Im debating on which way to go, single or keep stock twins. I would like to keep the stock twins but am not sure how much power they can handle. What do you guys think of single vs twins? I am wanting to reach 350-450hp MAX. Which way should I go and why? Any helpful info would help!

 

Obviously you have an FD(stating your car gets better answers,quicker).
I can't see those numbers with "Stock twins",but I am an FC guy so hopefully Sgt Blue or other Fd guys will see if they can shed some light on it..

 

Yeah I just assumed ya knew what I was talking about by saying keep the stock twins" but hey, that's why I'm always asking questions! Anyway thanks for the help, now I can really get started doing my homework

 

Wouldn't it lag with the stock twins though?

 

The short answer is that you'll need to go single. To make your hp goals, you'll need to turn up boost alot beyond stock levels (10 psi). The stock twins start running out of breath around 12 psi and begin making alot of heat. You'll also need supporting mods...cooling, fuel (pump, regulator and injectors), an efficient intercooler, and a programmable stand-alone. Probably need ignition amplification and I'd also recommend you look into auxillary injection.

 

What?
The stock sequential twin-turbo system was specifically designed to minimize lag. The primary turbo comes on line almost immediately... read, almost no lag. It has it's limits and is finicky 20+ year old technology, but still pretty impressive. .

 

Sgt Blue, I see what you mean. The stock twins can't handle much move than 10 psi, causing them to heat up. The more I read into it the more likely single is the way to go, I'll need to update the cooling and fuel systems to account for the air intake and more aggressive combustion that I'll be getting from the porting job I'm probably going to end up doing as well. Can you tell me more about the auxiliary?

 

Basically it refers to injecting either water or methanol alcohol, or a mixture of both somewhere into the intake tract (pre-turbo, post-turbo/pre-intercooler or post-intercooler/pre-throttlebody). The underlying objective is cooling. Methanol is best at cooling intake air while water is best at cooling the combustion chamber. Which one and which mixture and location of the nozzles, along with the level of sophistication of the delivery system is dependent on the goals and hp levels sought...along with your budget. It can range from simple inexpensive boost-activated water-only systems to very sophisticated and relatively pricey progressive multi-nozzle systems. With your stated hp goals you're going to be asking alot of a 1.3 liter engine. These systems can make it alot more reliable.
Go here and begin by reading the stickys. There are alot of them but alot of info.....
---> Auxiliary Injection - RX7Club.com

 

Awesome, I didn't realize it could make that much of a difference. I appreciate it, I'll get back to you after I read into this later.