New fastest ET
 

Alot of you guys have been following my car in another thread, but since that was talking mainly about fuel issues i figured i'd better start one about how my car is doing now.

Well my last time at the track i told you guys it went a 12.67 at a 106.16. Since then all ive done is put an electric water pump on and changed to an s10 manual steering box from my power steering.

My new time is...

12.28 @ 109.45 mph. With the timing at 35*.

The slip goes like this..

Rt: .02
60 ft: 1.7061
330 ft: 5.0091
1/8 ET: 7.8021
1/8 MPH: 87.88
1000' ET: 10.2262
1000' MPH: 100.43
1/4 ET: 12.2832
1/4 MPH: 109.45

I'm pretty excited about pulling that time off, im swapping my worn out 275/60R15 radials for 275/50R15 tires. I'm hoping that will give me enough top end mph to maybe snag an 11.99 pass on a good DA day. I was also shifting at 6800 rpm. My car specs are in my signature!

Re: New fastest ET
 

wow, awesome to hear! i'm surprised you picked up that much with just gaining parasitic hp!

you will need approximately 2 more mph to get an 11.99

Re: New fastest ET
 

I was also pretty surprised? But the electric water pump was allowing me to run the car really cool, and it really seemed to like that!

I'm hoping to be able to get that 2 mph with the 26" tire! But who knows, hopefully they dont make my et go the other way.

Re: New fastest ET
 

great time. my engine specs are just about the same as yours and am glad to see that time is very realistic.

Are you using a stall?

What do you think your car weighs?

thanks

Re: New fastest ET
 

That's one reason why i thought it'd be necessary for a new thread is i wanted to show that this combo, being a popular one, can pay off.

I am using a stall its a 3500. I'm footbraking to about 2500 before i take off. Anything past that and i start to roll forward.

Also, i know my car weighed 3300 with me in it before the electric water pump and manual steering. And those were a 50 pound removal so id say raceweight with me in it's 3250.

Re: New fastest ET
 

Nice run. One more tenth lower on that sixty foot and you'll have your eleven second pass...

Re: New fastest ET
 

Now that combo is coming around but thats a great gain for those mods. I'm in the middle of deleting my electric water pump and going back to conventional... :doh:

Have you played with fueling at all?

Re: New fastest ET
 

Streetlethal - Thanks. I was thinking the same, i still have the stock 10 bolt with an eaton posi in it so im nervous to try and push the 60 too much but i still am running my stock lca's so i think i might purchase some relocation brackets since my lca's are parallel to the ground.

Orr - Yeah this electric water pump was a pain to put on, it's the main reason why i got a manual steering box, because the electric water pump didnt have the bracket for the power steering. Also, i did not mess with fueling. This q-jet that i put on has worked at a 12.97 with the other cam and it seems like it just puts the perfect amount of fuel with whatever part i throw at it,haah. I've been hesitant to mess with it because of all the fuel issues i was previously having, im just happy to have a consistent low 12 second car. I do want to touch an 11.99 though:burnout:

Re: New fastest ET
 

IMO you need 111mph to get a 11.998 typically or a stellar 60' to make it happen. But at least its going in the right direction finally.

Re: New fastest ET
 

Yeah im not too sure if the 26" will get me that extra 2 mph or not. I just got them in today so hopefully sometime next week i can get some updated times. I'm hoping the 28" was just a little too big.

Re: New fastest ET
 

yeah, I have the March pulley kit for electric water pump. Only has powersteering and alternator. Looks nice, but at 550 bucks i feel its grossly overpriced. I'm currently converting it back to regular pump since I had issues with electrics and all CSR products seem to be on back order right now and I cant get a replacement. So screw it, i'm done with electric. Great stuff for drag racing tho but i just cant trust them on the street much. I plan to drive alot more this year than I ever had before.

Re: New fastest ET
 

Yeah i purchased a proform electric water pump because it was pretty inexpensive. I did however, find out why it was so cheap. It took alot of fabricating to get that in there. I had to drop the altenator some so that the belt on it wouldnt hit the water pump, and then like i said i would have had to do some more stuff to get power steering to work so i figured manual would just be worth it to do for the price and weight savings. So just a forewarning for anyone else going that route. It did help alot apparently with the track though.

Re: New fastest ET
 

I would drop the ps pump belt if I wanted to gain 1 mph, electric pump was worth almost nothing...wonder if your pumps were tight or something.

Re: New fastest ET
 

Yeah the electric water pump was mainly for the cooling of the motor as i already have an electric fan switch which could cool it pretty well, but i figured the electric pump would do the trick. Which it did. Alot less time between time trial runs now, i just drive right on up and can cool the car with the car off now.

Also, it could have been tight or something, i know that the belts that were on there were pretty worn.

Another thing, i've been looking to get aluminum brake drums and i was wondering what are the gains in doing that? Just a minor little thing since i could pick some up at a local junkyard if it was worth it. Would they be able to allow me to be able to torque the car up a little more before take off? And i heard they are 10 pounds lighter total than the two rear iron brake drums. I also read something about rotational mass making it more, i know its not alot just a little added bonus for some rear brakes i need anyway.

