New Best/Still Need Advise

[stroker1]

My new best just don't seem right. I just ran a 6.83 last night on motor. No bottle yet, I'm waiting to get my 60's as good as I can first. I'm excited about my new best ET, but my 60 ft. was only 1.546 with caltracs, trick springs, and questionable Lakewood 90/10 shocks. My 60ft. times with slapper bars, stock spring and shocks was 1.55-1.56. What the heck is going on? Shouldn't my 60 ft time be about 1.49-1.51?? My MPH was 100.4 so it was a good pass but my god it want get out of the hole. It don't really feel like it's spinning much at all.



Help a guy out. Give me some ideas.



Stroker1 http://www.s10v8.com/images/smilies/icon_confused.gif

[jusbo]

whats the rear gear ratio? Are you running a th350 trans?

[stroker1]

Powerglide with 1.82 1st gear, rear gears 4.56, 28x11.5 MT ET Drag Slicks 3/4 worn out. Tires, wheels, suspension, are different. Weighs probably 100-150 lbs. less-mostly on front end and midsection. It's kinda funny how the slapper bars and 28x10-16 Hoosiers where doing 1.55-1.56 60fts and now I'm getting about the same. I don't really notice any real bad spinning but I'm not saying it don't do a little bit. I plan on running it again tonight, maybe somebody will have a video camera so I can watch it launch. My friends tell me that the front end was coming up and clearing the tires about 6" but comes back down pretty quickly. I can feel it when the suspension bottoms out from front end lift but can't really tell how long it carries the tires from the drivers seat. Also can't really tell how well the front end stays raised before it settles down. But I can tell you when I jerk up on the bumper it falls instantly like it has a set of 10 year old stock shocks on it. Thus my other post Lakewood 90/10 shocks suck.



What would be an expected 60ft. time for a 6.83 pass? All motor, no N2O or anything like that.



http://www.s10v8.com/images/smilies/icon_confused.gif

[stroker1]

Just got back from fayetteville drag strip. Freaky Friday all night test and tune. A freaky crock-a-shit. More of a gathering and hang out for idiots, drunks, weed wackers, and thugs. Made my ONLY pass of the night and dodged spectators, dogs and hallf naked fat girls for 45 minutes down the staging lanes and return lanes. Then get to my trailer and someones grandma-car is sitting behind my trailer! http://www.s10v8.com/images/smilies/icon_mad.gif What the hell are they thinking??



I went a 6.88 at 100.78 MPH and 1.589 60ft. I think maybe it's the tires. Gonna try somebody elses tires and see what I get.



Stroker1

[Scotty_S-15]

But Stroker, how can it be the tires, if you say you're not spinning them? Too tall maybe, but that's about it. Same goes for the suspension. If it's digging in, and the wheels aren't spinning, it doesn't get any better.

............ So I think you need to determine for sure if you're getting any wheelspin.

............ And if you're not spinning the tires, and you want to improve 60 ft., (and who doesn't! http://www.s10v8.com/images/smilies/icon_razz.gif) Then you've gotta look at more converter, gears/shorter tires, launch technique, or more bottom end from the motor. Regarding the motor, sometimes tweaking the carb can do a lot for the launch.

[stroker1]

On 2007-09-08 09:04, Scotty_S-15 wrote:

But Stroker, how can it be the tires, if you say you're not spinning them? Too tall maybe, but that's about it. Same goes for the suspension. If it's digging in, and the wheels aren't spinning, it doesn't get any better.

............ So I think you need to determine for sure if you're getting any wheelspin.

............ And if you're not spinning the tires, and you want to improve 60 ft., (and who doesn't! http://www.s10v8.com/images/smilies/icon_razz.gif) Then you've gotta look at more converter, gears/shorter tires, launch technique, or more bottom end from the motor. Regarding the motor, sometimes tweaking the carb can do a lot for the launch.

