LS1 Guys...What do you shift at/rev to?

[Guest Removed]

Ok, how about Matt needs to figure out why his car drops off power and traps like a stock M6 LT1.

 

Then we move on.

brian has those answer's..... but i guess its not my place to speak

[Squale iii]

I'm sticking with bad/incorrectly gap'd/old plugs...lol.

[MrMeanGreen]

I'm agreeing, start with the basics and move on. By Matt stating it was a woman first-owner, chances are she didn't do maintenance shit other than oil changes.

 

Rob, we know where you're coming from. I'm in the same boat.

[Squale iii]

brian has those answer's..... but i guess its not my place to speak

 

lol

[Guest Removed]

I'm sticking with bad/incorrectly gap'd/old plugs...lol.

your thinking backwards. bad plugs will make it go rich, not burning all the fuel off.....

 

a weak fuel system(ie plugged filter, weak pump , or just not enough fuel system, cause of the dumb reg in the tank crap on these you see fuel pressure drop at high rpm above 400ph, till you move the regulator) will cause a lean issue.

 

but high mileage plugs dont help either.

[RUTAN TA1647545492]

Ok, how about Matt needs to figure out why his car drops off power and traps like a stock M6 LT1.

 

Then we move on.

 

I think it may be partially due to manifolds and convertors still on the car and an auto but i agree it should trap 104-106

[Guest Removed]

lol

dayton..well that explains it

[Squale iii]

your thinking backwards. bad plugs will make it go rich, not burning all the fuel off.....

 

a weak fuel system(ie plugged filter, weak pump , or just not enough fuel system, cause of the dumb reg in the tank crap on these you see fuel pressure drop at high rpm above 400ph, till you move the regulator) will cause a lean issue.

 

but high mileage plugs dont help either.

 

I'm no mechanic, you're probably right. I know there's a certain order you usually do when doing diagnostic work like this. I just know in my car I had one bad plug and it took me 2 goddamn weeks to figure out why it didn't run so well WOT...LOL. I'm kinda a moron though, I'm sure someone more knowledgeable would have realized it sooner.

[MrMeanGreen]

I think it may be partially due to manifolds and convertors still on the car and an auto but i agree it should trap 104-106

 

Yup, I agree 100%. With headers, catless y-pipe, and even as an auto, I'd like to see 108-110mph.

[RUTAN TA1647545492]

Yup, I agree 100%. With headers, catless y-pipe, and even as an auto, I'd like to see 108-110mph.

 

I can agree with that mph with those mods

[MrMeanGreen]

Matt, did you happen to remove your floor mat when you ran at the track? Serious question.

[Guest Removed]

Matt, did you happen to remove your floor mat when you ran at the track? Serious question.

he left it in..hoping for the toyota mod...

[V8 Beast]

Throttle cable mod

[Guest Removed]

Throttle cable mod

that only happens when Hal is around.:bangbang:

[TurboRust]

floor mat was in.. stock plugs were just removed.. showing almost .080 gap.. new plugs wires pcv and fuel filter getting finished now.

[Guest Removed]

floor mat was in.. stock plugs were just removed.. showing almost .080 gap.. new plugs wires pcv and fuel filter getting finished now.

try to blow thru the fuel filter and see how plugged up it is

[gillbot]

I do the 1-2 shift at 6700, the rest at 6900. I was shifting at 7000-7100 but the trans is getting weaker and weaker so I had to lower it to keep it off the limiter at 7200

[99ta]

I do the 1-2 shift at 6700, the rest at 6900. I was shifting at 7000-7100 but the trans is getting weaker and weaker so I had to lower it to keep it off the limiter at 7200

 

 

you have a cam though. he is stock. I think your confusing him......

[gillbot]

you have a cam though. he is stock. I think your confusing him......

 

or i'm lazy and didnt read through all this.

 

 

LS1 Guys...What do you shift at/rev to?

 

I answered?

[Chadz89GTA]

or i'm lazy and didnt read through all this.

 

 

 

 

I answered?

 

Read the thread before you make posts!

[nurkvinny]

Funny. Nobody has mentioned the driver mod.

[V8 Beast]

5800 - 6000 works very well.

[Snowflake]

Funny. Nobody has mentioned the driver mod.

 

but its an auto. I thought it was push the gas and go?

[TurboRust]

Funny. Nobody has mentioned the driver mod.

I dunno.. i drove the shit outta the mach1 had some of the better times around for a street car, and I gotta say.. his car was the most unchallenging boring "sports car" i've taken down a track... matt, his dad, and myself all ran 2-3 passes each in the 13.6x range.. so no driver mod here.

[ls1plus]

My car is auto, and currently shifts at 5500rpm. Using previous knowledge and glancing around on ls1tech it seems that ls1s breathe more up top and lots of people are shifting between 6200-6500 on a basically stock or bolt on car.

 

Now I know from my dyno that peak hp is about 5500, so what would revving the car out to 6500 do for me? Wouldn't it be diminishing returns? I.E., you're hp/tq is decreasing as you increase your revs? Or is it a catch 22 because the car has to shift more times and I'm in a higher gear going through the traps that I may actually be suffering at the track?

 

I'm just trying to see what the general consensus was, and what everyone felt was a safe rpm to rev to.

 

I am assuming from your first post it is all stock valvetrain. With stock valvetrain, 6k is all the farther i would push it. When my valvetrain was stock, i bumped the limiter to 6200 and ended up breaking 3 springs and 2 pushrods if i remember correctly.