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Triple Webers

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J

jcsb

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So here it is, I own a 60 3000 MK1 BN7 with twin SU's. I've been thinking of switching to triple webers. Why you ask? Well in the future I'll pull the engine and do some internal mods and I also really love the way they look (very shallow of me I know). So here's the question. What type of concerns would I have over the SU's when if I change to the Webers? I've balanced carbs before and that would not be the issue. From experience which ones stay synced the longest and are there any other concerns I'm not thinking of?
John
 
jcsb said:
Ok, well documented. Then any thought on triple SU's?
John
Click to expand...
Not much I can add here that isn't in the thread Rick linked to, except that you'll probably live longer__with fewer heart palpitations__by going with three (3) SUs...

If you want Webers, they're doable, but you're not going to get them installed and set up in a weekend.
 
I was thinking of both of these set-ups, but in the end I was convinced to go with a good twin set-up. The advantage of the twin for me was I already owned a pair of HD8's and I was assured that the DMD twin manifold (made in Melbourne Australia) had a distinct torque advantage over Webers. It certainly does have torque, and I believe Steve Pike (of 100S restoration fame) races his car with this set up, and also the guy who rebuilt my engine for me (who has a 100/6 with webers -and i think a 3000 engine) was so impressed he was joking about stealing my manifold for his car...

And only two carbies to work on.

For a fast road car you might consider this option, where lets face it, you are mostly using torque, not top end power - if you are going to race, maybe the power of the Webers may suit you best?
 
Thanks for everyones input. I believe I'll stay put for now. I have had many years experience with SU's in sports cars and motorcycles (custom) and feel very comfortable with them. Maybe triple SU's though.
John
 
JCSB, if you are willing to go the trouble of Webers, maybe you'd be up for electronic fuel injection (EFI). I've got what looks like triple SU's but in reality is EFI. Once done, no easy task, but you are done!... runs great and self adjusts for a lot of stuff. Just a thought... https://stevesaustinhealey.com Cheers, Steve
 
Hey John

Here are a couple of shots of the DMD inlet manifold. The throttle linkage was made up by the guy (Ian Stewart) who rebuilt the engine. The only thing is that you need fuel bowls that sit flat - these were off something like a Jag - as the carbies now sit flat rather than angled up.

IMG_1960_zps9d944a0b.jpgIMG_1961_zps1dbfc653.jpgIMG_1962_zps6fe947cf.jpgIMG_1963_zpse7c10e4b.jpg
 
Well, I guess I'll add to the carburetor porn already posted. Team Healey PDX Members run both triple Webers and Triple SU HD8's. Boy Racer, Richard Mayer's triple Weber 3000 MKI is a dedicated vintage racer, my '57 100-6 MM is still street legal and I enjoy an occasional street "shake-down" after periodic upgrades and adjustments for the track.

Unless, you're really looking to optimize all aspects of performance in you car, twin 2" SU's are usually enough.


 
The Triple SU's did not last long on Healys. The 29 F engine followed and it put out about the same HP. As for Webers, when the healeys raced at Sebring, and other places in the 1960's. 70's. we had to had to cut a small hatch on the left side of the car beside the hood in order to service them. If you take a look at some of the old pit pics, you will see the hatch.
 
When I was doing my car, I discussed triple Webers with Denis Welch. His recommendation for a road car was two HD8s (and a few other mods).
 
HealeyPassion said:
JCSB, if you are willing to go the trouble of Webers, maybe you'd be up for electronic fuel injection (EFI). I've got what looks like triple SU's but in reality is EFI. Once done, no easy task, but you are done!... runs great and self adjusts for a lot of stuff. Just a thought... https://stevesaustinhealey.com Cheers, Steve
Click to expand...
Hi Steve
As usual from you,very useful and complete seven pages on EFI, that help me to understand all aspects of this important Mod.-
only TWO inquiry:
what is the actual costs of a complete EFI system??
and your opinion on EFI system, affidability -after a year of trip on your car??
CheersDSCN2253b.jpg
 
For outright performance you cannot beat Webers, it's as simple as that. For spirited driving and a fast road set up the best combination is a fast road cam, DWR8 type profile and twin HD8s.

No point in fitting Webers unless you are upgrading the other bits to mAke use of them. They need to be set up on a rolling road. Once set don't fiddle with them and they will be fine.
 
In '61 I began tuning SUs on a Volvo, then in '67 to Webers on an Alfa, could not believe difference, Webers like working on a fine watch, turn the mixture screw and no question when you were at the sweet spot tween rich and lean, on SUs it s a cupla flats this way or that, lifting the pin to raise damper, maybe yes or no. Then on to more Webers on 330 Ferrari, SUs on TC, Elite, Jag, and Healey. Currently 5 SUs and 2 Webers under management. Weber once set stay that way for a year if not more, however if you live where summer and winter are diff temps they will need to be adjusted. SUs have jets to be centered, cork washers to replace, much less the unreliable float chamber shut off system, (replacing with Grose system cured that). All of my SUs except Elite had come with factory carbs, same true for Webers so all my tinkering simply to tune RIGHT jets. If you can find Webers with correct jetting for Healey they will be never be touched except for turning mixture screw and balancing screw. SUs harder to tune, more steps, and have other parts that give way. Six years of Alfa, One year of Ferrari, Eighteen with Seven and never had a gasket or part go bad. Jay, '65 3000
 
Boy if you think webers are good, try tuning Dellortos. I run them on my Porsches and VW's. I set them and don't touch them for years at a time. I had some on a VW bug and didn't touch them for at least 6 years until I sold it.
 

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I've also owned factory weber Alfas and used to look down my nose at SUs. Have to say in their own way they are as elegant as Webers. They do almost as much with just a small handful of parts as Webers do with a crateload.
 
Andrea, I don't want to hi-jack this thread with the EFI stuff.. I was just wanting to provide an alternative to Webers. But, to answer your questions.... the whole EFI installation cost about $4,000..... and I love it!...pretty much does everything well... cold & hot starts, mountain driving, whatever... pretty slick. My friend has that much in his Weber installation. Cheers, Steve
 
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