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PostPosted: Thu Jan 28, 2016 3:41 am 
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4 BBL ''Hyper-Pak''

Joined: Wed Oct 30, 2013 4:01 am
Posts: 39
Location: Australia
Car Model:
just wondering how far any of you guys have gone timing wise with a stock cammed slant? i am keeping mine at what i think is pretty conservative at the moment, only winding 12deg into it with 5psi,

to keep things simple, here's a screenshot of my current situation, im currently working on my VE table before i start winding any timing into it, i will also wind the boost up a bit more,

Image

annnd my current setup is
MS2
6x LS2 coils
36-1 trigger wheel
rx7 series 5 hitachi turbo


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PostPosted: Tue Feb 02, 2016 2:41 pm 
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Turbo Slant 6
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Joined: Sat Feb 06, 2010 10:21 pm
Posts: 527
Car Model:
My turbo slant is a race-only application with no street driving at all, ever.

Because of that, I don't worry about gas mileage, engine heat or driveabiity.

That allows me to run what the engine likes for power.... which seems to be 18 degrees.

I have an old Lean Burn slant six distributor that came with NO centrifugal advance mechanism and no vacuum advance diaphragm; the plate is locked down, solid. So, it starts and runs all the way to its 5,500-rpm redline, with 18 degrees of advance.

It seems to like that.

I could not get away with that on the street.

Bill

_________________
1964 Valiant 4-door sedan, 225 turbo/904


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PostPosted: Tue Feb 02, 2016 4:34 pm 
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4 BBL ''Hyper-Pak''

Joined: Wed Oct 30, 2013 4:01 am
Posts: 39
Location: Australia
Car Model:
Yep slightly different application.

how much boost are you running and do you have any idea of your intake temps etc,
What fuel do you run?

I am up to 15 deg at around 6psi now, but I lost my fuel pump yesterday, luckily it died off throttle was 2nd hand unknown condition.

I have a new one on the way now, slightly painful as it's an in tank setup


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PostPosted: Sat Mar 12, 2016 9:15 am 
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4 BBL ''Hyper-Pak''
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Joined: Mon Nov 16, 2015 8:41 am
Posts: 43
Location: New York
Car Model:
Hey Kcuf,

Do you have any detonation problems running that much advance?

I'm trying to plan ahead to take the steps to prevent detonation in my build, because I don't have it assembled yet.

Any tips for me?

10-12 psi
Stock 225
Intercooled blow through
IAT sensor installed.

_________________
What's this screw for?

'76 D100


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PostPosted: Mon Mar 14, 2016 2:08 am 
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4 BBL ''Hyper-Pak''

Joined: Wed Oct 30, 2013 4:01 am
Posts: 39
Location: Australia
Car Model:
gtb123 wrote:
Hey Kcuf,

Do you have any detonation problems running that much advance?

I'm trying to plan ahead to take the steps to prevent detonation in my build, because I don't have it assembled yet.

Any tips for me?

10-12 psi
Stock 225
Intercooled blow through
IAT sensor installed.


pre turbo i was having the odd bit of detonation at part throttle up steep hills on a hot day, but i think i'd sorted that out with the above maps, i haven't had any detonation at all since boost, which is how i am planning to keep it all things going well.

My maps have changed a bit since then also, i will grab a screenshot of the current setup and re-post where I am at now.

I am still running no cooler, so timing is still pretty conservative, I do need to either shim my springs or replace them as i am pretty sure even at 5-6psi it is hurting power north of 3500 or so rpm.

This is my first boosted slant so i cant say i really have any awesome advice, other than keep it conservative and work your way up, what are you going to be using for ignition control? by blow through I am guessing you are going carb?


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PostPosted: Tue Mar 15, 2016 6:22 pm 
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4 BBL ''Hyper-Pak''
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Joined: Mon Nov 16, 2015 8:41 am
Posts: 43
Location: New York
Car Model:
Yeah it's carbureted.

I'm going to use HEI with a standard cap and rotor on the stock distributor. From what I understand, I have to retard thd timing to an extent in order to prevent detonation when using pump gas.

I want to avoid retarding it if I can so I don't have sluggish start ups, so I was wondering how many degrees people have played with on a stock slant with an IC.

We'll see though! Definitely going to start conservative and push it to a reasonable location.

_________________
What's this screw for?

'76 D100


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 Post subject: Timing
PostPosted: Thu Aug 18, 2016 3:10 pm 
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EFI Slant 6
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Joined: Sun Jun 10, 2012 3:54 pm
Posts: 349
Location: Terre Haute IN
Car Model:
For my build I used a regular super six dizzy, I believe w the 9R slot. I then used the spring kit that is sold by one of the memebers (check in appropriate area) dont remember the colors but I did set my timing to 23*. I also run a 5 pin hei module from an 80's toronado. The small 5th pin when grounded pulls 5* timing which in turn limits me to 18* total. That 5th pin I set up on a hobbs switch to 5# of boost.
So, 23* timing max, bosst builds to 5#, hobbs switch closes which grounds out the toronado hei module and pulls 5* and I end up w 18*. This is all at 10# total boost with a blow through, intercooled setup. Builds noted under turbo d150 i believe.

_________________
225, Offenhauser, Holley 350, A833OD, 3:55, GM HEI,99 Durango starter
BOOSTED! WH1C, BIG FMIC, 10#
Operation Noble Eagle 03-05
Operation Iraqi Freedom 05-07
Operation Enduring Freedom 12- 13


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