another hp estimate... - 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> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 07-11-2008, 09:49 PM
Registered User
 
Join Date: Jul 2008
Location: spartanburg, sc
Posts: 18
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
another hp estimate...

I was wondering if sombody out there had a comp dyno estimate deal they could run my numbers and see what it says.

400 small block chevy, 40 over. 5.7" rods, 11.1 compression, 180cc air flow research heads. 280/280 cam with .480 lift. holley 650 carb, dual plane intake, 1 5/8 headers 2.5" exhaust. hmm bout all i can think of right now haha.

if you need more information I can look it up quick. I appreciate the help guys, btw I'm a newbie to the site too.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-11-2008, 10:10 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 47
Posts: 7,617
Wiki Edits: 0

Thanks: 8
Thanked 140 Times in 129 Posts
CamQuest says 399HP@5000rpm 455TQ@4000rpm. With bigger carb(750)bigger intake(RPM Air Gap) this will jump to 475HP@5500rpm 500TQ@4500rpm.
IMO carb, cam, intake, and heads are all too small for an 11-1 400.
What are your goals for this engine?
It won't run on pump gas at that compression ratio with that small of a cam.
Get rid of the "girly" cam!

Lots more info on motor, car, trans,converter, rear gear would be helpful.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-11-2008, 10:17 PM
NEW INTERIORS's Avatar
Believe in yourself !!!!!!
 

Last journal entry: 41 WILLYS FRAME
Last photo:
Join Date: Jul 2007
Location: In My Shop..
Age: 48
Posts: 9,811
Wiki Edits: 0

Thanks: 987
Thanked 429 Times in 326 Posts
Welcome aboard !!!!!
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-12-2008, 06:28 PM
Everything is HAMMER!
 
Last photo:
Join Date: Jan 2006
Location: belleville, Michigan
Age: 24
Posts: 345
Wiki Edits: 0

Thanks: 2
Thanked 1 Time in 1 Post
180's seem kinda small for a 400, i think 195's would've been a better choice.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-12-2008, 10:23 PM
Registered User
 
Join Date: Jul 2008
Location: spartanburg, sc
Posts: 18
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
well i'm really just re-using all the topend stuff. See i had a 350 with all this stuff on it, and found a crack in that block. So I decided to build a 400 instead of the 350, I just always wanted to build one.

I agree especially with the intake and carb being too small, and even the cam, the heads wouldn't hurt to be bigger, but i don't think they are killing me too bad.

As far as the goals for the motor, it's in a 4-speed elcamino with a 3.73 out back, the car used to be a daily driver but it's now just my weekend warrior. I'm dieing to hit the dragstrip too, i'm sure it'll see lots of passes once back on the road.

when you ran the dyno test, could you put in flow numbers for the heads and such?

here's an intresting article that has a fairly similar setup...
http://www.chevyhiperformance.com/te...ild/index.html
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-13-2008, 01:37 AM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 47
Posts: 7,617
Wiki Edits: 0

Thanks: 8
Thanked 140 Times in 129 Posts
When I ran the simulation I pulled the flow #'s from AFR's site for the 180 Street package, not the race package, cam was 280 dur (230 @ .050) .480" lift, RPM air gap intake w/750 carb. This gave a very similar # (475HP/500TQ) as the article you have posted before they put the 1.6 ratio rockers on it.
The lower #'s (399HP/455TQ) I posted were with a plain Performer intake and the 650 carb you listed in your first post( I just took a guess on the intake).
Put a 254 @ .050" .550" lift solid cam in and watch the power jump to 540HP or so still not having to turn the motor over 6300 rpm.
They are using the CNC ported version in the article w/ 9.5-1 compression, which amounted to a trade-off/ cancel-out with your 11-1 compression and non-CNC heads. It's a good combo regardless , I just don't like hydraulic cams. Give me a solid or roller any day
Edit: +++ on the solid with a 4-speed, but if it's a saginaw it won't last long with the 400 and power shifts, no matter what cam. Don't forget if going to the track you have to have a blow-proof bellhousing W/ block plate
The 650 carb( is it a Double Pumper?) would work OK on a Victor JR intake or with a 1" spacer on the Air Gap so that each cylinder could "see" all 4 barrels, but the 750 would just be a little better. Hope these are Holleys because Edelbrock carbs suck IMO .

Last edited by ericnova72; 07-13-2008 at 01:50 AM. Reason: more info
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-13-2008, 06:59 AM
Registered User
 
Join Date: Jul 2008
Location: spartanburg, sc
Posts: 18
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I've always been under the immpression my heads should be fully cnc'd, I didn't know they made some that weren't. and I love the idea of a solid cam, I'll keep the one i got for the time being prolly just due to budget, but it won't be long i'll be changing that. I've heard the comp cams xe 282 girnd is a good cam for what i'm wanting, what you think?

oh it's a muncie m21 in there, i reuilt her bout 2 years ago, and man does she shift nice!! oh I love that thing haha.

