Ls2 402?
Ls2 402? Hey guys, I am going to buy a 402 from TSP and I have a question. I have a set of Rapid Motorsports stage 2 ls1 heads with 2.02/1.60 valves. Rapid heads are ported big and flow pretty well but I don't know how well they will work with big cubes. I am going to shoot for about 11.5 to 1 compression with the 248/254 cam, Fast 90/90 intake and I have Jet Hot 1 3/4 headers. My question is how much are the smaller heads going to hurt this setup? I hate to buy new heads again and lose the 2k that I payed for my Rapid heads. How much power do you guys think I can make with these heads and what would be the difference with PRC stage 3 heads? Thanks in advance.
More info to help power estimates. My setup includes 3 inch y pipe with no cats, cut-out, asp underdrive pully, 12 bolt with 3.73, M6 tranny, and I believe the Rapid heads are basically the same as AFR 205's.
Id pony up for some badass heads if i had already spent thousands on the short block....You can always sell the heads you have to offset the cost. Personally i like the ETs but since they arent available Id go with the AFR 225's....
Originally Posted by cantdrv65
Id pony up for some badass heads if i had already spent thousands on the short block....You can always sell the heads you have to offset the cost. Personally i like the ETs but since they arent available Id go with the AFR 225's....
i'm in the same boat.i need a shortblock since mine has a knock so it's time to up the size as well.i have the tea 1.5s and i know they will be a crutch,but i plan on keeping my qtp 1 3/4 lts and single 3" catback and am wondering since i will be mostly street if i should just keep the heads i have and just shoot for maybe 480-500 rw or bite the bullet and get ets or afrs.decisions,decisions !
I have a 1/2 used 1/2 new 402 w/AFR's forsale.
https://ls1tech.com/forums/lsx-parts-sale/474885-402-ls2-afr-225-heads-sale.html
https://ls1tech.com/forums/lsx-parts-sale/474885-402-ls2-afr-225-heads-sale.html
Originally Posted by 2ktransam
Hey guys, I am going to buy a 402 from TSP and I have a question. I have a set of Rapid Motorsports stage 2 ls1 heads with 2.02/1.60 valves. Rapid heads are ported big and flow pretty well but I don't know how well they will work with big cubes. I am going to shoot for about 11.5 to 1 compression with the 248/254 cam, Fast 90/90 intake and I have Jet Hot 1 3/4 headers. My question is how much are the smaller heads going to hurt this setup? I hate to buy new heads again and lose the 2k that I payed for my Rapid heads. How much power do you guys think I can make with these heads and what would be the difference with PRC stage 3 heads? Thanks in advance.
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Originally Posted by fuzzyfine
Why don't you have Rapid build you a 402. He is the best in the area
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Joined: Dec 2004
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Sorry to intrude on your thread, but I was thinking about TSP's 402 too. I sent them an e-mail a while back and still haven't heard anything. So, does anyone here how well the internals they put in will hold up? (eagle, scat, and mahle) 500 HP is nice and all, but I want to blow and spray up to 500 more and am unsure as to whether or not those internals can take the abuse.
Thanks,
-somebody
Thanks,
-somebody
Launching!
Joined: Aug 2004
Posts: 248
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From: Ashland, Ky
Originally Posted by Somebody09
Sorry to intrude on your thread, but I was thinking about TSP's 402 too. I sent them an e-mail a while back and still haven't heard anything. So, does anyone here how well the internals they put in will hold up? (eagle, scat, and mahle) 500 HP is nice and all, but I want to blow and spray up to 500 more and am unsure as to whether or not those internals can take the abuse.
Thanks,
-somebody
Thanks,
-somebody
Just give them a call, i called today about my underdrive pulley and jason was all over it, just call and they will help u out any way possible
Originally Posted by Somebody09
Sorry to intrude on your thread, but I was thinking about TSP's 402 too. I sent them an e-mail a while back and still haven't heard anything. So, does anyone here how well the internals they put in will hold up? (eagle, scat, and mahle) 500 HP is nice and all, but I want to blow and spray up to 500 more and am unsure as to whether or not those internals can take the abuse.
Thanks,
-somebody
Thanks,
-somebody
