Ideal spark plug gap?
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From: The nation's capital
Car: 91 RS
Engine: 350 TBI
Transmission: 700R4
Ideal spark plug gap?
For my brand new 350 TBI I picked up some AC Delco plugs today. I was wondering if yall have any advice as to what to gap them at.
Vitals:
Trick Flow aluminum heads 23*
Crane HI-6 ignition box
MSD coil and wires
I believe stock is .035, but maybe .045 would be better?
. . and no nitrous will be used.
Vitals:
Trick Flow aluminum heads 23*
Crane HI-6 ignition box
MSD coil and wires
I believe stock is .035, but maybe .045 would be better?
. . and no nitrous will be used.
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Joined: Oct 2003
Posts: 359
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From: Edinburgh, Scotland
Car: 1985 Chevy Camaro IROC-Z
Engine: 350ci from 79camaro
Transmission: 5 speed manual on lsd
The MSD instructions tell you to add about 0.1 to the gap so that would make 0.45.
Thats what I run and it worksa treat. Some folks can get away with running up to 0.55 but I think 0.45 is about what you want.
Si.
Thats what I run and it worksa treat. Some folks can get away with running up to 0.55 but I think 0.45 is about what you want.
Si.
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Joined: Aug 2001
Posts: 814
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From: San Jose, CA, USA
Car: 88 IROC-Z - original owner!
Engine: LB9 with K&Ns, MSD, Foil, Taylor
Transmission: WC T-5
Axle/Gears: BW 9-bolt, 3.45 posi
Uhh, not 0.1, but 0.01. You surely don't want a half-inch gap. Since he has a hot ignition box that will probably fire anything, I'd try going from the stock .035 to maybe .040. Try it there, see how the motor likes it. You might try .045 next time.
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Joined: Apr 2002
Posts: 3,552
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From: New Jersey
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
Originally posted by 8Mike9
:::::::180 HP - 263 lb/ft (open element & advanced timing) ::::::
I'd run the stock recommended gap
:::::::180 HP - 263 lb/ft (open element & advanced timing) ::::::
I'd run the stock recommended gap
Member
Joined: Oct 2003
Posts: 359
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From: Edinburgh, Scotland
Car: 1985 Chevy Camaro IROC-Z
Engine: 350ci from 79camaro
Transmission: 5 speed manual on lsd
yeah sorry did indeed mean 0.01", but that is indeed what the msd instructions said. But yeah 0.040 would be better than 0.035".
Si.
Si.
Thread Starter
Supreme Member
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Joined: Mar 2002
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From: The nation's capital
Car: 91 RS
Engine: 350 TBI
Transmission: 700R4
I went with .045 guys. I'm trying to do it once, because there's NO WAY I'm getting those suckers out after it's in the engine bay.
Those numbers are indeed with the 305.
Those numbers are indeed with the 305.
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