Sometimes I wonder... - Page 2 - ZR-1 Net Registry Forums

tpepmeie · 10-21-2017

Quote:

Originally Posted by XfireZ51

Add cams and head porting for another 3-5k, and you have a ~540chp for
roughly 25k total.

Having actually been on the engine dyno with LT5's in this range, 540chp is a bit optimistic if you're talking about reground cams, which top out around 240/.430". You need more camshaft to reach the numbers your quoting.

I know, I know, folks will try to extrapolate back from rwhp, but it doesn't work like you think.

Back to lurking. and building.

5ABI VT · 10-21-2017

I daily a 15 GT. Makes me a Hotshot

5ABI VT · 10-21-2017

I got my GT performance pack for around $22k usd. $5k gets a whipple and over 700 horses. They have a ton of potential and used are becoming cheap.

stock I used my phone app on the same road and tested my GT and it was 1-1.5 mph slower than my zr1 stock. After intake cat back and tune its about 1 mph higher. So basically a Z with a cat back is a good match for a bolt on 5.0. Top end the Z should still pull away.

mike100 · 10-21-2017

A stock coyote car will beat a zr-1 up to about 100 mph. I used to have both and I lost to my own mustang with my friend driving it like he stole it. Once you put headers on an LT5... well, then I hope the mustang is modded too.

but the real secret is the super low first gear in those new stangs along with variable cam phasing which makes that 300 inch engine have high torque at all times. It is good at time/distance acceleration contests right out of the box.

ON EDIT: Mine was a 2012 with 3:55 gears. the older ones weigh about 200 lbs less than the newer ones.

Flyman 27 · 10-21-2017

Quote:

Originally Posted by XfireZ51

If u start out w a decent ZR-1 w an initial investment of 15-18k, do your own top end porting and exhaust, possibly a SM FW, you are now at about 470chp for a total investment of say 21k.
Add cams and head porting for another 3-5k, and you have a ~540chp for
roughly 25k total. And that's staying w stock displacement.
Another alternative would be to go w Pete's Closed Deck mod from the start w that same 15-18k stock car, and now u r in 600chp territory for about
the same total 25k investment. An incredible performance bargain and less than half of a stock Coyote Mustang.

You could have taken him.....

10-21-2017	#12
5ABI VT Join Date: Jun 2013 Location: Toronto Posts: 782	Re: Sometimes I wonder... I daily a 15 GT. Makes me a Hotshot

10-21-2017	#13
5ABI VT Join Date: Jun 2013 Location: Toronto Posts: 782	Re: Sometimes I wonder... I got my GT performance pack for around $22k usd. $5k gets a whipple and over 700 horses. They have a ton of potential and used are becoming cheap. stock I used my phone app on the same road and tested my GT and it was 1-1.5 mph slower than my zr1 stock. After intake cat back and tune its about 1 mph higher. So basically a Z with a cat back is a good match for a bolt on 5.0. Top end the Z should still pull away.

10-21-2017	#14
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,802	Re: Sometimes I wonder... A stock coyote car will beat a zr-1 up to about 100 mph. I used to have both and I lost to my own mustang with my friend driving it like he stole it. Once you put headers on an LT5... well, then I hope the mustang is modded too. but the real secret is the super low first gear in those new stangs along with variable cam phasing which makes that 300 inch engine have high torque at all times. It is good at time/distance acceleration contests right out of the box. ON EDIT: Mine was a 2012 with 3:55 gears. the older ones weigh about 200 lbs less than the newer ones.