Javascript Disabled Detected

You currently have javascript disabled. Several functions may not work. Please re-enable javascript to access full functionality.

60 degrees static ignition timing?

Started by _Bluejinx202_ , Dec 24 2012 07:06 PM

Prev

Page 3 of 6
1
2
3
4
5

Next
»

Please log in to reply

134 replies to this topic

#51 _Bomber Watson_

Guests

Posted 03 January 2013 - 07:12 PM

You can MSD up for half the price of ICE gear....Or less....Just sayin.

Back to top

#52 _Bluejinx202_

Guests

Posted 03 January 2013 - 07:25 PM

You can MSD up for half the price of ICE gear....Or less....Just sayin.

Do MSD make a 202 setup specifically or do u have to adapt one from a different engine?

Back to top

#53 _Bomber Watson_

Guests

Posted 03 January 2013 - 07:45 PM

The dizzy just get a chev in line six one. Takes about 20 minutes to adapt to fit.

Or you can use your current dizzy, or a points dizzy to trigger the gear, the pro billet is a lot easyer to adjust though.

Then pick your control box and coil and leads and your away.

Im running a pro billet, Digital 6 and a HCV2 coil with 8.8mm leads, all MSD, cost around $600 all up from memory. If you dont need the features of the digital six then you can get way cheaper boxes.

At theh end of the day with the pro billet theres no more paying someone to regraph it, you can do it on the water if you wish during a tuning session, simple as. money saved there.

Edited by Bomber Watson, 03 January 2013 - 07:46 PM.

Back to top

#54 _Bomber Watson_

Guests

Posted 03 January 2013 - 08:16 PM

Just flicked through a summit catalogue during an add break, prices have gone up a bit, budget about $850 for the exact setup i have, or like i said do your own brousing and come up with a combo, chances are the digital six has way more features than you need.

They make a nice HEI setup for about $200 or so....

Back to top

#55 Uncle Chop Chop

Grumpy Old Man

Members
1,409 posts

Name:John
Location:Vic
Joined: 19-November 12

Posted 03 January 2013 - 08:28 PM

11X12 is 11 inch diameter and 12 inches of pitch.

Isn't the pitch the theoretical distance the bost will travel with one rotation of the prop?

Back to top

#56 _Bomber Watson_

Guests

Posted 03 January 2013 - 08:29 PM

Yes ^

Back to top

#57 _tryhard_

Guests

Posted 03 January 2013 - 08:30 PM

have you tried differant plug gaps

Back to top

#58 _STRAIGHTLINEMICK_

Guests

Posted 03 January 2013 - 08:38 PM

G'day mate ,If the Bosch dissy is in good order with the correct advance curve then it will be more than enough to make power to 6500 with the std coil ,you can buy an msd if it makes you feel better but I use a bosch and so do some 9 sec front engine dragsters. i just watched the video with the timng mark on the flywheel and the timing doesn ' t seem consistent. You could check a couple of things before you spend unnessesary cash.There are a couple of things that can make the timing advance about 40 -50 deg and then return to normal at idle. One is the circlip below the felt wad under the rotor button , the other is a sheared drive key on the star shaped wheel below the rotor button, worth a look.

Back to top

#59 _Bomber Watson_

Guests

Posted 03 January 2013 - 08:55 PM

Something else i just thought of, are you running the steel or nylon drive gear?

Back to top

#60 _Bluejinx202_

Guests

Posted 03 January 2013 - 09:41 PM

Something else i just thought of, are you running the steel or nylon drive gear?

It is a steel one. I actually brought this up with Jerry my ignition man the other day.... I take it you would prefer a plastic one?

Back to top

#61 _Bomber Watson_

Guests

Posted 03 January 2013 - 10:25 PM

Yep, i've seen the steel gears cause stray spark at higher rpm's several times.

Holden fitted a plastic gear for a reason. Holden never fittted a steel gear to a distributor.

Cheers.

Back to top

#62 _Viper_

Guests

Posted 04 January 2013 - 12:22 AM

Interesting? How the steel one cause problems? (not saying it doesn't, genuinely curious)

Back to top

#63 _Ned Loh_

Guests

Posted 04 January 2013 - 07:04 AM

Use a NEW plastic gear to try to minimise spark scatter.

Back to top

#64 _oldjohnno_

Guests

Posted 04 January 2013 - 08:09 AM

There's no need for a hotrod ignition to get to 6500. As Mick said the factory HEI will do it easily if it's in good condition, even plain old points 'n coil will do it. The steel gear seems to be ok with points (I'm guessing the drag from the points has some dampening effect) but use a plastic gear with the Bosch HEI. Steel gear also seems to be OK with the Delco to over 7000. But I'm pretty sure there's more than just a wrong dissy gear stopping it from pulling rpms.

Edited by oldjohnno, 04 January 2013 - 08:13 AM.

Back to top

#65 _Ned Loh_

Guests

Posted 04 January 2013 - 09:21 AM

There's no need for a hotrod ignition to get to 6500. As Mick said the factory HEI will do it easily if it's in good condition, even plain old points 'n coil will do it. The steel gear seems to be ok with points (I'm guessing the drag from the points has some dampening effect) but use a plastic gear with the Bosch HEI. Steel gear also seems to be OK with the Delco to over 7000. But I'm pretty sure there's more than just a wrong dissy gear stopping it from pulling rpms.

