454 performance

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Jan 22, 2003 | 02:53 PM

srmcclean

Thread Starter

Intermediate

Joined: May 2002

Posts: 41

Likes: 0

From: orlando fl

454 performance

Ok guys give I want to hear your performance recipes for the 454. I am starting with a 1987 peanut port head 454 (originally a TBI motor). I do not plan on revving past 5000 rpm. My goals are conservative but I would like 340 horspower at the flywheel and at least 450 lb ft. I would like the power peak to be around 4000 rpm. What cam along with a 750 quadrajet, performer intake and headers will get me to my goals. :D

Jan 22, 2003 | 06:35 PM

Ganey

Race Director

Joined: Apr 1999

Posts: 11,520

Likes: 13

From: CORVETTE 77 385 C.I. TEXAS

Re: 454 performance (srmcclean)

Hedman headers will work fine & good for much more.
Comp Cams 270H or XE268 will put you over as your goals are too low. They are good min. 454 cams for autos.

:cool:

Jan 22, 2003 | 08:30 PM

The Money Pit

Melting Slicks

Joined: Jun 2002

Posts: 2,844

Likes: 99

From: Orrtanna Pa.

Re: 454 performance (Ganey)

I've used the Edelbrock Performer cam before in a Poncho 400,and it would pull 5000 easy,idle like stock,and I'm sure was better than 350hp.I'd have to agree that your sights are a bit low for that much motor.You realize your gas mileage is dependant on displacement. You may as well pull 450-500hp if you're going to get 10mpg anyway. :yesnod:

Jan 23, 2003 | 10:25 AM

bence13_33

Safety Car

Joined: Aug 2000

Posts: 3,909

Likes: 26

From: Clymer PA

Re: 454 performance (srmcclean)

Quote:

I would like 340 horspower at the flywheel and at least 450 lb ft.

Good god, 340 horsepower should be a walk in the park even with a "broomstick" cam.

So you are going to be using the P-Nut port heads? The cams that Ganey recommended should work fine for you because those P-Nut heads are going to be done making power around 5000RPM if not slightly sooner.

Jan 23, 2003 | 10:35 AM

StrayDog

Safety Car

Joined: Feb 2000

Posts: 4,977

Likes: 38

From: Massachusetts , USA,

Re: 454 performance (srmcclean)

as you are very conservative on RPM , (5000) The xe262 , range is 1300/5600 rpm, the xe 252 is a 5000 rpm cam , with monster tourque will work with peanut heads...just my 2 cents :seeya

Jan 23, 2003 | 10:48 AM

fredfryguy

Instructor

Joined: Oct 2002

Posts: 171

Likes: 0

From: Southport North Carolina

Re: 454 performance (srmcclean)

Hey! I just did the following mods with oustanding results to my 454 LS5 engine. I had a valve job to the stock heads and added a 268 Comp Cam kit ( new springs, lifters, timing chain, retainers, etc), new Comp Cam roller rockers and pushrods.
The seat of the pants were AWESOME. It is smooth, powerful and free reving. Best results I ever experienced in modifying an engine! The motor stock is 365 HP and I think it must be pshing 400+. I'll probably dyno this spring. By the way the car is a 71 TT, 454, 4speed. Good luck, Fred the fryguy :steering: :D :cool: :cheers:

Jan 23, 2003 | 02:39 PM

srmcclean

Thread Starter

Intermediate

Joined: May 2002

Posts: 41

Likes: 0

From: orlando fl

Re: 454 performance (srmcclean)

Thanks for the reply guys, I hope the guy hasn't sold the 454 yet I can't pick it up until tommorrow evening!! If I get more than 340 horsepower I will be thrilled.

Randy :cool:

Jan 23, 2003 | 02:54 PM

75 BBC Stingray

Racer

Joined: Oct 2002

Posts: 328

Likes: 0

From: Marlborough MA

Re: 454 performance (srmcclean)

It seems like everyone is recommending the Comp Cams product, but I'm buying either the Crane "PowerMax Hydraulic Roller HR-288-2S-12 IG", or their solid roller "SR-238/350-2S-12 IG" (very similar to hydraulic, but slightly more duration/lift)
There was a nice build article using the hydraulic roller in the "How to build Monster BBC's" book. When I plug the cam into DD, it has a nice torque curve to about 4,200RPM.