Race Car Tech Discuss anything related to road racing and auto X.

12a build questions?

Old 06-16-07, 06:45 AM
emissions r teh sux
5 Year Member
Thread Starter
iTrader: (2)
rotornoob's Avatar
Join Date: Dec 2005
Location: Stockton Ca
Posts: 889
Likes: 0
Received 0 Likes on 0 Posts
12a build questions?

ok so my engine in my 82 s has a dowel pin leak and im planning o fa rebuild, but this is my question. Is it possible to build a NA 12a up to about 160 RWHP? what is the estimated cost? what parts will i need? i would love to remain stock port if possible, but im willing to compromise if need be.
rotornoob is offline  
Old 06-16-07, 10:41 AM
malignant narcissist
iTrader: (2)
diabolical1's Avatar
Join Date: Feb 2002
Location: FL
Posts: 9,458
Received 58 Likes on 54 Posts
to get there without forced induction of some sort, you're going to have to do some porting. period.
diabolical1 is offline  
Old 06-16-07, 11:27 AM
Cone? What cone?
5 Year Member
engled's Avatar
Join Date: Sep 2004
Location: Birmingham, Alabama
Posts: 65
Likes: 0
Received 0 Likes on 0 Posts
My stock 12a with RB intake, RB Holley, RB road race Exhaust, put down 125rwhp and 101ftb of torque. That's a long from 160rwhp, without porting I just don't see it. But I would love to see it done
engled is offline  
Old 06-17-07, 07:00 PM
Banned. I got OWNED!!!
christaylor's Avatar
Join Date: Mar 2003
Location: Austin, Texas
Posts: 1,546
Likes: 0
Received 0 Likes on 0 Posts
The bottom line is I dont think anybody goes for more power without porting. It's just too easy. I'm sure if you lightened the e-shaft and rotors to their bare minimum, used Japanese irons (assuming thats where the extra power they make comes from), run a big Weber, hot ignition, and 3" exhaust with a good header you could get to 150, but I think thats probably about the highest "realistic" number.

...Unless you're talking about crankshaft, then I think its easy! My Spec7's make over 130 at the rear wheels (corrected) with all "stock" parts.
christaylor is offline  
Related Topics
Thread Starter
Last Post
Old School and Other Rotary
10-01-18 08:07 AM
New Member RX-7 Technical
07-18-17 02:30 PM
1st Generation Specific (1979-1985)
11-17-15 05:57 PM
Introduce yourself
08-27-15 07:56 AM

Thread Tools
Search this Thread
Quick Reply: 12a build questions?

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: