Re: 70 TCCD porting

SchijnHeilig /
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Never worry about low-end when porting, unless you want to ride with a stock clutch.New top-end power is always taken out of the low-end power.

The portmap that Eric posted is very conservative compared to my portmap. Elliot's portmap looks a lot like mine, altho I didn't raise the intake like he did, I just widened it and shortened the piston.

My TCCD gets a good 45MPH, but that's because I gear low. I'm not a top-speed guy, I am however a high-rev cylinder guy. My kit screams (11.5k RPM) and absolutely rips with both a Proma Circuit and a Proma LowBoy (More top-end revs than the circuit).

And as a final tip: Always bring the exhaustport to 67% of the true bore, as it will give you maximum torque with minimum piston(ring)wear.

This single post is part of a larger thread. Start from the top or view this post in context.
Subject Written By Posted
  70 TCCD portingTopic by: James G James G 02/08/09 02:48AM
  Re: 70 TCCD portingRe: davey davey 02/08/09 03:00AM
  Re: 70 TCCD portingRe: finny finny 02/08/09 03:42AM
  Re: 70 TCCD portingRe: davey davey 02/08/09 03:46AM
  Re: 70 TCCD portingRe: Andréa $$$ Andréa $$$ 02/08/09 03:37PM
  Re: 70 TCCD portingRe: justin turner justin turner 02/08/09 10:19PM
  Re: 70 TCCD portingRe: Eric P Eric P 02/08/09 11:08PM
  Re: 70 TCCD portingRe: Jesse Stephenson Jesse Stephenson 02/09/09 12:11AM
  Re: 70 TCCD portingRe: James G James G 02/09/09 12:37AM
  Re: 70 TCCD portingRe: Eric P Eric P 02/09/09 08:01AM
  Re: 70 TCCD portingRe: Graham Motzing Graham Motzing 02/09/09 04:18PM
  Re: 70 TCCD portingRe: rockles rockles 02/09/09 04:25PM
  Re: 70 TCCD portingRe: Flagrant - Flagrant - 02/09/09 04:43PM
  Re: 70 TCCD portingRe: Flagrant - Flagrant - 02/09/09 04:50PM
  Re: 70 TCCD portingRe: elliot elliot 02/09/09 04:54PM
  Re: 70 TCCD portingRe: justin turner justin turner 02/09/09 06:41PM
  Re: 70 TCCD portingRe: SchijnHeilig SchijnHeilig 02/10/09 06:34AM
  Re: 70 TCCD portingRe: Jesse Stephenson Jesse Stephenson 02/10/09 02:13PM
  Re: 70 TCCD portingRe: Flagrant - Flagrant - 02/10/09 12:58PM
  Re: 70 TCCD portingRe: SchijnHeilig SchijnHeilig 02/10/09 06:44PM
  Re: 70 TCCD portingRe: elliot elliot 02/10/09 04:02PM
  Re: 70 TCCD portingRe: SchijnHeilig SchijnHeilig 02/10/09 06:41PM
  Re: 70 TCCD portingRe: Jesse Stephenson Jesse Stephenson 02/10/09 08:04PM
  Re: 70 TCCD portingRe: SchijnHeilig SchijnHeilig 02/11/09 07:17AM
  Re: 70 TCCD portingRe: erinn erinn 02/10/09 09:49PM

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