When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Organized Drag Racing and AutocrossDrag racing and autocross discussions and questions. Techniques, tips, suggestions, and "what will I run?" questions.
I very much agree. also agree with what is being discussed about the 60 foot. for our cars with the 700r4 its in 1st gear the whole 60 foot so that eliminates the variable of a short/late shift. literally just launch and torque for the 60ft. late june i ran a 12.07 at 113 with a 1.70 sixty, recently I ran a 1.69 sixty and i think I can get it a touch lower. car is 3320 without me and 3500 with me in it.
All I can say is we will see what it does I can't say it will or wont 60ft good it has alot of torque I'm hoping that gets it off the line...should be pretty good once its rolling...lol
Nothing to worry about it's just grandpa's car...lol
I'm loving the inverted Atco Dragway reflection on the door....
If you're pulling 1.4x in the sixty foot, then you more than likely got my 6th gen. I was serious when I said it is only a few bolt on's and a tune. But, of course, it depends on what we consider to be "bolt on" lol. So long as no welding is involved, I consider every upgrade to be a bolt on, even torque converters lol. I'll still run ya either way....
I know 1.7 flat is achievable with a totally unspectacular suspension...
Originally Posted by Orr89RocZ
my exhaust only L98 would go 1.74-1.75 with converter and slicks on road handling suspension lol. More bolt ons it went 1.70-1.71.
i would say if you barely have enough power to go 11’s you’ll need closer to 1.60 60 fts. My 383 would go 1.55 on a mid 11 pass.
We're saying the same thing aren't we? It doesn't take a lot for 1.7x 60's.
And I'm on the same page for 11's and the power needed vs traction. If I could manage a 1.60 60', (and that would take more converter and probably rear gear as I mentioned although my slicks have seen way better days), I'd be sub 12's easily enough. And that's with the 288 cammed 255 CFM headed 355 as it is (or was). Step that up to 383 CID and the converter and gear might not be needed. I could get there on steam alone as the rest of the driveline is better suited to the increased torque and lower peak RPM HP result.
my exhaust only L98 would go 1.74-1.75 with converter and slicks on road handling suspension lol. More bolt ons it went 1.70-1.71.
i would say if you barely have enough power to go 11’s you’ll need closer to 1.60 60 fts. My 383 would go 1.55 on a mid 11 pass.
I think 1.7s are achievable anything better I'd be very happy...this wasnt meant to be an all out track car hense no drag suspension lol if it goes better then expected will just be happier...who knows car might surprise us.
Dont be discouraged at the first pass either. Play with the tune and shift points. I thought i had street tuned my 383 well enough and first pass it only went 115 mph and just got into the 11’s. I was expecting mids or better and closer to 120. Few more sessions and actual dyno tuning i picked up power and found et, wasnt long before it went 11.47-11.55 at 118-119. Theres always some improvement to be made it seems
Dont be discouraged at the first pass either. Play with the tune and shift points. I thought i had street tuned my 383 well enough and first pass it only went 115 mph and just got into the 11’s. I was expecting mids or better and closer to 120. Few more sessions and actual dyno tuning i picked up power and found et, wasnt long before it went 11.47-11.55 at 118-119. Theres always some improvement to be made it seems
Yes our tuner said the samething no way of knowing what it will do until it hits the track..I'll also be data logging and recording the runs so we can see what its doing..
Only thing I'm a little worried about he has the air fuel set for 13.0 wot I'd like 12.5s or so..I can change it via the handheld thats no issue but wondered why it's set there?
Ok little update I got the new TB and switched it out it's way better now takes adjustments and it doesn't have that bog/flat spot it did with the other one..this Is a brand new one vs our old one that he ported..
Also hopefully going to the shop this week to get the rear Fluid changed then hopefully off to the track soon...
Final two weekends passed for me, turbo and everything associated with it was recently removed from the GTA while the weather was still somewhat warm. Started prepping for an entirely new build for the Winter, but the 305 is still in there. Was thinking about throwing in some thinner head gaskets before I pull it out for good. Wanna race a whimpy n/a 305 when your're ready to run...?
Gerard, we're putting something together for Atco before they close for the weather. Probably the end of this month on a Friday. Dial that Iroc of yours in because these guys run very fast. Had mixed feelings about the Holley Sniper system until I seen Rick's S10 last night, this was literally five minutes after installing it. Belt squeal was fixed before taking it out for a few hits on the street. Was very impressed with how fast the Holley Sniper system corrected the air/fuel, popping was gone immediately after. Very fast ride even w/out the nitrous...
Ok spur of the moment we went to island.. I think we did pretty decent for the 1st time out.. there are a few things we need to address I want to put the MT drag radials on we are using nitto 555rs 2 I think the speed density boot is collapsing up top it was going rich on top... but I think it did ok not bad...lol what do you think..?
think it will go better? Being it was its first time out...
That's hard to say.
I checked the density altitude for Island Dragway today and at ~220', it certainly was a fine day for racing. (DA was below sea level earlier in the day!)
Nice MPH. Nice ET. Good 60'. Whose to say there's much room for getting quicker? That said, things like shift RPM's, dialing in the AFR's, maybe tweaking the timing, may yield a few more horsepower. And HP makes you go faster! I can't speak for traction. 1.6x for a stock chassis I feel is impressive. If you're spinning, then there's something to be gained there. A tenth in the 60' is two tenths at the stripe (or so they say).
First time or otherwise, those are still pretty good results.
She was spinning a little when trying to leave higher rpm those runs were off idle and rolling into.. we bought MT drag radials were going to put on next time out..also it was running a tad rich up top gotta lean it out a hair... all and all I'm very happy with the results no weight reduction and it being her 1st time out with it she did great very proud of her...
She was spinning a little when trying to leave higher rpm those runs were off idle and rolling into.. we bought MT drag radials were going to put on next time out..also it was running a tad rich up top gotta lean it out a hair... all and all I'm very happy with the results no weight reduction and it being her 1st time out with it she did great very proud of her...
With wheel spin and the launch technique used, it makes 1.6x even more impressive. From my perspective anyway. Not having a drag orientated chassis, traction has always been at a premium. Once I upped the power output, 60's became progressively worse although as I said, the ET Streets bias slicks were past their prime and have since been retired. (No pun intended).
If you've got something to be gained at the start, it'll all play out at the end. Why not 11's?
What are your shift RPMs? What do you cross the line at?
Wife was driving it she didnt look and I didnt data log I should have... it shifts stock 5200 I think probably would benefit from a higher rpm next time out we will have the MT drag radials and she wants to shift 2nd to 3rd herself see if that helps ET...
Wife was driving it she didnt look and I didnt data log I should have... it shifts stock 5200 I think probably would benefit from a higher rpm next time out we will have the MT drag radials and she wants to shift 2nd to 3rd herself see if that helps ET...
With 5200 RPM shifts, I'd say there's quite a bit more in it. I wouldn't hesitate to experiment. 6000 RPM doesn't seem unreasonable. You may be past peak then but it'll still carry on strong I would think.
With 5200 RPM shifts, I'd say there's quite a bit more in it. I wouldn't hesitate to experiment. 6000 RPM doesn't seem unreasonable. You may be past peak then but it'll still carry on strong I would think.
Next time out she is going to try that leave it in 2nd hold it and shift 2nd to 3rd wonder if that would help it go faster...?
NICE JOB MAN!!!
THATS GREAT FOR A FIRST OUTING!
- when I quickly skim read your first sentence, i was like, dude... I didn't see your car there last night.. then I saw the date on the slip and it was for the daytime session today!
I was at Island last night. The DA was great last night and also today, so you had great weather for racing. I will leave my account of my car in my own build thread, but now I am cutting some mid 1.6x numbers in the 60 foot and it feels great. I have the best 60 foot when I leave off of an idle. When trying to leave from a non-ilde my converter takes longer to flash. You might be the same. Only way to know is to experiment. same goes for the shifting. I think I am over revving my 1-2 shift but to me it sounds like you are under revving it.
keep it up! keep us posted. and if you are going again soon, maybe I will see ya at the track. we could make a nice side-by-side video !
