Question for spoolin/stou/experts...

[smp3000]

Ok guys,

From reading on this board you are obviously the most informed and educated about turbo'ing our cars.

Now, I have the BEGI kit sitting 2 feet next to me waiting for installation next week. As you know, the kit is still having it's feul system figured out. Right now the kit is set to 6psi, and runs well (maybe a little rich, but that all depends).:mad:

The kit was actually built to run at 8psi, but since then has been deemed 'unsafe" to run at that high of boost. The first fix floating around was to install the aux pump to get the feul psi we needed to run at 8psi.

Now FM and Corky have slowed down a bit and started testing many other ways of dealing with this issue. Corky told me to contact him in a month for much more info. I have no idea if he's planning on sending out the required parts to enable the kit to properly funtion at 8psi or not-once the come to a conclusion.

My question to you guys is:
How would YOU deal with this issue? What would you do/and/or buy to get this kit running at 8psi? Please keep in mind cost, and possible problems that might arrise when the task is at hand.

Basically-what's the most cost effective/efficient way of getting past this feul issue to get to 8psi?

 

[chdesign]

The best most cost effiecient way woudl be to get a sds additional injector controller and 2 more injectors. Full fuel tuning just about for a very reasonable price. www.sdsefi.com

 

[Stou]

That's a point chdesign. But since the Begi kit come with an FMU, maybe it's better to install the kit and run it at 6 psi while Corky is working out on the fuel problem.

If you decide to install an SDS controller with 2 extras injectors, you will have to modify the intake tube and weld 2 boss for those 2 injectors. After that, if you want to return to the FMU system, you will have to get a new intake tube or modify again the one you have. The SDS kit cost $325.

I think it's a better idea to install the kit and run it at 6 psi for a whille. If they don't find a good solution (I think they will....) you will have the choice of adding a new fuel pump or get and SDS kit and change your FMU system for an extra injectors system.

Even at 6 psi, you will find your car a lot more powerful and you will have the time to correct any minor problems like any kind of leak while they work on the kit.

 

[Keith@FP]

Personally, if I knew that the pros were working on it, I'd install it at 6 psi and wait to see what comes out of the research We'll have a solution. You knew you were buying a pre-production kit, and this is the sort of thing that happens.

2 more injectors is not going to stop the factory ECU from "correcting" the mixture. We've tried running an extra pair of injectors on some of our Miata kits and they just don't run well at all. If you're running extra injectors, run four.

Keith

 

[Stou]

I realy don't think that 4 extras injectors is needed on our car for low psi. I have 2 extras injectors on my car and my SDS controler is adjusted to 25% and this is more than enough. I think that 4 injectors for under 12 psi is useless.

We need something like the Link or the e-manage to correct the fuel and timing map in order to overide the ECU.

 

[Keith@FP]

Running four injectors isn't for maximum fuel delivery, it's for consistent fuel delivery. We've tried both twin auxiliaries and four auxiliaries for the Miata (at 9 psi) and found that the driveability is much better with an injector for each cylinder. It allows more precise fuel delivery.

Once you take the stock ECU out of the loop with regards to fuel, you lose your ability to get CARB certification - something we're planning on doing. Link makes a pretty wide variety of products, so "something like the Link" covers a wide range. Even the TurboLink simply modifies the stock ECU's decisions, and cannot fully compensate for any OBD-II corrections.

Keith