Weiand Stealth or Victor jnr? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 06-27-2008, 02:56 AM
Registered User
 
Last photo:
Join Date: May 2008
Location: New Zealand
Age: 42
Posts: 165
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Weiand Stealth or Victor jnr?

Hey petrol heads, back again. Here is my engine specs, 400ci small block chev .040" over, splayed four bolt main caps, Crower forged steel crank, Scat 5.7" rods, KB hyperutectic flat top pistons, deck height -.003", compression ratio 10.3/1, AFR eliminator 195 cyl heads, weiand stealth manifold, 750 vac holley and HEI dizzy with a 6AL MSD. Cam is a Lunati 60105 with .525" intake lift and .546 exhaust lift, intake duration is 241 @ .050" and exhaust is 249 @ .050". The company that supplied me the heads recommended I get rid of the Weiand Stealth and replace it with a Victor Jnr. They claim it would be fine with the Stealth, but perform even better with a Victor Jnr. I dont want my engine to get peaky, but they said I would barely lose any low down. Is the Victor Jnr any taller? I can only just fit the Weiand Stealth under there. Also my headers are only 1 5/8", but they say they will be fine. Im hoping for around 480hp and 500ft/lbs, but not sure what to expect just yet. My car is 3000lbs with a 3000rpm stall, 350TH shift kitted trans and 3.25/1 gears.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-27-2008, 03:14 AM
SSedan64's Avatar
Registered User
 
Last photo:
Join Date: Dec 2007
Location: Macon, GA.
Age: 50
Posts: 6,016
Wiki Edits: 0

Thanks: 0
Thanked 46 Times in 46 Posts
With finely tuned ignition timing & carb you probably wouldn't lose much bottom end torque. The cam you have will like the Victor Jr. The Vic Jr. is taller than the Stealth tho'
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-17-2008, 02:01 AM
Registered User
 
Last photo:
Join Date: May 2008
Location: New Zealand
Age: 42
Posts: 165
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Holdon

Quote:
Originally Posted by SSedan64
With finely tuned ignition timing & carb you probably wouldn't lose much bottom end torque. The cam you have will like the Victor Jr. The Vic Jr. is taller than the Stealth tho'
Hey mate, I went out and bought a Victor jr finally, so now I have both manifolds sitting here. Interesing thing is you said the Victor jr is taller, but after sitting it on the engine it's actually 4mm shorter. Im still not convinced on which to use, the Victor or my Weiand Stealth. Maybe try them both when I have the car on the dyno and sell the one I dont want. Only that means I wont bother getting in with the grinder and port matching untill Ive decided I guess. Wouldnt a dyno in your workshop be so handy!!! Haha.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-17-2008, 07:50 AM
racecar100's Avatar
Registered User
 
Join Date: Feb 2008
Location: Tennessee
Age: 54
Posts: 255
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I think you'll be more happy with Weiand Team G over the Victor JR.. The Team G will have more low end torque and same top end HP over the Victor Jr.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-17-2008, 01:56 PM
Member
 
Last photo:
Join Date: Dec 2004
Location: San Antonio, Texas
Age: 50
Posts: 4,023
Wiki Edits: 0

Thanks: 0
Thanked 23 Times in 23 Posts
First of all, I think you need at least a 3.73 gear. 3.25 is not enough.

I compared a Performer RPM to a Team G on a 11:1 cr 362 sbc, 244/244 cam, 200cc dart heads, 3.90 gear, 5 spd manual, 175 hp n20, 2800lbs with driver. And I preferred the RPM intake over the single plane Team G. I felt a torque lost even with all those gears and light weight car.

what did afr say about the cam? why run more exhaust duration with those heads?
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-17-2008, 02:15 PM
Registered User
 
Join Date: Nov 2004
Location: California
Age: 67
Posts: 831
Wiki Edits: 0

Thanks: 27
Thanked 23 Times in 20 Posts
With that much cam, I have to think that the Victor Jr will work better with the cam and the heads, overall, and that a set of 1 3/4 inch headers would give you an additional boost.

Pat
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-17-2008, 02:27 PM
Member
 
Last photo:
Join Date: Oct 2004
Location: IL
Age: 47
Posts: 238
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I've had a vic jr and a rpm on basically the same engine, With 3.25 gears I'd say the stealth.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 07-17-2008, 02:51 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 47
Posts: 9,448
Wiki Edits: 0

Thanks: 29
Thanked 482 Times in 437 Posts
I've run an Air Gap and a Victor JR both on a 400 very similar to yours(except solid 260/266* @ .050 .585" lift solid and forged pistons w/Dart 200cc heads) and had more torque than I could put to the ground with TH400 3800 stall 4.56 gear. Vic JR w/1" spacer seemed just as strong down low but noticably stronger up high, then switched to 950 Holley trying to kill some low end power Running 11.50's in 1/4 on pump gas at 3550lbs driving it 75 miles to the track, was in 12.60's at first before tuning. I was always looking for ways to trade some of the low end for top end to kill some wheel spin(was running on 10" tread street legal dirt tracker rubber McCreary/American Racer IMCA tire). 60' times in the 1.6 second range. Switched from 1 5/8" to 1 3/4" headers, no real change down low, just helped up high. I'd use the Victor JR if it was me.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 07-17-2008, 03:42 PM
Member
 
Last photo:
Join Date: Dec 2004
Location: San Antonio, Texas
Age: 50
Posts: 4,023
Wiki Edits: 0

Thanks: 0
Thanked 23 Times in 23 Posts
Quote:
Originally Posted by ericnova72
I've run an Air Gap and a Victor JR both on a 400 very similar to yours(except solid 260/266* @ .050 .585" lift solid and forged pistons w/Dart 200cc heads) and had more torque than I could put to the ground with TH400 3800 stall 4.56 gear. Vic JR w/1" spacer seemed just as strong down low but noticably stronger up high, then switched to 950 Holley trying to kill some low end power Running 11.50's in 1/4 on pump gas at 3550lbs driving it 75 miles to the track, was in 12.60's at first before tuning. I was always looking for ways to trade some of the low end for top end to kill some wheel spin(was running on 10" tread street legal dirt tracker rubber McCreary/American Racer IMCA tire). 60' times in the 1.6 second range. Switched from 1 5/8" to 1 3/4" headers, no real change down low, just helped up high. I'd use the Victor JR if it was me.

