Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

impco 425 for blow through

impco 425 for blow through

impco 425 for blow through

hi i was wondering if anyone has used the impco 425 as a blow through. i have a 4.2 landcruiser with supercharger
and each time i put the hat on it suck's the diaphragm
open and stall's engine any help would be welcomed

RE: impco 425 for blow through

I don't know anything about the impco carb, but on gasoline carbs one successful method for blow-through is to put the whole carb in a pressurized box so you still maintain the necessary pressure differentials. This would work if your diaphram is referencing atmospheric pressure.


I have included these links for the pictures.

RE: impco 425 for blow through

Hello,there is a balance plug on the carb. You need to put a line from this hole and connect it to te pressure side above de valve so de pressure is the same above and onder the valve. I hope this solves your problem. greets from The Netherlands.


RE: impco 425 for blow through

thank you vibbetje this sounds like the answer i have been looking for very helpful.thank you lcturblow

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close