Best exhaust for 454 engine

37 might be a little too much for the 454. Mercruiser OEM V8 BBC 45474L and 50282L Exhaust Manifold and Riser Kit w 3 Spacer.

1970 Chevy Chevelle Pro Street 454 Engine And Blower Detail Downtown Disney Car Masters Weekend Car Show Orl Chevelle Muscle Cars Camaro Chevy Chevelle 1970 from www.pinterest.com

Good Way To Estimate.

Best exhaust for 454 engine. My car was quiet with the 454HO and 25 Flowmaster Delta 50s. Went to Pypes 3 and their StreetPros in the 14 car was way too lod droned bad but did sound awesome. Installed 18 Magnaflows - perfect.

Added around 75-100HP car was way too loud again with the same exhaust. Added 22 Magnaflows perfect - almost a little too quiet. -Smaller tubes and single exhaust to a limit will move your power band lower in your RPM range-Larger tubes on up to full blown true duals or straight through exhaust will move your power band higher in your RPM range-Based on the specs of your motor it is safe to assume you are not going to see the high side of 5000 rpm.

Find CHEVROLET 74L454 Exhaust and get Free Shipping on Orders Over 99 at Summit Racing. 5 Off Your Mobile App Purchase - Get the App VehicleEngine Search VehicleEngine Search MakeModel Search. Exhaust system and the engine is in a motorhome.

Any other problems with 454. The 454 is just as goodbad as the 460. It burns a lot of fuel and really doesnt have the power to really do the job you are trying to make it do.

You can help correct this lack of power problem and correct the manifold problem by going to an after-market exhaust system. Many of the exhaust problems with the 454 can be attributed to undersize exhaust pipes. If you are pulling hard with a 454 and it has less than 2 12 in.

Dual exhaust pipes you are probably going to have problems. With the amount of heat and back pressure generated by a 454 I have seen them actually blow the exhaust pipes out of the manifold. A 454 which pumps more air needs the 3 inch exhaust in the same HP range.

The performance exhaust on the 350 3rd gen Camaros used a single 3 inch pipe. Ultimately displacement and HP will determin how big of pipe as Ed recommends. I think a 350 and 454 with the same HP the 454 would need a larger pipe.

For example a 500 horsepower engine would require a 5-inch exhaust pipe split into dual exhaust that means a 2-12-inch diameter pipe for each engine bank. This of course is a rough estimate and there are several complex mathematical formulas to help you discover the perfect size pipe to use for your hot rod project. Easy Way To Estimate.

Your intake system needs to flow 15 CFM per engine horsepower and your exhaust system needs to flow 22 CFM per engine horsepower. Good Way To Estimate. Take engine RPM x engine displacement then divide by two.

This is the intake volume. Stock Mercury OEM Big Block Chevy 454502 Cast Iron 4 Exhaust Manifold 3 Spacer and Riser Kit - 807078T08. Mercruiser OEM V8 BBC 45474L and 50282L Exhaust Manifold and Riser Kit w 3 Spacer.

Manifolds and 4 Risers Constructed from Cast Iron and painted with black corrosion resistant paint. The GM 454 74 is a great engine. The basic engine is a real workhorse.

The following is just my opinion. I feel that any coach up to 34 is just about the max for a gas engine. 37 might be a little too much for the 454.

That being said if you drive it right it should do the job for you. You might want to take I-80 across Nebraska and Wyoming. Hello I am building a 454 motor for my 24 go fast boat.

I basicly have a stock GEN 5 big block and all the stock stuff that goes with it. This motor is 300 HP from the factory. I want to get her up to the 400-500 HP range.

What I need help with is what is a good proven reliable set up with that kind of motor. Should I get a torker 2 intake 750-850 carb and get the stock heads ported. It is a Gen 6 BBC engine in a 102 tall deck height with a 4275 bore and a 4250 stroke.

Check it out and you will see the differences. The real beauty of this engine is with a good camshaft spec. A decent intake and carb with headers this engine will make 425lbft.

Of torque at 1800 rpms and produce 550lbft. Of torque at 3800 rpms. Later I built a 0040 over forged flat top 454 same heads as Mike head with 219 and 188 valves some porting a Weiand dual plane 1-34 Hedman Camaro headers and a Comp 268 cam.

It made 450HP and 480 foot pounds of torque it got 12 MPG with a 28 all steel goose neck trailer with 10000 pounds of cabbage on it there was maybe 2500. Topping the engine is a borrowed four-barrel Holley XP carburetor. 369996 for all but the carb.

567 horsepower and 537 pound-feet of torque on 89-octane pump gas. Quick Exhaust System Math. Easy Way To Estimate.

This is the intake volume. All engines benefit from an unrestrictive free flowing exhaust system. Big-blocks in particular because they generate a large amount of exhaust volume.

The traditional stumbling block of factory exhaust systems is the cast-iron exhaust manifold. In the case of bigblock Chevys the manifolds are better than they seem. GM Trucks with 74L Vortec Engine L29 Chevrolet Workhorse Motor Home Chassis from 1996-2000 L29 Benefits.

Gains of 30-35 HP and 35-40 lb-ft torque on 1996-1997 model years. Gains of 40-45 HP and 45-50 lb-ft torque on 1998-2000 model years. Gains of 12 - 2 MPG.

Downshifts less approaching hills. If you search for an efficient camshaft for a 454 then Comp Cams CL11-600-4 can be a good option. This hydraulic tappet offers a good lift and RPM range.

The camshaft duration is related to how much power it will offer to the engine. Therefore cams with longer duration are better. They help enhance engine performance.

This time a 454. I didnt need a big dually truck and that would be hard to fit on a dyno anyway. So I found this nice completely stock 1991 454SS which has the same engine as all the other 454 TBI trucks just these made 20 more hp and torque because they.

The 454 does not use a gasket between the manifold and cylinder head. If you install a gasket it will increase the chance of manifold warpage because the manifolds require the cooling provided by the coolant circulating through the cylinder head. The manifolds will warp causing the exhaust leak sometimes due to a broken bolt or a loose one.

I have a 454 Block from a 7577 Truck Edelbrock Performer RPM Alum Heads 6045 used GrdUp BBC MotorFrame Mounts AMC 103 Kit. Hookers 2455-1HKR Ceramic Coated Headers - Outside Diams 2 Tubes x 30 Long Collectors 35 x 10 Long. JEGs 520 2455-1 and only had to dent one tube a little that was touching the Steering Shaft.