Slant *       6       Forum
Home Home Home
The Place to Go for Slant Six Info!
Click here to help support the Slant Six Forum!
It is currently Thu Mar 06, 2025 3:11 pm

Unanswered topics | Active topics


» » Tech Q & A » Engine

All times are UTC-08:00



Post new topic  Reply to topic  Page 1 of 1
  [ 15 posts ] 
  Print view Previous topic | Next topic 
Author Message
TurboNick
 Post subject: 270 hp build
PostPosted: Wed Nov 03, 2010 1:08 pm 
Offline
2 BBL ''SuperSix''

Joined: Sat Apr 24, 2010 12:24 pm
Posts: 22
Location: Annapolis MD
Car Model:
Anyone have any 270 hp builds?

_________________
Slant 6 engines
Top
   
Reply with quote  
66aCUDA
 Post subject:
PostPosted: Thu Nov 04, 2010 8:16 am 
Offline
Board Sponsor & SL6 Racer
User avatar

Joined: Sun Jul 30, 2006 8:36 pm
Posts: 2432
Location: East Arkansas
Car Model:
Nick why 270? there are some 300 and some 250. And a lot of unknowns.
Frank

_________________
Scrapple: Because a mind is a terrible thing to waste.
73 Duster - Race Car
66 Dart Wagon - DD
178" FED
82 D150
All Slant powered
Top
   
Reply with quote  
TurboNick
 Post subject:
PostPosted: Thu Nov 04, 2010 10:11 am 
Offline
2 BBL ''SuperSix''

Joined: Sat Apr 24, 2010 12:24 pm
Posts: 22
Location: Annapolis MD
Car Model:
i dunno your right lol i just want to aim for 270.

_________________
Slant 6 engines
Top
   
Reply with quote  
Polara1974
 Post subject:
PostPosted: Thu Nov 04, 2010 11:32 am 
Offline
TBI Slant 6
User avatar

Joined: Mon Feb 21, 2005 8:25 am
Posts: 211
Location: Buenos Aires - Argentina
Car Model:
Do you get 300HP from normally aspirated Slants? Were can i check the basic fundations for this buildups? I Assume that this engines use high CR, Am I right?

_________________
Martin Zappettini
1974 Dodge Polara RT 318cu.
1965 Valiant III Coronado Slant Six 6-Pack (soon!!)
Top
   
Reply with quote  
TurboNick
 Post subject:
PostPosted: Thu Nov 04, 2010 11:47 am 
Offline
2 BBL ''SuperSix''

Joined: Sat Apr 24, 2010 12:24 pm
Posts: 22
Location: Annapolis MD
Car Model:
I know its possible to get 300 but its not streetable. I would love to just be able to run somewhere in the 12s. I think cam and added compression help alot as so does headwork. I wonder if anyone has gotten their crankshafts lightened?

_________________
Slant 6 engines
Top
   
Reply with quote  
Joshie225
 Post subject:
PostPosted: Thu Nov 04, 2010 11:59 am 
Offline
Supercharged
User avatar

Joined: Thu Jan 27, 2005 8:32 pm
Posts: 7834
Location: Portland-ish
Car Model: Fiat 500e
High compression ratios and long cam durations are needed to get much over 200hp. To run 12s in a normally aspirated full-weight street car is not a trivial task. Very good cylinder head work is a must. You can't neglect the chassis either. You must put the power to the ground effectively to run the numbers.

For a light crank start with a late model cast crank engine.

Go through the Engine FAQ. The engine build matrix should be informative. http://www.slantsix.org/forum/viewtopic.php?t=23314

_________________
Joshua
Top
   
Reply with quote  
66aCUDA
 Post subject:
PostPosted: Sun Nov 07, 2010 6:00 am 
Offline
Board Sponsor & SL6 Racer
User avatar

Joined: Sun Jul 30, 2006 8:36 pm
Posts: 2432
Location: East Arkansas
Car Model:
Hey Nick
So tell us about your plans. Then we can help fine tune things from there. What vehicle?
What is the purpose? What is the budget? Etc.
Frank

_________________
Scrapple: Because a mind is a terrible thing to waste.
73 Duster - Race Car
66 Dart Wagon - DD
178" FED
82 D150
All Slant powered
Top
   
Reply with quote  
robert west
 Post subject:
PostPosted: Sun Nov 07, 2010 1:45 pm 
Offline
4 BBL ''Hyper-Pak''

