When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I'm just about to stab my 6.0l into my 64 nova. I thought I had things pretty well thought out, but probably not so much. I built an LQ4 with L92 heads, flat top pistons, high lift asa cam and an LS3 intake. I'll be running dbw with an 0411 ecm (vats has been deleted). Will the engine run at all with the factory tune?
Also, should I run a maf? I was planing to go speed density, but I'm not too certain if I understand really what it is or of its the best option. Please educate me.
I'm new to this to and was going speed density until I read a few things about tuning. Appears tuning with a maf is a little easier and since I'm a newb I think I'll start out maf and switch to sd when I get some experience.
This topic is a bit like a holy war so buckle up...
My thoughts are that you should always tune the VE table anyway as the computer references this table even if you are running MAF only. It is just as easy as tuning the MAF and uses the same process. I have been running SD for years and do not have any problems. Runs great, starts easy hot or cold, different elevations and is set up to run E85 with the sensor. Some people say running the MAF makes for a smoother running engine. I haven't found that to be the case. If you have to buy a maf and fabricate tubing, I would run SD. Good luck with the project. Is this a drag or street project?
It will start. You will probably have to up the target idle to get it to idle. My 238/242 .595 112LSA cam take about 800 in neutral and 850 or so in gear.
There is a good video on Youtube about getting a big cam to idle.
Thanks guys. It's gonna be a driver. I doubt it will see drag strips, but maybe road courses. I want it to be able to go to different places, temps and elevations without incident.
I'm going to have to make an intake tube, so including a maf wouldn't be super easy. If I forgo the maf, I still run oxygen sensors, right? Its still possible to tune the ecm?
I'm going to have to make an intake tube, so including a maf wouldn't be super easy. If I forgo the maf, I still run oxygen sensors, right? Its still possible to tune the ecm?
Skip the MAF. I tuned my old 02 Silverado using both methods and noticed absolutely no difference in mileage or drivability switching between the two methods. It would start up no problem in the dead cold of winter (got below 0 actual temp many times) just like it would in the middle of summer at 100+ actual temp. AFR wouldn't change more than .2-.3. A MAF isn't a huge flow restriction and they are pretty reliable but why add one if you don't need it?
sheepdog, where are you located? depending on the kind of weather extremes you have is when the maf tune does much better. the maf adapts to all changes weather its dry humid hot or cold. speed density adapts a little but nothing like a maf tune can. im no expert in this department, but people like to say "i gained 5 rwhp without a maf". ok that day yes. say u tuned it on a 55 degree day with low humidity. that is when ur speed density tune will give u best performance. say u dyno 400 that day. now u dyno it on a 90 degree day with 90 % humidity. now u may dyno only 390 or less. a maf tune will do the same, but id bet money that if u took a a car, dynoed it in 10 different weather conditions with varying humidity and temp, you will have higher average power on a maf tune than the speed density. someone feel free to correct me. again this is just what i came up with after researching this myself. im keeping the maf.
Skip the MAF. I tuned my old 02 Silverado using both methods and noticed absolutely no difference in mileage or drivability switching between the two methods. It would start up no problem in the dead cold of winter (got below 0 actual temp many times) just like it would in the middle of summer at 100+ actual temp. AFR wouldn't change more than .2-.3. A MAF isn't a huge flow restriction and they are pretty reliable but why add one if you don't need it?
because a maf is always fine tuning. kinda like every time u start ur car, u plug in hp tuners and it adjusts ur tune for the conditions that day without u doing anything. speed density just doesn't do that.
I live in sh1tty... I mean sunny California. So I won't see low temps, but higher temps are the norm in summer. I'm more concerned with altitude changes... I think. We go to Reno petty often, which makes carbs tough.
I just got the engine in. I'm plumbing the fuel system today and want to wire it soon. Should be ready to fire in a few weeks if all goes well. The goal is to get it drivable for Hot August Nights this year. The wife had never been and it would be much more enjoyable with a car there.
extreme ends of the climate especially hot and humid is where a maf is much preferred over a speed density. altitude as well which i forgot all about lol
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
Speed density tune? 
