70 buick skylark custom ta performance intake 650 holley 2 inch spacer sniper nos kit holley nos controller 2.56 rear posi 10 bolt bm shift kit hooker super comp headers fast duel wide band 225/60/15@15 psi I was meant to run about a year back but due to problems with car and money it did not happen. so here goes 1st run on motor only got 15.0827@91.97 mph. 2nd run motor only got 15.2862@92.01. mph 3rd run 63/71 jets 50% use through nos controller ramp from 0-50% over 1st 2 seconds 13.4617@101.65 mph 4th,5th,6th run sprayed same as 3rd run 50% no ramp time spray from start but got no traction. 7th run 100% same jets as 3rd 2 second ramp time 13.7459@103.82 mph loss of traction at start. 8th run same as 7th run 13.0463@104.30 mph. any ideas to get better et
I'd say more rear tire cross section would be a good start. Or a different tire with a different compound. Or a different tire pressure. It's going to take lots of runs with the same combination to become consistant with the car. All those small parts of the procedure need to be as lose to the same every time.
325/50 MT ET street radials.. 3:73 gears.. Higher stall converter, and a 750 carb... Those puny tires will never hook up with Buick torque..
First off a few questions: 1. What is your total timing and what rpm is it in by? You should have about 28-32 degrees depending total with the nitrous shot 2. Do you have a possi? If not get one forsure, I prefer a locker. Get some ET street tires in the 275/60/15 size 3. Have you tried a larger carb? you should gain about .5 of a second by going to a 750 when off the juce. 4. Have you considered head porting and a cam to match? http://www.v8buick.com/showthread.php?t=120529&highlight=heads head porting thread:http://www.v8buick.com/showthread.php?t=120529&highlight=heads < Click thumbnails :Comp:[/QUOTE] http://www.v8buick.com/showthread.php?t=73182&highlight=alive http://www.v8buick.com/showthread.php?t=167545&highlight=nitrous And guys combo: Here are some more tips: http://www.v8buick.com/showthread.php?t=110669&highlight=nitrous+350 http://www.v8buick.com/showthread.php?t=86721&highlight=nitrous+350 http://www.v8buick.com/showthread.php?t=110669&highlight=nitrous+350 http://www.v8buick.com/showthread.php?t=86721&highlight=nitrous+350
Another cool trick that works well for me is using 295/50/15 tires with the 2.56 gears. Do not use a tall tire with the 2.56 gear, stay a bit short to effectively give the car better mechanical advantage. A Buick 350 and TA212 cam along with the 2.56 gears has also worked well for me and the lock up th350-C trans is also good for a few mph once in 3rd gear. The 2800 actual stall in my transmission torque converter lets me take advantage of some torque multiplication by flashing up to 2800 rpm when I power brake the car and leave the line. From 3000 rpms and higher the 2.56 gears perform well, however if you lug do not get the rpms up out of the hole then your 60 foots will be slow. What rpms are you shifting, and what is the car weight?
Hi guys wow loads of info thanks. Total timing is 30 deg all in at 3000rpm could have it all in quicker forgot springs for distributor.I have got a 10 bolt posi,Race weight is 3850lbs.I do have larger tyres they are bf goodrich 255/70/15 but they lost me time shifting at 4800rpm.
thats insane for 2.56 gears, my dads 396 nova runs a best of 13.3 so far with 3.73's and a 4 gear. Your doing really well with what you've got.
How do your spark plugs look? In general, I don't like the idea of the way that most nitrous controllers on the market operate, so you this has me concerned. Ain't nitrous fun? -Bob C.
I am using a stock cam and the plugs looked a good,except plug 6 which looked like it was running lean a bit.wide band showed i was in the 13-1 range.
So your current 225/60/15 tires are about 25.5" in diameter and a set of 275/50/15 would be almost exactly the same. Without a set of drag radials you are going to have serious trouble getting traction out of the hole with the nitrous... Try a set of these. http://www.summitracing.com/parts/MTT-3753R/
i am in the uk so shiping would be high what about these http://cgi.ebay.co.uk/Mickey-Thomps...ItemQQptZUK_Cars_Tyres_RL?hash=item53e08ec5a5
From what I've read all through here, you need 3 things to go faster. More gear, sticky tire, and more fuel pump(presuming stock mechanical). I would suggest a 3.23-3.31 range and a 26" tall drag radial. If its going to be a track only spray car then a 26" by 9 or 10" slick should work nicely. Also I recall cyl 6 being a lean cylinder in my car, use this cylinder to tune for if you are useing the stock mechanical pump then this is most likely your lean conidtion. Because you should be PIG rich with the jetting your using now. My car would not make a full pass the 150 shot before running out of fuel. Also Pull 2 more degrees out, unless your running 100 or higher octane fuel. Good Luck with the car, good to see someone else out there spraying and having fun with there SBB!!!!! I know I enjoyed mine.
I'd get a nice MSD 6 or some other ignition box. That will make sure the plugs fire nice on every run. A set of cold plugs. Non extended R42t or R42s. I'm not sure which one is the non-extended. Yes on the electric fuel pump. Running low on fuel with N2O will melt things in a hurry. Yes on short gummy tires. The Sportsman Pro are ok but won't get the traction of the M/T 275 50 60 Drag radials. It seems to me if they sell one kind of M/T tire they would sell the other over there. Yes on a bigger cam. The 212 would be great with its wide 218/230 I/E duration split. A Stage 1 cam would do the trick also. Of course the headwork would help but the cam is easier and costs way less unless you can do most of the work yourself. Remember if you do get a converter stay on the low side unless your traction really improves because the converter will flash higher when you hit the N2O. I'd get the tires and try the full N2O off the line without the converter. Until you can do that a higher stall converter(or gears) won't be worth anything except more spin. Keep ramping the N2O up faster to 100% off the line. That's where your big gain will be. However the converter and bigger gears will make a bigger gain off the juice if that is where you want it. Air bags in the rear springs will help back there. A 750 carb wouldn't hurt.
i am running an elderbrock Quiet-Flo™ Electric Fuel Pump 1791 fuel pressure is set at 6psi which supplies a holley regulator which feeds both carb and nos.As for gears i live to far from track and want to keep the 2.56 gears.fuel is 97 octane and far to expensive in the uk.I have a mallory nitrous 6 but when i connect it up i get a massive hesitation between 2000-3000 rpm still cant work out what is wrong it.
i am running standard points but when i connect up the mallory nitrous 6 to the points the car runs with the hesitation.I have re-jetted the carb 66 jet front 72 rear runs 13.5-1 on wide band.all ok on just points
I know that those Mallory Nitrous 6 ignition systems are designed a 12 volt distributor. The points dist. you are using is NOT 12 volt setup, I would upgrade to either a HEI with MSD internals or have a magnetic trigger added to your points dist.