NICE JOB MAN!!!
THATS GREAT FOR A FIRST OUTING!
- when I quickly skim read your first sentence, i was like, dude... I didn't see your car there last night.. then I saw the date on the slip and it was for the daytime session today!
I was at Island last night. The DA was great last night and also today, so you had great weather for racing. I will leave my account of my car in my own build thread, but now I am cutting some mid 1.6x numbers in the 60 foot and it feels great. I have the best 60 foot when I leave off of an idle. When trying to leave from a non-ilde my converter takes longer to flash. You might be the same. Only way to know is to experiment. same goes for the shifting. I think I am over revving my 1-2 shift but to me it sounds like you are under revving it.
keep it up! keep us posted. and if you are going again soon, maybe I will see ya at the track. we could make a nice side-by-side video !
I didn't want to clutter up your thread, but since you asked... I finally met my goal of getting into the 11s. I had been "stuck" running in the low 12's for a few months time. Oddly, every pass I made last night was high 11s, but my fastest pass was my first one of the night with what I would think was the "softest tune" I used all night ?!?! I still have to look at the datalogs in detail, but I posted up a detailed account of my evening at Island dragway in my thread here: https://www.thirdgen.org/forums/tech...install-4.html
11.85 at 115.5mph was my best of the night. my 60ft then was only 1.69, but the very next pass I got a 1.64 that felt nice.
Last edited by IROCZman15; 09-20-2020 at 12:09 AM.
I saw your thread congratulations!! I was shocked to say the least when she pulled a 1.67 60ft and 12.3 on her 2nd pass ever on this setup I think it has more especially since its only shifting at 5000 to 5200 stock shift points and she couldn't come off the line using the convertor the nittos didnt like it..I have a new set of MT drag radials I gotta throw on also I forgot to data log...lol so I have no.idea what it was doing so I'm thinking there is room for improvement lol
very nice. I am still trying to figure out my shift points. I think I know what the car likes best for a good launch. It has taken me many track days to get this far, and I am only really going off of trial and error, and advice from people on this board and people in person. Datalogs help but that is new territory for me too.
keep it up. Hope to see ya at the track one day too.
Haha, just realized that. Had a rough day Gerard, I'm exhausted so I'm seeing things lol...
You'll get there either way. Your wife must have been stoked after that pass. Tell her congrats...
- Rob
Thanks Rob
She had a huge grin on her face.. lol
She couldn't even launch it off the convertor the nittos wouldnt hook so the passes were all done by rolling off the line lol i.think it might have high 11s in it.
Your 383 w/LPE 219 cam has been taken deep into the 11's with the Corvette guys running similar setups. You have all the ingredients to do the same, and possibly better than them. Like the guys mentioned above, get all of the bugs worked out, increase that RPM, and launch that damn thing. Forget the grinning, she'll be doing cartwheels once she gets back to the pits...
That's funny Rob!!! She died laughing when she read this...lol can't wait to get out there and do it again I bought a set of MT ET street SS drag radials I know they hook...
Really not bad on a set of 555r’s. Those the older 555r 2’s that have stiff sidewall for road race or the new 555r 2’s for drag that are suppose to be awesome?
mickeys are way superior to the base 555r and road race 555r2. I suspect the new 555rII are just the same compound as the great nt05R tires but similar 555 tread. Mickey still should be better. But the nt05r isnt a slouch by any means
play with the tune, log it up top to see what the kpa is doing and fix the rich condition. Try shift points, theres probably another 1-2 mph there and high 11’s
Really not bad on a set of 555r’s. Those the older 555r 2’s that have stiff sidewall for road race or the new 555r 2’s for drag that are suppose to be awesome?
mickeys are way superior to the base 555r and road race 555r2. I suspect the new 555rII are just the same compound as the great nt05R tires but similar 555 tread. Mickey still should be better. But the nt05r isnt a slouch by any means
play with the tune, log it up top to see what the kpa is doing and fix the rich condition. Try shift points, theres probably another 1-2 mph there and high 11’s
They're the 555r drag radials I already bought a set of MT ET street SS drag radials they will be going on next.. it wasn't rich it was sucking oil in thru the pcv I ordered a catch can to solve that..also how can I make it shift higher without shifting the governor right? My wife will shift it but I'd rather make it more point and shoot...lol kpa was 101 that day and 98 to 99 kpa wot runs.
