jamesbern

Finally got to run my stroker last night, did alright I think. I had my street tires on and haven't put headers on yet so this is a rough one. Car weighs 3400 lbs. with me in it, here are the times

60'- 2.424
1/8-9.294
330-6.174
MPH- 78.87
1000- 11.980
1/4- 14.261
MPH- 98.17

As you can see traction is the biggest issue, how much will I gain with the slicks? What kind of power am I making? Comment? Questions? I left out the reaction times because I was asleep at the wheel. Thanks!

84zeddd

You are making about 275hp now but I`m sure the headers and
exhaust will help alot.You should be running mid 13`s when you
are finished.

jamesbern

Well, after looking at all of the time slips I don't understand why everybody including me only gains about 20-27 m.p.h in the second part of the quarter mile including 9 second cars that I raced. I know the engine wasn't past the powerband at the end of the track and I also know that I was running faster than 98 so is it a track mistake or what? As bad as the traction was I can't imagine anything less than a mid 13 with just the slicks. Definatley need to get the headers on and it wouldn't hurt to put my better heads on there. How do you figure track times adjusted for sea level? Any more comments? Anyone?

NJ SPEEDER

98mph with that et sounds about right with the 60ft you had. two things to remeber about trap speed, 1. it is an average over the last 60ft, not the speed you cross the line at, since your car keeps accerating over that last 60ft you exit speed is faster than your trap speed. 2. the stock speedo's in our cars tend to be a little optimistic at higher speeds.
along with the headers that were mentioned you may wanna work on your 60ft, that mph is capable of being into the 13's if you can get it off the line a little better.
good luck.

later
tim

Chronos_Titan

If you put slicks on the car and assuming that you have a good front and rear suspension a 1.7 60' time is highly possible. That could cut off 1/2 to 3/4 of a second off of the total time.

84zeddd

Long stoke motors like yours make great torque for good e.t.`s.
Short stroke motors make good h.p. for better m.p.h..But it only
matters who gets there first not how fast you were going.

jamesbern

Thank you all, this is becoming very informitive. What kind of torque would you guess at? I was also thinking 1.6 to 1.8 60 ft. times would be possible with slicks. So is my mid 13 estimate too optimistic with just slicks?

AlkyIROC

Some slicks might get you into the mid to high 1.8"s. You don't have enough torque with that heavy car to get close to 1.7 60 foot times.

With that mph you should be running very high 13's.

ThirdGenZ28 92

I cut 1.77 60fts with drag radials and at 3688lbs, with slicks I cant see any reason why he wouldnt run the same or close with relative ease and be mid to high 13s all day long....

jamesbern

I don't see why not either the engine has monster torque. Don't forget this is the same car that most people told me would pull high 14's at best, obviously an overdose on crack. I'm relatively positive this car would pull of a high 13 on street tires if I could have gotten my full throttle 3-4 upshift and even a small bit of traction, so it will be in the mid 13's with slicks. I don't want to argue with anyone about the potential of this car which is low 13's high 12's with my headers and slicks on it. I will post those times along with dramatically improved 60 ft' times soon. Right now I am running a 24" tire and the slicks are 27" how much will this help? I appreciate your comments. Anybody on the sea level thing?

Basett_Racing

James, Just out curiousity, Why are you even shifting from 3rd to 4th? With 3.73 gears and a 24" tire you should only be turning the engine 5,118 (providing no transmission slippage, of course)with a 98MPH trap speed. At this low of an RPM, I can't see any advantage to shifting into 4th. Now if I read your post wrong, then disregard this post, but I understood you to be saying that with a full throttle 3-4 shift that you felt your car would be faster.

Chronos_Titan

A 24' tire? I thought the stock size was about 26" to 28". It seems to me a 24 is really small. It was a while ago when i measured though so i could be on crack too.

IROCZTWENTYGR8

iTrader: (1)

Get some drag radials.

jamesbern

I'm only shifting into 4th because I'm not going anywhere in 1st gear so by the time I get about 200 ft from the finish my car is aorund 6000 in 3rd. Once I hook up with the slicks, I should move in 1st and won't need to go to 4th at all. Stock tires are about 24"s tall, I have a set of 27" slicks that I will try this weekend. These are rough measurements on the stock tires, but they are about 2-3 inches smaller than the slicks. I was looking at some timeslips and 99 m.p.h. will support a 13.2 so we shall see if I can pull it off. Thanks to all for the comments

Basett_Racing

Ok, thats makes a lot more sense. I can tell you that with my 383 I picked up over 2 tenths and almost 3 mph going from 26" slicks to 28' slicks, so traction wasn't really much of a problem for me, I just picked up so much more from about 330' on. my 60' times and 330' changed very little, but my 1/8 mile ET and trap speed and 1/4 picked up a lot. 24" for your tires sounds small, what size are they?? I know a P235/60/R15 is around 26", and that is a common size for these cars. I still say though, I believe that with your stroker, you'd see a gain in ET and Mph going to a bigger tire, because as you said, these things have killer torque!! I was comparing timeslips with a buddy's 66 Chevy II Fri night, and he has a high winding, solid roller cammed 350, that runs 11.30's, but he has has only pulled a best of a 1.64 60 ft time, but he is running 119+ on the big end. My car has a fairly mild Hyd roller, and I know that with my heads, carb, and intake, that a more radical design cam that will turn more 6000 (which is where my current cam gives up)will put my car much deeper in the 11's, but I am going to try to get the car as fast as I can with my current set-up. I, like you, was told by many people that a 383 with a street cam, would never go 11's, but a properly set-up 383 will run well, as long as you don't try to turn them way too many RPMs, I have seen several at the tracks, with big, long duration cams trying to shift at around 7500, and the 383's I have seen doing this weren't as impressive as I thought they'd be.

jamesbern

Its dark outside so I can't look, but I think they are 245/50/16's, maybe they are taller than 24" it was a rough measurement, but the 27" slicks are quite a bit taller. This engine only likes about 5500 r.pm. and I try to stay below that except in 1st gear, 2nd creates a bog if you shirt too soon because of the huge drop in ratio. Most of my race friends think this car will hit the high 12's by the end of the year, hopefully they are right. Basically with street tires I might as well start out in 2nd gear so slicks will probably gain me 6-9 tenths. Hey Basset_Racing, can you pull the front tires off the ground? These strokers have enough torque to do it I assume. Yea my buddy has a high horse high revving low 12 second car and it is totally different than mine, mine feels a bit stronger to tell the truth. Thanks for the help!!

Basett_Racing

Yes, My car leaves with the left front tire about 6-8 inches and totes it out for about 10 feet or so. I am really surprised that my 7.5 has held up for so long. I counted up my timeslips a little while, back realized that the rearend has about 90 passes since I built it. About 65 of them were with the 350 I had in the car B4 putting in the 383. It started out running 13.10-13.20 and by the time I took it out, it had pulled a best of a 12.55 @ 106. But the last 25 or so passes have been 11 sec runs. I have a pic here of my leaving, but it is a terrible pic, I plan on getting some better shots this year. I added a pic of the sitting to compare it to, since my car actually sits pretty low in front.

jamesbern

Thats pretty sweet, you deffinately have it all tuned out. I hope mine will pull the fronts also, feels like it will. With the 2.73's on street tires it would bottom out the struts easily, with 3.73's I haven't had enough traction to tell yet. Still looking for wheels for those slicks, should have by Friday, new times by Monday.