Big Cam Idle Problems. As some of you have been following along with my problem. Check out
As some of you have been following along with my problem. Check out these tips on how to get that carburetor to play well with your lumpy cam. Some say retard and others say advance the spark. Borrowed a May 6, 2021 · The problems begin with a big cam that requires a more open idle speed primary throttle position which uncovers the transfer slot. I was reading old posts over at the place and some suggested that it was a bad fuel rail pressure regulator (FRPR) or it could also be a loose reluctor wheel on the Mar 9, 2023 · What is the cam? I have a fairly large cam in my LT1 231/246, . The building is set to complete in 2026. Oct 2, 2002 · Yes using manifold vacuum advance will clean up the idle with a big cam but I have found it to end up being a real pain. You can use a desktop dyno to see where the engine is predicted to be post all details Jan 19, 2011 · using a Quadrajet with a big Cam Pontiac - Street PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > using a Quadrajet with a big Cam 21 hours ago · Start the 6. 140. For a long time now I have struggled to get my personal ls7 swapped camaro with a large btr stage 4 cam to idle consistently. Aug 2, 2021 · I had a big cam that would start and idle perfectly, but seemed to be running out of fuel when you tried to take off, it had a tiny hole rubbed in the braided line from the tank to the pump. Keep Your Brakes Strong, Even with a Big Cam Running a high-lift camshaft? Then you know the struggle, low vacuum at idle means weak brakes when you need them most. Jul 6, 2012 · As a daily driver this cam would suck big time. May 19, 2002 · I am at the end of my rope. just had it rebuilt with 190cc/64cc aluminum heads with maximum valve lift of 0. Jul 19, 2022 · SNIPER WITH BIG CAM EFI Tech PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > EFI Tech > SNIPER WITH BIG CAM My first big cam LT1 tuning experience too, so big learning curve. 600 , big mutha thumpr cam, comp cams 1. What I'm working with is a 402 bored 60 over, makes a 413. Chip tuning or Torque Converter? [HELP] - All, Well, after a new top end on the L98, we're at the tuning stages and having some problems. We achieve this by setting the cams to have high overlap, example cam angles: 0,40 ; -10, 30; -20,20; -20,35 (ivo, evo). I just swapped to a smaller cam for better street manners. Also if you have really big cams you will get a more stable idle by Jan 23, 2018 · C3 Tech/Performance - Big cams and low vacuum - As we all know big cams produce low that cause vacuum operated components such ad the brake booster and the headlights. 050 in. May 24, 2005 · You probably have a high overlap cam which results in a low vacuum at idle and having to open up the throttle blades to get an idle. Aug 12, 2008 · hi! stock is 6-8 degrees, you can go from 10 to 20 degrees at idle with a bigger cam, I would start with 12-14 degrees BTDC at idle, with your comp ratio 36-40 degrees full mecanical advance and you want full advance around 2500-3000 RPM. EPA targets loomed. 4 Powerstroke was built under pressure. " Leon Rost - Partner, BIG Flexible lighting systems designed by BIG and manufactured by Italian Artemide create ambience effects that form comfortable, natural lighting throughout the school day. Idle tab > adaptive and predicted; add 10% - 20% to get more chop. Sometimes it will Oct 14, 2010 · i know they bleed off cylinder pressure especially at low rps due to overlap but what is the physics or actual cause of bucking??? am running a 244/248 HR on a 10. Carbureted hot rods have always struggled with making their fuel mixers perform with low-vacuum idle engines. In most cases, the amount of advance is a lottery when the grinder fits the existing stock to the new grind Dec 13, 2018 · Maintaining Idle Stability with big cams may require adding more ignition lead to compensate for ineffective carburetor idle mixture screw adjustment. Lately it's been pouring out blue smoke at startup, idle, and at normal operating temp. Specs for Big Mutha Thumper: Comp Cams 249-12-602-4 Exhaust Valve Lift (in. Duration @ . That's what the control system is for, so you should use it accordingly. The new motor is a 383 with Dart Pro 1 heads and the Howards cam and lifters package. Ive done the RV and similar cams with no problems but never the big lift cams. Feel free to copy and Paste this little cheat sheet, and add and post your info: ENGINE SIZE: FITECH SETUP USED: ENGINE VACUUM: CAM SETTING (1,2,3, or 4) AND YOUR CAM SPECS Aug 3, 2015 · Hey everbody, I'm looking for some more experienced insight in to the best timing set up for my engine. edle brock 454 sqaure port aluminum heads, pop up pistons by sealed power, and a lunati solid lifter cam with about 660 to 670 lift. The basics of the ghost cam is that we want the car to have high cam overlap during idle. 486Intake Valve Lift (in.