unknown_host

iTrader: (1)

My immediate thought was your tach is off, because I had the same combo with the same tires and gears and was not breaking 6,000 rpm crossing the traps at 112, I think I was at like 5700 or 5800.

GreggymacZ28

Yeah, maybe i should get a new tach! I usually shift by ear anyway, but i was thinking those rpms were pretty high.

GreggymacZ28

Ok just a few updates on my car! First of all i was telling you guys about the traction issues i was having with the 26" tall tire. So i purchased the lca and panhard rod kit and then some relocation brackets from founders performance. They are a very nice and solid product and no complaints there at all!

I went to the track last night and i ran 12.67 at 107.4x every run but once when i hooked a little better and got a 12.60. But my 60' was 1.78 every single time no matter how big the burnout. I also have a linelock now to help with the burnout. With the 28" tire i was getting 1.66 to 1.68 60' with no suspension mods and an lca angle that was messed up.

Overall the car is very consistent now just was wondering why my 60' is dropping off.

mw66nova

iTrader: (13)

what was the DA? it's been hotter than hell here and i was nearly 2 tenths off to the 1/8mile two weeks ago.

GreggymacZ28

The DA was a little higher than last time, but yeah its been hot here as well! It was 2450 instead of 1800 when i ran the best time. My mph was suffering some as well, but i didnt know that the DA would effect 60' that much?

GreggymacZ28

Would i see any performance gains from a super victor single plane intake? I'm launching from 2800 and flashing higher than that, so i was wondering if that intake would help me more at the top end, and they say it doesnt lose low end?

mw66nova

iTrader: (13)

no. if anything, you need to be running something like an rpm air gap. super vic intake is for engines seeing 7500+ rpm

GreggymacZ28

Ah okk thanks! I think i'm peaking out power wise for these heads,haha. I'll just have to wait till an exceptional DA to try for an 11.99.

xpndbl3

iTrader: (5)

no your combo still needs improving before the heads are the limiting factor, keep tning and adjusting

GreggymacZ28

Any suggestions?

Orr89RocZ

iTrader: (20)

verify fueling?

GreggymacZ28

I was wondering if that was hurting me actually. I have the q-jet on there which is what made the car actually run in the first place. But it's on there with an adapter plate, and i didnt know if that adapter plate is a major restriction or what? Im a little leery on going back to a holley after the last time.

mw66nova

iTrader: (13)

you had a piece of junk before that had been messed with by someone having no business around car stuff or other real men type things... a well setup 750 quick fuel or the like will run circles around what you have.

GreggymacZ28

Yeah, i was thinking i shouldnt let that sway me. I'll have to get a new carb then and try it out. Is there alot of tuning to be had after purchasing a new quickfuel? Or do they come with pretty good tunes out of the box?

xpndbl3

iTrader: (5)

you jet for every motor, shouldn't take you more than 5-6 passes to get it pretty close though

GreggymacZ28

Right, jetting's fine for me, i just didnt know if you needed anymore extensive type of tuning, im not the greatest in that area.

So my next upgrades im going to be doing to the car are, Quickfuel 750 carb with annular boosters, an rpm airgap intake, and longtube headers with dual exhaust exiting before the axle(Right now i just have hooker shorties and a hooker y-pipe and i cut the exhaust right after the y-pipe and put a downpipe, so open headers basically).

Which one of those upgrades will give me the biggest gain in et first and is the biggest restriction as of now?

mw66nova

iTrader: (13)

downleg boosters...you don't need annular. that's for engines with super tall intakes and no booster signal

GreggymacZ28

Ah okay i had read annular was best for fuel, but im sure thats for alot more radical builds than mine. That'll save me 20 bucks! So do you think the carb is going to be my biggest performance gain then?

mw66nova

iTrader: (13)

i believe it will help. hooker super comps longtubes and a proper exhaust system will be worth a ton too. you are going about this a bit backwards, trying to get exotic on the intake side when the exhaust side is still basically stock type exhaust system, lol.

always make it breath out correctly first before it can breath in more. even then, the cam/heads aren't going to want to go more than about 6500ish even once you get a proper exhaust system on it.

super victors and annular booster carbs are for 14:1 engines that go to 8k, not for street motors with vortec heads

fyi, even with 550+hp on tap, i'm using a downleg booster carb on my lsx engine, and only shifting at 6800 rpm

