[General | Members | C900 | 9000 | NG900 & OG93 | 92X | 93 | 95 | NG95 | 97X | 99 | Sonett | Vintage Models | Performance | Detail | Clubs & SOC | Other Cars | Books Movies & Music | Chat | FAQs | Gifts | Photos | Classifieds | Polls | Raffle | Sponsors]

Sonett Bulletin Board
1964-1974
Search:

[Main Sonett Bulletin Board | Post Followup | FAQ ] [ Prev by Date ] Member Login / Signup [Most Recently Edited Saabnet.com Photo Galleries]
Stretching the redline
Posted by Jim Williams (more from Jim Williams) on Fri, 11 Aug 2000 12:57:10
Based on previous experience I never figured there was any point in revving a V4 too high -- power would tail off before the engine ran out of revs.

But now that my 1974 Sonett III has acquired a 2-barrel carb, an MSS exhaust and a Pertronix Ignitor, I feel I'm being short-changed a bit by the 5500-rpm redline. The engine is still pulling hard at that point and feels as if it has enough breath to go at least a few hundred RPM higher.

Anyone have experience with SIMPLE mods to take the rev limit higher safely? By "simple" I mean I don't want to have to take the heads off or invest big money in, e.g., comprehensively lightening the valvetrain assembly via lighter valves, pushrods, lifters etc.

So, the approach that suggests itself is to fit stiffer valve springs... but I don't know how hard that is to do or whether it provides any worthwhile benefits.

Anyone have any experience that might be a guide?

Posts in this Thread:
Members can receive an alert when someone posts in this thread.
Post a Followup

Name:
E-Mail: (Confidential & Secure - Not revealed to other users!)
Send me email when someone posts in this thread: (available to Members)

Subject:

Posting rules are simple - No for sale/wanted ads or live auctions may be here - use the classifieds.
You may not cross-post your message to multiple BBs.
Personal attacks, insults, or flaming are not allowed.
Posting any of this will result in an immediate loss of posting privileges on this site.
Site Members do not see any warning (red) text.

Message:

Optional Link URL: (e.g. http://www.saabnet.com/)
To promote your own Saab site here, you must have a link back to The Saab Network.
Link Title:
Optional Image URL: (e.g. http://www.saabnet.com/img.jpg)


The content on this site may not be republished without permission. Copyright © 1988-2012 - The Saab Network - saabnet.com.
This is a moderated bulletin board - Posting is a privilege, not a right. Unsolicited commercial postings are not allowed (no Spam). Please, no For Sale or Wanted postings, SERIOUSLY. Classifieds are to be listed in The Saab Network Classifieds pages. This is a problem solving forum for over 250,000 Saab owners, so expect to see problems discussed here even though our cars are generally very reliable. This is not an anything goes type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the Saabnet.com Mission and Purpose Page. Please remember that you are not anonymous. Site Donations
Your address is: 107.21.156.140 - Using CCBot/2.0 - Logged.
Site Members do not see red text instructions, green links, and bottom of the page banners.
Click here to see all the Site Membership Benefits!