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Total 5 documents matching your query.

1. [Roadsters] Head Porting (score: 1)
Author: "Daryl Smith" <drlsmith@dccnet.com>
Date: Wed, 9 Jul 2008 20:50:25 -0700
The most interesting point (to me) that they make is this: "....before the upgrades, our high compression ratio required premium unleaded fuel that still left us with pinging problems. After the upgr
/html/datsun-roadsters/2008-07/msg00080.html (7,591 bytes)

2. Re: [Roadsters] Head Porting (score: 1)
Author: "Paul" <9laser3@bright.net>
Date: Thu, 10 Jul 2008 06:50:38 -0400
And something that really bothers me, after spending nearly $2,000 on a cam, lifters, cam gears, porting gaskets etc. they gained only 14 hp at the wheels! Up from 64 to 78........ My hopes of gettin
/html/datsun-roadsters/2008-07/msg00081.html (7,438 bytes)

3. Re: [Roadsters] Head Porting (score: 1)
Author: Keith0alan@aol.com
Date: Thu, 10 Jul 2008 10:59:40 EDT
Now to be fair, part of the reason, I think, for having less detonation is that the longer duration cam will also reduce the effective compression ratio. And something that really bothers me, after s
/html/datsun-roadsters/2008-07/msg00082.html (8,153 bytes)

4. Re: [Roadsters] Head Porting (score: 1)
Author: "Paul" <9laser3@bright.net>
Date: Thu, 10 Jul 2008 11:33:59 -0400
Not sure what motor he started with, but it might be tough to keep a 'stroked' motor together at 8000 rpms. Think piston speed. Paul Ohio -- A longer duration cam will lower the effective compression
/html/datsun-roadsters/2008-07/msg00083.html (8,187 bytes)

5. Re: [Roadsters] Head Porting (score: 1)
Author: "Walter Peterson" <Walter.Peterson@cox.net>
Date: Thu, 10 Jul 2008 08:34:10 -0700
I second Keith's comments and add that with a big cam you need to get the compression back up by either closing the head chambers (welding & grinding to get better Squish which also reduces or elimin
/html/datsun-roadsters/2008-07/msg00084.html (9,727 bytes)


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