Just a little bolt-on car.
Just a little bolt-on car. It's been a few years since my rare Stripper BBM '99 Z28 had been on the rollers. I knew that it was probably running a little lean, but because this car never goes to the track and rarely sees WOT, I had put off doing any additional PCM tuning. Well, last week I finally got around to installing the LS6 Intake and 28.8 injectors that had sat on a shelf in my shop for over a year, and I knew that the PCM tune would finally have to be addressed. 
The car is pretty much "full bolt-ons" now, and I have never even removed a valve cover. I'll probably forget a mod or two... but here's a list of the power mods to the best of my recollection: FTRA, MTI lid, ASP crank pulley, ported/polished/expoxied TB, 160 T-stat, smooth bellows, TB coolant bypass, MSD wires, TR55 plugs, Pacesetter coated LT's and ORY-pipe, cat-back from a '02 Camaro SS with muffler removed and replaced with a custom "D" pipe, Royal Purple 5w-30
, and now the LS6 intake manifold and 28.8 injectors. I think I might have put on stainless MAF ends a few years ago... but am too lazy to go out to the shop right now and check.
After a lot of tweaking over 9 pulls, the final result was a very safe tune that delivered 342 RWHP and 353 ft-lb of RWTQ through the T-56 and stock DS and rearend. Not a record breaker by any means, but it makes for a fun little street car to row through the gears.
Many thanks to Turtle for lending his PCM tuning expertise and thanks to Jeff at Maxwell Dodge for taking great care of us this morning.
The car is pretty much "full bolt-ons" now, and I have never even removed a valve cover. I'll probably forget a mod or two... but here's a list of the power mods to the best of my recollection: FTRA, MTI lid, ASP crank pulley, ported/polished/expoxied TB, 160 T-stat, smooth bellows, TB coolant bypass, MSD wires, TR55 plugs, Pacesetter coated LT's and ORY-pipe, cat-back from a '02 Camaro SS with muffler removed and replaced with a custom "D" pipe, Royal Purple 5w-30
, and now the LS6 intake manifold and 28.8 injectors. I think I might have put on stainless MAF ends a few years ago... but am too lazy to go out to the shop right now and check. After a lot of tweaking over 9 pulls, the final result was a very safe tune that delivered 342 RWHP and 353 ft-lb of RWTQ through the T-56 and stock DS and rearend. Not a record breaker by any means, but it makes for a fun little street car to row through the gears.
Many thanks to Turtle for lending his PCM tuning expertise and thanks to Jeff at Maxwell Dodge for taking great care of us this morning.
Thanks guys!
Back in the day when I first did hand ported heads and mild cam on my '94... it put down less power than this bolt-on LS1 I think my first head/cam combo on the stock, original short block resulted in 336 RWHP. Doh! This was like 1996, so my car was actually somewhat respected on the street. My, how times have changed.
Larry, I am hoping to get the Blue Beast strapped to this same dyno next month and then take it to SAR for some shake down passes... if all goes well I will see you in K.C.
Back in the day when I first did hand ported heads and mild cam on my '94... it put down less power than this bolt-on LS1
I think my first head/cam combo on the stock, original short block resulted in 336 RWHP. Doh! This was like 1996, so my car was actually somewhat respected on the street. My, how times have changed.Larry, I am hoping to get the Blue Beast strapped to this same dyno next month and then take it to SAR for some shake down passes... if all goes well I will see you in K.C.
TECH Enthusiast
iTrader: (1)
Joined: Dec 2005
Posts: 549
Likes: 0
From: Denver International Airport, Colorado USA
Nice..
Just out of curiosity..
What Air Fuel and Timing did you end up with?
Sometimes forget how nice these cars are with 'just bolt-ons'.
Congrats..
..WeathermanShawn..
Just out of curiosity..
What Air Fuel and Timing did you end up with?
Sometimes forget how nice these cars are with 'just bolt-ons'.
Congrats..
..WeathermanShawn..
On the final version of the tune, A/F was 12.6 to 12.9 from 3200-6200 RPM (where we nailed the throttle in 4th and hit "record" on the dyno). Injector duty cycle on the 28.8 units was only 88%. Base timing was 22* and I think it hit a max of 30* but of course it varies through the pull. I can't pull the tune up right now and look at it. It's on Turtle's laptop, but that is the best I can recall off the top of my head.
Through the entire tuning session, KR only occured a couple times and it was very modest, but we tuned it completely out. Bottom line, it's a safe tune for this motor.
Yeah, "back in the day" I couldn't imagine getting these numbers out of a completely stock internal factory small block... then came the allmighty LS1
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Nice car.... when I had a lid, cat-back , P&P TB, ported, descreened MAF, my car put down 338/351 on a DJ, a dynamics it put down 336/348, both on typicall florida summer days. with numbers like this, the car is sure fun to drive.
Very nice, love the color! Just out of curiosity, do you have a baseline before the tune? I know it was probably off by a good bit after the injector swap, just curious as to how much you picked up with the tune.
nice!...cool car also
I have a Ported TB, factory SLP intake, Hooker long tubes, off road Y pipe, LM1 exhaust into my factory SLP center mount exhaust tips and the RAM powergrip HD stage 2 clutch and I put down 351rwhp, 355rwtq SAE corrected....No tune.
I have a Ported TB, factory SLP intake, Hooker long tubes, off road Y pipe, LM1 exhaust into my factory SLP center mount exhaust tips and the RAM powergrip HD stage 2 clutch and I put down 351rwhp, 355rwtq SAE corrected....No tune.
Thanks!
No times slips at all. It has a stock clutch, PP and flywheel with a stock DS and rear behind it. I had my take off clutch disc and PP with only 10K miles from my '01 SS, so last summer I had the flywheel turning and then installed those low mile parts from the '01. It's holding fine with street driving, but I think it would start to fail pretty quickly if subjected to track abuse. My '94 and '02 are set up for the track, so they are the only ones that go.
No times slips at all. It has a stock clutch, PP and flywheel with a stock DS and rear behind it. I had my take off clutch disc and PP with only 10K miles from my '01 SS, so last summer I had the flywheel turning and then installed those low mile parts from the '01. It's holding fine with street driving, but I think it would start to fail pretty quickly if subjected to track abuse. My '94 and '02 are set up for the track, so they are the only ones that go.
Our first pull of the day resulted in horrible numbers. The tune was so far off that the car actually put down less power than it had in it's last dyno session a few years and a number of mods ago. To say the A/F was lean is an understatement.
The car was dynoed in ?2004? or 2005?? I'd have to check the printouts for the date. It had put down 323/340 back then. Since then I ported and polished the TB, and added longtubes, ORY, and just now the LS6 Intake to get the 342/353 it just put down.
I'm happy with it. It's not a max effort car by any means. Just a nice little bolt-on street car.
nice!...cool car also
I have a Ported TB, factory SLP intake, Hooker long tubes, off road Y pipe, LM1 exhaust into my factory SLP center mount exhaust tips and the RAM powergrip HD stage 2 clutch and I put down 351rwhp, 355rwtq SAE corrected....No tune.
I have a Ported TB, factory SLP intake, Hooker long tubes, off road Y pipe, LM1 exhaust into my factory SLP center mount exhaust tips and the RAM powergrip HD stage 2 clutch and I put down 351rwhp, 355rwtq SAE corrected....No tune.
Thanks Kidcamaro98. Those are great numbers for your mods. Stout car you have there.
Man thats a nice looking car. I hope my 98 stripper car puts down that good of a number. I got just about the same bolt-ons as you execpt for a LS6 intake and some of the small stuff like smooth bellows and pulley. I plan on getting a LS6 intake this week.
Thanks and good luck with yours, key4.
Thanks Jeff!
Thanks V10GTS!
Funny, but back in spring of 2003 when I was in the process of haggling/inspecting the car (which dragged out about 6 weeks), only one other interested buyer had come to really look at it. It seemed that no one wanted a stripper car with no options and few people (if any) realized how rare the paint code is.
I knew that both factors made the car doubly rare, but I played cool with the seller and didn't let him know that I actually dug the fact it was a stripper. He (50 year old business owner) was not an F-body enthusiast and didn't realize that he had such a rare color either. He just knew that he didn't see any others out of the roads, that was about it.
Thanks Jeff!
Thanks V10GTS!
Funny, but back in spring of 2003 when I was in the process of haggling/inspecting the car (which dragged out about 6 weeks), only one other interested buyer had come to really look at it. It seemed that no one wanted a stripper car with no options and few people (if any) realized how rare the paint code is.
I knew that both factors made the car doubly rare, but I played cool with the seller and didn't let him know that I actually dug the fact it was a stripper. He (50 year old business owner) was not an F-body enthusiast and didn't realize that he had such a rare color either. He just knew that he didn't see any others out of the roads, that was about it.