Joined: Mon Mar 03, 2008 5:38 am
Posts: 48
Car Model:
chassis set-up and power to weight ratio is the big part to running times like that.don't know the car you have but if budget is there fiberglass parts, light weight race seats,if using leafs super stocks,drags shocks front and rear,poly race fuel cell.using stuff like this I brought my duster down to 2600 lbs. and is still drivable.by bring the weight down it is also easier on the drivetrain.
Top
   
Reply with quote  
TurboNick
 Post subject:
PostPosted: Tue Nov 09, 2010 12:58 pm 
Offline
2 BBL ''SuperSix''

Joined: Sat Apr 24, 2010 12:24 pm
Posts: 22
Location: Annapolis MD
Car Model:
I just want a fast 225. I know it will not be streetable but im sure driving right down the street to my local car shows I would be fine. I have a 70 dart swinger

_________________
Slant 6 engines
Top
   
Reply with quote  
Rick Covalt
 Post subject: 320 Hp?
PostPosted: Tue Nov 09, 2010 3:23 pm 
Offline
Board Sponsor & SL6 Racer

Joined: Wed Oct 23, 2002 7:57 pm
Posts: 8809
Location: Waynesboro, Pa.
Car Model: 65 Valiant 2Dr Post
Mopar Muscle Magazine did an article on Romeo Furio's Slant 6 build up.It is still on their site with all the details. It got 300HP with Carb and 320 with fuel injection. I don't know if he ever ran it in a car, but I'm sure he can chime in and tell us. High compression and big cam are the order of the day. 300HP normally aspirated is a lot of horspower for our lowly slant. Remember the old saying, "Speed cost money;how fast do you want to go"

Rick

_________________
2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!
Image
12.70 @ 104.6
Image
Top
   
Reply with quote  
TurboNick
 Post subject:
PostPosted: Wed Nov 10, 2010 12:57 pm 
Offline
2 BBL ''SuperSix''

Joined: Sat Apr 24, 2010 12:24 pm
Posts: 22
Location: Annapolis MD
Car Model:
Yeah hey thanks for the article link I read the whole thing. Pretty wild. Yeah I dont care about money Im not working on a budget. Im assuming a roller cam would help me get close.

_________________
Slant 6 engines
Top
   
Reply with quote  
Dart270
 Post subject:
PostPosted: Thu Nov 11, 2010 5:45 am 
Offline
Board Sponsor & Moderator
User avatar

Joined: Mon Oct 21, 2002 11:08 am
Posts: 16864
Location: Blacksburg, VA
Car Model:
If you really have money to spend, the 1st thing to get is a great cylinder head. Call Mike Jeffrey in Nebraska (308-324-3576) and tell him you want a max effort head. With that head and the right parts combo, you can make 270+HP NA.

All other power parts will be secondary to this. He can get it done.

Lou

_________________
Home of Slant6-powered fun machines since 1988
Top
   
Reply with quote  
madmax/6
 Post subject:
PostPosted: Thu Nov 11, 2010 2:27 pm 
Offline
Turbo EFI

Joined: Tue Jan 06, 2004 11:21 pm
Posts: 1391
Location: long beach ca
Car Model:
Jeffries head and cam choice, K1 rods, Wiseco .104 oversize pistons, 600 Holley, external oil pump and electric water pump and I am right at 280 rwhp. Guzzi Mark
Top
   
Reply with quote  
Aggressive Ted
 Post subject:
PostPosted: Thu Nov 11, 2010 3:37 pm 
Offline
Supercharged
User avatar

Joined: Mon Jan 15, 2007 5:05 pm
Posts: 3767
Location: Black Diamond, WA
Car Model:
Mark,

What is the weight of your car now?
and what is your best time in the quarter mile?

_________________
Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG
Top
   
Reply with quote  
madmax/6
 Post subject:
PostPosted: Thu Nov 11, 2010 6:01 pm 
Offline
Turbo EFI

Joined: Tue Jan 06, 2004 11:21 pm
Posts: 1391
Location: long beach ca
Car Model:
Car with driver is 2355lbs.I went 11.50 at 115 mph at the hot rod reunion in Bakersfield.Mark
Top
   
Reply with quote  
Display posts from previous:  Sort by  
Post new topic  Reply to topic  Page 1 of 1
  [ 15 posts ] 

» » Tech Q & A » Engine

All times are UTC-08:00

Who is online

Users browsing this forum: No registered users and 19 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited