tssteph

a friend has it on his skater, works awesome.

2112

No racing, just performance driving, like all you guys

I have always assumed these were contiuously tuned by the computer reading the sensors and adjusting fuel flow. I also assumed that they were great around a dock, you know no stalling or loading up(EFI).

I have 600 inch motors, max HP at 6300 rpm. Kinsler said they design the sizing and injectors to fit the application. I can easliy make flame arrestors out of the air cleaners shown above. The price includes all the computer and sensors )no Laptop though.

All Feedback appreciated. Tssteph, is that a Kinsler set up? Does he run a flame arrestor?

bcarpman

It's not the injectors that are different on this setup, it's the throttles. Having individual throttles on each cylinder will give better throttle response when that is a big issue (motorcycle racing - yes, Going fast in a straight line - not so much), but you have to match them up perfectly. It doens't matter how well the injectors are matched up, if the airflow is different into each cylinder.

When the throttle is in front of the plenum like on any Merc FI motor, there isn't any real potential for big airflow differences (if the manifold is designed right). Port throttles WILL NOT make any more power than a cheaper and easier to setup plenum throttled setup.

Also, a port throttled setup has to be controlled based on throttle and rpm (there inherently is no MAP signal). Plenum throttled engines are controled with a manifold pressure vs. RPM mapping. MUCH more flexible and easier to tune. You can add a MAP sensor to a Throttle vs. RPM setup to correct for barometric conditions, but it's always a guestimate, and never works as good as you'd like it to.

I'd also guess that those filters are probably a compromise, and aren't the best for airflow into the bells (but I could be wrong on this)

Again, Yes it looks REALLY cool, but you're not going to go any faster, it'll cost more, and will be more trouble to tune and keep tuned in a variety of conditions.

So first you really need to decide your goals. If looking cool is what your after, you have to ask yourself how cool it's going to look after you put those filters on top of the stacks.

Then you need to decide what other complents you're going to use. Figure out about how much power you're going to make and what RPM you want to make it at. Once you figure that out, you can pick an intake manifold/throttle choice.

Then as a separate issue, you decide what computer system you want to use. That's based on a number of factors, but usually based on who's going to do the tuning for you (they'll have the best results with a system they are familiar with).

Hope that helps

2112

Thanks bcarpman.

OK I feel bay for wanting my eye candy

You are right, what I run now (Dominators) are not broken but they too need adjustments and maintainance.

For the sake of discussion, lets follow it out a little more.
Kinsler told me that after I give them all the data on my engines, down to the specific flow #s, cam, bore/stroke, etc, etc. They will optimize the throttle size as well as the injectors. My engines are blueprinted to the point where the two only varied by 2HP at 6350rpm so It seems logical to me that they should be able to nail down the combo. (tell me why my reasoning is faulty if I am off as you obviously know more than me on this). They also said we could locate MAP sensors into the airbox which I assume includes the aircleaner assemblies. Heck I have a BMW which does it nearly this way.

If everything is with in say 2% port to port and the oil/water temp sensors, MAP sensors and O2 sensors are sending data at millionths of a second, won't the computer constantly adjust ratios and ignition timing keeping everything optimal?

Again, set me straight. I am needing a bit more understanding as my impressions are obviously different than what you are telling me.

Nova 26

If you were putting this set-up on a car, yes. On a boat i've never seen a place to mount an o2 sensor. Without that, you can't fine tune the a\f ratio with the computer very well.

tssteph

with the setup in the pictures there is not a O2 sensor, the setup is from the early to mid 90's and is a Kinsler setup and still works awesome. Starts up idles cold, no stalling. It does us what looks like a map sensor and also what looks like a air temp sensor on the manifold. My guess is there are fule maps based on temps and MAP pressure that are adjusted as needed. This setup was originally setup and installed/configured by Eikert. Looks great and runs great.

TylerCrockett

iTrader: (1)

Are you running a single dominator or twins on a tunnel ram intake. I would replace the carbs with throttle bodys and put injectors in the runners and a Mefi 4B ecu and wiring harness.

2112

I have both single dominator and tunnel ram manifolds. Currently running a single 1250. I have thought of this method too (throttle bodies on manifolds).

My stellings were made with a O2 sensor bung in the collector.

2112

What about individual port tuning as mentioned above? Flame arrestors?

tssteph

Not sure, no flame arrestors right now.