bench race air dyno my 489 - 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 10-23-2012, 04:22 PM
Member
 

Last journal entry: was hoping for better than this
Last photo:
Join Date: Mar 2012
Posts: 265
Wiki Edits: 0

Thanks: 16
Thanked 20 Times in 20 Posts
bench race air dyno my 489

I'm going to put together (fingers crossed) this winter my bbc stoker

looking on picking a few peoples brains.. as I'm sure a lots changed since 2002 when I bought all the parts for this build...
it's a standard bore 4 bolt 454 that will be bored 30 over and to piston to wall clearance that srp list for the pistons..
the pistons are dome type yeilding a 10.2 to 1 static compression with 118cc heads... my heads are 121cc
srp doesn't list it but I'm going to guess that their compression listing is with the piston at zero deck...
the intake is a dart single plane.. picked single plane as I plane on efi down the road and it's not going to loose to much low end at 489 c.i.d.. and in efi.. it not be much of a factor..
the heads are darts pro 1's 345cc(not cnc ported) but will be port matched to intake gaskets the intake valve is 2.3" and the port flows398 @.800lift/28"
the exhaust port is raised .3" and exhaust valve is 1.88" and port flows 266cfm port is 129cc

the cam is a solid roller


I have a 3 piece timing cover and the "hex-a-just" timing set to play with the timing to "dial in the power" at the track..

I haven't done anything but have the block magged..
in an engine like this what to I leave on the table not bringing the piston deck to zero?
untill efi I have 5 carbs to test on it.. 3310 750 vac 2nd, a 750 d/p and a 850 full race bearclaw, a 800 cfm q jet, and a standard q jet,
I have 2 dissy's a MSD billet and a g.m. points type converted with a crane convertion kit..
the bottom end is all good stuff as I plan on spray (2 stage)
lunati crank (4.25" stroke) and crowler rods (6.385")
full rollerized s/s rockers and arp everything... and march serp belt system...
windage control /etc/etc

what you say... bench race this...
was going in my 70 chevelle, but thats gone.. so it'll be in my 71 c-10 3800 lb's, th400 g/v and reargear up in the air, stall converter I have is 3300-3500...
anyone have a dyno sim.. to get a over inflated hp/ft lb numbers out of..

should I look at different cams?
truck will be a weekend toy/ summer toy with some track time..
spray will be after I get it to hook on its own.. if that ever happens..

Flame suit on
computer dynos go..

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-23-2012, 04:26 PM
Registered User
 
Last photo:
Join Date: Jul 2004
Location: At Speed
Age: 51
Posts: 1,340
Wiki Edits: 0

Thanks: 2
Thanked 27 Times in 27 Posts
625hp
550ftlb
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-23-2012, 04:28 PM
Member
 

Last journal entry: was hoping for better than this
Last photo:
Join Date: Mar 2012
Posts: 265
Wiki Edits: 0

Thanks: 16
Thanked 20 Times in 20 Posts
Quote:
Originally Posted by lmsport View Post
625hp
550ftlb
my 454 at 8.75 to 1 made 525 ft lb and 500hp
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-23-2012, 04:34 PM
35WINDOW's Avatar
Member
 

Last journal entry: Dash Mock-up
Last photo:
Join Date: Dec 2004
Location: utah
Age: 59
Posts: 1,395
Wiki Edits: 0

Thanks: 7
Thanked 21 Times in 19 Posts
I'll say 675 hp
680# TQ

It should definitely put a dent in your Wallet (buying Tires! )

For comparison's sake, I have something kinda similar, in that the Duration is the same (.248/.254 @ .050 & 110 LSA), 10.2:1, however my Lift is .680, my Heads are AFR 315's and it's a 540-my Engine put out 775.5 hp & 740# TQ-
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-23-2012, 04:43 PM
hcompton's Avatar
Old & Furious
 
Join Date: Oct 2012
Location: MD
Age: 41
Posts: 1,074
Wiki Edits: 0

Thanks: 6
Thanked 87 Times in 84 Posts
Looks good i dont know much about big chevy but you seem to have all the bases covered. Cam doesnt look whimpy at least. I have never installed a cam too big just valves that were too small. LoL

Did you have the cam and crank lined bored. I hear it is a problem with big chevy. That is why aftermarket blocks are such good sellers.

