oldmanGS

I've been adding bolt on mods in stages for the last year or so to my 100K mile '96 Z28 A4 vert. All my passes were in the 12's @ ATCO Raceway.

My best slip reads: 1.70 60ft., 8.064 1/8 @ 84.02 MPH, 12.73 1/4 @ 105.28.
I made around 15 passes total with my slowest being in the 12.85 range. I did MPH 106 a few times.

Mods include MAC '93-'95 style mid-length headers with a single magnaflow 3" cat into a Flowmaster catback, K&N CAI, 160 T-stat, 4.10's, Yank SS3600 stall, dyno-tuned.

I run 26x10.5 ET streets on salad shooters 12 PSI cold and cheap 165R15 Kumhos 40 PSI cold on Summit 15x4 stars. I just added a line lock......really helps avoid the dreaded one wheel peel.

I removed the passenger seat, jack, spare, front sway bar and floor mats. With about 5 gal. of gas the car weighed 3360 lbs + 190 for me = 3550 race weight. DA that day (10-19) was -800 so the usual excellent ATCO air was present.

The next mods will be 1.7 rockers, electric water pump, LS1 alum driveshaft and I think I'll call it a day. I hope to run 12.5's or maybe sneak a 12.4 if possible. I would like to 60ft. in the 1.6's but I think it's just to heavy .......maybe the remaining planned bolt-ons will help?

Comments and suggestions are welcome.

robsquikz28

iTrader: (246)

Thats good for those mods But I would change those mac mids and get some LTs first before anything. Do you know what rpm your going through traps at

nik1703

That's AMAZING, even more so because you're a vert. Congrats!!!!

gregrob

iTrader: (8)

Nah. Those mids arent hurtin him at all, maybe helping.

Now if it was a cam only or h/c motor that needed the extra breathing, then LT's might help a little but I doubt he'd see much if anything right now.

Those MAC's are 1 3/4 primaries right? Perfect for a bolt on car

lemons12

iTrader: (71)

My car weighs in at 3550 race weight also. I cut consistent 1.50-1.52 sixty foots in a DA of 2000+.. I think you could get at LEAST some bottom 1.6s out of it, in that DA I would want 1.5 with your setup.

I would consider a different converter.. I have only seen a couple cars with Yank converters that really impress me 60' wise.. (Flame suit on)

Good times!

86formula

iTrader: (3)

wait until mid/late november when you see -2000 DA

nitr0racing21

iTrader: (5)

is these GTP Chris?

MonmouthCtyLS7

iTrader: (6)

Sounds about right for a Stalled/ Bolt on car on ET's...Good Runs

WhitePhoenix99

iTrader: (12)

You cut 1.50 sixty foots with a bolt on full weight lt1? I'm assuming you did it with a modified ls1 based on your sig. . You have to look at how much power the car is making, not just the DA and weight. I'm sure he could get a 60 in the 1.5s making 100 more hp with that converter, lots of people have done it and it's a pretty proven converter.

lemons12

iTrader: (71)

I have a H/C ls1.. The 60 foot as VERY little to do with your actual power.. I know people with 320Rwhp cutting just as good 60' as I am in and the same DA.. With him being in such an amazing DA there is no reason he shouldn't be in the 1.5X range with a good converter.
I only make 370Rwhp and I am expecting high 1.4X short times next track visit, mind you his will still be around a 1500DA..

RamAir95TA

iTrader: (2)

Um, what?

CamaroRacing12

iTrader: (5)

lol this is a pretty idiotic statement lol you clearly know little about the bolt on game in the LT1 world.

good job man! im surprised u got the raceweight so low with a vert. thats impressive. also ur times r very impressive! how well does the 4.10's work with the 26" tires? what r ur rpms thru the traps? im thinkin about going with 4.10's. def add those mods that u plan on adding. they will help a lot! and get a tune if u dont already have one. lighten the car up some with those mods and u will see a 1.6x 60ft most definetly. and prolly close to if not a 12.5 pass

edit: and IMO the SS3600 is an amazing converter. i have 0 regrets.

StealthFormula

iTrader: (35)

You may find better 60' times with that stall if you play with the launch rpm. When I had that stall I was cutting late 1.6's when I was launching just above idle, this was at a 3700lb. raceweight. Seems like the car runs really good! With your planned mods along with some good drag shocks/springs I could see that car going low 12's.

WhitePhoenix99

iTrader: (12)

My thoughts exactly. . Sure you CAN get a decent 60 ft without an asston of power, but the car is going to be really setup suspension wise and probably a good bit of weight reduction. We are talking about a stock suspension, bolt on lt1 here, not a heads/cam ls1. I guess he's implying a car won't launch any harder with more power. . hmmm I wonder why all those nitrous guys have great 60fts. .

oldmanGS

thanx for the replies everybody.
the car put down 249rwhp s.a.e. corrected on a mustang dyno,
i will post the sheet if anyones interested.
i only use timeslips as a true measurement of performance and i believe that i am against the edge of physical limitation on the 60'.
this car ran 13.90's@100 BONE STOCK with a K&N C.A.I.
With the addition of a YANK SS 3600 and the above mentioned E.T.STREETS,
the car ran 13.30's @ 101.
with the addition of MAC mid lengths into an off-road y pipe into an 18in" (3in"o.d.) bullit muffler and 4.10 gears the car ran 13.0's@104 with a best of 12.84@105 after a good long cool down with ice on the intake for 2hrs. LOL in OVER 2200 FT. D.A.

StealthFormula

iTrader: (35)

You have plenty left in that 60' time. It's really good don't get me wrong, just letting you know that you could do more to get it down. Drag shocks with drag springs upfront and stock springs out back do absolute wonders to these cars.

Check this out:
Page 1: http://www.bmrfabrication.com/HALimages/1.gif
Page 2: http://www.bmrfabrication.com/HALimages/2.gif
Page 3: http://www.bmrfabrication.com/HALimages/3.gif
Page 4: http://www.bmrfabrication.com/HALimages/4.gif

If you don't already have LCA's, Brackets etc. that would help.

oldmanGS

Thanks! The 4.10's work great with the 26" tires. The SS3600 with the 4.10's is a nice match on the street as well. I know others say that 3.73's are the way to go with the A4's but I'm sold on the 4.10's! I'm not 100% sure on the trap RPM's but I can say after crossing the markers the tach reads about 5900 RPM's. I was unable to data log it that day. I know the calculators say I should be around 5500-5600 RPM's and I think my stock tach could be off some. I did dyno tune it and the guy who tunes it was at the track that day and we were going to play with shift points, timing , etc. but he forgot his cable. I was wondering how many degrees total timing most guys are running?

gregrob

iTrader: (8)

My mail order tune goes as high as 42 deg total up to around 3500ish, then tapers off to about 38 from there to redline

sweetbmxrider

iTrader: (13)

nice man congrats.

check out njfboa.org!!

LS1 SPEED

iTrader: (22)

nice results for the setup

I find with my Yank the harder I foot break it the harder it 60's..even though my Yank sucks as stated in this thread going 1.40 60ft on HP.

I would try a cutout as your next mod as the Flowmaster are not known to flow well and we have seen 10+ rwhp on mild cars and 20+ on highly modded cars.

good luck on your next outing