LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Track time finally!

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Old Aug 28, 2017 | 06:02 PM
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Default Track time finally!

I went to my local track the other day and finally got some decent passes. Now keep in mind that I was using street tires for the time being, but cam only I ran a 13.3 at 104 and a 2.1 60'. Is this decent for cam only? I mean literally cam only lol, I only have the CC503, street tires, stock stall, 1.5 stock rockers, stock unported heads, and mail order tune. I do plan on getting the drag radials, 1.6 rockers, torque converter, and heads ported by Lloyd Elliott sometime to support this cam but not right now. I should see 12's in the future with these mods correct? I've searched but numbers are all over the place.
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Old Aug 28, 2017 | 10:54 PM
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What was your 1/8 mile time?
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Old Aug 28, 2017 | 11:25 PM
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Not bad get that 60' time down and 12sfor sure
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Old Aug 29, 2017 | 04:47 AM
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Stock valve springs? What rpm did you shift at? Those shortys are choking you a bit, theres about a second left on the table if you can shift it at 6500 where it needs to be shifted. A stall certainly would be next on the mod list, along with long tubes and sticky tires.

Fun, isn't it?
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Old Aug 29, 2017 | 08:32 AM
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Originally Posted by bufmatmuslepants
Stock valve springs? What rpm did you shift at? Those shortys are choking you a bit, theres about a second left on the table if you can shift it at 6500 where it needs to be shifted. A stall certainly would be next on the mod list, along with long tubes and sticky tires.

Fun, isn't it?
1/8th mile time is 8.7 at 83

Nah, they are .570 lift Alex Springs for now. I want the dual spring lunati kit I always read about on here when I get my heads ported and 1.6 rockers. I'm shifting it a little past the stock limiter, not sure exactly though... kinda scared about the stock bottom end at that RPM. I also did plan on Long tubes as well. so it sounds like I'm on the right track for future mods then, and yes it is a blast!
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Old Aug 29, 2017 | 09:56 AM
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Where are you located? What was the DA?
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Old Aug 29, 2017 | 10:03 AM
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Originally Posted by SS RRR
Where are you located? What was the DA?
Roughly 1500' above sea level
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Old Aug 29, 2017 | 10:25 AM
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With the ultimate DA you'd probably gain 2mph if not a little more. IMO you're right where you should be.
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Old Aug 29, 2017 | 11:23 AM
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A yank SS 3600 and some drag radials will be a dramatic change. Also dial in the shift points as buf said.
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Old Aug 29, 2017 | 11:53 AM
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Op

very good times for a cam only

.1 decrease in your 60' time=.2 at the big end so if you get a tire (MT ET Street 26 x 10 on a 15" rim) and a higher stall TC you will likely pick up at least .3 on the 60' getting you into the 12's (12.7)

Head work, 1:6 RR, headers, etc, etc will all improve beyond the tires and stall......until you hit a track with 5,000' DA and you struggle to stay in low 13's :-(
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Old Aug 29, 2017 | 12:16 PM
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I think you are on par with your mod level.


My friend has the same cam, 1.6rr, Longtubes, Magnaflow cat back, vigilante3600, 3.42s, dragradials, k&n cai and m/o tune and his best pass is 12.89@104 our DA was 3000'
Same set up at sea level gets 12.5 - 11.8 again depending on DA
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Old Aug 29, 2017 | 12:17 PM
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Originally Posted by 94_LT1_TransAm
1/8th mile time is 8.7 at 83
I know we do have differences with yours being an auto and mine a manual, but 83 was around what my MPH was after the CC503/1.6 RR swap. I was on stock exhaust manifolds after the install. After installing Kooks long tubes, I picked up 0.5sec and 5 MPH in the 1/8th. So you should have plenty of power to uncork in that motor.

For reference, here are my benchmarks below....

5/22/08
Baseline stock with K&N CAI and Flowmaster catback.
Warmed up:9.1@80.322mph
Full cool down:8.9@82.436mph

10/03/08
CC503, 1.6 NSA Pro Mag Roller rockers, PAC 1518 springs, 10* retainers/locks, Trickflow guideplates, 7.2" Comp hardened pushrods, stock heads, stock exhaust manifolds, catback exhaust, K&N CAI, FMS 30# Injectors.
Warmed up:8.882@83.770mph
No full cool down run.

