Weber DGV or twin SU HS4s

[eejay56]

My engine is a european spec high compression 1500 with no emission stuff. It currently has a Weber DGV. Would it be worthwhile to switch to the twin SU setup? How does performance compare. Are the SUs more difficult to maintain/tune/adjust?

 

[philman]

i would go with the su's. I had twin dgv setup on my tr7 and had flat spots on the power band, and a noticable hesitation if accelerating while cornering. I put on twin hs6's and like the power band better. I gave up some of the acceleration but like the power curve better. I think that su's are practically bullet proof and easy to maintain. Just make sure you get all the carb linkage.

 

[philman]

oh, you are right up I5 from me!

 

[kodanja]

I have dgv's on my tr6, Ive never had any problems with them since I had them re-jetted /bcforum/images/%%GRAEMLIN_URL%%/driving.gif

 

[BrokenRacecar]

I second the SU's, I could never get the weber to run right, regardless what anyone says about how easy they are.
smooth power, no 2nd barrel kicking in. my 2 cents, Greg

 

[DanNagy]

I had dgvs put on mine and had a lot of problems. Mechanic number one had some issues. So, I looked up how to set them up myself, but after a weekend, I still couldn't get them to run right. Then I took them to mechanic number two, and he has them running perfectly. I have no idea what he did differently. I have no regrets for the trouble they put me through as the car really sings now. I haven't experienced any problems with power loss in curves like Strombergs, or power band issues, but perhaps I am not as experienced as other drivers and wouldn't notice the difference.

You may want to have an expert look at them before going through the expense of switching them out.

 

[RonMacPherson]

Might wanna do a search for Teglerizer.com. He has a good site with detailed tuning specs, jets, etc. for a 1500 listed. This would give you a starting point to check your jetting. Once the Weber is set up, it is almost forever(provided you are using clean, filtered gas at a pressure under 2.5 psi.)

 

[kodanja]

Maybe the Webbers differ, but I have had mine on for 2 years completely trouble free. Great exceleration nice steady flow of fuel.
I'm running a stock fuel pump.

Could be the intial setup...

 

[eejay56]

I haven't had problems with my single Weber mainly looking for a little performance boost. Plus I like the period look of twin SUs. I think I'll start checking EBay for a good deal on the twin setup.

 

[eejay56]

oh, you are right up I5 from me!

We should get together. If you get up to Salem give me a PM I don't get south often but I plan to be in Albany on the 30th to try my first autocross.

 

[eejay56]

Hey BrokenRaceCar, we're practically neighbors. Welcome to the forum. What kind of car do you drive?
Just saw your PM. You've got one.

 

[philman]

I'm trying to talk my brother into chucking his single weber set up. he has a rather nice mikuni (?) carb set up for an mgb he purchased from a company called PRI Racing (I think) down in Roseberg. This link is a good article on carb choices for the spittys.

https://www.triumphspitfire.com/carbchoices.html

 

[eejay56]

Thanks for the link. I talked to a guy from PRI at the ABFM Real nice guy. There was a very custom Spit that they had put their sidepipe exhaust and one of the coolest roll bars I've seen in. It also had 4 bike carbs, I think they were Mikunis