Tunnel Ram on a sbc - 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 06-17-2008, 11:24 PM
Registered User
 
Last photo:
Join Date: Apr 2008
Location: Benito MB canada
Posts: 95
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Tunnel Ram on a sbc

Still deciding whats gonna sit on top of my 383 stroker. So far its goin good the block checked out and machining has begun. I was wondering if tunnel rams kill as much tourqe as people say they do? Also has anyone else built a tunnel rammed 383, what kind of combination are you running and what kind of power are you getting? I'm looking at either a Dart or Weiand tunnel ram my heads are a set of trick flow 170's with some port work and 2.02/1.60 valves and the cam will be a comp roller either xr270 or xr 274. Any suggestions greatly apreciated. thanks, Jake

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-18-2008, 04:40 AM
Registered User
 
Last photo:
Join Date: Jun 2008
Location: NJ
Posts: 306
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i have a 383 with a weiand tunnelram in my 87 S10 i use a comp cam 292hyd.basicly stock heads (202 and 160 vavles installed) till i can get new ones i have a 3500 stall converter i put in a eagle stocker kit for the bottom end. the engine idles at 1300 any lower then 1000rpm and it stalls, or spits sputters. but I built my manly for cruse nights and shows tunnel rams look alsome, thats for sure and i have no complents with mine. pics of my s10 while it was flat black now in the shop getting sprayed HOK pravo purple metal flake. all depends what u wanna do with your ride i guess. go with the tunnelram
Attached Thumbnails
Click image for larger version

Name:	001.JPG
Views:	774
Size:	81.3 KB
ID:	30709  
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-18-2008, 12:27 PM
Registered User
 
Last photo:
Join Date: Apr 2008
Location: Benito MB canada
Posts: 95
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
smrat, what kind of power are you making with that thing. Ever had it on a dyno? What kind of cam and gears are you running? Does it cruise down theroad allright, my car is only a once a week driver not much more. The weiand tunnel ram is rated at 2500-8000 rpm i believe. And i think its the one i would like to use. Plus it would look so good with a blower style scoop out the hood of my car
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-18-2008, 04:30 PM
lg1969's Avatar
Google "Tunnel Ram 406"
 
Last photo:
Join Date: Oct 2007
Location: Bohemia, L.I.N.Y.
Age: 64
Posts: 1,060
Wiki Edits: 0

Thanks: 1
Thanked 22 Times in 19 Posts
Just be careful how large the carburetors are. For the street I use a pair of 390cfm Holley carb. in my chevelle. I would change the primary jets to 57
and a 6.5 single stage power valve. I used a blue pump cam and set it for #2 setting. With two carburetors you will get 780cfm. You will get good low end torque and strong midrange and top end. I do not recommend 450cfm for the street unless you are racing it at the tracks.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-18-2008, 06:22 PM
Registered User
 
Last photo:
Join Date: Apr 2008
Location: Benito MB canada
Posts: 95
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The weiand manifold is available in a single carb application so i was thinking of going that route with either a 750 or 850 double pumper holley.
[IMG]C:\Documents and Settings\Home\My Documents\My Pictures[/IMG]

well i cant figure out how to post pictures

Last edited by jake_arcticcat; 06-18-2008 at 06:36 PM.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-18-2008, 07:12 PM
tubbedz's Avatar
Registered User
 
Last photo:
Join Date: Jun 2007
Location: United States
Posts: 120
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Jake
You may be able to make it work. I recently had a tunnel ram combo on my street 355ci Chevy and it had torque as soon as you get on the gas through 7000rpm. It had 10:1 pistons, 461 fuelie heads ported with 2.02/1.60, 3000rpm stall, and 4.88 gears. The carbs were two 600cfm vacuum secondaries with 29" x 18.5" tires and the cam was a solid Isky grind with 254' duration. It idled at 900rpm with a mean cam lope and the low end would pull right off idle. The only problem I ran into was tuning the 600's...it took awhile. Jetting, squirters, pump cams and secondary activation took awhile to sort but if you're good with Holley's it shouldn't be a problem. In the end I added two NOS plates and stayed on the conservative side with 150 shot total. That engine would scream with rpm's !! I have since sold that motor to a circle track racer who buzzes the rpm's every weekend.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 06-19-2008, 12:07 AM
Registered User
 
Last photo:
Join Date: Apr 2008
Location: Benito MB canada
Posts: 95
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Well i've alreay got 4.10 gears in the car right now and will probably stay there unless i get around to putting in a ford 9 inch then i can go to what ever the motor wants. I'll be running a 3500 rpm stall for shure if i decide to stay with th automatic and a trans bake or line loc. Compression is gonna be 10 maybe 10.5 if i can get away with it on aluminum heads? Eventually it'll have large 1 3/4 headers and 4 inch exhaust out the side. So that leaves the cam? What do you guys think? definatly roller, Would like to be around the 500/500 mark if possible so my 77 camaro will realy boogie down the strip. Im also planning on taking her to a dyno for final tuning then ill know what i really got Thanks so far, keep the great advice comming
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 06-19-2008, 01:03 PM
Registered User
 
