Not sure, but I noticed your not running a breather on the drivers side valve cover... don't know if that will help it along or not??? just a observsation... Good to see some videos of your cars... I'll have to make one, one day.... Thanks for sharing your rides....
Never thought of that:idea2: I am running it as it came out of the factory and I did just get it all back together but I will consider this when I tune the car. Thanks for the input:laugh:
I have been so busy this last month the buick has been on the back burner. I can't wait til I get the motor back and see how The serpintine belt set up I made and the turbo headers and tubing all works together.i am hoping for big power but also a car that is extremely dependable ans a great driver. I would love to take a nice cross country drive in early june with the Buick. Any shows or Buick events worth long hauling to from mass?
Seemed very healthy, could we get some specs on that setup? I took the Wildcat out for a spin on Friday..
If your talking about my nailhead look at the thread "couldnt go to yardleys so". Have some info and pictures. just a big carb,big cubes, TT rockers, comp cam, headers basicly. Also I have better gears in it now.went from a 4 speed manual to 4 speed auto still getting used to that. If you are talking about Pauls turbo engine its not back together yet.
Mine is a .030 over 401 that was line bored,decked,heads have new guides, seats, springs,keepers,machined .010. new ross forged pistons, file fit rings, arp rod bolt, arp main studs, arp head studs, stock forged rods recondition, stock forged crank cut .020, Intercooler and Garret t67 turbo 7psi but will be hitting it up to 12psi. Tial 44mm blow off valve, tial wastegate, stainless steel custom turbo headers with t4 flange, CSU holley 750hp carb with ev carb hat, msd ignition 6BTM box, MSD distributor,Serpintine belt conversion using a 3.8gn crank pulley and custom brackets. I run a areomotive a1000 fuel pump with -10an feed and return lines. i am hoping to have the car completed in time for my july wedding. It will be close but all i can do is keep plucking away at it. Paul i do have some current pictures from the other night, i just have to load them from my ipad. I was having some issues being it is my first time with a ipad.
Was talking to the machine shop today and they had to go .040 over because their was not a quality ring available at .030 over. He said we will be using a chrysler ring. Pistons should be in this week so bottom end will be assembled within the next two weeks? Paul 66 lark gs turbo nailhead
Why can't you use a 455 Buick ring? the 401 shares the bore diameter with the 430 and the 425 shares the bore diametet with the 455. Rock Auto show 0.030 over rings for both the 425 and the 455 and both are the same part number. Ed
425 455 bore is 4.3125" std. 430 401 bore is 4.1875 + .040 =4.227 "different size" Both take 5/64 and 3/16 ring pacs Your ring pac is probably 1/16 1/16 3/16 W
I'm planning on getting the cam in over the weekend, we'll see if that actually happens. Finally got all the parts together. Not 100% sure on the springs - the motor was rebuilt about 10 years ago, and some springs a little stiffer than stock were used. I figure they should be alright, since they were used with a stock grind and don't have many miles on them. As long as I keep the rev's down everything should be kosher. Ideally I'd do the heads (springs & porting) at the same time but I don't have the time or money, so that'll just have to wait. Should sound a little something like this... http://youtu.be/xbVnwv6mlHU
Yep, the Comp Cams Thumpr. 227*/241* @.050, 107* lobe separation, 102* intake centerline. Valve lift is fairly mild especially with stock rockers. It'll be installed straight up. I've talked with two Nailhead guys running it in an otherwise stock motor and both are pretty happy. Should net about 30 peak horsepower over stock, with a significant average power increase from 3500-5000. Torque shouldn't suffer much either. I was contemplating having a cam custom ground, but the Thumpr was close to the specs I wanted (aside from the 107* LSA, I would have gone with 108* or 110*). Plus I got the cam and lifters for the cost of a custom grind so I can't complain, plus no wait time. It may not be the best choice for my application, but it should perform damn good, and I'm sure a big 4 door Buick thumpin' like that will get folks staring! :bglasses:
how much lift can stock heads handle before the keepers hit the guides. Ross flycut valve reliefs for over .600 lift in my new pistons. What should i watch out for? need a set of roller rockers. i ran a .630 , .630 in my 406ci and loved the cam but hatted the fact i had to run a vac canister. Paul
For those that like pics, here are a few in progress shots. Should hopefully finish getting it torn down tomorrow, and get everything buttoned back up.
I have been wondering how the thumper would act in a nailhead. So far we have only seen idleing videos. Andy do you remember what your desk dyno told you the thumper would do?
Paul, going from memory, I believe it was around 0.480" lift limit on the stock valve guides. I know I have it in my notes, but I gotta find it! Tom T posted the info somewhere too. Andy, will that cam fit? v-p clearance is gonna be real tight with 107 deg lobe separation....if it fits at all. Also, Comp is using a 1.5 rocker ratio to determine valve lift. I was getting a 1.6 ratio with my stock '66 rockers. A 1.6 ratio is gonna give you 0.510"/0.496" lift, not the 0.478"/465" they advertise. Specs here: http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=1515&sb=2 I hope it works for you, but it looks like trouble to me. Good luck!
