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Fri Dec 23, 2005 1:25 am

I just was wondering if the 40/44 HPMX carbs was any good? because I was thinking of purchasing a pair because of the price and are new. or should I stick with WEBER or DELLORTO? or what would be the best dual carbs to run on a basic dual port 1776? any info would be great thanks! :bug_blue:

Fri Dec 23, 2005 6:55 am

EMPI... enough said.

They can't make a header or engine sheet metal that fits. A carb is a bit more complicated.

Fri Dec 23, 2005 6:57 am

True dat. EMPI used to stand for something good. Now it's garbage.

Fri Dec 23, 2005 7:08 am

Just for some perspective. I've worked on a set of these. They have the same internals as real Webers and tune the same. I set up a set of the 40's for a guy on a Manx clone (1915). They seem to work just fine. Same rules apply as with Webers. They must be stripped down (yes even when new), cleaned, float levels set, and jetting verified with a jet guage. The mains on this BRAND NEW set had been reamed. Fuel pressure is just as critical as on the real thing. That said ... long term wear due to the metals used in their construction are a mystery. No long term track record for reliability.

Fri Dec 23, 2005 12:01 pm

I only buy used carbs and rebuild them.Why pay $800 on a new set that you have to rebuild when you can buy a set of used carbs for $350-$400 and do the same thing?

Fri Dec 23, 2005 3:21 pm

lol! Too much, Alan.

Sat Dec 24, 2005 6:10 pm

from the reply mostly negative and 1 positive thanks for the feedback! how about the new 48 IDA's where are they made? ITALY? any feedback will help on my decision? or if any suggestions on what to run for duals?

Sat Dec 24, 2005 6:12 pm

The new IDAs are made in Spain.

I've never seen them but have heard they are just as good.

Sat Dec 24, 2005 6:22 pm

48 IDA's would be a bit much for your 1776. Don't let my previous post stand as an endorsement of EMPI's Weber clones. They are entirely too new to give a positive evaluation. Talk to Steve Huston at Serrano's about new Webers ... 40 IDF's would be a nice choice. But read Mark's and John's write-ups on proper prep on any Weber (new or used) installation.

Mon Dec 26, 2005 11:14 am

thanks glenn and clearsurf2001 and all the other feedback from everyone! :D

Mon Dec 26, 2005 11:28 am

Are the heads on your 1776 ported? What size valves? Where do you want the power? Low down? Mid range? Top end? If It were my car I would buy webber 44IDFs not 40s. Then buy new vents that fit my application and keep the stock vents(36mm) for a bigger motor. 44IDFs are a more flexable size carb. You can get 32mm-40mm vents which should be good for anywhere from a mostly stock 1600(32mm vents) to a 2110 or better.

Mon Dec 26, 2005 11:58 am

65 BAJA heads are stock dual ports. in the future I was thinking on running a 1914 or a 2110 or 2180 not sure yet thats why I was looking into the 48IDA'S also.

Mon Dec 26, 2005 12:09 pm

In that case 40IDFs (with stock 28mm vents) may limit your top end power. 44IDFs (with stock 36mm vents) would give you a soggy bottom end. Personally I would still go with the 44s. With new vents and jets if the budget allows. If the budgets not there then go with the 40s. The 40s will be about $100 less to dial in perfect but could limit you on the top end.

Mon Dec 26, 2005 12:12 pm

48 IDAs would DROWN that 1776 with stock heads.

You'd have the cleanest cylinders on the block.

40IDFs are the best match for that combo, but if you plan to upsize, I'd run some 44's with smaller vents, like 32s.

I have run 44's with 36 vents on my 1848cc bus engine recently, with stock sized valves, but the heads were ported, and even so, it ran fair on the first set of jets I put in it. You'd get more torque and cleaner top end response out of it with 32 vents, and the 44's would grow with your engine. You'd have to exceed a 42 intake valve before you started pushing the limits of the 44's, with the right combo.

Tue Dec 27, 2005 1:12 pm

thanks guys the info is greatly appreciated! so the best bet for my 1776 would be the 44's with the 32 vents? what would be the jetting size? or what would be the best combo for my 1776? carbs? ventury? jets? the best one time set up without guess work or tinkering with vents, jets, carbs, ect? I just want to get the best power out of the motor without any lack of power low,med, high end.

Tue Dec 27, 2005 2:27 pm

You'd have to screw around with jets to get optimized, but I would say that a 125 main, 160 air, and a 55 idle would be safe, on F11 tubes. If you want perfect first time, you are dreaming.

Wed Dec 28, 2005 11:13 am

I knew I was dreaming on the last question I posted but thought I'd try and get close and work from there. :lol:

Wed Dec 28, 2005 4:58 pm

Every motor is different and your motor is a little bigger than mine but. On my 1600 with 32mm vents I'm going to start with 125 mains 200 airs, 52.5 idles and F11 tubes. The Air will probably end up at 180 but only time will tell for sure.

One thing you HAVE to do is make sure the fuel pressure is set between 3.0psi and 3.5psi. Not 3.6psi or higher. Not 2.9psi or lower. VERY important.

Mon Jan 02, 2006 10:56 am

thanks for the info guys I'll try it! :vw: