Bump up engine timing?
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Melting Slicks
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From: Sarcasm. Just one of the many services I offer.
Bump up engine timing?
Someone suggested bumping up the engine timing to enhance performance-how much of a performance increase could this bring, and how would you do it on a 86? will it hurt the engine in anyway?
Instructor
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From: dallas georgia
Re: Bump up engine timing? (ir0nmaiden420)
stock is 6. bump it up between 8 and 10. see which one you feel is best. i run mine between 12 and 14 but i have a miniram and it seems to like it better.
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From: The Top of Utah
Re: Bump up engine timing? (ir0nmaiden420)
Just keep advancing until your 1/4 mile, mph's start to drop off. I'd start at 10. If it's faster than the stock 6, try 12. If not, back off to 8. I run mine at 14*, on 85 octane gasoline.
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Instructor
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From: Southfield Michigan
Re: Bump up engine timing? (CFI-EFI)
I have also thought about doing this. I did this to a older car, just bumped it till I got spark knock or it wouldn't start. I ran premium tho. It helped a LOT.
One thing that helped give it timing was changing the advance curve in the HEI. Is this something that would help the Vette as well as bumping up the timing? Spring and weight kit costs like $5 at a parts store.
One thing that helped give it timing was changing the advance curve in the HEI. Is this something that would help the Vette as well as bumping up the timing? Spring and weight kit costs like $5 at a parts store.
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From: Athens AL
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Re: Bump up engine timing? (ir0nmaiden420)
the actual performance gain, in terms of what you can feel, is not that much....ie, its not really something youll notice
it'll show up as another mph in a 1/4mi run and a little faster ET, thats about it
I keep mine at 8*
it'll show up as another mph in a 1/4mi run and a little faster ET, thats about it
I keep mine at 8*
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From: The Top of Utah
Re: Bump up engine timing? (BookSmart)
One thing that helped give it timing was changing the advance curve in the HEI. Is this something that would help the Vette as well as bumping up the timing? Spring and weight kit costs like $5 at a parts store.
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From: OBAMA IS HITLER
Re: Bump up engine timing? (CFI-EFI)
One thing that helped give it timing was changing the advance curve in the HEI. Is this something that would help the Vette as well as bumping up the timing? Spring and weight kit costs like $5 at a parts store.You need a new book, BookSmart. Write, when you find the centrifugal weights and springs in your electronic, C4, HEI, distributor.
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From: SE NY
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Re: Bump up engine timing? (ir0nmaiden420)
You have to give your engine the timing it "wants" for maximum performance. Several guys here have realy gotten a boost from bumping base timing.
So long as your knock sensor is in tact your engine will be safe.
So long as your knock sensor is in tact your engine will be safe.
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Thread Starter
Melting Slicks
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From: Sarcasm. Just one of the many services I offer.
Re: Bump up engine timing? (ENGINE TROOP)
on that note 65Z01, would it be noticable if your timing was retarded if your knock sensor was sensing knock? just wondering.
:D
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From: The Top of Utah
Re: Bump up engine timing? (BookSmart)
I coulda swore I put weights in my 77 impalas HEI. I imagined they were the same. I am not confused and feel really silly. :confused:
Too much advance will cause knock. If the ECM gets knock counts it will pull timing. That will slow you down. Advance it to the point of greatest improvement in 1/4 mile mph's.
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Burning Brakes
Joined: Apr 2000
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From: Chandler AZ
Re: Bump up engine timing? (CFI-EFI)
Please also make sure your balancer hasn't walked. Sometimes the outer ring creeps a little bit making shecking with a light nothing but a good baseline. I put in the gas I am going to run. Loosen the hold down enough to tweak the timing. and take it out, let it worm up and go from there. I agree with the 1/4 mile time also. Or if you have a G-TECH the 60' times is a great tool.
Drifting
Joined: Feb 2004
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From: Santa Maria CA
Re: Bump up engine timing? (VAHROOM)
10 seems to be a good number for stock tpi's.when i put mine at 12 didnt' do me any better.G-TECH showed 2 tenths difference when i had mine at TDC and then i advanced it to stock imidiately when i noticed my timing was retarded that far. this is when i first bought my car,thats why it was like that! i'd shoot for 10 and try it.
Team Owner
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Re: Bump up engine timing? (SHINOBI-X)
Can you feel, SOTP, timing being pulled at WOT? How much is it pulled, and for how long?
I want to know what to look out for...
I've also heard that simply hooking up an analog voltmeter to the knock sensor is a poor-man's tuning tool. Wouuld this be useful, or does a knock module further down the line actually differentiate the knock signals that are impossiblle for us to see on the VOM?
I want to know what to look out for...
I've also heard that simply hooking up an analog voltmeter to the knock sensor is a poor-man's tuning tool. Wouuld this be useful, or does a knock module further down the line actually differentiate the knock signals that are impossiblle for us to see on the VOM?
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Re: Bump up engine timing? (SHINOBI-X)
Shinobi, when I use my Gtech for measuring gains, I use the HP setting.. and and always know my actual car weight +- 15 lbs, and adjust it for how much fuel I have.
I think the 1/4 mi MPH reading isn't as useful, cuz it varies more on your shift points and hole-shot. HP runs are more repeatable.
I think the 1/4 mi MPH reading isn't as useful, cuz it varies more on your shift points and hole-shot. HP runs are more repeatable.
Team Owner
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Re: Bump up engine timing? (olman)
Broken forged pistons and bent rods come from detonation. Ask how I know :cry
