Agent_Orange_Shuvel

iTrader: (8)

Thanks! The car has always launched pretty straight so I didn't notice much change from the sway bar as far as that goes, but it definitely changed it's street manners. It feels way better going around a flat corner, and I only have it on the mildest setting right now.

Well once I post up my starting line track vid I think everyone will agree the car doesn't really launch right now it just rolls off the starting line lol

I haven't been able to build more than 1 PSI footbraking it to 2800!? The car just pushes through the rear brakes. I haven't messed with the tune around the launch area this year so I'm sure it can be improved but I also think my 2.5" hot side on the 5.3 is hurting me.

It actually has been more like E70 all year. I only have one station in town that carries it and they must've forgot how to make the summer blend lol.

I probably won't lean on it much harder as it still has the stock tty head bolts, but then again I might have to stretch test them before the 6.0 goes in haha

66Chevellelq4

You can always try the sloppy trans brake mod. Force 3rd while on the line to build boost and then launch in first. Its covered in his wiki page

SSZ

I was thinking the same thing. LOL.
I think im gonna try it on my 80E after i get my tune in order.

Agent, funny you mention about the 2.5" hotside hurting the 5.3. I have the same on my 5.3 and although i havent tracked my car yet, after lots of reading and reading i think i may redo mine maybe this winter. I think it would help the spool and also be able to provide more than ample power output.
Really though, i shouldnt comment cause i gotta track the car first.
Nice work. Your car looks great.

LSChevelle

My car used to do pretty much the same. It still doesn't slam out of the hole like it should but it hooks pretty good and then blows the tires off when I get full boost haha. I added a bit of timing in the areas where the car was just coming into boost. Definitely helped me.

Haha! I tried the headbolts on the second motor I put in my car this year (temporarily since I didnt have studs) and they didn't seem to cause me an issue! (just everything else haha)

What sort of timing are you running in the 2400-2800rpm range at 90-120kpa?

forcd ind

iTrader: (7)

Your running prob close to the same turbo i am, S475 w a 92 turbine-i use a 2.25 crossover pipe, T4 mounting
I have a 6.0, it doesnt spool very quick, prob some of it is the alumn. hi rise intake, 90 deg adapter, TB-prob a smaller turbine would spool quicker-i was used to Prochargers, so this was my first turbo-I was running a turbo 400, so no overdrive, so i ran a tighter conv. and 3.25 rear gears since its a street car-i am going to install a 2.75 gear set in the 400.
I would imagine a 5.3 would be a little harder to spool-i had been ref. the wastegate at the turbo outlet, switched to behind the TB, i picked up aprx. 2 PSI, so i figured maybe some rest. thru the intercooler, plumbing, TB.
I am going to play with a man. controller., so other stuff
Is the turbo smart one you have elect., or man.-hell, i wish mine would do a burnout like yours, lol

Agent_Orange_Shuvel

iTrader: (8)

Yeah I've seen him do it in his videos and read the wiki. I'm just not sure how I feel about it slamming back into first right before it takes off, was hoping he would have a durability update lol. Might have to try it though and see what happens.


Thanks! I'm not sure how bad that is really hurting me but have heard from more than a few people 2.5" crossover is too big for a 5.3 and I would agree on hitting the track before redoing everything so you can establish a baseline.


In that RPM range 90kpa is about 25* but it falls off pretty quick, it is down to 15* by 120kpa. That part of the tune is pretty close to a stock camaro cause I wasn't sure how much timing I could safely add.


I bought the 92mm turbine with plans on putting the 6.0 in so I wasn't overly concerned with how it spooled on the 5.3, but after hearing what you just said now I am lol. I will probably need to do a gear swap after the 6.0 also, so we'll see what happens when I get around to that.

The boost controller is a manual type with a toggle switch to activate the second setting.

Thanks! depending on which burnout you are talking about I might've been using the line lock which definitely makes it easier to light em up.