I really think it's the rpms hurting the full pull... funny she couldnt come off the line hard it would spin bad on the nittos so she rolled into and still did 1.6x 60fts I was more impressed with that... I really didnt think it was going to be as fast as it was being it was her 1st time down the track with the new setup.
I always held in gear and manually shifted. If the governor shifts earlier than desired then holding it in 1, or 2 will allow you to go higher then move shifter to next gear. I did that at 6800-7000 with my 383 lol worked good
I always held in gear and manually shifted. If the governor shifts earlier than desired then holding it in 1, or 2 will allow you to go higher then move shifter to next gear. I did that at 6800-7000 with my 383 lol worked good
I was trying to make it more consistent I know B&M makes a governor kit to raise shift points ...
But she still try shifting it higher next time out...I want to make the car hook 1st then the next issue will get addressed..
Again this went faster then I expected it to especially for its 1st pass down the track
...But she still try shifting it higher next time out..
Do you have the stock shifter? If you do, rather than than more test and tune via a governor recalibration, an aftermarket gated or ratchet style shifter is about as close as you get to "point and shoot" otherwise. Used with a shift light, it's bang, into the next gear. Fun too.
Do you have the stock shifter? If you do, rather than than more test and tune via a governor recalibration, an aftermarket gated or ratchet style shifter is about as close as you get to "point and shoot" otherwise. Used with a shift light, it's bang, into the next gear. Fun too.
Yes stock shifter and the indicator is off lol I need to buy a new one D is OD and OD is nneutral so I'll have to buy a new shifter plate from hawks so it lines up..she wants stock looking so the gated it out lol..
she will learn it just need a new shifter plate that actually lines up with the corresponding gear...its off
It's not so much the shifter plate and the alignment but rather the inability of the stock shifter to register the next gear without going further. Like going from 1st to 3rd. Or worse yet, 2nd to neutral! Which will always lose you races. It's a racing comfort to just be able to ram the shifter into the next gear without having to do it gently...and slowly.
There are a few out there that are very innocuous and will blend it well with the interior.
That said, if that's what the boss wants, that's what the boss gets.
It's not so much the shifter plate and the alignment but rather the inability of the stock shifter to register the next gear without going further. Like going from 1st to 3rd. Or worse yet, 2nd to neutral! Which will always lose you races. It's a racing comfort to just be able to ram the shifter into the next gear without having to do it gently...and slowly.
There are a few out there that are very innocuous and will blend it well with the interior.
That said, if that's what the boss wants, that's what the boss gets.
Yes she always shifted her 91 z28 she has owned that car since 3 years old she will shift this one now at the track too we didnt think we had to i.would have thought he set that up knowing cam specs etc etc...
... i would have thought he set that up knowing cam specs etc etc...
That would be a bit of a crap shoot for even for the best builder. Too many variables to consider and the end result is generally an educated guess.
My primary racing opponent (as in life long friend) has had a similar platform to mine for years albeit in a different chassis (one of several for him). A few years back he moved into the 4L60E platform and has a separate controller for the transmission. He sets his shift points through the handheld programmer. His 10 second '67 Chevelle is truly a no shift monster.
That would be a bit of a crap shoot for even for the best builder. Too many variables to consider and the end result is generally an educated guess.
My primary racing opponent (as in life long friend) has had a similar platform to mine for years albeit in a different chassis (one of several for him). A few years back he moved into the 4L60E platform and has a separate controller for the transmission. He sets his shift points through the handheld programmer. His 10 second '67 Chevelle is truly a no shift monster.
We should have just gone 4l80e so we could have used the holley to control the shift points I mean the car has a great computer for tuning could have taken advantage of that with an electronic trans... we have a strong rear ..I think decent motor it is a built 700r4 but its old school compared to the reset of the build...well guess it's back to shifting lol..
08-25-2020, 09:51 PM