The closer your going to come to 500 cubes or more the bigger the cam needs to be. Just as a rule but nothing to help on big chevys.

This is the standard for engine math and performance tuning. If you really want to calculate it all out.
Four-Stroke Performance Tuning: Fourth edition: A Graham Bell: 9780857331250: Amazon.com: Books Four-Stroke Performance Tuning: Fourth edition: A Graham Bell: 9780857331250: Amazon.com: Books
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-23-2012, 04:59 PM
Registered User
 
Last photo:
Join Date: Jul 2004
Location: At Speed
Age: 51
Posts: 1,340
Wiki Edits: 0

Thanks: 2
Thanked 27 Times in 27 Posts
Quote:
Originally Posted by E.Furgal View Post
my 454 at 8.75 to 1 made 525 ft lb and 500hp
I'm assuming a 750 carb as I dont know what a 850 bearclaw is.
Head probably only flows about 340 at 0.600in lift.
Cam is too small for a really big hp number but will run well on the street. With a bigger cam, and more compression, you could get 750hp.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 10-23-2012, 05:06 PM
Member
 

Last journal entry: was hoping for better than this
Last photo:
Join Date: Mar 2012
Posts: 265
Wiki Edits: 0

Thanks: 16
Thanked 20 Times in 20 Posts
Quote:
Originally Posted by lmsport View Post
I'm assuming a 750 carb as I dont know what a 850 bearclaw is.
.
ever hear of a guy called barry grant

or his later line of carb demons
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 10-23-2012, 05:28 PM
hcompton's Avatar
Old & Furious
 
Join Date: Oct 2012
Location: MD
Age: 41
Posts: 1,074
Wiki Edits: 0

Thanks: 6
Thanked 87 Times in 84 Posts
Is the race carb street able. They usally arent. I would go big. 750 dp is a great carb in your hp range but if your going for big power might as well get it out of the way early since you will have to put in tuning time on any carb.

The edelbrock 800 carb i had on my poncho was always too small. Had a holley projection 1000 cfm and it was terrible junk but wot worked. So as long as it was floored it made power. But it was never an issue of too much flow making the engine hit soft down low even with the big throttle body. It was nasty down low. 245 tires were not even noticed by the engine. If it coughed which the projection did all the time it would blow the tires away. Like the car sneezed. Boug-roar-screech

If you had a 1050 dom i would say to run that.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 10-23-2012, 05:30 PM
Registered User
 
Last photo:
Join Date: Jul 2004
Location: At Speed
Age: 51
Posts: 1,340
Wiki Edits: 0

Thanks: 2
Thanked 27 Times in 27 Posts
Quote:
Originally Posted by E.Furgal View Post
ever hear of a guy called barry grant

or his later line of carb demons
Ooh yeah, that guy.
The last sooper-duper BG carb I dynoed would not maintain a consistent A/F ratio after sending it back to be rubbed on a few times.
I use Willys or Braswell cuz I dont have time to straighten out some shiny carb from Summit.
I have built and dynoed almost the same engine you want to build, except the cam I used was even smaller for use in a daily driven car, the disp was 496, and the intake was a dual plane. That engine made 575hp on pump 93.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 10-23-2012, 05:46 PM
Member
 

Last journal entry: was hoping for better than this
Last photo:
Join Date: Mar 2012
Posts: 265
Wiki Edits: 0

