What Rwhp with this 402 combo
What Rwhp with this 402 combo Hey guys. I'm doing a 402 LS-2 build with AFR 225 heads, fast 90/90 setup. Cam specs are 238/240, .605/.608, 113 lsa. Any idea what kind of HP I will make with this and should I have gone with a bigger cam ? I'm hoping for around 510+ at the wheels.
Thanks
Ron
Thanks
Ron
TECH Enthusiast
Joined: Jun 2004
Posts: 544
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From: Itasca, IL
Im thinking the exahust is going to be a major choke point. Macs are good and all but they are still inferior to long tubes on a stock engine, let alone a 402 LS2. Not to mention its still going through cats, and a flowmaster. All I can guess is <500 with your current exhaust and >500 if you upgrade to some true duels or something.
Originally Posted by Mrbowtie26
Hey guys. I'm doing a 402 LS-2 build with AFR 225 heads, fast 90/90 setup. Cam specs are 238/240, .605/.608, 113 lsa. Any idea what kind of HP I will make with this and should I have gone with a bigger cam ? I'm hoping for around 510+ at the wheels.
Thanks
Ron
Thanks
Ron
TECH Fanatic
Joined: Nov 2003
Posts: 1,380
Likes: 0
From: The point of no return...
Cam shold definitely be bigger in my opinion. I would also get rid of the Macs and get a set of longtubes. If you want to save money go with something like Pacesetter longtubes.
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Originally Posted by Mrbowtie26
Hey guys. I'm doing a 402 LS-2 build with AFR 225 heads, fast 90/90 setup. Cam specs are 238/240, .605/.608, 113 lsa. Any idea what kind of HP I will make with this and should I have gone with a bigger cam ? I'm hoping for around 510+ at the wheels.
Thanks
Ron
Thanks
Ron
AND THEN YOU CHOKE IT OFF WITH MID-LENGTH HEADERS, CATS, AND SLOWMASTERS? ARE YOU NUTS?
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Originally Posted by black_knight
You're buying a big $$$ huge flow 90/90 and a big $$$ huge flow AFR 225 on a big $$$ big power 402...
AND THEN YOU CHOKE IT OFF WITH MID-LENGTH HEADERS, CATS, AND SLOWMASTERS? ARE YOU NUTS?
AND THEN YOU CHOKE IT OFF WITH MID-LENGTH HEADERS, CATS, AND SLOWMASTERS? ARE YOU NUTS?
definately think the exhaust is the first thing to go......... the cam isn't small, but a 402 ci motor would definately make good use of a bigger cam. it depends on what you want to do with the car. rwhp numbers are HUGELY affected by what kind of drivetrain you are running..... a little info on that would be helpful for guessing those numbers. if you're running a 6spd through an aluminum driveshaft and stock 10 bolt... i still think you wouldn't see 500 at the wheels. upgrade the exhaust and you might see 500... go with a bigger cam and get the 510+ you want.
My guess is you will see about 415 RWHP. If you upgrade to Kooks stepped LT's, ORY, and a hi flowing cat back like a magnaflow you'll probably pick up another 75 HP for a 490+ RWHP number.
Originally Posted by Cyborg
My guess is you will see about 415 RWHP. If you upgrade to Kooks stepped LT's, ORY, and a hi flowing cat back like a magnaflow you'll probably pick up another 75 HP for a 490+ RWHP number.
Originally Posted by Mrbowtie26
75 HP by switching from mid length headers to full length, and switching muffler type ?
Originally Posted by Mrbowtie26
Any suggestions on a muffler to use without cats that wouldn't sound too tinny ? More of a deeper sound if possible.
yes, I do have access to a meineke shop where I used to manage and I could fab something up but. I would be open to consider a true dual setup but I would want to go all the way out back.
Thanks
Ron H.
Thanks
Ron H.
Originally Posted by Mrbowtie26
yes, I do have access to a meineke shop where I used to manage and I could fab something up but. I would be open to consider a true dual setup but I would want to go all the way out back.
Thanks
Ron H.
Thanks
Ron H.
Oh, but you absolutely positively HAVE to use mandrel bends. I had a crush bend-setup fabbed by a bunch of jokers at a Merlin and it cost me 25 rwhp. I have before and after dynos to confirm.
