s4 wastegate mod
04-16-07, 08:50 PM
#1
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s4 wastegate mod
Hey guys, I saw the basic "bolt on" turbo upgrades for my s4. I am really low on cash right now, so I was thinking of jsut taking apart my turbo and getting the stock wastegate enlarged.
Who sells the bigger wastegate door so I can do it myself? I am aware the hole needs to be enlarged.
Is there any machining involved to put in 360 degree thrust bearings?
Who sells the bigger wastegate door so I can do it myself? I am aware the hole needs to be enlarged.
Is there any machining involved to put in 360 degree thrust bearings?
04-16-07, 10:28 PM
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I was looking at the BNR upgrades, and I saw the stock wastegate size compared to the ones they rebuild.
Is there anything I can do??? I want to get my car tuned very soon. Its got a street port, greddy FMIC, ss autochrom header, and a turbo back exhaust with a megasquirt ecu setup. Im getting 160 miles ona full tank!!
P.S> im aware rotaries will never get good mileage, but I know mine can be tuned a little better for reliability, some more gas mileage, and power
Is there anything I can do??? I want to get my car tuned very soon. Its got a street port, greddy FMIC, ss autochrom header, and a turbo back exhaust with a megasquirt ecu setup. Im getting 160 miles ona full tank!!
P.S> im aware rotaries will never get good mileage, but I know mine can be tuned a little better for reliability, some more gas mileage, and power
04-16-07, 10:33 PM
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Originally Posted by dean23
from what i know, porting the wastegate will just let it flow like the S5, and thats about it. but i could be wrong..
04-16-07, 10:46 PM
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Here is Aaron Cake's site... this is what I did:
http://www.aaroncake.net/rx-7/s4wastegate.htm
http://www.aaroncake.net/rx-7/s4wastegate.htm
04-16-07, 11:58 PM
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Originally Posted by dwb87
Here is Aaron Cake's site... this is what I did:
http://www.aaroncake.net/rx-7/s4wastegate.htm
http://www.aaroncake.net/rx-7/s4wastegate.htm
Does teh s5 turbo have the same size turbine? Im thinking about just getting a s5 housing from someone and bolting it on my s4 turbo.
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04-17-07, 12:24 AM
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Originally Posted by FCKing1995
Or an actual wastegate puck for $5 online and do it right. Waste of money to go S5 over S4. Just keep the S4 and port the WG
I was thinking of using a s5 housing because the guy I got my car from had put a tubular header made for a s5 turbo already. The turbo is a s4 though. DO you know how much bigger you port the stock 16mm wastegate?
04-17-07, 12:26 AM
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It would almost be easier to just purchase a s5 turbo. You can probably get a used one for $100 shipped from someone the forum. i'm running a stock s5 turbo on my car at 15psi and I'm putting ~250whp down currently.
04-17-07, 12:35 AM
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Are the s4 and s5 compressor sizes differnt though? Im just curious.
Im pretty new to the rx7 scene. I jsut got one for 1 week. I was suprised noone makes a tubulat manifold for the s4 turbo. What is the type of flange on a stock s4 turbo? I would consider making a manifold at work to try out.
Im pretty new to the rx7 scene. I jsut got one for 1 week. I was suprised noone makes a tubulat manifold for the s4 turbo. What is the type of flange on a stock s4 turbo? I would consider making a manifold at work to try out.
04-17-07, 12:56 AM
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Sorry for being such a newb. I jsut found out about this site http://www.fc3spro.com/main.html
04-17-07, 01:13 AM
#13
Originally Posted by idsigloo
It would almost be easier to just purchase a s5 turbo. You can probably get a used one for $100 shipped from someone the forum. i'm running a stock s5 turbo on my car at 15psi and I'm putting ~250whp down currently.
04-17-07, 01:28 AM
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Originally Posted by FCKing1995
Its easier to locate a used turbo and spend $100 than it is to port the wastegate and weld on a new puck? The guy said he has the tools to do it at work, so why not
04-17-07, 01:45 AM
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I did a quick search and only found this flapper
http://store.forcedperformance.net/m...ode=Acc-Gasket
not $ 5 , but im sure someone will link you with a cheaper option.
http://store.forcedperformance.net/m...ode=Acc-Gasket
not $ 5 , but im sure someone will link you with a cheaper option.
04-17-07, 01:58 AM
#16
Jesus, $35. I was thinking they sold new for cheaper. Not $5, I was exadurating a bit. Best bet might be bringing it to a local performance shop or turbo building shop, if you have any local. I had a local guy install me a larger puck from a different turbo he had laying around. only charged me $20 for part and labor (with consisted of a little grinding and a small weld to re attach the washer (the part on the end of the stem/neck to hold it onto the arm, and allows it to move and pivot) to the puck "neck" thing.
04-17-07, 02:29 AM
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Originally Posted by FCKing1995
Waste of money to go S5 over S4. Just keep the S4 and port the WG
04-17-07, 10:46 AM
#19
Originally Posted by NZConvertible
The S5 turbo's biggest advantage is the fully divided manifold set-up, which improves turbo response and reduces lag. Given how cheap thay are, and the fact that you can sell the S4 turbo, it's not a waste of money.