Re: New fastest ET
 

The aluminum drums won't hurt, but by themselves you probably won't see much gains. They're pretty hard to find in good shape though.

Re: New fastest ET
 

Will i see any gain in footbraking rpm's at all?

Re: New fastest ET
 

I am speechless as to how close your times are to my old combo's times.

My best ET with my Vortec head, 10:1 compression 355 with XE274 was:

12.28 @ 111.85

Car was 3050 lbs empty, 3300 with me in it. I would imagine you will have more left in your combo with a bigger cam and more compression that I had. It's just pretty cool that they are the same ET down to the tenth. How much timing do you run? I picked up several MPH going from 38* total to 36*. Your car also 60's better than my old car did. Let me see if I can find a timeslip.

Re: New fastest ET
 

Wow that is very close,aha. My timing is at 35* i also bumped it down from 38* and saw a major increase! Sounds like we are very close then! If only i had the mph you had i could maybe be in the 11's!

Were anything done to your heads? Also what tire size and gear did you have?

Re: New fastest ET
 

3.73's and a 26" tall tire, I always ran it on radials with a hughes 3000 stall. The car was funny it would never 60' really exceptional, not sure why. On slicks it didn't seem to go any faster ET wise and would lose MPH on the big end. I found my post from when I ran 12.28:

https://www.thirdgen.org/forums/orga...ls-friday.html

RT: .036
60': 1.869
330: 5.133
1/8: 7.889
mph: 89.27
1000': 10.270
1/4: 12.284
mph: 111.85

Re: New fastest ET
 

Wow, yeah you were getting some good mph there. That combo should have easily gotten 11's with a lower 60 foot! I'm running 28" tall tires i just bought the exact tire size you were using, hopefully that will give me the same mph you had!

Re: New fastest ET
 

All my car's combinations over the years and my 99 LS1 car all run best 60 foots in footbraking as high an rpm as the brakes and/or tires can hold. I've tried off idle flashes, i've tried half way footbrake flashes and full footbrake stalls and the full footbrake always ran faster

Re: New fastest ET
 

Thats the same with my car. I would rev to 2500 and i could feel the tires wanting to budge and then i'd launch and get a good run. If only i could get 2-300 more rpms at the light so i could really take off.

Re: New fastest ET
 

OK here i have a picture of the new tires! mounted on the wheels now showing the difference in tread and size!

Also, i included a picture of what my lca's look like. It seems to me like they slope up towards the back wheel. I've read they are supposed to have a downward angle? I am pulling 1.68 60 ft at best in these, so i was wondering if lcarb will put too much on my rearend and snap it?

Re: New fastest ET
 

definitely need weld on relocation brackets in the middle hole, my car always moved around on me until I bought aftermarket LCAs as well, the stock rubber ones never launched straight.

Re: New fastest ET
 

Oh okay, so run the middle hole? I see alot of people say the bottom hole but im thinking like you said the middle one would probably give me a more slight slope down the backside? Would it improve my 60 foot?

Re: New fastest ET
 

yes. i run mine in the middle hole too

Re: New fastest ET
 

Ok thanks guys!

Re: New fastest ET
 

I run bottom on my car. I've done both middle and bottom and no real difference at the track but on the street, on my car, the middle one keeps LCA parallel with the ground... bottom is downward slope. It does have effect on handling feel. Handles better with middle hole, but at the track I ran bottom just to make sure it planted tires.

On my 99 ta, my bars were going UP towards the back, worse than your pic and it still did a 1.68 60 I believe. I put it on the bottom hole to make things "correct" and went 1.66 but I dont think the change alone was the cause for that. Just a better night with less weight in the car

Re: New fastest ET
 

the problem i was having with my car on the bottom hole is that it would smack the tires really hard, and was causing it to wad the tire up. with no real adjustment in the shocks, it was bouncing around, unloading the tires when it did so. in the middle hole it hits them a little less, and is much more consistent.

you'll just have to try it and see really...

Re: New fastest ET
 

Yeah, the planting hard to the ground is what i was worried about. I just dont want to break a rearend over a minimal gain in 60 foot.

Re: New fastest ET
 

great times with that combo, we have 383 with the vortex with only a few passes...no 11`s yet. where do you test at?

Re: New fastest ET
 

Im running a th350/3.73 gears and 26" tall Hoosier QTP's. Loosing the 28" tires should help. I am also running LCARB's in the bottom hole. The car with me and a 1/2 tank of gas is 3400 lbs. You can compare my mph/et/60 ft times in my sig. Yes, I should be in the 11's with my mph. Just some info for you to compare to.

Re: New fastest ET
 

Thank you! I wish i had a 383. But I go to milan dragway in Michigan to do all of my track time.

Re: New fastest ET
 

I'm shocked youre not in the 11's haha. Very nice 60 foot as well. You're running a 10 bolt still right? And your heads are what i'd love to have, but my vortecs are getting the job done for now!

I should be going to the track again tomorrow with my 26" tires so i will let you guys know what i run! I also upgraded my rear brakes to two large brake shoes and now i can brake torque to 2900 instead of around 2400 so hopefully thatll allow me to take off just a little harder!:burnout:

Re: New fastest ET
 

Yeah, it should be in the 11's. I'm thinking I need to lean the carb out a bit. It seems to do good in the 1/8, but I think it is not pulling as hard in the last 660ft.

And yes, I am running the stock 10 bolt with Richmond gears. If my race weight was like yours, I would be in the 11's no problem.

Re: New fastest ET
 

If you find yourself still needing to brake torque higher classic industries sells a heavy duty rear drum set with carbon pads HD drums and backing plates fully assembled. They make it for 70s through early 80s cars but they bolt right up. Honestly a price of 499 shocked me at first but after pricing parts piece by piece its a pretty good deal especially since you just unbolt your old backing plates and bolt on the new completely assembled ones. Anyways sounds like you are really getting your combo all dialed in. Good luck on your next passes.

Re: New fastest ET
 

So your going to NO ET eh? we were thinking of going also, maybe see you there :waveman:

Re: New fastest ET
 

Yeah, they are doing test and tune tonight so i figured i'd go today instead of tomorrow for the grudge racing. You race at milan as well? I will definitely look around to see if i see another thirdgen:). Wont be too hard there arent many at milan!

Re: New fastest ET
 

How`d it do? we went to no et, 4 3rd gens total, 2 broke including mine

Re: New fastest ET
 

Oh wow really? What broke? sorry to hear that! I went friday night! It ran a best of 12.49 at 107.45. I wasnt hooking well at all though, i think those lcarb's are going to help me alot more now. i was getting 1.80's and 1.78 60 foots compared to my 1.68 and 1.70's. I think the bigger 28" tire was helping with traction with how off my lca's are. But it was also really hot! the DA was around 3000 compared to 1600 when i made the 12.28.

Re: New fastest ET
 

Keep working at it, your at the right track to get the best 60`s possible :nod:

My car broke a roller lifter wheel, split the ring right in half. I`m running springs that are 400 seat and 1000 pounds of open pressure over the nose (.825 lift) Of course it pops at the big end at high rpm so I have yet to see all of the damage but I know we will need to look at the all the lifters closely, repair the cam lobe, hope and pray the needles didnt do too much damage as they made their way to the bottom and thru the oil system. totally new engine 10 passes old. :burnout: we trying for 8`s on motor pretty hard but nothing that would compromise the parts that quick

Re: New fastest ET
 

Yeah youre making a little more horsepower than me:). Hopefully you get it fixed and i will see you out there soon!

Also, i just ordered the lcarb's and lca's and panhard bar kit! so hopefully these will help!

Re: New fastest ET
 

Congrats! Very very nice!:thumbsup:

Re: New fastest ET
 

Thank you! I have followed your build as well! Very impressive times, if only i knew more about turbos!:burnout:

Re: New fastest ET
 

our set ups are real close.

ive finally made time to work on my car again. i swapped out the 700r4 for a 350 with a 3k stall, switched to an adjustable torque arm, founders lcarbs and lcas. i also got the 650 jetted right also switched out the street tires for 28x11.50 et streets. looking for that 11.99 pass also. my cam is a bit smaller than yours and less compression. closest track is an hour away, making time is the hardest part.

great job on working things out!!! looking foward to hearing about that 11 second pass

Re: New fastest ET
 

Thank you! And yes i was watching your build for awhile, i thought you were headed towards fuel injection? But i think youre very close to my setup, should run similar times! I just purchased the lca's and relocation brackets, hopefully my 10 bolt can withstand it!

Re: New fastest ET
 

i was intending on it but ran into some other snags, needed a new driveshaft(long tail to short tail), and subframe connectors, and now i have an overheating problem, so i got a griffin radiator and flex a lite 298 fans instead.

i will make the switch soon though.

your rear should be fine, the secret to making a small rear last is taking as much weight as possible out of the car. and your car is pretty light.

what rpms are you shifting at? and what kind of rpms are you seeing going through the traps?

Re: New fastest ET
 

Yeah its always the little things that add up. And yeah i gutted this thing pretty well its alot lighter then when i last weighed it with me at 3300 so im thinking its around 3200 raceweight.

I actually run some really high rpm's that i wasnt expecting. But the car just keeps pulling and i noticed that if i shift lower my mph at the end of the track suffers alot. The car does the 1-2 shift at 6200, and then i do the 2-3 shift at around 6800-6900(with my new 26" tire). And then at the traps im right around 6500. So im pretty far up there in the rpm's but so far so good!

Re: New fastest ET
 

6500rpm trap speed? at 109 mph? with a 3.73/26" tall tire? that's like 19% converter slippage....

Re: New fastest ET
 

Is that a decent amount of slippage? I also was only running 107 mph with the 26" tire. See i was thinking that my cars tach was off cause i think 7000 rpms is just way too high and my dad sat half track and said the car didnt sound like it was revving too high at all.