GreggymacZ28

lol okay thanks man! I appreciate all of the information you're always offering! Yeah, vortec heads supposedly are bad on the exhaust side too...i probably will do the exhaust before the carb, as im tired of never being able to street drive this thing. Thanks again!

mw66nova

iTrader: (13)

i think there is a lot to be had in the exhaust system. long tubes, true duals, with magnaflows or some other straight through muffler. don't put flowmasters on it, otherwise you'll be back where you are, lol. an x-pipe would be great too

GreggymacZ28

The exhaust you mentioned was exactly what i had in mind. i wanted longtubes with an x-pipe to magnaflows dumped before the axle. I know i wanted magnaflows because they are a better performance muffler and now i just want the thing to be a little quieter so im hoping the magnaflows will be the best of both worlds.

mw66nova

iTrader: (13)

you'll be happy with that setup.

GreggymacZ28

I installed some longtubes a couple days ago( hedman longtubes). Only 1 5/8 primaries, but i figured they would do. I went to the track tonight and i just put some down turns off the headers. Well, i have a new best time. I'm having a very hard time figuring out if im happy with this time or upset,lol. Here's how the slip looks.

60 ft: 1.6721
330 ft: 4.8859
1/8 ET: 7.6119
1/8 MPH: 89.82
1000' ET: 9.9840
1000' MPH: 102.51
1/4 ET: 12.0050
1/4 MPH: 111.38

I couldnt believe that i missed it by .005....I went back and ran again, but spun like crazy with a 1.82 60 foot and then the track closed. The carb was cutting out on take off and then the car would take off, so im sure with a tuned carb it woud run alot better. Oh well, i guess i'm just that much closer now to my 11 second pass!

Sprayed92

well judging by the et and mph id say the car picked up some power to say the least just gotta do some supsension tuning

mw66nova

iTrader: (13)

awesome news!

GreggymacZ28

Yeah, it was bike night at our track, so they decided they wouldnt prep the track. It took the 3 cars there spinning out and ready to hit the wall for them to decide they should prep it a little better. When i go for the points race im sure itll hook up alot better.

GreggymacZ28

Thanks man! I'll get it there sooner or later!

355sleeper

iTrader: (4)

Thats awesome, im going to the track august 3rd so hopefully i will be right there with you!!!

mw66nova

iTrader: (13)

So what have we learned today? Street exhaust has no business on a racecar

GreggymacZ28

I was hoping I would learn that! Hopefully i'll learn a q-jet and adapter dont belong either and pick up a few more tenths.

355 sleeper: Let me know what you run. I've been waiting!

bluegrassz

iTrader: (3)

I know how you feel. My times are in my sig. So close to the 11's I could taste it. Sad thing is, I had the mph for 11.9x's.

Orr89RocZ

iTrader: (20)

CONGRATS. combo is coming around now. Still think you have some carb tuning to do to make sure things are correct and find max power. Exhaust really opened it up.

mw66nova

iTrader: (13)

you may 60' better with an exhaust system on it like we were talking about. the x-pipe helps bottom end torque a decent amount. was worth .05 in the 60' for my car.

GreggymacZ28

Thanks guys again for your help!

Orr- yeah i know i was hoping the exhaust would help it out, maybe the x-pipe will help it some more.

Bluegrassz- yeah i see that! I couldnt believe i got that close without getting there,lol. But you have a good mph im sure youll get there no problem at all!

mw66nova- Yeah that's what i am hoping for, it seems like my car must have some good torque because my mph's and 60's arent as good as others yet my 1/8 mile et is just as good if not better. I'm thinking that the q-jet i have now is makin me run a little lean, so with a full exhaust itd help that out as well along with all of the other benefits.

pancherj

I tried turn-downs on my car once and it did not like it at all. I lost a ton in the first 330'. My Mufflex Y into a single 3" exhaust works a lot better. Hopefully you find something similar with a true exhaust with a cross over.

Excellent times by the way. I've read a lot on here lately about Gen 1 small blocks not being able to run with heads, cam and intake...

GreggymacZ28

Yeah, that's one thing i like about my build, is that it is one usually people do not want to run if they are talking anything about low 12's. Everyone at my track always asks me where my nitrous is.... I painted my linelock black for that very reason, some random people would see it and think it was a nitrous solenoid....even though it clearly has a brake line,haha.

But on the exhaust, i did the turn down's basically to just show me the difference between shorty headers to longtubes. I wanted to see that gain first, then what i get with the full exhaust. I'm hoping with what you guys said the full exhaust will help me out, i just dont want it to hurt my mph.

