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95SevilleSLS

Beefing up a 425

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I'm going to be beefing up my 425 in my deville later this year and I need some links to people that sell products to beef them up. Are you able to stroke this engine? I've heard that the valvetrain should be beefed up if I want to start getting more power out of it, is this true?

I really want this thing to pump out the power, but needs some help. Thanks!

Edited by 02whiteSTS

-Dusty-

- 02 Seville STS, white diamond

- 93 Sixty Special, Tan with vinyl top

- 79 Coupe DeVille, Tan with Tan top

- 06 GMC Sierra Z71, Black

- 92 Silverado C1500, black and grey

- 83 Chevy K10 Silverado, Black and Grey

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Long, long ago....in a galaxy far, far away...

Edelbrock made 2 intakes for the 425, the STREETMASTER and the PERFORMER.

The STREETMASTER was, as it's name implys..for the street. :D

It gives more power at low to mid range RPM. 2500 to 5000 or so.

The PERFORMER was for mid range (3500/4000) on up to about 6500/7000 RPM.

Back then, there was a company in California that made cams for them.

On my '78, I removed the cats, had TRUE DUALS installed, with an "X" pipe and ran a medium cam, with the STREETMASTER and a 650 Holley double pumper. It ran pretty well. :D

I did not do anything to the valve train, but if you are going to run real high RPM (6000 +)...you are right. You need to beef up the valve train.


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You know...I had a 75 eldorado that had a 500 in it, but I sold the car a couple of years ago because I needed the money...I'm regretting that now.


-Dusty-

- 02 Seville STS, white diamond

- 93 Sixty Special, Tan with vinyl top

- 79 Coupe DeVille, Tan with Tan top

- 06 GMC Sierra Z71, Black

- 92 Silverado C1500, black and grey

- 83 Chevy K10 Silverado, Black and Grey

b80385550.jpg

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You know...I had a 75 eldorado that had a 500 in it, but I sold the car a couple of years ago because I needed the money...I'm regretting that now.

Do a search for "Joe Mondello" on the west coast. I have a 1966 Olds with a 425 in it. Got all my engine parts from him. He specializes in 400 403 425 & 455.

Good luck

Mario

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