2/19/11
Added Kooks Long tube headers(1 3/4" x 3") and dual cat y-pipe.
Warmed up:8.437@87.88mph
Partial cool down:8.389@88.354mph
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Old Aug 29, 2017 | 12:21 PM
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Originally Posted by ******
Op

very good times for a cam only

.1 decrease in your 60' time=.2 at the big end so if you get a tire (MT ET Street 26 x 10 on a 15" rim) and a higher stall TC you will likely pick up at least .3 on the 60' getting you into the 12's (12.7)

Head work, 1:6 RR, headers, etc, etc will all improve beyond the tires and stall......until you hit a track with 5,000' DA and you struggle to stay in low 13's :-(
so in other words never move to the mountains lol got it! Ok so with a few more mods to support the cam and ill have a nice weekend track car. For now its a nice weekend street warrior! Thanks for all the input everyone, I have a list of things to do now!
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Old Aug 31, 2017 | 10:20 PM
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don't know what tires you used. I once ran a 1.62 60' on Bridgestone Potenza S-04 position street tire
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Old Sep 1, 2017 | 09:38 AM
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Def a high 12 car right now with M/T e.t street and a lower 60ft time along with a stall converter. Roller rockers would prob only gain you a tenth.

Going to be running my car in the next few months with M/T drag radials, mac mid headers, 215/224 cam, 1.6 roller rockers, ewp, and stock heads and to be honest if i get a 13.3 i would be happy. Mines a manual car though. I'm coming from a 14.2 stock.
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Old Sep 1, 2017 | 09:53 AM
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Originally Posted by 350 groundpounder
Def a high 12 car right now with M/T e.t street and a lower 60ft time along with a stall converter. Roller rockers would prob only gain you a tenth.

Going to be running my car in the next few months with M/T drag radials, mac mid headers, 215/224 cam, 1.6 roller rockers, ewp, and stock heads and to be honest if i get a 13.3 i would be happy. Mines a manual car though. I'm coming from a 14.2 stock.
At 3000' DA my old z28 ran these bolt ons:
Mad Z tune
Ls1 lid (SLP)
Pacesetter longtubes
2.5" X pipe, 10 series flowmasters
1.6 rockers
Competition clutch stage 2
4.10 gears
BFG 315 dragradials
12.98 @ 106
On a single shark nozzle set on 150 not spraying in 4th gear at all I ran 11.33 @ 119 best MPH was 121
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Old Sep 1, 2017 | 10:47 AM
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Originally Posted by pillarpod
don't know what tires you used. I once ran a 1.62 60' on Bridgestone Potenza S-04 position street tire
I was just on some Firestone Firehawks I bought years ago when I needed new tires for the car
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Old Sep 1, 2017 | 01:36 PM
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A good 60' example, our cars run the same speed at the 1/8 and the at the end. They both trap 104 mph and both have the 1/8 at 83-84 mph. My 1.74 60' puts me through the 1/8 in 8.1 vs your 8.7 and through the 1/4 in 12.82 vs your 13.3 et.
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Old Sep 4, 2017 | 12:45 PM
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Default 60' vs 1320'?

Originally Posted by ******
Op

very good times for a cam only

.1 decrease in your 60' time=.2 at the big end so if you get a tire (MT ET Street 26 x 10 on a 15" rim) and a higher stall TC you will likely pick up at least .3 on the 60' getting you into the 12's (12.7)

Head work, 1:6 RR, headers, etc, etc will all improve beyond the tires and stall......until you hit a track with 5,000' DA and you struggle to stay in low 13's :-(
I see guys posting that, .1 in 60' = .2 in 1320'. I'm not sure what would have to be wrong with a car to see that happen. I have an easy couple hundred passes on mine, .1 in 60' is .1 at the finish line. 1/8th mile, or 1/4 mile. Everybody I know sees the same. How could another car, even on street tires (I have tested mine that way when it was still a street car as well) be different?
What could be wrong with a car to see double at the finish line?
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Old Sep 4, 2017 | 01:22 PM
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Well Ed I may be guilty of passing on drag lore. Another one is "every 100 lb decrease in car weight =.1xx gain at the big end".Again more drag lore so not sure how accurate but I can certainly see any weight reduction should = more top end with all other factors =. You certainly have more 1/4 mi time than I do.

I keep a spreadsheet on the few hundred passes I have made in my car. I see the "majority" of +.1 60' gain does =.1xx at the top end. I see in some cases I picked up .2xx and more but generally it = slightly more than the 60' time gain . These are all passes same day and generally within 5-10 degrees of air temp.

Beyond the time slip info I note date, air temp, RPM launch, lane, tire pressure and general notes like headwind, etc. Headwind at Fontana can be brutal some times of the year

Obviously several factors play in any +/- gain or loss
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