Thanks: 16
Thanked 20 Times in 20 Posts
Quote:
Originally Posted by lmsport View Post
Ooh yeah, that guy.
The last sooper-duper BG carb I dynoed would not maintain a consistent A/F ratio after sending it back to be rubbed on a few times.
I use Willys or Braswell cuz I dont have time to straighten out some shiny carb from Summit.
I have built and dynoed almost the same engine you want to build, except the cam I used was even smaller for use in a daily driven car, the disp was 496, and the intake was a dual plane. That engine made 575hp on pump 93.
oh, so you're use'n 3000.oo carbs.. how much for that bridge again?
the bearclaw and demons pre 2009 are fine.. like everyone else he started cutting corners to stay in biz.. it didn't work..
as far as "that guy"
he IS the reason holleys carbs are 100x better than the garbage they sent out the door before he came along.. it forced holley to make better parts..
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 10-23-2012, 06:01 PM
Registered User
 
Last photo:
Join Date: Jul 2004
Location: At Speed
Age: 51
Posts: 1,340
Wiki Edits: 0

Thanks: 2
Thanked 27 Times in 27 Posts
Quote:
Originally Posted by E.Furgal View Post
oh, so you're use'n 3000.oo carbs.. how much for that bridge again?
the bearclaw and demons pre 2009 are fine.. like everyone else he started cutting corners to stay in biz.. it didn't work..
as far as "that guy"
he IS the reason holleys carbs are 100x better than the garbage they sent out the door before he came along.. it forced holley to make better parts..
On a real racing engine...yes, I have spent over $3k for a single carb. I have spent $4k on a gauge legal two barrel for a LMSC engine just to get 10hp more than a $2k carb.

I gave away the 850 BG I mentioned and I would not take another one if they were free. Good luck with your project.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 10-23-2012, 08:34 PM
Member
 

Last journal entry: was hoping for better than this
Last photo:
Join Date: Mar 2012
Posts: 265
Wiki Edits: 0

Thanks: 16
Thanked 20 Times in 20 Posts
Quote:
Originally Posted by lmsport View Post
On a real racing engine...yes, I have spent over $3k for a single carb. I have spent $4k on a gauge legal two barrel for a LMSC engine just to get 10hp more than a $2k carb.

I gave away the 850 BG I mentioned and I would not take another one if they were free. Good luck with your project.
love the way you compair a 2-3-4 thousand dollar piece to a 350.oo-550.oo one.. comical at best

want to compair a 20 dollar cast piston to a 190.oo one next..
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 10-23-2012, 08:43 PM
327NUT's Avatar
Registered User
 
Last photo:
Join Date: Dec 2004
Location: So. Utah
Age: 67
Posts: 3,258
Wiki Edits: 0

Thanks: 0
Thanked 77 Times in 69 Posts
What are "crowler rods"
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 10-23-2012, 08:56 PM
Member
 

Last journal entry: was hoping for better than this
Last photo:
Join Date: Mar 2012
Posts: 265
Wiki Edits: 0

Thanks: 16
Thanked 20 Times in 20 Posts
Quote:
Originally Posted by 327NUT View Post
What are "crowler rods"
a typo..
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 10-23-2012, 09:06 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 7,822
Wiki Edits: 0

Thanks: 313
Thanked 749 Times in 720 Posts
Im going to guess 700 hp plus or minus depending on final choice of parts. The 106 icl is curious for that large of engine.Use an 850 X as a minimum size.The flow numbers are important for a better guess.
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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
Pump Gas Versus Race Gas / dyno results ?? fastlaners Engine 8 04-30-2011 10:51 PM
California Air Pollution car race info and history ?? xxllmm4 Hotrodders' Lounge 4 02-01-2009 04:35 PM
dyno info on 7 BBC race heads on a 502 crate mill bullheimer Engine 1 04-08-2008 08:14 AM
New combo, lets bench race. curtg21 Engine 9 01-25-2008 12:59 PM
drag race air bag 68chevelle_ss Suspension - Brakes - Steering 5 06-03-2004 07:10 AM


All times are GMT -6. The time now is 03:04 PM.


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.