Gun

I got a question- What are the pros and cons of sequentials vs non-sequentials or visa-versa?

Thanks Gun

kwikrx7

Sequentials

Pros: quicker spool up at low speeds
that's it
When they are working - it is a very nice set-up

Cons: Rat's nest of vacuum lines and solenoids that fail eventually somewhere
The changeover sequence is very complicated and only takes one tiny hose pop-off or slight error and you'll get no boost
Trying to find out where the problem is.

Non-sequentials:

Pros: Eliminates all but 4 or 5 vacuum lines and all solenoids
more midrange and top-end power and torque
Better for reliability

Cons: Slower spool up - somewhat laggy until about 3500 rpms and then it pull HARD - no changeover

It's a tradeoff of lowend for midrange and topend power - once you get it you won't like it - until you get used to it - then you'll love it. Everyone I've seen on this forum said they would never go back to sequentials. I had mine done for about $85 since my engine was already out. It seems to work better with a hi-flo cat over a midpipe - even more torque.

Mudd

I did a quick search, but wasn't able to come up with much, so I ask the question - What's involved in switching the car over to non-sequential? Being a bit of a newbie, I always thought one turbo was smaller than the other in most sequential set-ups (including FD's) - wouldn't that be detrimental to the turbos? I'd also imagine additional fuel would be a must if you went non-sequential.

If someone could direct me to a URL or something along those lines, I'd appreciate.

Thanks!

weaklink

the turbos are the same size

here is the link: http://www.scuderiaciriani.com/rx7/non-sequential.html