Yes exactly.

Oldjohnno, any experience (road/dragstrip/dyno/flow bench) with X2 cast headers?

Back to top

#66 _oldjohnno_

Guests

Posted 04 January 2013 - 02:22 PM

Yes exactly.

Oldjohnno, any experience (road/dragstrip/dyno/flow bench) with X2 cast headers?

No, but I'm sure they'd flow well enough to handle this sort of output even if they aren't the absolute optimum. I'm still not convinced it doesn't need an inch or two less prop pitch (as opposed to merely grinding the prop down, which would have an effect more like slipping the clutch than changing the diff ratio) but the only easy way to tell for sure would be to dyno it to see whether the problem is [A] the prop isn't allowing the engine to reach the power peak or [B] the torque and power curves are falling off prematurely. If it's [A] you'd change the prop; if it's [B] you'd fix the engine. And once you knew the output you could work out within very close limits just how fast the boat should go.

Edited by oldjohnno, 04 January 2013 - 02:24 PM.

Back to top

#67 _Bomber Watson_

Guests

Posted 04 January 2013 - 07:19 PM

Plus from what i gather an engine dyno sheet is very very usefull when it comes to getting a prop.....Select prop supplier, fax dyno sheet, ring through credit card details, wait by mailbox for perfect prop....

Much like a torque converter.

Cheers.

Back to top

#68 _Bluejinx202_

Guests

Posted 04 January 2013 - 08:54 PM

Plus from what i gather an engine dyno sheet is very very usefull when it comes to getting a prop.....Select prop supplier, fax dyno sheet, ring through credit card details, wait by mailbox for perfect prop....

Much like a torque converter.

Cheers.

Really wish it were that easy. Every boat is a little different. Weight, shaft angle, hull efficiency, engine power bands all make for a different result.

Just to show you guys that I'm listening though, I'll do some ringing around on monday and see if I can get hold of an 11X11 prop and I'll report back in a couple of weeks.

Where can I get a new plastic gear for my dissy?

Back to top

#69 N/A-PWR

CABIN ENGINE CONTROLS GALORE

Members
9,636 posts

Name:Dave I
Location:Wooroloo, 65km's East of Perth
Car:'1969' LC RAT TORANA
Joined: 08-December 12

Posted 04 January 2013 - 09:00 PM

Hi Bluejinx202,
Looks like you need a 10 pack of those Plastic Dissy Gears. Dave I

Back to top

#70 _Bomber Watson_

Guests

Posted 04 January 2013 - 09:42 PM

Really wish it were that easy. Every boat is a little different. Weight, shaft angle, hull efficiency, engine power bands all make for a different result.

Where can I get a new plastic gear for my dissy?

Oh yeah, forgot about that, same as vehicle details make model weight engine diff ratio bla bla bla bla.....

TBH i have no idea where you buy dizzy gears, i have lots of second hand ones lol.

Back to top

#71 S pack

Scrivet Counter

Members
15,694 posts

Name:Dave
Location:Luggage Point
Car:73 LJ
Joined: 25-January 10

Posted 05 January 2013 - 07:19 AM

Yep, i've seen the steel gears cause stray spark at higher rpm's several times.

Holden fitted a plastic gear for a reason. Holden never fittted a steel gear to a distributor.

Cheers.

Yep, and they advised dealers to replace them, where required, with iron gears for a reason too.
Erratic engine performance, misfiring and engine pinging.

Edited by S pack, 05 January 2013 - 07:20 AM.

Back to top

#72 _Ned Loh_

Guests

Posted 05 January 2013 - 03:44 PM

Oh yeah, forgot about that, same as vehicle details make model weight engine diff ratio bla bla bla bla.....

TBH i have no idea where you buy dizzy gears, i have lots of second hand ones lol.

Bomber - buy NEW gears. Don't ask me how I know that.

Back to top

#73 _Ned Loh_

Guests

Posted 05 January 2013 - 03:48 PM

Just to show you guys that I'm listening though, I'll do some ringing around on monday and see if I can get hold of an 11X11 prop and I'll report back in a couple of weeks.

Would make sense to see if you can borrow a prop or two and test. What sort or RPM change would you expect from a one inch change in pitch?

Back to top

#74 _Bluejinx202_

Guests

Posted 05 January 2013 - 04:02 PM

Would make sense to see if you can borrow a prop or two and test. What sort or RPM change would you expect from a one inch change in pitch?

Probably about 4-500 rpm

I know a few people with boxes of props to use but I only found one bloke that did get an 11X11 but he didn't find that it get traction and reach good speeds so he had it re pitched to 11X12 (you can only put pitch on not take it off, without ruining the blade shape if more than 1/2") ill order one and if it doesn't work out I'll do the same and pitch it up and keep for a spare.

Back to top

#75 _Ned Loh_

Guests

Posted 05 January 2013 - 04:14 PM

If your going to buy one have a good chat to a few companies first. The good ones should be able to tell you pretty much exactly the RPM change you should expect.