flat tops vs round top

[mike260z]

hi, can anyone explain me why is better the round top SUs than the flat tops? i have a 74 260z but i need the SUs, what else i need to put the round top on my car?

[conedodger]

The carbs original to your car have a number of changes for smog purposes that make them notorious. Reportedly hard to tune etc... They have many detractors and are often refered to as 'boat anchors.' They also have many supporters who will probably show themselves in this thread.

I think you need the carbs and possibly the manifolds only. Pretty sure everything else will fit. I have a set if your interested. Just PM me.

[Bruce Palmer]

My submission is that Datsun dealers replaced many a set of flat top carbs when those cars were new to satisfy unhappy new owners.

In answer to your other question... our part number ZT161 will provide what you need to convert to the earlier carbs (70-72) and takes into account the fact that you have no round top cores to send in. www.ztherapy.com

[EScanlon]

Bruce:

I recall someone saying that Ztherapy had a flat top service, is that still the case?

Either a service or exchange, but this is all hearsay so please straighten me out; Is there something that Ztherapy does for the flat tops? If not, what do you recommend?

E

[sblake01]

I'm one of the aforementioned "many supporters who will probably show themselves in this thread" but, alas, you can't find parts for flat tops anymore, the machine shop that I used to fix them back in the day has long since closed and the guy who used to help me set them up passed away about two years ago. I still contend that they can be made to work as well if not better than round tops but round tops are so much easier. I've never heard of Z Therapy doing any work on flat tops. I'm sure that Mr. Palmer's recommendation for them would look something like this:

Edited September 7, 2008 by sblake01

[Bruce Palmer]

The only service we offer re: Flat tops is the change over to the earlier round top carbs. Be the flat tops good or bad, we have a big enough problem keeping up with the round top market to try and source another inventory for the flat tops. Couple that with the fact that the inventory doesn't appear to be there and the flat top market would be very small, it makes no sense for us to even try to get involved. We are generally booked out 2 weeks on for new orders and production will only be dealt with by the owner to insure the quality the company is known for.

As it stands, we haven't even opened up our offerings of the SU SUs to the British entusiasts. Volvo owners can get their carbs done, but that's it. The balance of our offerings are the Hitachi SUs for the Z car, roadsters, 510, Etc. And, of course, the internet allows eposure world wide which puts a customer multiplier into play like never before......

PS: If anyone has been trying to email us, it seems that none of the emails to the website are working, so if anyone needs to catch up with me via email, use ztherapy@msn.com