I've been out for quite awhile because of back surgery. The good news is that I've done a pile of research on "how-to" design what I want to do. I just don't have a goal whp figure to take my theoretical numbers into the real world numbers I need. I searched for "pump gas" and got zero results. Most of the examples of 1/4 mile times were of stripped hatches.

My goal is high 12's with a turbo Z6 in a fully dressed sedan. I'd like to do it on pump gas, but I'm not sure if I can achieve the whp I need... mostly because I don't know what whp I *do* need. With the engine characteristics of the Z6, what is a ballpark whp number that I should be designing for? Is using pump gas a realistic goal for that whp level? I know anything is possible, but it will be built in my garage, not in the pages of a magazine.

I'm confident I can choose the correct parts for the engine & tranny for my needs. So I don't need feedback on rods/turbo/lsd/tuning selection. I do need feedback on what "miscellaneous" upgrades would be necessary though. Any experience on breaking axles and such at my build level would be appreciated.

Thanks guys. If I need to be more precise on anything, let me know what you need to help.

 

I have a full weight sedan also..and a d-series motor lol...i run a t3/t4 57 trim at 15psi on slicks (22's) with a z6 tranny with obx lsd. that being said at 15psi ive ran 12.8-12.9...on 20psi i ran 12.4-5's on 23psi i ran 11.9 and on 25psi i ran 11.5

hope that helps ya...all this and full weight...i run 93 pump gas up to 20psi and then its race gas after that...

 

^ very good info for the OP considering you have the same setups going on... but how much horsepower are you making at 15psi & 20psi?

that would probably help him a little more.

 

i dont know thats why i didnt say...if i had to guestamate i would say 280-300 at 15psi and prolly 340-360 at 20psi...thats just judging from my trap speeds on those runs...

 

That helps quite a bit. I checked out fast2camcivs' post about going over 400 hp and found some good info in peoples sigs/posts.

** Sedan - 11.5@124 - 405 whp 315 ftlbs
** Coupe w/stock D16Z6 - 230whp/208wtq - 12.6 @ 107 mph
** Unknown chassis - 15lbs of boost ~355whp - 12.3 @ 118 mph (2.0 60')
** Hatch - 250 whp and 251 wtq @ 10 psi 12.8 @108

I had "350" in my head and judging from the numbers above, that should be plenty adequate. I'll aim for 350.

Thanks guys. I'm off to crunch numbers.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CrazyCooter &raquo;</TD></TR><TR><TD CLASS="quote">That helps quite a bit. I checked out fast2camcivs' post about going over 400 hp and found some good info in peoples sigs/posts.

** Sedan - 11.5@124 - 405 whp 315 ftlbs
** Coupe w/stock D16Z6 - 230whp/208wtq - 12.6 @ 107 mph
** Unknown chassis - 15lbs of boost ~355whp - 12.3 @ 118 mph (2.0 60')
** Hatch - 250 whp and 251 wtq @ 10 psi 12.8 @108

I had "350" in my head and judging from the numbers above, that should be plenty adequate. I'll aim for 350.

Thanks guys. I'm off to crunch numbers.</TD></TR></TABLE>
yea we deff have the disadvantage of lugging around a couple extra doors lol!
ive weighed my car and it weighs 2540 without me in it....im just over 2700lbs race weight...so consider that a hatch is around 500lbs lighter (your average gutted street raceer style hatch lol) so its going to take you a good 50-60 more hp to do what those guys do just cause were full weight and gangsta like that lol!
anywyas 350 will be plenty for ya good luck!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fast2camciv &raquo;</TD></TR><TR><TD CLASS="quote">
yea we deff have the disadvantage of lugging around a couple extra doors lol!
ive weighed my car and it weighs 2540 without me in it....im just over 2700lbs race weight...so consider that a hatch is around 500lbs lighter (your average gutted street raceer style hatch lol) so its going to take you a good 50-60 more hp to do what those guys do just cause were full weight and gangsta like that lol!
anywyas 350 will be plenty for ya good luck! </TD></TR></TABLE>


im just about 2700 with me in it at the track. my best run was a 12.54@115.5mph. i should be making just about 325-335whp