LSChevelle

25 degrees just before boost and 15 after isn't too conservative in my opinion. I run about the same. Maybe ramp it down a little slower? 120kpa could be 21 degrees.. 130 is 19.. then 150+ is 15.

That is on pump mind you, should be able to run more timing on E85 from what I have read.

Agent_Orange_Shuvel

iTrader: (8)

Yeah I will give that a try. I have heard the same, just tweaking it a little bit at a time so I don't hurt it. lol



Here is the first video I got uploaded, an in-car run on 9.5 PSI that was good for 95.9mph

jtotheizzo

I didn't want to put a trans brake in so I added a 2 step. I love it, I can hit about 5 psi pretty quick on it (with crappy brakes) and it surprised me how hard the car leaves when I let off.

I went from 2.1 60's to 1.89 by putting in a looser converter but
I went from 1.89 60's to consistent 1.62's with The two step. Totally worth the $200 in my book plus it sounds cool :-)

Agent_Orange_Shuvel

iTrader: (8)

Yeah, I have been looking at 2-steps as my next option to help the launch. I'm glad to hear it has been working for you.

Agent_Orange_Shuvel

iTrader: (8)

Here is another video from the track outing

Agent_Orange_Shuvel

iTrader: (8)

Updated post #1 to reflect rear suspension upgrades.



Got a chance to take the car on a roadtrip to Boise, ended up putting 350 miles on it over the weekend. We had zero issues and lots of fun. It was mostly freeway driving which I wasn't super excited about with no AC but we made it work. Just a little noisy with the window down at 80 mph lol.


Ran most of the freeway at 77mph so I wouldn't be passed by semi's (80mph freeway speed limits and 70 mph for trucks) that was right at 2850 rpm





Managed to get 16.3 mpg round trip, was a little lower than hoped but I didn't expect great fuel mileage at that rpm either.


Also snuck a pic of Trickle's project while I was up there. I'm helping out on the tuning and I know he hasn't posted an update in a while lol





Also discovered how to add a custom splash screen to my EFILive Flashscan too, let me know what you think.

TDMKR496

iTrader: (3)

Love the build! I have an 88 Mustang that I 5.3/4L80E/S475 swapped and I love it, I also tune with EFI live. Keep up the good work!!

Agent_Orange_Shuvel

iTrader: (8)

Thanks! Yeah it has been a lot of fun and a great learning experience.

Agent_Orange_Shuvel

iTrader: (8)

Put together a little video using GoPro studio and some Hoonigan style tire shredding clips.

Deguila

Thanks for posting your build. Very nice! I drove a 70 SS396 to high school back in 1980. Nice to see them being upgraded and driven. They always were hard to launch.

Agent_Orange_Shuvel

iTrader: (8)

Thanks for checking out the thread! I've had this car since high school but didn't get it on the road till first summer after graduation.

RonSSNova

iTrader: (3)

Looking good! Poor tires!
:-)
Ron

kha4079

Nice car, clean setup but u need a beefier cam and someone to overlook your tune. 15 degrees @ 12 psi is way too conservative on e70/85. I run 22 degrees of timing @12 psi on e85 with a 5.3 and an on3 78/75 cheap turbo and a Ljms stage 2 turbo cam 3800 stall and 342 gears I run 7.0-7.1 @100 at the 8th mile and 11.0@125 spinning.

Agent_Orange_Shuvel

iTrader: (8)

Thanks Ron! Yeah those tires were done lol


kha4079, Thanks for the compliments and insight! I realize my timing was set low but was trying to work my way up gradually. Unfortunately the one gas station that carried E85 is no longer selling it so I will probably add a water/methanol kit next, or just run race gas for track outings seeing as I don't make that many....not sure yet. I wasn't going to switch cams on the 5.3 as I'm saving that for my 6.0 that will be going in this winter.

Stay tuned...it should get interesting next summer