It doesn't have lag honestly but it could use more responsiveness and aggressiveness when lightly and heavily pressing the pedal, however it does heavily bump and jerk when i slow down and come to a stop, not sure if its cuz of the fuel im running (e85 currently) or just part of the cam idling etc.bstoner wrote: ↑Thu Aug 18, 2022 2:15 pm For starters it doesn't sound like your car was tuned properly. With the vehicle properly tuned you won't have throttle lag. I know with my car it is instant torque pin you to the seat or roast the tires... and I am not even high HP like some of the forced induction guys.
You don't need any add-on devices which are used to offset an air temp sensor or throttle position sensor to 'trick' the ECM (computer). All of that is handled in tuning the computer. A roar pedal just offsets the throttle position sensor so the ECM recieves an altered signal to make it think you want more throttle then what the accelerator pedal actually reads. You are just lower the resolution of the pedal and wasting money. It won't make you go any faster. It can't. That's not how it works. I also would not recommend porting your TB right away either. The TB is not a restriction and you won't gain any HP from it. You only port it to make the car more responsive, i.e. smaller movements in the TB blade result in more airflow.
As for running regular, premium, or E85 it all depends on what it was tuned for. If it was tuned for regular or is a stock tune you gain nothing but switching fuels. If it was tuned for premium you need to run 91/93 or you may get knock. E85 on a naturally aspirated motor you may get around 10 hp if you had the heads milled to bump up compression and run more timing. Not really worth it unless you are talking about possibly saving money in fuel cost vs. fuel economy differences. If you go FI then E85 can get you some big power gains!
Near as I can tell searching the forum you have an unknown mild cam, DOD delete, new mufflers, and cold air intake. Was the car tuned? I would call Twisted Steel and ask if then tuned it. Headers would make a difference and I would add that to your to do list. I would also change the rear end ratio if you want more acceleration. Depending on cam I would consider a torque converter as well.
If it was me I would do headers, rear end, and then get it tuned. Chris Henry, Shane Hinds, Pat G, Mike from New Era, DynoSteve, Ryan at GPI, Ted Jannetty, etc. all are top notch tuners. Then starting saving up for forced induction.
And ill keep away from roar pedal and stuff like that, thanks for clearing it up for me. The previous owner had it tuned but not sure from twisted steel or somewhere else, he said he never ran e85, always 93. I started to run e85 only because everyone says you always gain power from e85 especially if vehicle is flex fuel. I will definitely add a ZL1 torque converter to my list too with the headers and honestly i think i should run 93 too because it probably is tuned for that since the owner never ran 85 but once i tune it again ill have it tuned for running e85 and sometimes ethanol free 92 octane.
What do you mean by rear end by the way? is that gears like 3.45 etc and im in north houston, Spring to be specific and a shop called PowerFab does tuning for SS and others, here is an exact quote of the gentleman at the shop "We can definitely do a fully exhaust set-up on your Caprice along with dyno tuning. We have our own IN-house tuner along with 2 available dyno's. We also have a full fabrication section for working custom solutions. Thankfully there are a few options when it comes to LTH set ups and exhausts for the caprice. "
If i can find these tuners you mentioned in Houston, all good, otherwise ill have to find my own or visit PowerFab near me. I've also heard of remote tuning but not sure how to proceed with that.
Also any thoughts on LS7 swap? is it easy and direct fit like the LS3 from the SS?