New driveline choice

[4WDKC]

I was excited to find an 87 because it was fuel injected. I guess I just didn't know at the time the limitations of TBI. You have an 87? What are you running?

I just swapped to vortec heads, a 214/224 .443/.465 112 cam, still working on headers and I am learning to tune it myself.

Not what he should be lol

shhhhhhh

 

[Gray87GMC]

Now this changes things a bit... called the company and the heads are ported. They will put the engine on a dyno and send video to prove power levels if you pay for it

You must be registered for see images attach

 

[Honky Kong jr]

If this is a driver do you really want to keep feeding it 91 octane?

 

[Gray87GMC]

If this is a driver do you really want to keep feeding it 91 octane?

I was going to use 91 anyway because here you can only get ethanol free in 91. Plus even though I’m driving it to work everyday, it’s only a mile lol. I live in a small town, the hardware store is the furthest I drive

 

[crazy4offroad]

My '02 Sierra gets 91 all the time. If I dont, I get spark knock and evap control system codes thrown. Plus running 91 I get a nice 2nd gear peel when trying to get up to speed to merge with traffic. Lets the other drivers know "that motherfvcker wants over".

 

[gpmorgan]

My '02 Sierra gets 91 all the time. If I dont, I get spark knock and evap control system codes thrown. Plus running 91 I get a nice 2nd gear peel when trying to get up to speed to merge with traffic. Lets the other drivers know "that motherfvcker wants over".

If they don't want to move over, I usually smoke the tires and go sideways. That tends to work. Lol

 

[Snoots]

Perhaps you could paint semi-circular tire marks all down the sides of your truck?

 

[rpcraft]

My '02 Sierra gets 91 all the time. If I dont, I get spark knock and evap control system codes thrown. Plus running 91 I get a nice 2nd gear peel when trying to get up to speed to merge with traffic. Lets the other drivers know "that motherfvcker wants over".

Higher octane fuel is for controlling detonation. It's not a power adder. If you have a LS v8 in your 2002 Chevy and you haven't milled the heads and put high compression pistons in it and it is knocking all the time then you need to run a code reader on it or take it to a competent mechanic and figure out what isn't working right because it should run fine on 87 octane all the time. I'd be willing to bet you need to replace the knock sensors but getting evap codes is a little weird....