Thread: A few curious ?s

1. Autolite 1-3 heat ranges colder recommend to gap from .052-.060 (for the 1-3 heat ranges colder). A colder plug is meant to help transfer heat from the combustion chamber so a bigger gap would contribute to that but that gap would put more load on the primary ignition system to make that gap jump. Any other reason y they recommend this large gap?

2. I been using Pulstar Iridiums for a couple of years now and they recommend on turbo & s/c applications to gap at .025. I personally always felt that was damn to small of a gap so i left it at .036. now the heat range is 5-7 (equivalent to NGKs 1-12 heat range 12 being the coldest) so Pulstar 7 oppose to NKG 12 is 5 heat ranges hotter (NKG is 5 heat ranges coolder) so im thinking Pulstar iridiums are like 1 heat range colder compared to a OEM stock plug. These plugs are much powerful than most, about 1-2 heat ranges colder than stock, and I know the more power u make the less of a gap u would need but y so small at .025? I mean its not a s/c 1970 Buick GS(hypathectically) with 13:1 compression ratio, its a 3.8 s/c with 8.5:1. Much less power but the plug instructions dont indicate how much power, it just says s/c or turbo gap at .025. I think its to small, do any of u have any thoughts on this?

3. I've been procrastinating on changing my oil pan gasket and oil pan (previous maintenance not using a 2x4 under the pan) but every time i get under there im stuck with the fact that i have to do more than just the pan bolts. Looks like i have to drop the fwd subframe. Any suggestions on how I could do this in a much simple way?

4. Anybody change their subframe bushings? I need to do mine (all four corners) but i've been hearing that the fwd bushings are hell to get out. b4 I get stuck under there, is there any easy way to do this? Suggestions? I have a 2 car garage so thats the space I have....

5. Anybody know the advantage of the ZZP performance fuel regulator opposed to the stock OEM fuel regulator?

6. Whats the top octane we can run in our motors? i know octane cant really hurt our motor but way too much may burns some seals and it definately wont help performance. I know it depends on ya mods and compression ratio but what do u think is the border line of octane our motor needs and performs best with? I personally think 93 octane is perfect. Car manual recommends 91 premium (im in Cali so thats all we have anyway) but 93 octane is pretty good after a few power mods. I use 91 octane mixed with 2 gallons of 100 VP racing octane, works pretty well. Anyone have a suggestion on octane level across the board?

7. How many ohms of resistance are in each foot of the prj wires? I've been using the Taylor wires for some years now but I could never find the resistance ratings on these. I always assumed it was no more than 40 ohms per foot but I was never sure. They work great, but does anyone know the resistance rating?

8. Does that Gforce chip really work for our cars?

9. How well does the AeroForce gauge work? And who sells the best oil and knock retard gauge for our cars?

10. Has anyone changed the s/c BBV(bypass valve) and gained any benefit from? I know they barely go bad, but I was just thinking of what it may look like in there

Feel free to inbox me if you only want to answer certain questions, otherwise here is just fine for me.........plus it may answer somebody elses question also

Thanx, Dee....

On the subject of octane.. You only need to run as much octane as needed to prevent knock. Running more octane than needed will hurt performance and fuel mileage.

I agree with u on that one, I've had so many arguments with people about this subject. I knew 91-93 octane is just enough for our cars but i just wanted someones experienced opinion with these modded L67s. I know Corvettes run fine on 93 octane so I know we should be good (as long as we have the right supporting mods for our upgrades)

Some people throw on performance upgrades without supporting mods thinking higher octane would cure everyting, Lol thats funny...

But thanx for ya response, makes me feel better about what octane im running

8. Does that Gforce chip really work for our cars?

9. How well does the AeroForce gauge work? And who sells the best oil and knock retard gauge for our cars?

10. Has anyone changed the s/c BBV(bypass valve) and gained any benefit from? I know they barely go bad, but I was just thinking of what it may look like in there

8. Nope, those are a joke, you have to use a tuning software. HP Tuners or DHP Tuners, those are the only ones that can work.

9. Any electronic oil pressure gauge will work, mine was 50ish bucks and works great. The Aeroforce gauge reads KR and everything else you really need to monitor on a normal basis.

10. Changing it wont do anything unless it was bad.

Originally Posted by matt5112

Not if the higher octane fuel contains less ethanol.

Thats how shell fuel is setup here.

87 has 10%, 89 has 5%, 91 has 0%.

Higher octane is harder to burn, whether or not it contains ethanol.