 |
 |
 |
|
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
|
Go | New | Find | Notify | Tools | Reply | |
| Ignition timing question | Login/Join |
| DRR Top Comp |
Make a positive stop from an old spark plug. That way you’ll know for sure. Clowns to the left of me, Jokers to the right. Here I am....... | |||
|
| DRR S/Pro |
I measure degrees at .050 down on either side, and again at .100 down, the degree in the middle is true TDC. Same as you'd do with the head off. I'm just using the valve as the go between to physically touch the piston with the dial indicator. .991 60' 4.36 @ 159 so far..... 6.86 @ 198 trying for more...... 533" single carb 235" Harrison 4-link | |||
|
| DRR S/Pro |
Basically what we did, went to 42° and made a pass, way better throttle response, way better coming off stop in super comp and mph is still going up from runs with less timing. Motor sounds happy, plugs look safe/good. First time they have come out not looking black. Clearly the thing likes more timing. I might give it 1 maybe 2 more just to see if it likes it. But so far I'm happy. This is my wife's car, and she was able make it down to 4 cars/semis and get paid in just her third super comp race ever. First 2 races we struggled with car issues. .991 60' 4.36 @ 159 so far..... 6.86 @ 198 trying for more...... 533" single carb 235" Harrison 4-link | |||
|
| DRR S/Pro |
I considered switching fuels, but it wasn't possible at the time and I'd like to be able to carry just 1 kind of fuel for both cars. So far adding timing has made a huge gain and I think we have something that works. It seemed like a lot of timing so it was hard to justify it, but it's very clear it likes it. .991 60' 4.36 @ 159 so far..... 6.86 @ 198 trying for more...... 533" single carb 235" Harrison 4-link | |||
|
DRR Pro |
Will, I would follow what the time slips says it likes. Back in the the old small bore TRW slug days I ran upto 44* without any problems until I switched from TH400 to a glide. Apparently the increased load at the gear change was an issue. (Blown head gaskets twice in a row) I hooked up a micro switch to the shifter that would retard from 44 to 41-42 at the gear change. No problems after that. Bruce Lee  Experience is what you get when you don't get what you want. | |||
|
DRR Sportsman |
The on track performance is telling you it likes it. | |||
|
DRR Sportsman |
An alky carb, and 38 degrees of timing will most likely be .2 faster to the 660, if its a thought. That combo responds VERY well to methanol Jeremiah Hall | |||
|
DRR Trophy |
Ran a similar combo but with 345 Darts, Toilet on methanol. liked lots of timing, and some fuel. never hurt any rings or otherwise. Only changed after I wore out a 10 year old set of eagle rods. 6.41@221 (so far) 4.11@178 off the shelf/built it myself | |||
|
| Powered by Social Strata | Page 1 2 |
 | Please Wait. Your request is being processed... |
|
 |
 |
 |
 |