You ever heard of a holley contender intake...that's what i've got now, they say it's "good" up to 7200 rpm. but it is still a dual plane, it's just a tall dual plane. I have been thinking bout getting a victor jr though.

what do you think i will most likely have to do with gas... mix 93 with some race gas?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 07-13-2008, 07:02 AM
Registered User
 
Join Date: Jul 2008
Location: spartanburg, sc
Posts: 18
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I forgot, yeah it's a newer holley double pumper
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 07-13-2008, 03:01 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 47
Posts: 7,617
Wiki Edits: 0

Thanks: 8
Thanked 140 Times in 129 Posts
Standard AFR package was 70% CNC intake port(port entry and valve bowl but not entire runner) 100% exhaust port and 100% chamber. Couldn't find XE282 cam, did you mean XE284? It's better than what you have now.
Holley Contender is pretty much the same as Edelbrock Performer RPM, as long as it is not more than about six years old(design upgraded)will work fine- use a 1" spacer!!
Probably have to mix 10 gallons 93 pump w/ 3gallons 110 race leaded which will put octane right around 98, motor should run fine at 96 octane, so this gives a little safety factor.
Did your Elky come with the 4-gear(Muncie?), or did someone swap it in?
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 07-13-2008, 06:45 PM
Registered User
 
Join Date: Jul 2008
Location: spartanburg, sc
Posts: 18
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Nah my elsky came factory with no ac and the three speed on the floor (all powered by the good ole v6 haha) yeah it was a bit of a base model i guess, which is why i like it. my step dad and I put in the muncie when i first started driving.

the cam is kinda hard to find, it is a xe 282, it's a solid cam, here's the part number i believe...(12-678-4)...
what's a good way to look for cams, it's so hard to know what all is out there...
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 07-13-2008, 08:06 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 47
Posts: 7,617
Wiki Edits: 0

Thanks: 8
Thanked 140 Times in 129 Posts
My bad, thought you were just looking for a bigger hydraulic when you said XE, the solids are listed as XS but I found what you were referring to. It's not a bad cam, I would personally go one bigger to the XS290S. You have to remember that in the catalog the recommended RPM ranges are listed for a 350(the most common SBC) and you will need to lower all those recommended rpm ranges 4-500 because you have 50 more cubic inches to feed. I love 400's and don't like to build anything smaller than a 383. The cam you picked will probably be better if the car is more "street" than "track", and I'm a bit hardcore.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 07-14-2008, 08:36 PM
Registered User
 
Join Date: Jul 2008
Location: spartanburg, sc
Posts: 18
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Hey, I know this is getting a little off topic, but i'm curious. can you run the dyno test again, but this time with a .30 over 350.( it wouldn't be as high compression, prolly less than 10 to 1) That would be my old motor combination that i just took apart. I drove that thing for a few years like that and i'd love to know what the computer says about the hp and tq...
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 07-14-2008, 08:53 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 47
Posts: 7,617
Wiki Edits: 0

Thanks: 8
Thanked 140 Times in 129 Posts
350= 398hp@6000/410tq@4000
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 07-15-2008, 04:00 PM
Registered User
 
Join Date: Jul 2008
Location: spartanburg, sc
Posts: 18
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
thanks man, I got another question, I think my step dad might have an edelbrock torker intake just laying around, at least i think that's what he had on his car. If i could bolt that on my motor, you think it'd be better than the contender?
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 07-15-2008, 09:52 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 47
Posts: 7,617
Wiki Edits: 0

Thanks: 8
Thanked 140 Times in 129 Posts
No way, Torker is junk, Even the man who was working at Edelbrock when they were designed( Joe Sherman, the winner of PopularHotRoddings first Engine Masters Challenge) comes flat out and says they are junk. They were a product poorly developed for a "percieved" market. Stay with what you have now, go to an Air Gap style, or a Victor JR.
Reply With Quote Quick reply to this message

Recent Hotrodding Basics 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
how much HP my engine have? bigpapagun Hotrodding Basics 11 10-19-2004 04:11 PM
HP Estimate 2wld4u Engine 7 09-08-2004 05:32 PM
A few changes to 540 hp carcraft buildup... what kind of hp loss? guesstimates please elukas Engine 16 08-07-2003 07:54 PM
didn't know where to ask this but HP and TQ relationship? stonedchihuahua Hotrodders' Lounge 11 12-14-2002 03:02 PM


All times are GMT -6. The time now is 04:09 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.