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402 or 427

This is a discussion on 402 or 427 within the Internal Engine forums, part of the LSx Technical Help Section category; I wouldn't mind a ProCharger on my 402....

  1. #21
    Slow'er'Ass Mr. Luos's Avatar
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    I wouldn't mind a ProCharger on my 402.

  2. #22
    Member 408WS6's Avatar
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    Current best: 10.60/126.8
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    Quote Originally Posted by Mr. Luos
    I wouldn't mind a ProCharger on my 402.
    Can you IMAGINE the power that it would make...

  3. #23
    Slow'er'Ass Mr. Luos's Avatar
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    I like the 527 RWHP it already makes.

    13 PSI with lower compression would be nice.

  4. #24
    Member 408WS6's Avatar
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    Current best: 10.60/126.8
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    Quote Originally Posted by Mr. Luos
    I like the 527 RWHP it already makes.

    13 PSI with lower compression would be nice.
    Yup, 13 psi would work real well with my lil 408. I'll have to settle w/ a 250 shot of nitrous for now

  5. #25
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    For the guys that love the 427 you can get the Warhawk block instead of the C5R. Here's a link http://www.worldcastings.com/prods_pages/086210.htm. The block costs $3,999 which is much less than the C5R and it's much improved as well. If you haven't heard about this block (it's fairly new & GMHTP did a 6 page article about it in their March 2006 issue) check it out...it's SICK! That block can use a stroker crank to go to 454 as well. It's gotta make some awesome power, but obviously will cost $$ to build.

  6. #26
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    Oh, I forgot to add this to my last post...Mr. Luos your car is sick! Ever run that baby in the 1/4? I bet you'd post some awesome numbers.

  7. #27
    Senior Member mrr23's Avatar
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    Quote Originally Posted by bad99ta
    For the guys that love the 427 you can get the Warhawk block instead of the C5R. Here's a link http://www.worldcastings.com/prods_pages/086210.htm. The block costs $3,999 which is much less than the C5R and it's much improved as well. If you haven't heard about this block (it's fairly new & GMHTP did a 6 page article about it in their March 2006 issue) check it out...it's SICK! That block can use a stroker crank to go to 454 as well. It's gotta make some awesome power, but obviously will cost $$ to build.
    if they can ever get the foundry to make the warhawk blocks, you can get one. and the first 20 or so are alreay taken.

  8. #28
    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by bad99ta
    Oh, I forgot to add this to my last post...Mr. Luos your car is sick! Ever run that baby in the 1/4? I bet you'd post some awesome numbers.
    Thanks.
    12.64 at 115.44 MPH.
    Spinning....DA=7200

  9. #29
    Evr sena bdgr killa snak? Roastem's Avatar
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    Quote Originally Posted by Mr. Luos
    Thanks.
    12.64 at 115.44 MPH.
    Spinning....DA=7200
    I would think you should trap at least 125 mph with that beast.

  10. #30
    Slow'er'Ass Mr. Luos's Avatar
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    I would....if I didn't race where the DA is 7000-8000.
    Bandimere Raceway....5800 feet above sea level.

  11. #31
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    Quote Originally Posted by Mr. Luos
    I would....if I didn't race where the DA is 7000-8000.
    Bandimere Raceway....5800 feet above sea level.
    WOW...that does play a big part. I'd say with a much lower elevation and a good tire you'd run mid 10's or something in that range.

  12. #32
    Slow'er'Ass Mr. Luos's Avatar
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    Biggest problem is the rear right now.
    Soon.

  13. #33
    Junior Member Duke of Cruel's Avatar
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    Quote Originally Posted by Mr. Luos
    I like the 527 RWHP it already makes.

    13 PSI with lower compression would be nice.
    Turbo and 13 or better 18 psi would really make it fly
    I am buildin a huge inch ls engine with turbo, and is aiming for 1200 hp
    for a 2600 pound 4wd cossie

  14. #34
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    Quote Originally Posted by Shawn
    Well the other good thing about your set up is that your heads are ready for anything you can throw at it, maybe just a freshen every so often. With the smaller valves you can only go so far with your set ups, so I actually like your set up. Who did you get your parts from? I used Thunder Racing in the past but they do not do larger engines and I have used Agostino before but they are to expensive.
    I was the head builder at ARE for 6+ years and now I am doing engines on the side alot cheaper then most out there. I actually have a 402 short forsale in the classifieds... I would reuse the old heads, maybe give them a freshen up. Maybe a cam change would help a little power but still cost effective...
    Dave

  15. #35
    Evr sena bdgr killa snak? Roastem's Avatar
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    Quote Originally Posted by bad99ta
    For the guys that love the 427 you can get the Warhawk block instead of the C5R. Here's a link http://www.worldcastings.com/prods_pages/086210.htm. The block costs $3,999 which is much less than the C5R and it's much improved as well. If you haven't heard about this block (it's fairly new & GMHTP did a 6 page article about it in their March 2006 issue) check it out...it's SICK! That block can use a stroker crank to go to 454 as well. It's gotta make some awesome power, but obviously will cost $$ to build.
    If you are gonna spend that kind of money, go with the 454. That is how Chevy is going to outdo the current Z06 LS7, they are gonna punch it out to 454 cubes for the 2008 model year. A 454 LS motor with some WarHawk P&P Heads and a big cam is gonna land you in the 600 to 700 HP range, Naturally Aspirated. And be damn near bulletproof.


    I wish I had kids, that way I could break into their college fund and drop one of those monsters in the ole Z28. Nothing like American family values, eh?

  16. #36
    Member DocEwww's Avatar
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    Its all about the money and what type of application its for.

    427 LS2 solid roller w/ LS7 or ETP 265cc heads with a real intake manifold = win

  17. #37
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    Quote Originally Posted by Roastem
    If you are gonna spend that kind of money, go with the 454. That is how Chevy is going to outdo the current Z06 LS7, they are gonna punch it out to 454 cubes for the 2008 model year. A 454 LS motor with some WarHawk P&P Heads and a big cam is gonna land you in the 600 to 700 HP range, Naturally Aspirated. And be damn near bulletproof.
    I think I'd probably end up going w/ a Warhawk block, 454 cubes, and keep it naturally aspirated. I think between 600HP-700HP should do the trick for me.

  18. #38
    427 all the way

  19. #39
    Evr sena bdgr killa snak? Roastem's Avatar
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    Quote Originally Posted by bad99ta
    I think I'd probably end up going w/ a Warhawk block, 454 cubes, and keep it naturally aspirated. I think between 600HP-700HP should do the trick for me.
    Nah, you will get used to spinning at 100, so you will throw a 15 lb Procharger on it so you will get sideways at 140 in FOURTH.

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    402 and turbo it... 427 thin walls

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