you are correct. ordered my carb and they suggested a 750 blow thru. I ordered and 850 and it is still not enough. lol
Have an Aeromotive with boost reference and wonder what would cause the fuel pressure not to adjust below 10 pounds ?
After I took the regulator apart, I made a return to empty to a gas can and it does alright. So I guess it has something to do with the line going back to the tank.
Hey guys i thought its time to post in this section now.. My sbb twin turbo build is comin.together. Mark burtons new style manifolds, t04e turbos 60trim, on 8psi, intercooled with a 4150 blowthrough carb. I m in the process to put it together i just did the IC installation and finishing the piping for the intake. I also updated the fuel system to a RobbMc Powersurge 1000 system. I will run a locked out timing dizzy at round 25-28* Thats the plan at least. Here a couple pics
Glad to see the boosted Buick world growing again. Do you have the ability to pull timing? My experience with a 455 and 8 pounds of boost would be that is too much timing. When doing boost be real conservative with timing at first. Start at about 22* then go up from there. Every engine combination is different so there is no set answer to this. If you can afford it get an MSD 6530 box and then you can really dial in timing.
I would like to avoid getting another box even though the 6530 is great. I wanted to lockout at 25* i also have a msd start and step box. Brand new laying arround, that would give me a manual way to pull timing from the cockpit if needed. It also helps with the cranking i think so i might use it.
I have a question, and I mean absolutely no disrepect to anyone (gotta appreciate the work that goes into these setups): Are there any turbocharged 455 cars that are really putting down the power? I see some 11 second cars in this thread, but I didn't see anyone deep in the 10's or the 9's, which I find surprising. I see the procharger builds are really working, but I was interested in doing a 455 with twin GT3582's and wondered if it was really worth the effort. I've seen an Olds build that was diesel-like; doing over 800hp by 5000 rpm. Seems like it could work with a Buick. I'm thinking small cam, fast spooling turbos, low rear ratio, for the ultimate sleeper / driver. GN's seem to do well with this type of a build.
There is this one. Will run a lot better when the motor has a crank in it. The 520" will be over 2000hp, the 560" closer to 3000 hp. Should be able to turn 10's.
Common misconception,...on a big block even a mild one you'll want a larger exhaust than compressor wheel, you also need a minimum of a .96 ar, otherwise it will be out of steam by 5k and be worthless power, as it will just never hook up. A stockish 455 with a single 88 would be better than small twins , two BWs366~72's would be a killer setup for a street bound 455
Makes sense... thanks. I'm rethinking the whole idea. It would be easy to make big torque... maybe too easy. I don't think it would be the best setup for a street/strip car because of the traction issues. I also have an 86 231 that would probably work, but I like the idea of not having to deal with much over 15psi. Seems like a bomb waiting to go off if the tune is not right. A 350 with a single 7875 would probably be the best of both worlds.
