Single Turbo RX-7's Questions about all aspects of single turbo setups.

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Old Jan 1, 2007 | 03:01 PM
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How reliable do you guys think a FD with the apexi RX6 kit and mildly streetport be over an Evo with bolt ons? The story is my talon i drive now is not very reliable and i bought it as a daily driver, well that didnt work lol. So now im thinking of getting this guys FD sooner but my friends think i should get an evo and do some bolt ons to it, but im a huge rotor guy ive owned two fc's and they were reliable but they also had no power either?
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Old Jan 1, 2007 | 09:17 PM
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The higher the boost, the less reliable it will be. That's not a huge turbo, it won't make much more power than stock twins are capable of (assuming this is the most common non-b series rx6) but it will spool like a mother and be pretty bulletproof. If the rest of the car is in good order and set up correctly and you keep the boost reasonable (like 12ish psi) then there's no reason it can't be reliable.
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Old Jan 1, 2007 | 09:41 PM
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Thanks for the help with that. What do you think would be a good whp range for the reliability with that? And what do you think the barrier is going to be with that?
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Old Jan 1, 2007 | 11:07 PM
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Originally Posted by rx73rotorj
Thanks for the help with that. What do you think would be a good whp range for the reliability with that? And what do you think the barrier is going to be with that?
My dad has been running his FD at the 300 rwhp level for almost 50,000 miles now with zero problems.

Realistically, you could probably push it to 350ish rwhp with that apexi turbo and expect good reliability *assuming that the car is built properly.* With these cars, I don't see that very often anymore unfortunately
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Old Jan 2, 2007 | 12:54 AM
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Apexi = Solid

Originally Posted by GoodfellaFD3S
My dad has been running his FD at the 300 rwhp level for almost 50,000 miles now with zero problems.

Realistically, you could probably push it to 350ish rwhp with that apexi turbo and expect good reliability *assuming that the car is built properly.* With these cars, I don't see that very often anymore unfortunately
Firstly, having an NA FC is a completely different beast then a single turbo FD. (I have owned a few NA FC's too and I never had an engine issue with either of them.) The FD is a different story, while I have been fortunate last year, expecting a single turbo rx-7 at 15 psi to make it more then a few years without a major issue, is probably foolish.

Depending on your port and tune, you could make 330-350 all day running around 12 pounds. I sent my Rx6 to the dyno and max power ended up being 372rwhp at about 13.8psi.

If you really are satisfied with keeping the power between 330-390, the Apexi would work for you. The IHI turbo's are very strong from what I have read. You would probably only have an issue if you oil starved one, or put a seal through it. It has been said that Apexi didn't offer a BOV with the kit because they say it doesn't need one. (I run one anyways.)

If you want to see the full dyno sheet it can be found: Dyno Thread

Good luck!

-R4tw

P.s. Remember, water injection is your friend if you prefer the reliability over the 20-25hp it will suck up!
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Old Jan 2, 2007 | 01:42 AM
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Thanks guys for the info appreciate it so it looks like the FD single turbo is what im choosing over the bolt-on Evo.
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Old Jan 2, 2007 | 08:41 AM
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Originally Posted by rx73rotorj
Thanks guys for the info appreciate it so it looks like the FD single turbo is what im choosing over the bolt-on Evo.
Before you choose it, take it to a reputable rotary shop to have them look the car over, test drive it, and get a compression check. You'll be sorry if you don't, seriously.
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Old Jan 2, 2007 | 12:50 PM
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The guy im buying it from says it has a one year warranty on the engine and he makes motor mounts for gotham racing so i dont think hes gonna screw me over. Do you know where i can get a rotory compression checker cause i dont think the piston ones will work?
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Old Jan 2, 2007 | 06:19 PM
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Originally Posted by rx73rotorj
The guy im buying it from says it has a one year warranty on the engine and he makes motor mounts for gotham racing so i dont think hes gonna screw me over. Do you know where i can get a rotory compression checker cause i dont think the piston ones will work?
I'm one of the owners of Gotham Racing. PM me his username on the forum and I'll confirm if it's true.
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Old Jan 2, 2007 | 07:38 PM
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you still work for gotham? didnt know that since you moved out east



as for reliable as an evo? no, the evo motors are pretty damned bulletproof
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Old Jan 2, 2007 | 10:02 PM
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Originally Posted by Node
you still work for gotham? didnt know that since you moved out east
Basically a silent partner at this point, not involved in day-to-day stuff since as you mentioned I live on the other side of the country
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Old Jan 3, 2007 | 12:47 AM
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The 4G in my opinion is probably the greatest or one of the best 4 bangers around, just dont know if i could ever get around the engine sitting the wrong way

I beat the hell out of my car and the engine i built for the last year, into the 11's, i still get 105-110 on all rotor faces with used housings, I do think a well built rotary most importantly good tuning and no tuning messups are the key though

jsut get a wideband and good eng. management and be careful tuning, and you will have no problems, i expect my engine to easily survive a full season next year running into the 10's at about 20psi on my large turbo now, oh yeah this engine was built with 9.7-1 high-comp rotors running on pump 90 with no problems whatsoever
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Old Jan 3, 2007 | 10:01 AM
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All i know about him is his name is Dan and he has a silver FD he is building up and his red FD is for sale.
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Old Jan 3, 2007 | 10:02 AM
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Him and his friend i work with both say its a steal he just had a kid so he dosnt really want it anymore.

Last edited by rx73rotorj; Jan 3, 2007 at 10:05 AM. Reason: New Words
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