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454 LSX BUILD HP Estimates

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Old Oct 14, 2007 | 08:33 PM
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Originally Posted by OKcruising
Me thinks you'll fry your '65E in very very short order.

How bad is it limited for 1 7/8ths? It's been a while since I've gone under the hood of a Silvy (though I'm tossing around a SSS build up similar to yours or gone boosted)


Yes the 65e is the weakpoint in this setup, but there are a handfull of guys that are making comperable numbers compared to what I will be making and there tranny's have held up quite well. They all use the same builder that I do as well. As of right now, the biggest header available for the ss awd trucks is a 1 3/4".....I will probably be going with a custom 1 7/8 stepped to 2" if kooks will ever get back to me.
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Old Oct 14, 2007 | 08:37 PM
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Originally Posted by Old SStroker
Even good 427 inch LS7 engines get stronger with 1-7/8 primaries. How much power are you willing to leave on the table with 1-3/4's? 30? 50? more?
0 if possible.....I have been getting mixed reviews on wether or not larger headers would actually net me more power....im beginning to side with the bigger primaries though.
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Old Oct 14, 2007 | 11:49 PM
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Originally Posted by adams2003
0 if possible.....I have been getting mixed reviews on wether or not larger headers would actually net me more power....im beginning to side with the bigger primaries though.

There's always been controversy wheteher 1 7/8's gives you an advantage over then 1 3/4. When I went big cubes, I changed to 1 7/8. Seems like all the 530+ rwhp strokers all have them, so that's good enough for me.
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Old Oct 18, 2007 | 04:15 PM
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just curious but what is the going rate on building a 427 or 454?
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Old Oct 18, 2007 | 06:05 PM
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Originally Posted by Jay Vicious
just curious but what is the going rate on building a 427 or 454?
Personally 5 fig nutons and still munching....
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Old Oct 18, 2007 | 10:17 PM
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Originally Posted by Jay Vicious
just curious but what is the going rate on building a 427 or 454?
There are a ton of factors that can change the price dramatically.....personally Ill be in for about 10k when its all said and done.
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Old Oct 18, 2007 | 10:50 PM
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Originally Posted by adams2003
0 if possible.....I have been getting mixed reviews on wether or not larger headers would actually net me more power....im beginning to side with the bigger primaries though.
If kooks ever gets back to ya let em know there is another one awaiting bigger tubes.

Hey we can start a "Group Purchase".

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Old Oct 19, 2007 | 09:28 AM
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Originally Posted by adams2003
There are a ton of factors that can change the price dramatically.....personally Ill be in for about 10k when its all said and done.

How are you coming up with that figure for a longblock? or is this just a shortblock?
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Old Oct 21, 2007 | 07:04 PM
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Originally Posted by jermzz
How are you coming up with that figure for a longblock? or is this just a shortblock?
-$6,500 for the shortblock
-$2,500 for exhaust ported fullly assembled LS7 heads
-$600 ported ls7 manifold
-$400 for ls7 rockers with harland sharpe upgrade
-miscalaneous stuff not added up yet
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Old Oct 21, 2007 | 07:28 PM
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Originally Posted by adams2003
-$6,500 for the shortblock
-$2,500 for exhaust ported fullly assembled LS7 heads
-$600 ported ls7 manifold
-$400 for ls7 rockers with harland sharpe upgrade
-miscalaneous stuff not added up yet
I see. You havnt accounted for fuel rails, injectors, TB blah blah yet. Makes sense.
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Old Oct 22, 2007 | 09:48 AM
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Originally Posted by jermzz
I see. You havnt accounted for fuel rails, injectors, TB blah blah yet. Makes sense.
Yes, you could probably add another 1k to that for miscalaneous stuff.
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Old Oct 22, 2007 | 11:52 AM
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Originally Posted by adams2003
Yes, you could probably add another 1k to that for miscalaneous stuff.
TB=$400
Injectors=$400
Fuel rails=$200 (if aftermarket)
Cam=$400
Timing chain=$100
Head gaskets, head studs, blah.blah.blah.

The ball of wax gets very large very,very quickly....
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Old Oct 22, 2007 | 01:29 PM
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Originally Posted by Stang's Bane
TB=$400
Injectors=$400
Fuel rails=$200 (if aftermarket)
Cam=$400
Timing chain=$100
Head gaskets, head studs, blah.blah.blah.

The ball of wax gets very large very,very quickly....
Dont forget about fuel. a 340 intank is not going to be sufficient much longer.
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Old Oct 22, 2007 | 01:41 PM
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Originally Posted by Stang's Bane
TB=$400
Injectors=$400
Fuel rails=$200 (if aftermarket)
Cam=$400
Timing chain=$100
Head gaskets, head studs, blah.blah.blah.

The ball of wax gets very large very,very quickly....
Had the injectors from my previous setup, cam is part of the shortblock as well as the timing chain.
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Old Oct 22, 2007 | 01:57 PM
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Originally Posted by jermzz
Dont forget about fuel. a 340 intank is not going to be sufficient much longer.
Already had a walbro in there as well.
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Old Oct 22, 2007 | 07:41 PM
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moneys gettin sucked like a hoover
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Old Oct 23, 2007 | 02:34 AM
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Originally Posted by adams2003
Already had a walbro in there as well.
Yeah but you might need two!
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