GreggymacZ28

I was thinking about getting a 4.10 gear for my car, what do you guys think? Will it help me et wise at all?

DNSTA

Most likely if you run the 4:10's you'll want those 28" tires back. I run 4:10's with 26's and run out of gear at the big end. Still looking for some 28's before I get back to the track. Milan as well.

mw66nova

iTrader: (13)

what are you going through the traps at rpm wise right now?

GreggymacZ28

DNSTA - yeah that was also one of my worries. I do still have 28's though but after spending what i did on 26's i wouldnt want them to go to waste. And really? Maybe ill see you out there sometime!

mw66nova - Like i said earlier my tach probably is off, but im sure the shiftpoints should tell you alot anyway. I shift from 2-3 at 7000 on my tach, and i go through the traps at 64-6500. It seems like i have a little more gear to go?

bluegrassz

iTrader: (3)

You wouldn't be interested in a tach with shift light would you?
Same one here.
http://www.summitracing.com/parts/ATM-233905/

mw66nova

iTrader: (13)

4.10s would raise you up about 300 rpm going through the traps, but can make 60' harder to be consistent with the 26" tall tires. i'd put a known good tach/shiftlight in there and see where you're actually at. shifting "blind" put me close to half a second slow in my 6.0 combo when i first started working out the kinks.

built91Z28

Agreed. My car spins so much I can't go off my times, but last time I went to the track I expieremented with shift points. Shifted at 6000 and I ran 104 mph, next run I shifted at 6500 and ran 105 mph. Then I did two runs shifting at 6300 and ran 109 and 110 mph. My motor seems to be picky about wanting to be shifted at exactly 6300 rpm. I'd get a good tach ASAP.

GreggymacZ28

A buddy of mine did some math for me last night, and by the looks of it it appears my tach is actually correct...which has me really confused. Here is the math though....

My tach says i am passing through the traps at 6400. so...

6400 rpm * pi * 26" tire / (3.73 gear * 1056 constant) = 132.7 mph if i had a convertor clutch engaged. So divide that by 1.19 (He has the same convertor as me and decided he'd calculate his convertor loss as well, and noticed it was also 19%) convertor loss = 111.52.

My mph was 111.38. So apparently my 7000 rpm shift would be correct then? The only reason why i ever have said my tach is off, was because almost every other person ive read with a similar engine combo to mine isnt at the rpm's I'm at...

Also i get what you guys mean about shift points, but the numbers on the tach werent really effecting where i shift, ive expiremented basically every rpm on the tach, and 7000 is where it makes its best, if i go to 71-7200 the mph drops off after the 1000'. I shift at anywhere from 65-6800 and it also drops 2-3 mph. And if i shift at around 6000 i tried once, the car fell flat on its face and lost 5-7 mph on three different runs.

mw66nova

iTrader: (13)

way too much converter slippage...should be in the 5-8% range. what converter are you running?

GreggymacZ28

Okay that's something i was trying to know, i wasnt sure what the average convertor slippage was which made me wonder about his 19% slippage number.

I have a 3500 ******* convertor. I'm pretty sure the company is closed now, my dad ran their convertors for years and said they were the best he'd ever owned, so we put one we had in my car.

GreggymacZ28

Aww crap... i forgot about the weird word blockages on this cite, it was a R..e...d..n..e.c.k convertor.

GreggymacZ28

Well... my goal has been met! An 11.91 @ 112.56 mph.

I noticed the other day that my car was running hot with the new headers, so i bought some thermal tape and put it on my fuel lines, and took my catalytic convertor's heat shield since i dont need it anymore and formed it as a shield to my fuel lines where they were closest to the headers. I also changed out my antifreeze for water with water wetter. So the car ran nice and cool.

So today was the sunday point series and i went up for my first time trial, and i pulled off an 11.94 @ 112.36 mph. So of course i was happy and that was finally my 11 second i wanted. Then i pulled up for my second one, and i got my new fastest time of 11.91 @ 112.56. I ran 11's almost all day, but to avoid losing some races i let off to run some 12.00's.

Anyway just thought i'd let you guys know i hit my goal! I'll post up a pic of the timeslip sometime to show everything. Thanks again to everyone who has helped me get to where im at!

1gary

Greggy,I never doubted you would get there.Congrats.Refresh my memory.Do you now need a roll bar going faster than 11.99??.