89 intake swap Before/After Dyno Results
#1
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89 intake swap Before/After Dyno Results
I finally found my disk with my dyno runs on them, and here is a overlying jpg of before the swap 89 intake swap and right after. Sorry for the size of the picture, I am at work and have little acess to programs to resize the image.
Mods at the time of dyno included: K&N cone filter, 6port sleeves removed and sealed off, stock exhaust manifold, bonez highflow cat, HKS catback.
The only change between the two was the addition of the complete 89 manifold.
Here is where I stand now, with the addition of RB headers, midpipe, TB mod, electric air pump, no a/c.
Carl
![](http://homepage.mac.com/carldavis/images/b4-after.jpg)
Mods at the time of dyno included: K&N cone filter, 6port sleeves removed and sealed off, stock exhaust manifold, bonez highflow cat, HKS catback.
The only change between the two was the addition of the complete 89 manifold.
Here is where I stand now, with the addition of RB headers, midpipe, TB mod, electric air pump, no a/c.
![](http://homepage.mac.com/carldavis/main/161rwhp.jpg)
Carl
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Originally posted by banzaitoyota
yeah!!!!! PROOF!!!
What procedure did you use to do the 89 intake swap?
Good Dyno info. thanks John
yeah!!!!! PROOF!!!
What procedure did you use to do the 89 intake swap?
Good Dyno info. thanks John
My Web Page
Carl
88 GXL
99 Dakota
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Originally posted by wpgrexx
wouold this be advantageous if you have no airpump and the ports are just wired open. would the increases be better than porting the 86 intake?
wouold this be advantageous if you have no airpump and the ports are just wired open. would the increases be better than porting the 86 intake?
As for porting the manifold, mazdaspeed7 claims big advantages to it, but he just grinds away at the manifold, I am sure if a flowbench was incorporated into the porting of the manifold, then gains could be seen. Do a search for that and see if anyone shows any results from his porting the manifold.
If the VDI was wired open, then you would loose quite a bit of torque. I also have a dyno run with the VDI shut and with the VDI open. I will see if I can post those.
Carl
88 GXL
99 Dakota
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#8
mad scientist
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I noticed more of a gain from porting my manifold than my full true dual exhaust. PP13bnos also ported his manifold, and says the same thing. But I still havent seen a before and after dyno.
I need to get my car on the dyno again. I have a feeling Im going to suprise quite a few people.
I need to get my car on the dyno again. I have a feeling Im going to suprise quite a few people.
#9
How many clicks were on your Series IV motor at the time of the Series V Intake swap? How many presently?
Wozzom suggested to me that his motor may have been tired (many clicks) at the time of the conversion therefore possibly negating the perhaps true effect of the swap of the Intake.
Wozzom suggested to me that his motor may have been tired (many clicks) at the time of the conversion therefore possibly negating the perhaps true effect of the swap of the Intake.
#10
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Originally posted by silverrotor
How many clicks were on your Series IV motor at the time of the Series V Intake swap? How many presently?
Wozzom suggested to me that his motor may have been tired (many clicks) at the time of the conversion therefore possibly negating the perhaps true effect of the swap of the Intake.
How many clicks were on your Series IV motor at the time of the Series V Intake swap? How many presently?
Wozzom suggested to me that his motor may have been tired (many clicks) at the time of the conversion therefore possibly negating the perhaps true effect of the swap of the Intake.
#11
I have just about the same on my rebuilt. On the previous thread https://www.rx7club.com/forum/showth...threadid=81656
I stated that I wanted to under go this conversion but was worried that I would have dissapointing results. Maybe I will re-evaluate this on my 88 GXL...
I stated that I wanted to under go this conversion but was worried that I would have dissapointing results. Maybe I will re-evaluate this on my 88 GXL...
#14
mad scientist
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Oops, I reall yneed to update my site. I decided not to sell it, I have too much money and time into it. I decided to just finish my ongoing project with it. Its getting a ported motor within a month, new exhaust, custom intake manifold, and in a few months, a custom sc setup with an intercooled Eaton M112. Im not going to give any details on the engine Im building, though. Ill let the dyno speak for itself.
#15
Eats, Sleeps, Dreams Rotary
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Originally posted by mazdaspeed7
Oops, I reall yneed to update my site. I decided not to sell it, I have too much money and time into it. I decided to just finish my ongoing project with it. Its getting a ported motor within a month, new exhaust, custom intake manifold, and in a few months, a custom sc setup with an intercooled Eaton M112. Im not going to give any details on the engine Im building, though. Ill let the dyno speak for itself.
Oops, I reall yneed to update my site. I decided not to sell it, I have too much money and time into it. I decided to just finish my ongoing project with it. Its getting a ported motor within a month, new exhaust, custom intake manifold, and in a few months, a custom sc setup with an intercooled Eaton M112. Im not going to give any details on the engine Im building, though. Ill let the dyno speak for itself.
Stop telling all of these secrets.
#18
Banned. I got OWNED!!!
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I have been told, and it is my experience, that anything more than a mild SP on a VDI intake will not yeild as much power as an s4 intake with the same port...in other words the stock VDI intake does not react well to porting the engine, changing the flow design of the intake and negating the VDI tuning.
FWIW, i have a spare VDI intake, actually 2, if anybody is interested.
FWIW, i have a spare VDI intake, actually 2, if anybody is interested.
#19
mad scientist
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Originally posted by hypntyz7
I have been told, and it is my experience, that anything more than a mild SP on a VDI intake will not yeild as much power as an s4 intake with the same port...in other words the stock VDI intake does not react well to porting the engine, changing the flow design of the intake and negating the VDI tuning.
FWIW, i have a spare VDI intake, actually 2, if anybody is interested.
I have been told, and it is my experience, that anything more than a mild SP on a VDI intake will not yeild as much power as an s4 intake with the same port...in other words the stock VDI intake does not react well to porting the engine, changing the flow design of the intake and negating the VDI tuning.
FWIW, i have a spare VDI intake, actually 2, if anybody is interested.
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