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1600 DP head

I put 2 grooves into the squish area of a 1600 DP head (squish zone across from the plug). The grooves are aimed at the spark plug.

The motor runs sweet. I have run it and it started with the distribuiter missaligned by ~1" of travel.

I now have the motor tuned in and it runs smooth. I think it also runs cooler but the brakes on my car need repair before putting it on the road other than short run testing. I had set the idle at 500-550 rpm but the alternator output was weak and the oil pump light would flicker. I have the idle set at 750 rpm with no oil light and a stronger alternator output.

In both cases the timing likes to be set at about 7deg after top dead center
(5deg after top dead center is correct for my vac advance/retard distributer).

I plan to play with the settings some more and test for mileage vs the stock mileage (28-32 mpg).
I have video of the motor running but I have to upload it. Arthur(dot)will(at)pgnmail.com

Click the link below for more...

Update...

It feels smoother at idle. I cannot tell if the response is quicker but it is responsive. I am still trying different settings. So far it feels strong and has not smoked or backfired even when the timing was set 10-15deg ATC. It also likes to run lean as the idle picks up and the response is crisper.

The setting where I expected to set the volume control screw at, appears to be too rich (the idle goes down and the engine feels bogged down). Normal fuel ratio is set at 2.5 turns on the volume control screw (small) and then adjust out and in untill the idle falls off on each side. then just back from there towards the spot where it runs/responds the best. 1-2.5 out on the Bypass to set the idle. My volume control screw is set about 1-1.5 turns and the Bypass is set at about 1 turn. I currently have the idle set at 750 rpm with idle timing set at 7 deg before top dead center. The motor feels strong.

I have ported and polished the heads and the intake runners. Compression ratio is set at 6.9. I have to pull the plugs as I have them at the stock settings. I am running a blaster 2 coil and high energy wires so I can open the plug gap which I intend to do. When I pull the plugs I will read them for a peek at the combustion chamber.

I tried the going from 1st to 4th test but the engine, as it is tuned, did not like it.
Allthough it did keep running!

It just bogged down a lot!

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Comments

Just wanted to say hi!
Written by Claud on 2010-02-07 22:47:18

What is up everyone? My name is Jessica. I am from Slovakia. I am new to the forum and just wanted to say hi.. I hope I posted this in the right section on your forum... [url=http://somender-singh.com/?14c7e538e1f17117b93ddadeb0b]http://somender-singh.com/?14c7e538e1f17117b93ddadeb0b[/url],

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Thursday, 29 July 2010