Which spark plugs and wires are best for these tpi motors ?? I recently picked up 1 owner 91 firebird formula 5.7 tpi and wanting to do tune up .thanks

 

Just throw some AC Delco plugs and wires on it. Gap @ 035. It'll be fine.

 

Or you could do a little hotter coil, some 8.5's like MSD and gap at 044....

 

How many miles on it?

 

79k miles

I would like performance wires and coil. I was thinking on going with NGK R spark plugs.

 

I hate the msd wires, always breaking at the boot to the spark plug . Ill just do the msd coil. Thanks for your time

 

In order to go with a hotter coil, you really should get a distributor module that can handle it. Davis Unified Ignition sells a module and coil that allows you to run .060" gap.

I personally run the Accel non-resistor shorty plugs (headers). MSD wires.

GD

 

Sounds good ill look into it.thanks

 

The stock replacement wires for our cars are 7mm. But if you get the replacement wires for an 87-95 Chevy TBI truck, they are 8mm.

 

Ohm check the stock wires, I'd bet they'll be ok. Stock delco plugs work about the best. You really won't see any performance increase with "hotter aftermarket" parts unless you are turning some serious rpm, even then not much of an improvement.
Best advice I got from my life long mechanic step grandpa, if it ain't broke, don't "fix" it! lol.

 

Thats news to me thanks

 

Lol ive heard that before too

 

Many, if not even most, of the ignition parts available in the aftermarket are junk. This is the inevitable result of the age of these systems. Buying "performance" parts is often the only way to get quality components. Higher ignition voltages are helpful for higher cylinder pressures, and they do help keep the plugs clean. Larger gap exposes more air/fuel mix to the spark.

If you have to buy parts - buy good ones and reap the benefits.

If it's not broke, maintain it!

GD

 

Will do thanks

 

I put 8 mm Taylor spiro-pro wires on mine. Fit perfect, work great. I got the set specific to the car so everything was cut to length with both connectors installed. I'm running an MSD replacement coil slightly hotter than stock. Mounts on the original coil bracket.

For plugs, I'm running Autolite Platinums.