switch that I may be able to use It to dial In my 6 ports via electronically.
Anyways, I'm glad this mod has been put to rest...
#15
Originally posted by silverrotor
have been on this website: http://homepage.mac.com/carldavis/intake/intro.html
but don't know, for example, how well his setup Is working for him.
have been on this website: http://homepage.mac.com/carldavis/intake/intro.html
but don't know, for example, how well his setup Is working for him.
My car is currently making 161 and if I remember correctly, 127ft/lbs of torque at the rear wheels with 70k on a Mazda reman engine. My only other mods are a K&N filter, RB headers, midpipe and a 50mm HKS Sport Exhaust.
So, it is working beautifully for me. I have had a few people say that the swap worked for them, but a few others say that it didn't work for them.
I just moved so I will have to find them, but I will post my dyno runs right before the swap and right after the swap so you guys can compare where you loose and where you gain power.
For those that can wait, I will be running the Mazda Drivers School at VIR at the end of Sept, you can see my setup.
Carl
88 GXL
99 Dakota
#17
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Carl,
Your dyno sheets were the ones that convinced me to do this swap in the first place, so I don't doubt that your setup is working. What I haven't been able to figure out is why we have mixed results on different cars. So far I've only met 3 people that have seen gains across the powerband, while 6 people have seen mixed results with only gains on the top end.
As far as I know, our setups are very similar except that I still run a cat on my car.
What are you using for 6-port and VDI operation? RPM switches and the airpump?
Your dyno sheets were the ones that convinced me to do this swap in the first place, so I don't doubt that your setup is working. What I haven't been able to figure out is why we have mixed results on different cars. So far I've only met 3 people that have seen gains across the powerband, while 6 people have seen mixed results with only gains on the top end.
As far as I know, our setups are very similar except that I still run a cat on my car.
What are you using for 6-port and VDI operation? RPM switches and the airpump?
#19
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Originally posted by red xeven
what about using the intake mainfold from a third gen? Would you gain, or lose any more power?
what about using the intake mainfold from a third gen? Would you gain, or lose any more power?
#20
Originally posted by wozzoom
Carl,
Your dyno sheets were the ones that convinced me to do this swap in the first place, so I don't doubt that your setup is working. What I haven't been able to figure out is why we have mixed results on different cars. So far I've only met 3 people that have seen gains across the powerband, while 6 people have seen mixed results with only gains on the top end.
As far as I know, our setups are very similar except that I still run a cat on my car.
What are you using for 6-port and VDI operation? RPM switches and the airpump?
Carl,
Your dyno sheets were the ones that convinced me to do this swap in the first place, so I don't doubt that your setup is working. What I haven't been able to figure out is why we have mixed results on different cars. So far I've only met 3 people that have seen gains across the powerband, while 6 people have seen mixed results with only gains on the top end.
As far as I know, our setups are very similar except that I still run a cat on my car.
What are you using for 6-port and VDI operation? RPM switches and the airpump?
Well, I now have a cat back on my car, where I moved they are a little more strict on checking emissions requirements.
The 6 ports are removed and blocked off, the VDI runs off the air pump hose that sits between the exit of the air pump and the entrance to the air control valve, running through the factory vacumme spider to the EGR soleniod (contolled by an RPM switch) to the VDI actuator.
I have the actual Dyno run files and a viewer program, so I am going to overlay the before and after runs to see exactly what was gained and what was lost and where.
Carl
88 GXL
99 Dakota
#21
Originally posted by red xeven
what about using the intake mainfold from a third gen? Would you gain, or lose any more power?
what about using the intake mainfold from a third gen? Would you gain, or lose any more power?
Carl
88 GXL
99 Dakota
#22
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won't work at all, as a matter of fact (as has already been stated) -- 3rd gen engines are turbo motors, and they have 4 ports. 2nd gen NA engines have 6 ports, an the manifolds, etc. are waaay different. You'd end up running off (just a wild guess ) the intake port in the intermediate housing
#23
Originally posted by Silver88GXL
I just moved so I will have to find them, but I will post my dyno runs right before the swap and right after the swap so you guys can compare where you loose and where you gain power.
I just moved so I will have to find them, but I will post my dyno runs right before the swap and right after the swap so you guys can compare where you loose and where you gain power.
89 intake swap dyno results
Carl
88 GXL
99 Dakota