I would have but was getting popping in the exhaust under heavy load. Combine that with cold temps. Wonder if I'll be pretty close once it warms up.
I went with the plug that is in a 1970 350 with the higher compression since I am at 10.6 compression. I don't think the extended tip plug is needed I was using the UR5 but changed to the YR5 for the nitrous I was using a TS43 before the nitrous and that plug worked good gap at .045
Would the ur5 be beneficial to me? My strap is way lighter than his in the photo. But that could be because it's too lean right?
I think I'll go one size up with the primary jets before I go to town tomorrow. Its close enough to be fun other than the pump shot. But if I'm too lean it needs corrected.
I don't know. I would not change your plugs until you get the jetting right. Best way to do that is with the wide band. IMO, you are absolutely wasting your time and money trying to read plugs with unleaded gas in the short term. The plugs Guy uses are racing type plugs, they are non projected. For a street car, projected nose plugs are the way to go.
There is a line on the J strap you want to look at and not the color of it the white porcelain should be tan white could be lean or the plug is too hot that is why you look for line on J strap I am actually surprised the Yr5 works good and I let the car sit now a lot just not working a lot because of the covid not much work.
Yeah the ur5 is fine it is best all around plug for the 350 I just looked in my junk drawer and I see I was using a R43TS which is extended some but not as much as the ur4 ngk. That plug still looked good lol.
I'll get the wideband ordered within the month of march along with the H pipe kit. I did the vacuum test and didn't see a drop so most likely no restriction. But will still order the 2.5" mandrel bent pipes for the last half of the car. The crush bent 2 and 1/4 pipes in that area up around the axle make me cringe.
The X pipe is a better set up than the H pipe The X does a better job of pulling from the other side. I used a ball and flange set up at the mufflers so I could take the whole X pipe along with the crossover together from headers to mufflers to take the trans out.
I read numerous articles that claim the H Pipe produces more low end power and x pipe is upper rpm power. I'm wanting more low end.
Thanks for the vid. H pipe is cheap and easy to install. wont lose much compared to x pipe but out performs straight pipes.
Has anyone here ever played with linkage rods to adjust the secondary opening rate? I have a link that provides a 1:1 opening ratio a 40% and a 60% the quickfuel comes from the factory with the 40% link installed.
I'm not well versed on Holley carburetors, but I have never heard of that. I would not mess with that though. Jets, power valves, and squirters? Yes, that? No. If you change too many things at once, this thread will add another 5 pages in no time.
60% linkage is good on the street from what I've read. Better gas mileage. It's super easy to swap out too. I bought a pump cam assortment yesterday and tried the brown one. once I was past the horrible bog the tires cut loose nicely. Took pumping it to get past the bog though. Dying for that 50cc to arrive. Hope it helps. I have a variety of different squirters and cams so I have lots of tuning options. Too many. Lol. The carb is fun and easy to work on though.
One of the things I dislike about the Holley double pumpers is that they feel like they open all at once. It makes the car feel more powerful for sure, but on the street, it's a bit much. I love it on the track though, and my 1000HO carburetor is consistently worth a tenth and a half a second, and 1-2 MPH in trap speed over the 800 Quadrajet. The Quadrajet is way better in feel on the street in regular stop and go, light to light driving. The throttle throw is much longer from closed to full open throttle. I think faster opening on the secondaries would make your bog even worse.
That's why I'm thinking about throwing the 60 percent link on there. Secondaries will open a little later than the 40 percent link that's on there. I can't do it today though cause I have a wedding 2 hours away to attend.
Yes, when easy driving it will save you some fuel. Double pumpers are instantaneously wide open when you mash the gas. I run the upper hole on my carb to have that longer linkage ratio purposely. Yes, it's a custom fabbed up throttle ball setup.
