Who now what's the best big block high performance intake there is?
In the power range of 2500/6700rpm.
thanks!!

The one that the 8-71 blower bolts to!! :D

Victor Jr.

for a single plane check out the team g up to 8500 rpm and also dont under estimate the stealth idle to 7000 rpm the stealths going on my 700 hp combo...mike

Originally posted by 69ralleygreen:
for a single plane check out the team g up to 8500 rpm and also dont under estimate the stealth idle to 7000 rpm the stealths going on my 700 hp combo...mike http://www.holley.com/HiOctn/ProdLine/Products/AMS/AMSM/AMSM.html

Single plane?? don't need no stinkin single plane, Edlebrock Performer RPM or RPM Air Gap will take you to 6700 easily graemlins/thumbsup.gif .

It depends on what you're looking for in terms of intended usage. If this is primarily a street driven car that will spend most of it's time below 6,000 RPMS then a good dual plane intake would be a better choice. If on the other hand you're racing the car witha big stall a single plane may be a better choice. I just ordered a Vic Jr. intake and a 1" open spacer for my car. I'm racing mine about 95% of the time now and my engine never drops below 5,300 from the time that I launch the car until I go through the trap. We'll see if the single plane performs better than the Performer RPM and .5" spacer I have on there now. It's the "big carb/little carb" test. If the engine responds well to the change, and I think it will, time to send my HP-950 to Pro Systems for a little workover. Results to be posted in the spring :(

i dunno, never made any comparison, but imo, big block should still give you enough torque at the lower rpm with single plane?

I got a weiand team g with a 2400 stall lunati 30113 cam on a 383. I havent really driven it much but, if I just barely goose the throttle off idle it makes the tires cry ;) . Im talkin not even 1/4 throttle on the primarys. I cant imagein needing more torque on radials, any more would be a waste. Put the power where you can use it.

Ken, I'm interested to see how much you gain from the Vic Jr. I'm guessing about 2-3 MPH and maybe .15+ in ET. You may want to put the Victor JR. oval port on your rectal port heads. It will Keep the velosity up and you'll still reap the benifit of the single plain.

A single plane for a range that starts at 2500,Not.
Don't do it unless you use nitrous regularly.

Performer RPM Air Gap
Weiand Stealth
Holley Street Dominator

http://www.prestage.com/site/site_display.asp?SiteID=588

Originally posted by gatewayracer:
You may want to put the Victor JR. oval port on your rectal port heads.It would have been an interesting test, but I've already ordered the rect. port Vic Jr. I was noticing that Reher-Morrison uses a similar setup on many of their Super Series bracket motors:

http://www.rehermorrison.com/items/induction.htm

Granted these motors have more compression. It will be an interesting test. Hey, if it doesn't work I can always Ebay the intake for more than what I paid for it :D

Ken,

Did you try back-to-back testing with and without the spacer? Reason I ask is I went .2 faster when I took the 1" 4-hole spacer off my Holley dual plane.

Originally posted by Fuji:
Ken,

Did you try back-to-back testing with and without the spacer? Reason I ask is I went .2 faster when I took the 1" 4-hole spacer off my Holley dual plane. Hey Chris,

I haven't done any testing with the Vic Jr. yet, in fact I don't even have it yet. I just placed my order with Summit on Friday. I'll be testing it in the spring. Most of the tracks are closing down around here for the winter. Plus I've just purchased a Glasstek 2" cowl hood that I'll be getting prepped/painted over the winter. Should be interesting. I'll post my results when I test it.

Ken,

I was talking about the performer RPM.

Originally posted by Fuji:
Ken,

I was talking about the performer RPM. Gotcha' Yup. Well, not track testing but dyno testing. My car made about 11RWHP more with the 1/2" open spacer vs. the RPM by itself. I don't recall the torque difference. This is one of the reasons why I'm trying the single plane/1" spacer setup. My car seems to respond to the additional plenum area. Also, the spacer allows the air flow more room to "bend" around the butterfly into the runner. Did you ever try an open spacer? I've even heard of people running a 1/2" four hole on top of a 1/2" open spacer. I'm of the opinion that regardless of of the intake type you want a small open area directly between the manifold runner and the butterfly for the reason I stated above. But hey, what do I know ;)

Hi Ken,

No, all I tried is the 4-hole. I did try a Team G this summer and it liked the 4-hole spacer. However, ET with the single plane vs the dual plane slowed from 12.23 to 12.41. 60's increased from 1.85 to 2.05. In summary, the dual plane with no spacer was .40 better than the single plane with a 1" 4-hole spacer on my combo. It will be interesting to see what the single plane does for you.

Folks, just bear in mind that a single plane intake will meter differently from a dual plane intake. So you really can't do a good "back-to-back" test of a single plane using the indentical carb you took off the dual.

First the most obvious difference is carb size/ While a dual plane will allow use of a carb that is slightly bigger than should be, with a single plane, each cylinder sees all of the carb, not half as in the dual's case. A big carb will be quite noticeable with a open plenum intake.

Second is signal. The signal 'per venturi' is reduced with a single plane open plenum intake. Consequently, to maintain the engine's optimal A/F ratio, some jetting changes might be requried.

Now, y'all know I'm no expert at this, just an amatuer, but I think you'll find that a carb that is ideally suited for a dual plane will require a bit more pump shot and a bit less jetting when sitting on an open plenum.

My experience, for the record, is ONLY with the my setup, and the 3X2 specifically and NOT with ET or a dyno graph. SO FWIW. Guys who know Holleys have often asked me why the center carb is a bit on the rich side ( 73 jetting with a 095 PV), while the outboards are a bit lean ( 78 jetting/ PV blocked). Well the answer lies in that the center carb feeds a dual plane intake, , while the outboard carbs offer a straight shot at the adjacent cylinders. Its kinda both single/dual at the same time.

So again, I SPECULATE, that to achieve a good back-to-back result on the swap, you'd want to jet down a size or two, while at the same time giving a bit more pump shot.

If anyone has dyno-based A/F results to share in a back-to-back swap they can either prove or disprove my hypothesis and save us some time.

if you want all out performance, i'd say it's hard to beat a Dart. a buddy of mine picked up 38hp on the dyno when he swapped from his Team G to an out of the box Dart on his 477. it was a 15 to 1 motor though with 320cc Merlin heads. he went from 710 hp to 748 hp. graemlins/thumbsup.gif

My own 461 also picked up power on the dyno by changing from the RPM airgap to a Dart single plane. Gained 25hp and the increase started to come in at 4300. Below that, the airgap made more power.