Last photo:
Join Date: Apr 2008
Location: Benito MB canada
Posts: 95
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Anyone got any cam sugestions?
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 06-19-2008, 03:46 PM
Registered User
 

Last journal entry: 41 WILLYS FRAME
Last photo:
Join Date: Jul 2007
Posts: 10,372
Wiki Edits: 0

Thanks: 1,545
Thanked 803 Times in 573 Posts
I ran two 600 on my 350,Did OK,But then I went to two 450's And it came alive!!! Two 450 is 900 cfm's Most good motors run very good at about 750 to 850.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 06-19-2008, 05:20 PM
Registered User
 
Last photo:
Join Date: Apr 2008
Location: Benito MB canada
Posts: 95
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
What about a single 850, do tunnel rams run good with single carbs i know weiand offers theres with a single carb top?
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 06-19-2008, 09:00 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 48
Posts: 10,366
Wiki Edits: 0

Thanks: 69
Thanked 752 Times in 664 Posts
Tunnel ram

Single four-barrel tops for tunnel rams are known to be about the worst intake set-up you can bolt together The best engine builder's in the country can't make them perform, mixture distribution is terrible, the four inner cylinders are pig rich and the four outers are lean.
The only set-up that works is a custom built sheetmetal ram that actually looks more like a 10" tall single plane intake.
Why they even still sell the single four tops is beyond me, maybe it's a case of giving the customer what they want despite the fact that it is about 6 steps in the wrong direction
Tunnel Ram is a waste of time unless you are targeting the additional power that they can make in the 6500-8500 rpm range, and it won't be with one of the typical "street rams" that clutter up Ebay.
The four Tunnel Rams that actually work are--
Edelbrock Pro Ram and Pro Ram II ( both out of production)
Weiand Team G Super Ram (designed by Grumpy Jenkins, out of production)
Edelbrock Victor Ram
Holley Pro Dominator Tunnel Ram
Go to the dragstrip and see if anybody fast is running a street tunnel ram, I can virtually gaurantee you won't find one

Last edited by ericnova72; 06-19-2008 at 09:05 PM. Reason: More info
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 06-20-2008, 10:29 AM
lg1969's Avatar
Google "Tunnel Ram 406"
 
Last photo:
Join Date: Oct 2007
Location: Bohemia, L.I.N.Y.
Age: 64
Posts: 1,060
Wiki Edits: 0

Thanks: 1
Thanked 22 Times in 19 Posts
My tunnel ram setup

This is what my using in my 69 chevelle 355cid edlebrock TR1X and a pair of Holley 390cfm. On the secondaries, I'm using metering blocks and change from a single feed to a dual feed setup. I've got a 11:1 406sbc that I'm replacing and using AFR heads with the same setup I'm using on the 355.
Attached Images
File Type: bmp MVC-004SS.bmp (264.1 KB, 165 views)

Last edited by lg1969; 06-20-2008 at 01:07 PM.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 06-20-2008, 09:22 PM
Registered User
 
Last photo:
Join Date: Jun 2008
Location: NJ
Posts: 306
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i have a 3500 B&M stall converter, 456 rear gears.i never tryed it on a dyno. i built it mostly for cruse nights and shows. it runs great but likes to drink gas too. sometimes i cheat and loosen the rear carb linkage srcew so the rear carb doesnt work till i need it. i dont notice any difference w/o the rear carb hooked up .if you use the wiend tunnel ram, you have to you use a small dist. mine is a MSD mech advance, i forget what the part number is now, call Jegs or Summit they can tell you.

Last edited by smrat; 06-21-2008 at 04:39 AM.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 06-21-2008, 04:41 AM
Registered User
 
Last photo:
Join Date: Jun 2008
Location: NJ
Posts: 306
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
IG1969, who did you take the manifold to for polishing?
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 06-21-2008, 05:48 AM
Stroke Meister
 
Last photo:
Join Date: Mar 2007
Location: MI, USA
Posts: 703
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Just this pas month a nice young man with a 355 S10 was having issue with his 'set-up', a 2 x 4 Tunnel Ram. Don't get me wrong, the thing was quick, but he listened and dumped his tunnel ram for a single Dominator. Night and day difference with driveability and performance.
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
tunnel ram set up advice/opinions needed please pal Engine 22 03-22-2013 04:53 PM
SBC tunnel ram w/2x450 holleys problems rodnok1 Engine 7 10-12-2010 04:54 PM
Tunnel Ram information xntrik Engine 79 08-17-2008 03:15 PM
Tunnel ram carb selection baddbob Engine 2 07-09-2007 09:05 AM
Big Block Tunnel Ram 2X4 Question 74NovaRat Engine 12 01-28-2005 02:22 PM


All times are GMT -6. The time now is 11:25 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.