I'm not saying I'm not spinning them, just not spinning them to the point that it's noticeable. Like when I was running 1.80's 60ft. with the old setup. Now that was noticeable. Yeah, you're right about the converter. I really need more converter on motor. And a better built, tighter convertor for the spray when I put that on. So I quess I'll stay with my old same converter untill I get ready to spray it. No sense in changing in one direction and then changing in the other direction.



I probably need more convertor, and I'm running the big tube headers now so I probably lost some bottom end. But the front doesn't feel like it's staying up long enough. So that's why I'm leaning towards the tires and front shocks. I guess I really need some good video of the launch. How much tire spin does it take to be really noticeable?? I have no idea. So I guess I'll have to go on witness and video.



I'm foot braking to 2000 rpms, which is all the brakes will hold. In past experience a lower rpm didn't help any with this truck.



And as for the carb I don't really know how much more I can do with it. What do you suggest to help? I will take it into consideration. I'm running a 750 cfm double pumper, proform main body, proform base plate, both are 30cc pumps. Squirters are what ever came on the main body. I haven't even looked at them. These 4 passes the last two nights are the only time I've ran the new main body. Running 80s square jetted. (Might could go down a little on the front with the weather.) And 4.5 powervalves in both. And I'll also add there seems to be no stumble and seems to take the gas well.



Thanks, Stroker1

[rayL]

weather and track temps this time of year arent the best for killer 60fts. Besides, 60ft is just another number. The 330 and 660 is what i concentrate on. The starting line condition itself has alot to do with 60fts. Although your not noticably spinning, think about whats the real real honest difference in 1.54 and 1.51? Think you could feel it??

[soopertruper]

To check how much your spinning, paint a thick white line on the side of the tire to make it easier to tell when you video. You've got some killer times, I would just be happy and hit it with the juice.

[stroker1]

Thanks guys. Maybe I'm making a bigger deal out of it than it really is. Just seems like everyone else I talked to was pulling 60s that you would expect them to do. Anyway I might have been a little paranoid of the shocks and worn tires.



We'll see how it goes.



Stroker1

[coppergmc]

More converter. Contact ATI at <a href="http://www.atiperformanceproducts.com/products/tc/tmasterp.htm" target="_blank" target="_new">http://www.atiperformanceproducts.com/products/tc/tmasterp.htm</a>



I like their converters.

[grimpuppy]

If you are pulling the front tires off the ground you aren't spinning. This isn't the fast and furious http://www.s10v8.com/images/smilies/icon_wink.gif If you are pulling the wheels, it don't get any more hooked up. Foot braking to 2000 rpm will not make for the optimum 60 ft times. You need a looser converter. You will pick up quite a bit with the right converter. You just need to be more in the sweet spot of the motor off the line. A motor that will run 6.88 is not making near as much torque 2000 rpms as it would at 4000 rpm. More torque at launch = better 60 ft. A converter will really wake that thing up. Bite the bullet and have one made for your combo when you are ready to change it. It is money well spent.

[Scotty_S-15]

In the interim while waiting for the new converter, an experiment could be made. Try lauching off a high idle and stabbing it. This might let the converter flash a little higher. But of course, the engine (carb) has to be able to "take the gas" off the high idle.

[stroker1]

On 2007-09-10 18:18, Scotty_S-15 wrote:

In the interim while waiting for the new converter, an experiment could be made. Try lauching off a high idle and stabbing it. This might let the converter flash a little higher. But of course, the engine (carb) has to be able to "take the gas" off the high idle.

Good idea, I'll try it. With previous combination it didn't help but might be different now.



Still not so sure I ain't spinning when the wheels come down. I'm still gonna look into this some more too. And I dont carry the wheels 30 feet either, unfortunately. Just pop up and come back down as far as what my friends tell me anyway. Also, I ran a 6.93 first pass and they say the tires didn't carry at all, but I did feel the front suspension bottom out when it raised so it wasn't blowing the tires off or anything like that.



Regarding the converter, I'm not so sure I will change it anyway until I spray it. That would require totally different type converters. And I'm not up to spending that much just to see what it would do on motor with a different convertor. But man would it be nice to borrow a convertor with about the right range and see what it would do barefooted. I wish I could have the best of both. Run all out on motor and still have the ideal setup for spray. But it don't work that way. http://www.s10v8.com/images/smilies/icon_razz.gif



Oh well, I wish I was rich. I'd be looking a Gene Fulton engine and Neal Chance converter. Bulletproof glide and the whole nine yards. http://www.s10v8.com/images/smilies/icon_biggrin.gif



Thanks for the continued intrest! Stroker1

[bjcrazyz]

On 2007-09-07 11:30, stroker1 wrote:

My new best just don't seem right. I just ran a 6.83 last night on motor. No bottle yet, I'm waiting to get my 60's as good as I can first. I'm excited about my new best ET, but my 60 ft. was only 1.546 with caltracs, trick springs, and questionable Lakewood 90/10 shocks. My 60ft. times with slapper bars, stock spring and shocks was 1.55-1.56. What the heck is going on? Shouldn't my 60 ft time be about 1.49-1.51?? My MPH was 100.4 so it was a good pass but my god it want get out of the hole. It don't really feel like it's spinning much at all.



Help a guy out. Give me some ideas.



Stroker1 http://www.s10v8.com/images/smilies/icon_confused.gif



define 3/4 worn??? i know many people on here dont believe me when i say this, but a tire can still hook and not deliver a satisfactory sixty foot, with slicks, the side wall is what to watch, not the tread indicator! my old stock suspension car would only get 10-12 passes on tires before the sixty foot would start to drop off drastically!! after 12 hitsit would go from mid 1.20's to low 1.30's and never spin a tire and still carry the front tires 40-60 feet, most limited street cars change slicks after 4-6 hits



i am not saying your truck has killed the tires, but if you throw used tires on a car with 40-60 hits on them, then theres the possibility the sidewall could be broken down, to determoine this you need to a-video the truckleaving and watch the sidewall movement, or b-try a brand new set of tires



it doesnt look as if you have any adjustability in your suspension, this could also be some of the problem, with a leaf spring car(especially a truck) you need to get the weight back on the tires, if the front end is dropping to quickly you may be unloading the rear, do you have adjustable rear shocks? if so soften the compression and see if that helps



if you have a tight converter for n2o usage and plan to spray all the time, i wouldnt change the converter, this may also be hampering the sixties, if this is the case, then you are giving a little to get alot when the dope is on,

[stroker1]

On 2007-09-10 21:55, bjcrazyz wrote:

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On 2007-09-07 11:30, stroker1 wrote:

My new best just don't seem right. I just ran a 6.83 last night on motor. No bottle yet, I'm waiting to get my 60's as good as I can first. I'm excited about my new best ET, but my 60 ft. was only 1.546 with caltracs, trick springs, and questionable Lakewood 90/10 shocks. My 60ft. times with slapper bars, stock spring and shocks was 1.55-1.56. What the heck is going on? Shouldn't my 60 ft time be about 1.49-1.51?? My MPH was 100.4 so it was a good pass but my god it want get out of the hole. It don't really feel like it's spinning much at all.



Help a guy out. Give me some ideas.



Stroker1 http://www.s10v8.com/images/smilies/icon_confused.gif

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define 3/4 worn??? i know many people on here dont believe me when i say this, but a tire can still hook and not deliver a satisfactory sixty foot, with slicks, the side wall is what to watch, not the tread indicator! my old stock suspension car would only get 10-12 passes on tires before the sixty foot would start to drop off drastically!! after 12 hitsit would go from mid 1.20's to low 1.30's and never spin a tire and still carry the front tires 40-60 feet, most limited street cars change slicks after 4-6 hits



i am not saying your truck has killed the tires, but if you throw used tires on a car with 40-60 hits on them, then theres the possibility the sidewall could be broken down, to determoine this you need to a-video the truckleaving and watch the sidewall movement, or b-try a brand new set of tires



it doesnt look as if you have any adjustability in your suspension, this could also be some of the problem, with a leaf spring car(especially a truck) you need to get the weight back on the tires, if the front end is dropping to quickly you may be unloading the rear, do you have adjustable rear shocks? if so soften the compression and see if that helps



if you have a tight converter for n2o usage and plan to spray all the time, i wouldnt change the converter, this may also be hampering the sixties, if this is the case, then you are giving a little to get alot when the dope is on,



Thanks BJ, all of this is good discussion to keep my mind busy. Good point abou the sidewall wear. By 3/4 worn I meant that there is not much dot left. I bought the rims from zerogravity58. The slicks where already mounted so I just used them. I wasn't really expecting miracles from them anyway. Just can't afford a new set right now. Or maybe they got stale on the ride from Maryland to North Carolina http://www.s10v8.com/images/smilies/icon_razz.gif Who knows.



The shocks on the rear are Red Ryder Elcheapos (worked fine with previous setup) and up front are Lakewoods 90/10s that I'm thinking arent working properly. Trick springs in the front and caltracs in the back. The front end dropping quickly and unloading tires is what I'm suspecting BTW. Glade you brought it up.



Convertor is a TCI 8" for a big block and I'm running a 383 sbc. Totally wrong but it beats the hell out of the 3500 DACCO convertor I use to run. And it ain't a N2O convertor either. If it was I'm wondering if I might not even loose anything on motor if I was running a tight nos converter. Hell, the converter I run now is pretty darn conservative.



I guess there are several things that aren't just perfect with my setup, but hell 6.80's aint bad for a 383 with edelbrock performer rpm heads.



Thanks again guys. There are some folks on here that know some racing, thats a nice benefit of this site.



Stroker1

[bjcrazyz]

keep chipping at it, one day the once large mountain, will turn into a small hill http://www.s10v8.com/images/smilies/icon_biggrin.gif

[stroker1]

Yep, she's spinning. Video and witness says it's slipping pretty bad. And it's stopped picking up the tires. So it's either the slicks are finally gone or track prep. And my friends where hooking fine so it must be all from the tires. I can tell it's not carrying the tires like it was on the 6.83 pass. Last night I went a 6.92 with 1.60 60ft. and 6.95 with 1.615 60ft.



Also tried the lower RPM on the stall on one pass. All it did was make my reaction time (trucks reaction time) get worse.



I still have the ZQ8 wheels with the Hoosier 28x10-16 slicks and the have about 1/2 the dot left so I'm gonna mount them and try it.



Later, Stroker1

[gs97chevys10]

hey stroker just a question for my nowledge and maybe someone elses but youre carb you said 30cc pump how come youre not using a 50cc? asking cause i just bought a 50cc to make mine better but needed to ask off the subject i realize ..Gary

[stroker1]

On 2007-09-14 12:31, gs97chevys10 wrote:

hey stroker just a question for my nowledge and maybe someone elses but youre carb you said 30cc pump how come youre not using a 50cc? asking cause i just bought a 50cc to make mine better but needed to ask off the subject i realize ..Gary

Well, sometimes bigger ain't better. Not saying it wouldn't be for mine. Not saying it wouldn't be for yours either. You kinda have to try it.



LONG STORY! First reason I have 30cc pumps on both sides is because I'm using the remains of a homemade carb with some new goodies. I started with a bunch of old handmedown junk. Mismatched and worn out. Then I borrowed a 770 street avenger and ran it for awhile. Did well. I ordered a new proform base plate for the old double pumper. Then a friend got a new Proform main body and gave me his original main body. I had some mismatched metering plates that holley didn't even find a reference to. So I ordered some metering plates to match the main body. Then I did a rebuild with a holley trick kit and installed it. Went from 7.35 to 7.17 with swap. Now I have a Proform main body on it as well.



So in the long run all that is remaing from the old stuff is the fuel bowls and pumps. And both pumps are 30cc and it's working so far.



Couldn't afford to buy a new Holley at the time so I just peiced together a carb.



Stroker1

[gs97chevys10]

WOW! WELL THEN..LOL if it works dont f--- w/it lol I asked and got a ton of info, was asking incase you had some new trick i didnt know about??? but cool and thanks for info..Gary