tunnel ram carb talk

[ChopperScott]

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[Tuner]

You would gain with 850s but not for money spent. You would Def be happy with a pair of doms and see better improvement. I went through same thing with 900 plus hp sbc. Braswell told me when I went from 865 hp to the 935 setup that his 850s would still do the job. I ran it 3 times, about 7 passes. Went to doms and went from 8.04 to 7.87 in 1/4. Was it worth 3200.00 upgrade. Hell yes. Would it be for everyone? Who knows. It felt and acted like a whole different deal. I discussed it with him and he was amazed at gain I had. The 850s didn't miss a beat but they were out of their realm. And this was on 380 inch sbc.

What was the MPH? You're saying you gained 100hp?

100hp per additional circuit

[Tuner]

This could be better than, or at least as good as, four QJets.

[cgarb]

Wonder why nobody ever tried 4?...2 per side...lol. Honestly I'm sure someone has.

[bob460]

You would gain with 850s but not for money spent. You would Def be happy with a pair of doms and see better improvement. I went through same thing with 900 plus hp sbc. Braswell told me when I went from 865 hp to the 935 setup that his 850s would still do the job. I ran it 3 times, about 7 passes. Went to doms and went from 8.04 to 7.87 in 1/4. Was it worth 3200.00 upgrade. Hell yes. Would it be for everyone? Who knows. It felt and acted like a whole different deal. I discussed it with him and he was amazed at gain I had. The 850s didn't miss a beat but they were out of their realm. And this was on 380 inch sbc.

What was the MPH? You're saying you gained 100hp?

Gained .17 as he said and 70hp seems right to me.

[F-BIRD'88]

In that thought path what about 3X 750's on a custom plenum top.?

[prairiehotrodder]

seems to me like ultimate CFM isn't the answer, having 1 carb barrel positioned over each intake runner is what you want. I watched a nelson racing video where he jetted the carbs that way. He had an O2 sensor in each header primary and tuned each barrel of the carbs accordingly. I've never tried that because i only have one O2 sensor and i'm not very good at reading spark plugs. Wish i had more expertise on that though. Probably could gain some power.

Brian

[F-BIRD'88]

The late Joe Sherman told me re: tunnel rams that if the carbs are big you want the plenum box height lower to the runners. If the carbs are "smaller" you want the carbs higher up over the runners. Carb height (and plenum box volume) matter.