so i have a 1993 RX-7 i purchased with a well worn engine 130+ on it i have had it for a yeah and then it decided to go kaput. i took my car over to MZM INTERNATIONAL and had get me a new rotory from mazda. while i was at it they did all the reliablility mods that the jackass who had it before never did! Along with a new engine harness hoses basically the works.i am currently breaking in the new engine i have some mods done to it as well thaks to mzm i had the stock 93 twins replaced with new 99 RZ twins as well as a full 3 inch exhaust running test pipe i have a walbro fuel pump hks twin intake sys,Act Heavy duty clutch cant touch the greddy boost controler yet of course,greddy bov, all i really need to do is higher flow injectors and a apexi power fc and commander. my question is how much hp to the ground do yall think i am making now. since i cant go WOT just yet![IMG]http://

 

All the money you spent so far, I'm sure you can afford a few dyno runs. Why don't you just wait, do the dyno run, no guessing on hp.

 

well its not the dyno runs that concern me its breaking in the engine first i just dont have enough time to take on long enough drive to break everything in yet for dyno runs

 

I would get the PFC before any dynoing.

 

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How much boost are you running?

 

My strong advice:

Put your stock cat back on until you get the PFC and can have it tuned. I hope MZM ported the wastegate before they installed those turbos. If not, you are likely going to have to run a restrictor plate with the midpipe after you reinstall it. I HOPE someone at MZM explained this is to you.

If you are planning on upgrading the injectors soon, it was INSANE that this wasn't done during the engine rebuild. Now you've got a few PITA hours ahead to upgrade the injectors when it could have been done for free and little trouble with the motor out.

In any case, keep it at 10 psi and under (if you can), until you get the PFC AND have it tuned. Steve Kan at Gotham Racing should be able to tune it for you at their shop, which is pretty close to you.

 

So you had this car for a year, and you call the previous owner a jackass because the reliability mods on the car were never done? Dude you had the car for a year... All you had to do was open the hood and and look when you bought it.

Since your car died at 130K+ the previous owner must have done something right

 

As usual, Rynberg smacks the nail on the head.

I want to emphasize that you *need* to keep it under 10psi or else your new motor will pop for sure. If your wastegate isn't ported, a full exhaust will cause your boost to go higher, and the boost controller won't be able to do anything about it. I agree that if your boost doesn't stop at 10psi, you should install the stock cat or consider adding some other restriction to the exhaust.

If your boost goes higher than 12psi for any reason, you are really risking blowing that brand new motor. That's the hard limit for a stock ECU and injectors.

When you get the PFC the same issues will exist - with a full exhaust you have to be careful that your boost can't/won't/doesn't exceed the boost that the PFC was mapped for.

Dave

 

alright guys thanks for the info very helpful