DCOM or DCOE for the Z

[WogsRus]

Hi Guys

 

Ok so i have the opportunity to get a set, only two will need to find a third, 40mm DCOM VERY cheep rebuilt two years ago.

 

From what i understand the DCOM is an improvement on the DCOE and much better for a street driven car.

 

I was wondering if someone could shed some light on what would be best a DCOE or a DCOM carburetors for my 260z.

 

Essentially the engine will be a 10:1 compression using flat tops and N42 head with big valves and so froth, looking for 200 Hp or so.

 

Any input would be great.

 

Thanks

[RB30X]

Essentially the engine will be a 10:1 compression using flat tops and N42 head with big valves and so froth, looking for 200 Hp or so.

 

How much hp will you get from the 'so froth'?

 

I don't know anything about carbs but I would look into availabilty of parts for the DCOM carbs (of which I have never heard of). Also, buy your carbs in three's. Guaranteed the two you buy first will have everything different to the third one.

[WogsRus]

Well essentially using an L26 block, rods, flat top pistons fly cut, N42 head shaved and welded, lighten the whole dam thing to buggery, and hay persto.

 

The DCOM came after the DCOE they were an improved copy of the Dellorto carburetors.

[Zeddophile]

How much hp will you get from the 'so froth'?

 

Have to say, never had much luck with the so froth modification on my engines, the froth usually seems to be a bad thing....  Maybe its different on Datsun motors though, or maybe its because I didn't fit the 'hey persto'.....

 

 

I've never heard of DCOM carbs before either, but I believe that Dellorto carbies are a copy of Webers, not the other way round.  Quite a few people feel that the Dellorto is actually a nicer running carby though, but I think jets etc. are not as easy to get hold of for a Dellorto as for a Weber - hence the majority of people using Webers....

[twosixty]

Yeah the dcom's copied the diaphragm pump style from the dellorto dhla carbs, But still similar to the dcoe's.

I'm bias (I have 45dhlas), but I'd lean towards the dcom's as they are the last refinement. At the end of the day the tuning and jetting of either type of carb will determine how successful it is.

[hunterzed]

Just a caution on the purchase of these carbs. Why are there only 2? Are they a matching pair of a 4 cylinder or were there 3 of them? Did the guy buy them with the same intentions as you and had a lot of trouble finding a 3rd to complete the set hence he is selling them on to someone else? Having said that, the parts for these shouldn't be any harder to get than any other dellorto carb but I'd make sure you can definately get a 3rd carby that will match these 2 as well as find a parts source before you commit to buying them. If you can get those to things sorted then go for it.

[WogsRus]

Carburetors were on a 4 cylinder dado in Europe hence why there is only 2.

 

Yeah well we will see what they sell for but they are DAM cheep

[hunterzed]

Do you have any more details on the carbies. I found the dell'orto website and the only 40mm carbs are off an Alfa Giulietta turbo. Part number DHLA40L.

http://www.dellorto.co.uk/merchandise/products.asp?CategoryID=1&PartsectionID=10

I also found this site to compare Dell'orto to Webber.

http://www.opelgt.com/forums/aftermarket-side-draft-carbs/12021-weber-vs-dellorto.html

[hunterzed]

Wow. I just read through the forum I posted. Has some pretty good info that can easily be adapted to L series engines. Pretty good read.