Your combo is much different. 20 more degrees of cam duration and a 4.56 gear versus a 3.25 gear. I'm sure your combo worked well with a victor Jr. But if you only had a 240 degree cam and 3.25 gears, then a high rpm dual plane should be better.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 07-17-2008, 03:58 PM
Member
 
Join Date: Dec 2004
Location: Madison, WI
Posts: 1,885
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
In over 10 years of dyno testing I know for a fact I have never seen a Victor outperform a good dual plane under 4500. I'd say 5000 to 5200 but would need to actually look at all the past data, which of course I don't have.

For that size cam in that size engine on dyno session I'd put $100 on the dual plane being a MUCH better overall intake than a Victor. Especially under 4500. Not until you are well close to 5800 to 6000 RPM will the Victor show anything worth mentioning. I'd suspect, know that combo is just about ready to fall over at that point.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 07-17-2008, 05:43 PM
TorkMonster400's Avatar
uninteresting default message
 
Last wiki edit: Working with chromed bolts
Last journal entry: A couple of pics of the car
Last photo:
Join Date: Mar 2008
Location: Fort Walton Beach Fl
Posts: 236
Wiki Edits: 4

Thanks: 0
Thanked 0 Times in 0 Posts
I just got my Airgap in the other day I love it and can't wait to put it on I did a bit of research and a lot people run the Airgap with great results, and it fit my rpm range perfect
Attached Thumbnails
Click image for larger version

Name:	DSCN0704b.jpg
Views:	68
Size:	117.6 KB
ID:	31265   Click image for larger version

Name:	DSCN0703b.jpg
Views:	64
Size:	103.9 KB
ID:	31266  
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 07-18-2008, 02:45 AM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 47
Posts: 9,448
Wiki Edits: 0

Thanks: 29
Thanked 482 Times in 437 Posts
I guess the point I should have made was that the 400 will REALLY have much more torque than the more common 350's. I initially built the combo I mentioned with a 247/252*@ .050 .528" lift and 3.23 gears and had more torque than could be used. I changed to the bigger cam and carb trying to kill low end and added the 4.56 gear to bracket race with. If you've built almost any good headed 400 combo you would understand what I mean--low end torque(off idle to 4000rpm) is the least of your build parameters to consider. It's like the difference in torque between a 283 and a 350, or a 396 and a 454. 260/266* dur @.050 is only middle of the road for a 400 solid cam application. The only reason I would look for low end torque is to pull a trailer with 3.23 gears and not have the tranny kick down a gear when I went to pass someone on the highway. With a 3000 pound car and 500ft/lbs all you will get is tire smoke without 12"+ slicks, street radials don't have a prayer.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 07-18-2008, 10:40 PM
Registered User
 
Last photo:
Join Date: May 2008
Location: New Zealand
Age: 42
Posts: 165
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Holdon

Quote:
Originally Posted by racecar100
I think you'll be more happy with Weiand Team G over the Victor JR.. The Team G will have more low end torque and same top end HP over the Victor Jr.
That maybe true, but Ive already got these two manifolds here and am not that keen on paying for a third.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 07-18-2008, 10:57 PM
Registered User
 
Last photo:
Join Date: May 2008
Location: New Zealand
Age: 42
Posts: 165
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Holdon

Quote:
Originally Posted by 454C10
First of all, I think you need at least a 3.73 gear. 3.25 is not enough.

I compared a Performer RPM to a Team G on a 11:1 cr 362 sbc, 244/244 cam, 200cc dart heads, 3.90 gear, 5 spd manual, 175 hp n20, 2800lbs with driver. And I preferred the RPM intake over the single plane Team G. I felt a torque lost even with all those gears and light weight car.

what did afr say about the cam? why run more exhaust duration with those heads?
You might have noticed a torque loss on a 362ci sbc, but I dont think it would be comparable to a 408ci sbc with the bigger stroke. From all the feed back Im getting it seems like a torque loss is the last of my worries after all. Ive also heard that 400+ci sbc's with their faster piston speed and bigger demand for air will love the greater flow if the single plane. Such a big learning curve, seems like everybody has different opinions and results and no too engines are the same!
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 07-18-2008, 11:01 PM
Registered User
 
Last photo:
Join Date: May 2008
Location: New Zealand
Age: 42
Posts: 165
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Holdon

Quote:
Originally Posted by 454C10
First of all, I think you need at least a 3.73 gear. 3.25 is not enough.

I compared a Performer RPM to a Team G on a 11:1 cr 362 sbc, 244/244 cam, 200cc dart heads, 3.90 gear, 5 spd manual, 175 hp n20, 2800lbs with driver. And I preferred the RPM intake over the single plane Team G. I felt a torque lost even with all those gears and light weight car.

what did afr say about the cam? why run more exhaust duration with those heads?
Oh and also about the cam, I gave the cam supplier (Summit) a complete list of my engine specs and said I wanted hp figures in the high 400s with gobs of usable midrange torque and thats the cam they recommended.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 04:05 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.