Triple Webbers VS Standard?

[Datzun76]

I am considering switching over to triple webbers from the standard fuel injection I have now. Is there really much difference in horsepower or is it about equal?

My injectors seem to get clogged to easily as I had them cleaned out and the car ran great for six months but now lags bad again before I had the injectors cleaned.

So should I replace all the injectors with new ones or just get the webbers which I have priced from another party at $500?

[240znz]

Have you any experiance with triples? If not then you are in for a lot of time tuning and getting them setup just right. Your mileage will most probably drop and the reponse at low RPM will be worse.

Saying that, the induction tone is delicious at you will probably get more poke at higher RPM's.

It's the same ol' question I'm afraid. Is this car a DD or weekend fun car? Take a honest vote on how you drive the car. If it's hard all the time them triples and a cam are for you. If you want something that has great all round drivability...stick with FI.

The cost of fixing the FI system will be far less vs triples (you need the manifold, filters, initial tuning).

Just my 2 pence....corrections welcome.

[ZmeFly]

everyone talks about bad low end response. maybe its just with the webers but my dell ortos never had that problem and i was well when not into all 6 barrels wast getting good mileage

i think there good, but i dont see why you would want to leave fuel injection for carburetion. like the man above said if you dont have experience then your in for trouble.

also if your still basically stock then i wouldnt suggest it at all.

stick the with injection

[Ivan]

Injection will use less petrol than triples. I talked to a z engine specialist about this once and he seemed to think injection would give 5% more power than the triples would (from stock) so if anything there will be more power but probably nothing noticeable other than on you pocket.

However you'll loose that carbed engine sound

[Ivan]

opps misread your post, I thought you were going from carbed to injection

[carguyinok]

(My injectors seem to get clogged to easily as I had them cleaned out and the car ran great for six months but now lags bad again before I had the injectors cleaned. )

Sound like your money would be better spent on A clean/seal of your gas tank, new fuel lines,and then new injectors.

They wont clog-up again( for A long time)and you wont ever need to have down time while you are pulling out your hair trying ta get your carbs in balance.

No matter how you go the 1st thing that should make sure of is getting clean fuel. Injectors dont just plug up with clean gas.

[ionman]

I may be wrong, but I have been led to believe that in order to take full advantage of triples you need serious upgrades in other areas such as camshaft, valves, exhaust, etc.

But then again I have also heard lots of horror stories about SU's that I just haven't found to be true. My new set works great. My only issues now are with the choke (it's more that the cable is old than anything) and fine tuning the mix knob on the bottom. Seems like it's running to rich or too lean. I need to shadetree it a little more. Anyone out there with insight?

[Ivan]

you defiantly need a cam that supports triple carbs or the carbs will only preform as good as twin carbs

[2ManyZs]

I agree, it sounds like you have a problem in the tank that is causing your injector fouling. I'd suggest trying to find the problem before you do any other work.

Take a look at this: www.gastankrenu.com

Or for a do-it-yourself kit try www.eastwoodcompany.com

Unless you planning major modifications to your engine to support the triples, I think a big throat throttle body, free breathing air filter, and a good flowing exhaust will wake up the car nearly as much as a set of triples for a lot less money. You can also get high flow injectors to go along with them, but they end up being kinda expensive. You could try a set of injectors for a Turbo ZX for a little more flow, haven't heard of many people trying this, but it ought to work just fine.

Besides, while people are having all sorts of problems with cold starts with carbs, most of the time you can just laugh at them when you just hit the key and drive away. One of the plusses of fuel injection.

[Datzun76]

Hmm so your saying my fuel tank may be causing the problem? My fuel gauge did stop working at the same time the lag showed up. So what do I do just check the fuel line from the tank? My amp meter for the battery stopped working as well and I know its nothing to do with a bad fuse.

I will be buying new turbo/larger injectors for it at the end of the week then take it to the shop. Does not seem like the webbers will make much difference in HP which is the only reason I even considered it.

Thanks for all the help.

[2ManyZs]

Yup, if the injectors keep clogging up it has to be coming from somewhere, more than likely the tank either has some rust in it, or it has collected a lot of junk from bad gas over the years. I'd say it may be rust, if you pull the filter and find any sediment at all it would indicate rust is coming from the tank. You might be further ahead to go ahead and pull the tank if that is the case, that way you can replace any vent lines that may be needing replacement, fix the fuel gauge, and fix the car at the same time. If you do unhook the lines form the tank, be sure to blow them out good with compressed air to free any sediment that may be caught in the lines.

[zorro]

To get the full benefit from Triple Webbers you really need high compression, good head work and the correct cam. I have a friend with an L28 with this work done putting out 230BHP at the flywheel with the 240Z carbs but with the triple webbers it has gone up to between 280-300BHP. There is a bit setting them up but there worth it..............if you don't want fuel economy?