I just had my carb adjusted last night... it wasn't to bad before but was restricting the fuel, and i caped off the vacumn advance as well.
we also made the vacumn secondaries manuel secondaries and wow what a difference... its like a whole different motor.
Tested it out last night at the shop and it runs 1st 2nd and 3rd in two wheel hi loc ... was in second gear doing donuts and felt the rear tire comeing off the ground so i had to let off before she.went over.
Now i can't wait to try some 110... its going to be my first time with race fuel ;D
if it runs good on regular it wont run any better on race gas your wasting money
really? every one i know say its a big difference
race gas is harder to ignite, if your not spraying nitrous or hearing spark knock your just paying for a good smelling fuel
Well i got a souped up big block buick so i figure i am going to give it a try... if i notice a difference i will keep run it if not i will go back to 93-94 premium.
i wouldnt waist the money on fuel fix the carb so it works right bop motors can be tricky to make run right what ya got on top for a carb????
Quote from: mutt truck on March 16, 2011, 05:21:59 PM
we also made the vacumn secondaries manuel secondaries and wow what a difference... its like a whole different motor.
And just how exactly did you do this? ==roll
It is not possible...well it is but then you would have a major bog because there is no secondary fuel shot like there is on a mechanical secondary carb, this is why mechanical secondary carbs are called double pumpers.
you know if you tuned it right you may get more power out of it. but i know people that fix thing half ass are happy with it. for holleys make spring kits for the secondary. so thay open faster.
Its a 670 exclusive built carb from holley... the tech guy says it is worth some bucks but whatever its the only one i got so for right now ima run it.
we put a bolt in the bracket for the secondaries just past half throttle i believe... what ever he did it worked cause that thing runs REAL good now... huge difference!
if you got built big block that 670 is small . if your motor is 10.1 or less you wont see or feel diff in 110 vs prem our hobby is $$$$$$$ enough without wasting $$$$ on things dont work them buicks are torque monsters stock good luck with it ;D
if you dont have spark knock you dont need 110 my buddy runs his 11.5 bbc with 50/50 mix 92 and 110
If your motor is not "built" to run 110 it won't do any good but waste your money. higher octane gas is made to prevent det. but it does smell better
Who did the tuning on your carb?
Quote from: bigmud44 on March 17, 2011, 10:54:04 AM
if you got built big block that 670 is small . if your motor is 10.1 or less you wont see or feel diff in 110 vs prem our hobby is $$$$$$$ enough without wasting $$$$ on things dont work them buicks are torque monsters stock good luck with it ;D
Yes i am thinking thaty it is only9.5:1... And the carb is a bit small but that will give a crisper lower end. I will play a little and see if the top end breaks up at all, if so i am going to have to try a different carb.
Quote from: puddlejumper on March 17, 2011, 04:42:48 PM
Who did the tuning on your carb?
a friend of mine whos uncle does it for a living... I tell ya this is the best the truck has ever run... its runnin really good right now.
first of all it dose have hardend seats right? second vacome secondary is acually faster in the long run or a hard pull, (becouse it opens slower it isnt drowning the engine) and
on a race car you want double pump mecanical secondary, (the fuel shoots in from 4 corners) and will have a huge bog to it the bog is becouse so much gas and it acually slows you down, but you can have a engine built enough that it will have no bog. or going to a smaller carb usally will do it. Like for instance my 2500 lbs camaro had a 350cid manual tranny and a 750double pumper wasnt to big or to small i acually had a 850 center and flaps on the 750 proform with 101 jets and alot bigger on the back. but for a 8200 to 8500 rpm engine it was pretty good. but a truck say a 350 cid id go with a 500 or even a 600 carb with an auto but manual id go mabe a bit larger 600-750 but if it dint run better id be ready to swap to a smaller carb, you want a good hard pull with out lots of mantenance.
Yup got hardened seats in the heads... also dual valve springs in them. If one of my friends got like a 750 or 800 i will try it but if it don't do better the 670 going back on.
Thnx fer all the info guys... learned a bit about race fuel.
what dose hardend seats have to do with the size of carb? or valve springs? I have worked machine shop for 12 years. you can not just a carb on and thank its goning to run the best. you need to tune the carb for the motor you putting it on. like squirters, cams, power valves.
and that is what i was trying to say (for MY 350) 750 all modded was fine but for yours or anyones is different differnt usaly by lbs thats why i gave my 2500 pound camaro for instance. 670 is probly good for a tourq motor that has alot of lbs, but the carb i just said dont put a screw or bolt in it it dont have a big shot of fuel to cover the large air hole up you just made by puting the screw in it, so there for it will pop and posibly in the car you wont hear it. but tuning (1/4 mile) is how i found it. AND HARDEND SEATS i asked becouse i was curious...... OK
id say dont mess with an already good thing thats PROOVEN.... just my ==2cents
Well all i know is what he did made it run loads better. I will know alot more once i get er out in the mud but as of right now 100x better.
Quote from: 4x4xdodgeman on March 17, 2011, 12:29:04 AM
you know if you tuned it right you may get more power out of it. but i know people that fix thing half ass are happy with it. for holleys make spring kits for the secondary. so thay open faster.
what he said
Quote from: mutt truck on March 19, 2011, 11:47:35 AM
Well all i know is what he did made it run loads better. I will know alot more once i get er out in the mud but as of right now 100x better.
must of been really bad before then? some people on here have good info & you should listen to there advice & do things right the first time, there is a correct way to tune an engine .you should always set the timing before anything else
Na it wasn't bad before... i thought it was good and it was. But now it is spectacular. I am really happy with it.
I know my boss did the same thing on his holley put a screw in the secondairys and said it was way better but he had a built 460 with lots of head work and a monster cam i think the 750 was just to small for him he ended up buying an 850 eldelbrock so take that for what its worth its just my two cents and sometimes i dont even listen to me lol