Hello, right now I'm running bored SU's (50mm) on a Rebello built 3.0L stroker motor. It's been suggested that I get the tripple carb set up, and I'm leaning towards getting it. Some say I should get Weber's because parts are more obtainable. But I thought I would get some input from the club before I make my purchase. my questions:

1. how much horsepower could I gain??

2. Are there any cons running tripples rather than SU's??

3. Which model of carb and intake should I get? (I'm willing to give up driveability for performance)

4. Where is a good place to purchase from? I'll need the whole set up, carbs, linkage, manifold.

www.racetep.com

They have the complete weber kit...I would suggest with a 3L to get their 40DCOE kit with the TWM manifold. Really dont know how much HP you will gain as I do not know the full particulars of your engine set-up and/or how much HP you are making now. As for cons....they can be very tricky to tune to get the big three all right....driveability, Top End HP, and Fuel Mileage...but it can be done...just very tricky...it is almost a black art.

you say the 40DCOE?? what about the 45's or 50's

I say 40's for the fact that the TWM manifold is bored to 40mm....to the fact that the intake ports are about 40mm, and to the fact that a 3litre is a stroker motor that is best suited to making gobs of bottom end torque....with 40's it will be olot easier to get 2 of the big 3 knockedout....driveability...aka bottom end torque, and fuel mileage....then it is just a matter of main jet selection to get the top end power.....gotta remember that the motors they were hanging 45's and 50's off of in the 70's were really "over carburated" and were turning around 8-9k rpm all the time. Give me some specific numbers on your engine..ie total displacement and I can crunch some numbers and get you a pretty good ballpark setup.

well, I finally got a hold of my engine builder. It's been suggested that I use 45's with my set up. I was told 40's would be too small. so now I'm going shopping.

check your PM

Here's another place you can find parts and complete triple set-ups.

I think 45 would be the max on a street driven car, even if you only use it once in a while on the street, a lot would depend on your cam.

http://www.wolfcreekracing.com/classified.htm

I ran a 2.8 with a trick head and 40DCOE with 33mm chokes....had a devil of a time geting good driveability with it....I would suggest 40's and 33mm chokes on a 3l and get it proffesionaly tuned from there.....check out www.racetep.com give them a call and talk with them about it. I seriously doubt that your head is ported to 45mm, and I know the off the shelf TWM intakes are bored to 40mm....port matching will get you more HP in the useable range than a over-carbed engine will.

IMO Your easy way out would be skip the headaches of sinc, link,and jetting. Go fuel injection :devious: Then you will get the performance your looking for and NO headaches. Unless your hung-up on the need for carbs and always wanting some thing to do under the hood. If thats the case I would be all over the

BRE Manifold from wolf creek. :cheeky: As for carbs I feel thats more a matter of taste and know how for tunning vs. one better then another.

Dreco,

It sounds like you did the right thing by calling Rebello, since they built the motor and do have exstensive knowledge and experience with the L6 Datsun motors. Call it a hunch, if you will, but it's likely a safe bet these guys know what they're talking about.

Dreco...go ahead and use the 45's....I think they will come with 36mm chokes...worse case it is too much and you can choke them down some more...I was mainly concerned with port matching....but apparently Rebello is not..oh well.

Dreco,

Well, I quess I'm wrong! Mr. know-it-all (Dtsnlvrs) APPARENTLY knows more than the guys at Rebello. Sorry for the miss information.

P.S. I still would go with Rebello's recommendations. And I'm sure they considered the port matching issue.