fastlane40

Thinking about it.Is the tunnel ram the ultimate carb spacer.

CPPerformance

We have seen great results on all types of applications with the HVH super sucker. They are hands down one of the easiest, simplest and least expensive upgrades you can do to an engine. http://www.cpperformance.com/detail.aspx?ID=3354

getrdunn

iTrader: (7)

I've been reading through the post and as most of you probably had some chuckles and perhaps learned some things from what other have experienced. The simple fact is, is that it is an enexpensive test. If you have the room try it. Heck I'm game for anything. There may be pros and cons in every application. Some will work better than others where some may even go backwards. I certainly believe everyones own individual components will determine the end result.

Talked to Dean Gellner yesterday and he mentioned 10 to 12 HP gains as far as dyno results. Personally I took this as it could vary a lot. We all know the true test is on the water.


The one thing "I think" I understand what Stevexm is refering to is if this is so then why don't intake manifold manufactures incororate such design in specific type intakes? I would imagine the R & D along with the mold cost might be pricey. Dificult to say really. Perhaps liminted space in many applications? Then again that's probably why they make tunnel rams.

Ghostrider

I just had a crazy idea today while swapping carbs... I had to open up the bores on my 4 hole to fit the butterflys on my new 850 HP D/P.

I have both, a phenolic 2" Open and a 2" 4-hole spacer. I had the 4 hole for the Victor Jr, and the open I got for the RPM Air Gap. During a moment of madness, I took my die-grinder to my 4-hole and made a 'Super Sucker' copy by hand.

I marked out all the port diameters and grind extremeties, then set to work grinding with a stone tapered bit. I know my hands aren't CNC quality, but I like to think I'm okay.

Once sanded smooth and finished, it looked great and even across the bores. Now, if it all falls apart and wrecks my engine, I'll probably cry. But in the mean time, I have a modified spacer to try too!

If it all fails, I suppose I will be the 'Super-Sucker.'

Game On!

stevesxm

there is always the significant added benefit of insulation from the spacer. there was a very restricted catagory of motors that i did where the overall intake dimensions had to remain std but you were allowed to machine the carb flange for the carb... so i whacked 3/4 inch off and made a 3/4 phenolic spacer that replaced in standard form, the al that had come off and those motors ran considerably better on the track than the ones w/out and when you took the decklids off the carbs were always " much cooler" to the touch. so anecdotally it seemed to me that the lack of heat soak was a good deal and i simply figured that it wasn't heating the inlet charge or something. i had no real data but the results were a net gain every time. the dyno said it was the same ( no surprise as nothing had changed in the flow scheme) but on the track there were more revs and better acceleration numbers every time.

some time ago roush and yates started doing something on the floor of the intakes like a fluted pyramid sort of thing... it sat directly under the carb and worked like crazy on the cup motors. i never actually saw one but they were reportedly very effective... has anyone ever done anyting with those outside of nascar ?

Ghostrider

I think they marketed them as a 'Turtle' or something. I bought a Holley Strip Dominator for my SBC in my old race boat off ebay and it came with one. He'd drilled the center and tapped it, then screwed it in to the valley beneath the carb. When I asked him about it, he said it was to more evenly distribute the flow down the runners.

Buggers me if it made any difference but that SBC ran happily to about 7500rpm!

TexomaPowerboater

I don't know what kind of spacer I have because it came with the previous motors, but we built new 502's this summer with 502/415 longblocks, merlin dual plane intake, 850 holley. We only had one spacer so we used it on the engine powering the power steering. Both motors were set up exactly the same, minus the spacer. One made 419hp at 5000rpm, 498lbs at 3900. The other made 424hp at 4900rpm, 502lbs at 3800. Could have been a coincedence as we were testing two different motors.

FlyinZX14

My carb spacer came from weiand, its a 177 carb spacer, comes with its own belt. Its a big spacer too, like about 8" and squeals real funny! does add alot more power!

getrdunn

iTrader: (7)

had those, been there - bm 420's. was fun and your right - the noise even gets better when you crack the hatches with three of those bad dogs in there.