Triple 45mm Webers on L28 ?

[280zx Fever]

If i cant get my EFI System working i think ill get some triple 45mm webbers on a L26 manifold..

What i would like to know who has done this before ?

What did you have to do ?

Thanks

[ZmeFly]

going to carbs from efi isnt that hard, just have to tune the properly and you would also have to have the engine to do it as well.

triples on a stock engine wont net much if anything but more gas consumption.

[280zx Fever]

Well from what i heard the webbers would give me better performance i suspose it all comes down to the jetting,,but i could also go larger injectors....

decisions...

[halz]

Webbers (3 of them) will help you if the rest of the engine has been suitably modified with performance in mind. Eg. performance camshaft, exhaust, cylinder head work. On their own, you will probably gain a minor maintence headache and not much else.

[240znz]

45's will be a little big for a standard L28. You would be better of putting a set of 40's on there. You will notice a difference in gas mileage and noise (lovely "gorp" induction tones) if you do choose to go with triples.

However, if you have a wild L28 then absolutely put them on.

I still think you are better keeping the EFI as starting triples in the middle of winter can be a PITA. Once you have set the 45's up then they shouldn't go out of tune too much. To get them setup properly you should really put the car on a dyno to find out the best jetting combo. Maybe someone here has already used 45's on a L28 and can give you a head start.

Good luck

[280zx Fever]

I cant see why twin 45mm's would be too large for a 2.8litre ?

i know they put them on A15's which are only 1.5litre

but i suspose it comes down to jetting..

It was just a thought...curious to see if anyone had done something like this before.

So its true that the Webbers be it twin single or triple dont go out of tune ? well not much meaning you would have to tune them every week ?

[240znz]

If you are looking to go and build an all out race engine then you will need 45's in there as you will be pulling high rpm.

So after all your cam, head, ignition and exhaust mods you will need to go to 45's.

No they won't go out of tune every week but you may notice a change in atmospheric conditions can effect your tuning. Hot day vs cold day, altitude does make some differences also on jetting sizes.

Classic case for atmospheric changes happened to me when I was racing a 125cc Kart in New Zealand. I bought the Kart in one city and then moved to another. When I first used it in the new city, it would flood on tight hairpins. Turned out that the main jet was too big by a knats gonad and that was all due to the fact the air was less dence (humid). Popped in the next size down and what a difference. The jet size change was minimal. Yes a small change but it didn't half kill any slim chance I had of be competitive.

For what you will be spending on buying and setting up triples properly, you might well be better to invest in a upgrade ECU for your existing injection. You will get better daily driver use. Maybe even get a ZX turbo engine in there and really notice the difference.

Triples aren't cheap.

Good luck

:classic:

[280zx Fever]

I know triples are not cheap but just an idea i came up for.

At the moment the engine is in a smashed up car in my back yard

Just i was thinking *if* i get a 240z or 260z wiring in the EFI would be a pain....webbers would be easier to install imo.. but not knowing much about them better not

thanks for the imput

[240znz]

Once you get your 240, swap the L28 into your 240 less the injection and there you have an extra 30BHP just like that. Keep the ignition and maybe rejet the SU's. Nice drive then.

[moyest]

Dear 280zx fever,

Before you get into the webber 45's, you may want to check out this link:

http://www.racetep.com/webcatframe.html

Go to the link titled "Before chosing your REDLINE Kit". Read the info on the way the webbers are usually set up (i.e. "de-tuned"). I'm not expert, but I've been told that 40's would be fine even if your engine is pulling high revs. Like you said, it's all about jetting!

Check out the rest of that site too, it's very informative!

And check out MY website while you're at it!!!

www.angelfire.com/pro/240z

Cheers!