Making an airbox?? - LS1TECH - Camaro and Firebird Forum Discussion

Notices
Generation IV External Engine LS2 | LS3 | LS7 | L92 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

Making an airbox??

Old 05-11-2010, 07:43 AM
  #1  
10 Second Club
Thread Starter
 
lstvr's Avatar
 
Join Date: Nov 2007
Location: Birmingham UK
Posts: 445
Default Making an airbox??

I am going ITB, and i have 2x 4" cold air feeds from the air box to the TB or will be new air box.
The chokes are 8x 55mm, what size hole should i be looking at to make sure there are no restrictions? will make no more than around 550rwhp, there must be a calculation to work out airflow=horsepower???
At present it breathes through a NW 90mm TB as below.
It now has a FAST but its the same principle.


Last edited by lstvr; 05-11-2010 at 07:50 AM.
lstvr is offline  
Old 05-11-2010, 09:51 AM
  #2  
10 Second Club
iTrader: (17)
 
RAMPANT's Avatar
 
Join Date: Mar 2004
Location: Ontario, Canada
Posts: 1,729
Default

I can tell you one thing about the Harrop 55, it is a huge choke point.

I have it on my motor and we did not make anywhere near the power I expected. We did do some flow bench work and found some big restrictions in it. When mated to a TEA 245 shaped port it only flowed 270ish CFM. We ported it, port matched it and added some custom throttle shafts I designed and we picked up over 48cfm. The port matching picked up 22cfm, the porting added about another 14cfm and the throttle shafts added another 12cfm.

When I bought my intake used it came with a set of plenums that would not work for my car, but a spent a few weeks learning about fiberglass and modified them to fit my car. I use a 4" inlet like you want. Hope the pics give you some ideas.

Here is a link to a bunch of pics of the work I did this winter and the plenums.

http://cid-6fae0ec71cef8d21.skydrive...%20and%20Heads

http://cid-6fae0ec71cef8d21.skydrive...aspx/Enginebay

I should have the motor up and running again shortly to see if we made any significant gains.

Good luck!

BTW I love the TVR's, such a cool car.
RAMPANT is online now  


Thread Tools
Search this Thread
Quick Reply: Making an airbox??


Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 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:
Description:
Your question will be posted in: