Kevin Shasteen Posted January 10, 2001 Share Posted January 10, 2001 I have not swap'd my 6 for a v8 yet; however I have been thoroughly researching how I would set my eng/trns 280Z when I'm ready for the swap & will definately go w/6spd. My question(s) to all who have done the swap: 1) When racing someone or during a hard acceleration how much tire spin is there in each gear. 2) Because of the xtra power-what are your shift points 3) For those who respond please advise what your tire size is, rear end gears & transmission you are running. 4) Also anyone responding if you have had your engine dyno'd please referance your hp/torque-rpm #'s. I appreciate anyone's response & welcome any insight. Quote Link to comment Share on other sites More sharing options...
Modern Motorsports Ltd Posted January 10, 2001 Share Posted January 10, 2001 quote: Originally posted by Kevin Shasteen: I have been thoroughly researching how I would set my eng/trns 280Z when I'm ready for the swap & will definately go w/6spd. 2) Because of the xtra power-what are your shift points I appreciate anyone's response & welcome any insight. I"ll touch on your Q2 and insight question. What are your goals for us to offer insight? Xtra power won't typically affect shiftpoints unless your just spinning and trying to find lesser power to gain traction. My shiftpoints will always be peakhprpm as long as it doesn't drop me below my peaktqrpm, if it does then I'll shift a little higher so's not to drop too far assuming my build handles the extra rpm fine. Do you have any dyno or shifting software? Can't recall any URL's as I"ve had mine now for a while but they'll quickly give you a good dyno curve approximation and a great feel for how various factors affect the curve. ------------------ Of all the things I've lost, I miss my mind the most. Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted January 10, 2001 Author Share Posted January 10, 2001 I definately want my Z to be streetable & wont be going beyond 300 to 350hp range. I like the t56 & will definately be using it when the time comes. My 78 has 3.545 rear. I know what theory shift points look like on paper & how to stay on top of the cam when shifting. Mainly I was curious what everyone running the v8 can get away with prior to actual wheel spin in each gear. I'm not looking for extreme detailed comments; I can crunch the #'s in theory all day lont, however, I wanted to go beyond theory w/actual figures from anyone here who has already gone that route. A simple/quick response from ya'll like: 1) HP = 350 2) Torque = xxx 3) Auto/Standard Trans 4) Rear Gears 5) Tire size I guess what I'm looking for, since I'm still running my tired/trued inline 6 are some real #'s to play around with. I have desktop dyno's but dont really like it; what would you suggest?? [This message has been edited by Kevin Shasteen (edited January 10, 2001).] Quote Link to comment Share on other sites More sharing options...
MYRON Posted January 10, 2001 Share Posted January 10, 2001 Kevin, My car is 450+ hp and around 420lbtq I have a th350 automatic r200diff 3:54 gear open unit 16x8 rims with 205-50ZR yokohamas I have minimal wheelspin due to the fact that my car doesnt build power until 3000 rpm and the torgue converter is a stock unit.. you can see the car in featured rides Best times so far 60ft 1.79 0-60 4.51 sec 1/4 mile @ 117 MPH Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted January 11, 2001 Author Share Posted January 11, 2001 Thanks Myron....that's exactly what I was looking for. Nice Ride-what are you trying to do-get noticed. I like your interior-looks like an airplane cockpit: did I notice some anti-radar jamming devise between the sun visors? What camshaft did you choose? I just had a thought-that explains the smoke coming from my ears....that hurts; I'll try not to do that again. Anyway, any of the admin reading this thread with the wherewithawl to create a new forum should do so where the members who have modified their powerplants could fill in the blanks which would create, on 'Hybridz' record, a profile something similiar to Myron's previous entry. No dialogue, just fill in the blanks; aka: Cylinder Heads, Intake, Carb/FI, Crank, Rods, Pistons, Cam, Trans, Rear Gears, Weight of car, type of rear end, 1/4 mile times/speed, balanced/blueprinted, ect. This would allow all the readers who are about to go forth w/their projects some food for thought(?) & we newcomers wouldn't have to ask questions most of you have probably already answered multiple times...whatdya think? [This message has been edited by Kevin Shasteen (edited January 10, 2001).] Quote Link to comment Share on other sites More sharing options...
Mikelly Posted January 11, 2001 Share Posted January 11, 2001 Well my car is "Detuned" due to the loose nit behind the screw driver (Me) but I currently don't have issue with wheel spin, and my buddy with the 426 stroker mustang (and lots of wheel spin) drove my ca rin the 1/8th and he noticed the same thing I did...get the car rolling in 1st and then when you shift into 2nd, go to the floor and hold it, shifing @ 6000rpms! My setup is with 26inch tall tires (265-50-15) and a 6 speed, with a 3:7 lsd in the rear. Car hooks hard and just goes fast...gives the exact feeling of being on a motorcycle (GSXR, CBR..) ! Mike ------------------ http://hometown.aol.com/dat74z/myhomepage/auto.html "I will not be a spectator in the sport of life!" mjk Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted January 11, 2001 Author Share Posted January 11, 2001 Thanks Mike; that's also what I'm looking for. Some real #;s to play with. Myron: you have T350 yielding 1:1 in 3rd, tire diameter of 24.07 w/minimal tire spin that'll to the 1/4 @ 117. Mike: You have T56 yielding 1:1 in 4th w/3.7 rear gear, tire diameter of 25.43 & shift at 6000rpm. If you can reach 6k in 4th in the 1/4 that should turn 122 mpr. Not to shabby. Keep it coming; anyone & everyone-these are the #'s I was looking for; thanks! Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted January 11, 2001 Share Posted January 11, 2001 Hello there, stock 350 with alumin intake, headers, and electric fan 200-250 hp?? 700r4 R200 3.9 15/50/225 Dunlap sport 8000 no wheel spin unless on sand, or wet pavement. give you my latested when I drive it in the morning Comp 270 cam and Double Hump Heads ------------------ "I feel the need, the need for speed!!" Quote Link to comment Share on other sites More sharing options...
Mikelly Posted January 11, 2001 Share Posted January 11, 2001 Kevin, I'm into 4th gear when I go through the traps in the 1/4... And it was just over 129mph when I did it. ------------------ http://hometown.aol.com/dat74z/myhomepage/auto.html "I will not be a spectator in the sport of life!" mjk Quote Link to comment Share on other sites More sharing options...
MYRON Posted January 11, 2001 Share Posted January 11, 2001 Kevin, My cam is a solid roller Crower with .554 lift on intake and .567 on exhaust with 1.65 rockers on the intake that bring the lift up to close to .590.. I cant remember the other specs off the top of my head... I have a complete breakdown list of everthing that I have done to my car along with the cost if you would like to see it I can email it to you direct... Just let me know... BTW: I am in Conroe TX, Where is the town that you are from? I have never heard of it. Myron Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted January 12, 2001 Author Share Posted January 12, 2001 Thanks for the 1/4 mile times Mike/Myron: tells me my math is not to far off from reality. Mike do you switch rear tires when running at the track? If you use the same tires & trip the 1/4 @ 129....your around 6300rpm's. Ellobo-w/your stock 350 & mods your've indicateed, w/AOD you should be 1:1 in 3rd. With 3.9 rear gears & 23.86 tire diameter: that should yield you the 1/4: 1) If you finish 1/4 @90mph = 4942 rpm's 2) If you finish 1/4 @95mph = 5217 rpm's 3) If you finish 1/4 @100mph= 5492 rpm's The trick of course would be to stay high on your rpm's. I'ld also like to know what the quality of your engine idle is: what rmp do your engines idle at? Myron: You asked where Ravenna is. You've heard of the "Boonies" well go past the boonies then get lost a few times then you'll be smack dab in the middle of Ravenna. Ravenna is near Sherman/Denison. I'm about 65 miles NE of Dallas. If I had a calculater that could do a Cube/Root of a number I could give approx 1/4 mile times; oh well-I'll snag one on my next trip to the big city of Bonham Tx. Keep the eng #'s, rear gear, tire size & track times coming. Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted January 12, 2001 Author Share Posted January 12, 2001 Kevin, My cam is a solid roller Crower with .554 lift on intake and .567 on exhaust with 1.65 rockers on the intake that bring the lift up to close to .590 Myron: What is the duration of your cam? That should be enough for now. I never even considered the rpm/power coming into play after 3k....thanks for the comment! So much to consider-I lose myself sometimes: if any of you see me before I do, please remind me that I'm looking for myself/thanks Quote Link to comment Share on other sites More sharing options...
Mikelly Posted January 12, 2001 Share Posted January 12, 2001 Kevin, I had the chance to run some 275-?-15 BFG drag ETS the only time I made passes in the 1/4. I don't know how tall they were, but the times were impressive. The tires hooked real well at the time. Now I just roll up to the line in whatever I have on the car. Funny thing was that about a year after I did the 1/4 mile times posted, I went and did an 1/8th mile track and I was in the high 8s!!!! Motor has beeen washed down a few times with sticking flaots, and my compression isn't what it was during those 1/4 mile runs! Mike ------------------ http://hometown.aol.com/dat74z/myhomepage/auto.html "I will not be a spectator in the sport of life!" mjk Quote Link to comment Share on other sites More sharing options...
Guest SuperDave Posted January 12, 2001 Share Posted January 12, 2001 I've found a free download called ShiftMaster at http://www.eec-tuner.com/public_html/down.htm that seems pretty real-world when calculating e.t.; it helps to know c/d or frontal area. Pretty much agreed with the above figures. Quote Link to comment Share on other sites More sharing options...
RickB Posted January 13, 2001 Share Posted January 13, 2001 Hey Kevin, I am located in Little Elm which is about 20 minutes due north of the Metroplex. I will be racing my V8 Z tonight just north of Denton at North Texas Dragway. I have a very mild low compression 350/700R4 combo with a 100 shot of nitrous. Mods include a Performer intake, 600cfm Carter carb, shorty headers and a mild torque cam. The car is also lowered and uses the stock lockup 700R4 torque converter. My car is kind of a sleeper as i race it with small 205/55/R14 Nitto Drag Radials. My last quarter mile pass (a month ago) was a 12.08@111+ with a 1.76 60 foot time (drag radials, pump gas and nitrous). The car hooks amazingly well on these little tires. I believe that my car will hook more consistantly with a stiffer rear spring. There is a very quick (low 10 second) IRS suspended Z in the area that i think runs heavier rear springs by suggestion of a HybridZ member. Call if you want to catch up with me sometime. 972-740-8421 BTW; I shift around 5200 rpm and use the factory 3.54(?) gears (open differential). The car weighs just over 2700 without driver and with a full tank of fuel. ------------------ RickB 280V8 http://photos.yahoo.com/bornabov [This message has been edited by RickB (edited January 12, 2001).] Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted January 13, 2001 Author Share Posted January 13, 2001 Hey Mike; were those drag tires 50's or 60's. Your 1/4 times & speed indicate they were 60's. Assuming your car weights @ 27001bs your engine is producing @ 450hp!!!! SuperDan-thanks for the site...I'll try it. Rick: I'ld look forward to meeting another V8z fanatic & enjoy seeing what a V8z can do in person. Just say when! I'll give you a call once I've completed my Illumina struts/poly bushings instal: just putting the finishing touches on it/no garage & the rain keeps delaying me. Rick: after crunching the #'s your gave I came up with this (this includes your N.O.S.) 22.88 tire diameter, 3.545 rear gears, 2700lbs & running the 1/4 @ 111mph shifting @ 5200rpm's. Drum Roll Please....., 1)Your engine puts out @ 285.55 HP 2)If you ran the tires Mike ran his ET's with "275/60-15's you'ld finish the 1/4 @ 135mph...theoretically! Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted January 17, 2001 Author Share Posted January 17, 2001 Myron, MiKelly & RickB, I bought a new calculator w/cube root & cubed funtion (#'s to the 3rd power) on it: and, I've had a few rainy days here to play w/the formulas. Here's my new set of #'s. Myron: You've indicated 450+ HP yet your ET's indicate 350Hp. This tells me either you're getting more wheel spin than you're aware or you need larger tires & steeper rear gears to take advantage of all that HP(talk to me) Your #'s indicate: 350HP, 5807rpm's @ 1/4 mile traps, and an ET=11.65 w/an overall gear ratio of 3.555(this includes your tires, rear gears & trans @ 1.1ratio. An 11.65 ET is nothing to sneeze at, however, if you have 450+ HP you should be clicking off high 10's in the 1/4 (Theoretically speaking of course). MiKelly: Your #'s included the 275/60/15's factored into my equations. The #'s came out to this: 469HP, 429 lbs.ft., 5729rpm's @ 1/4mile traps w/an ET=10.56 and your overall gear ratio comes to 3.657 (Thoretically speaking) RickB: Your #'s amounted to 325hp, 295lbs.ft. torque running 5781 rpm's @ 1/4 mile traps yielding an overall gear ratio of 3.5: also when I factored your theoretical HP & Torque #'s to come up w/ET...it was exactly 12.08!! Ellobo-still waiting for your 1/4 mile times in order to determine your HP/Torque; let us know ASAP. Any other #'s from anyone else. I dont have a V8 in my Z yet....so I can only dream/and play w/#'s. Its not the same but it occupies my time! Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted January 17, 2001 Share Posted January 17, 2001 Hello there, sorry have been away from the puter for a while. I haven't taken my car to the drag's yet, sorry. I just installed the 3.9 rear end, with 69 corvette heads double hump heads with 64cc chambers and I believe 2.02 exhaust and 1.9 intake(might have those backwards), and a Comp 270 cam. She is a screamer. As soon as the drags open up I'll take it down there, but right now the weather up here is completly crappy. Supposed to rain and snow all week. Is there some drags down near the tx/ok border that are open now? I know now I can get great launches even with the increased power. When the streets are wet though she breaks lose when shifting into second, and third (the bmw beside me didnt like that too much ) If anyone has info about the drags, Thought I heard something about one open in Denton, I'd drive down there and see what she could run. Sean Quote Link to comment Share on other sites More sharing options...
Guest kc6wfs Posted January 17, 2001 Share Posted January 17, 2001 [bold][h2] I have a very mild low compression 350/700R4 combo with a 100 shot of nitrous. Mods include a Performer intake, 600cfm Carter carb, shorty headers and a mild torque cam. The car is also lowered and uses the stock lockup 700R4 torque converter. My car is kind of a sleeper as i race it with small 205/55/R14 Nitto Drag Radials. My last quarter mile pass (a month ago) was a 12.08@111+ with a 1.76 60 foot time (drag radials, pump gas and nitrous). The car hooks amazingly well on these little tires. [/b][/h2] Hope my UBBcode works. never tried it before. RickB. Sounds like you have the same setup I have. Whats your HP of the motor? I have a 2000 vortec 2.02/1.60 valves and 10.1 compression. 330hp so they say. I'm running 14/60/235 tires and they grip very well. I have the stock 5 slot mags. I'm hoping to get it out to LARC to see how it does in the 1/4 mile in the next few weeks. I'm hoping in the 12's somewhere. Kevin, What does your numbers tell you? 330HP 2200lb I think, I'll weigh it at the track. 700R4 trans normal gearing, 3:54 rear end, 14/60/245 (not sure on inches round). Thanks. Dave Booth ------------------ www.geocities.com/kc6wfs/240z.html Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted January 24, 2001 Author Share Posted January 24, 2001 oops, [This message has been edited by Kevin Shasteen (edited January 23, 2001).] Quote Link to comment Share on other sites More sharing options...
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