Carb question

[Cooper04]

With my G340 full mod should I run a WT990 or a WT1107? I’ve seen people say the 990 pumps more fuel and then I’ve seen other people say the 1107 pumps more. I honestly don’t know which to use at this point and don’t wanna waste money on a lower performance carb. So, what is y’all’s opinion on them?

 

[pyroM!ke247]

My ESP G320 came with a 1107 installed on it. go with the 1107. 990 would work too. Some guys like 990 some like 1107.

 

[Jshaff16]

I was in this same predicament real recently. This is what I went with from the man himself...

QUOTE="Seandonato73, convMessage: 29913, member: 22646"]
Yeah more or less identical, the 1107 is a tad bigger then the 990, but I've been told that was to overcome the "loss" of airflow from the choke. You can use them interchangeably.
[/QUOTE]

 

[Seandonato73]

The truth is they are basically the same carbs. The 1107 has a slightly larger venturi, but had a choke. Either or will work the same, with no real discernable performance edge noticable to the average user.

I was in this same predicament real recently. This is what I went with from the man himself...

QUOTE="Seandonato73, convMessage: 29913, member: 22646"]
Yeah more or less identical, the 1107 is a tad bigger then the 990, but I've been told that was to overcome the "loss" of airflow from the choke. You can use them interchangeably.

[/QUOTE]
Beat me to it ?

 

[Cooper04]

Thanks guys, so the 1107 is basically a 990 with the added convenience of a choke?

 

[Jshaff16]

Yes.

 

[1Coopgt]

With my G340 full mod should I run a WT990 or a WT1107? I’ve seen people say the 990 pumps more fuel and then I’ve seen other people say the 1107 pumps more. I honestly don’t know which to use at this point and don’t wanna waste money on a lower performance carb. So, what is y’all’s opinion on them?

Either one will be fine. Do you want a choke or not ?

 

[AnubisBC]

If you plan on running in sand a lot, I would recommend the 990 over the 1107 for the reason that it doesn't have the choke. One less infiltration point. Of course there are modded 1107s and 990s out there that seal up the shafts with a bearing, so my point would be moot if you went with one of those.

I've only ever run a 990 since 2010, so I'm kinda partial, but the 1107 is a great carb too.

 

[Jshaff16]

I personally have both. 990 is on my 32 and 1107 on my 30.5

 

[Cooper04]

Thanks again guys, forgot to also ask about the 813 with the accelerator pump. I’ve heard it’s basically a 990 but for drag racing and that it’s not well suited for bashing but I’m not sure

 

[Seandonato73]

Skip it, when the accelerator pump goes out, it needs replaced.

 

[Cooper04]

Skip it, when the accelerator pump goes out, it needs replaced.

Thanks, I have one in my box of spare stuff but haven’t really tested it much

 

[Seandonato73]

don't get me wrong. I think they are great, along with all of the other walbro models with accelerator pumps, but they are non serviceable. And when (not if) they crap out it's a boat anchor. So just not worth it, when an 1107 (or 990) will just keep on working with just a basic rebuild kit.

 

[Cooper04]

don't get me wrong. I think they are great, along with all of the other walbro models with accelerator pumps, but they are non serviceable. And when (not if) they crap out it's a boat anchor. So just not worth it, when an 1107 (or 990) will just keep on working with just a basic rebuild kit.

Yeah good point, I’ll probably go with a 1107 and might buy a sealed bearing upgraded 990 from DDM down the road