LQ4/L92 '73 Nova/'72 front end Build thread
03-08-2012, 04:31 PM
#41
Boring it .030" will net you 6 cubes (.1 litre). If it doesn't need it, stick with a hone. You'll hit 500 hp at the flywheel, but I doubt you'll see 500 at the wheels N/A with that setup. And I'd reconsider the 102 TB with an L76 intake, as well as the cam -- talk to Patrick G instead. Scroll down to the bottom of this post to see rwhp numbers for LS2/L92 setups.
03-10-2012, 11:58 AM
#43
Launching!
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there is a car show the 24th in apache jct at phelps and the trail. my car won't be done i would love to see some of the ones here in az that have been done and helped me with the motivation and answers doing my projects.
there is also a small car show at the aravipa community college in aravipa on the 8th of april. The aravipa one is real small and just helping to raise money and support for a small satellite campus.
thanks
-wade-
edit: jsut got a flyer for the aravaipa show and it is on the 16th. sorry about the confusion. the link is;
http://caccarshow.eventbrite.com
there is also a small car show at the aravipa community college in aravipa on the 8th of april. The aravipa one is real small and just helping to raise money and support for a small satellite campus.
thanks
-wade-
edit: jsut got a flyer for the aravaipa show and it is on the 16th. sorry about the confusion. the link is;
http://caccarshow.eventbrite.com
Last edited by ls68firebird; 03-11-2012 at 02:09 PM.
03-10-2012, 06:06 PM
#45
well, the e/i flow ratio for rectangular-port heads is less than the ideal 80% or so. most cam manufacturers have a greater exhaust duration than intake to make up for the relative lack of flow -- look at that post i linked to, the vast majority are running an e/i duration ratio > 1. The Mega Death cam was made for cathedral ports, so is NOT optimized for rec-port engines.
also, notice nobody's making over 500 to the wheels. you're going to need cubes and/or boost to make 500 whp. Patrick G started a thread in the dyno results section with some LS3/L92 head findings... it's worth reading.
my recommendation? stroke it, and enjoy the fun. I ended up with forged pistons and rods, but kept the 3.622" crankshaft for 370 cubes. Dyno results have shown the rec-ports love more cubes, and I've been kicking myself ever since deciding not to go bigger.
also, notice nobody's making over 500 to the wheels. you're going to need cubes and/or boost to make 500 whp. Patrick G started a thread in the dyno results section with some LS3/L92 head findings... it's worth reading.
my recommendation? stroke it, and enjoy the fun. I ended up with forged pistons and rods, but kept the 3.622" crankshaft for 370 cubes. Dyno results have shown the rec-ports love more cubes, and I've been kicking myself ever since deciding not to go bigger.
03-13-2012, 12:47 PM
#53
valve shrouding is when the edge of a valve is in close proximity to the combustion chamber or cylinder wall. it makes it difficult for the fuel/air charge to enter the chamber. the large 2.165" intake valve makes for a tight squeeze using the smaller 4" bore.
patrick g charges $25 to spec out a cam, which goes toward the $500 total cost to have one ground for your application. that's on par with most aftermarket cams. check that link i provided above for his info.
honestly, it's not difficult to toss a set of L92s on a 4" bore, have a vendor (or pat g) spec out a cam, and hit 400 hp to the wheels. if your goal is 500 though, you're going to have to do a little more
patrick g charges $25 to spec out a cam, which goes toward the $500 total cost to have one ground for your application. that's on par with most aftermarket cams. check that link i provided above for his info.
honestly, it's not difficult to toss a set of L92s on a 4" bore, have a vendor (or pat g) spec out a cam, and hit 400 hp to the wheels. if your goal is 500 though, you're going to have to do a little more
03-13-2012, 09:05 PM
#56
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Well Nitrous is a definite no go because there is no replacement for displacement! 
and why get a custom cam when you can most likely find an aftermarket cam with the same specs? just gotta research and do your homework
and why get a custom cam when you can most likely find an aftermarket cam with the same specs? just gotta research and do your homework 
