Is upgrading from shorties to Long tubes worth the $$ ?
Registered User
Joined: May 2002
Posts: 1,025
From: Saskatchewan, Canada
Originally posted by Haskin Z28
im only curious about one thing through all this rubbish, stock motored here and plan to stay it for a while, prices and what not aside which would benfit me more, hooker LTs or macs, i dont care about how low they hang, looks, price etc., i just want to hear about the performance
im only curious about one thing through all this rubbish, stock motored here and plan to stay it for a while, prices and what not aside which would benfit me more, hooker LTs or macs, i dont care about how low they hang, looks, price etc., i just want to hear about the performance
Registered User
Joined: Mar 2002
Posts: 3,634
From: Newark, Delaware
Originally posted by hsyr
Yes I would highly recommend LT's over mids. That way if you ever do decide to do like a H&C combo, you have the best headers to support it.
Yes I would highly recommend LT's over mids. That way if you ever do decide to do like a H&C combo, you have the best headers to support it.
Frank
Registered User
Joined: Mar 2002
Posts: 3,634
From: Newark, Delaware
Ok...After 8 pages of replies on this, one thing is very apparant. It's turned into an "opinion" post, instead of a "fact" post.
Who cares if your car FEELS better after doing LT's?
One thing is a common denominator...Those who have LTs will tell you that you won't run quick, or make HP without them (or atleast not as much). Those of us with shorties/mids will tell you you can do both.
Let's start over with some FACTS! If you have LT's, mids, or shorties post your ET's and/or HP numbers. Please include some other stats on the car so we're comparing apples to apples.
I'll go first...All the stats and times are in my sig.
Fastbird93 has also proven to make 375 RWHP with shorties. With some pretty impressive torque numbers to back it up.
So...Now, those with longtubes, PROVE to everyone that they're better! Also tell us how you get your cars through emissions?...I've still got AIR tubes and an EGR hooked up to my MACs. We all already know the price difference. Not only for the LT's, but you'll also need a new Y-pipe. My MACs cost me $389 with a Y-pipe.
Frank
Who cares if your car FEELS better after doing LT's?
One thing is a common denominator...Those who have LTs will tell you that you won't run quick, or make HP without them (or atleast not as much). Those of us with shorties/mids will tell you you can do both.
Let's start over with some FACTS! If you have LT's, mids, or shorties post your ET's and/or HP numbers. Please include some other stats on the car so we're comparing apples to apples.
I'll go first...All the stats and times are in my sig.
Fastbird93 has also proven to make 375 RWHP with shorties. With some pretty impressive torque numbers to back it up.
So...Now, those with longtubes, PROVE to everyone that they're better! Also tell us how you get your cars through emissions?...I've still got AIR tubes and an EGR hooked up to my MACs. We all already know the price difference. Not only for the LT's, but you'll also need a new Y-pipe. My MACs cost me $389 with a Y-pipe.
Frank
Registered User
Joined: Mar 2002
Posts: 2,743
From: Baton Rouge, LA, USA
Originally posted by engineermike
- Thunder Racing did a shorty versus LT dyno test on a 350 LT1 with ported LT4 heads and CC306 cam. I don't remember the exact numbers, but it picked up around 30 - 35 ft-lb low-end torque, but only about 5 - 10 rwhp. If you want the exact numbers, call Thunder, ask for David, and ask him about Hoffpauer's car (pronounced Hof-power). The shorties were 1 5/8". Perhaps the gains would have been less if he had 1 3/4" shorties.
Mike
- Thunder Racing did a shorty versus LT dyno test on a 350 LT1 with ported LT4 heads and CC306 cam. I don't remember the exact numbers, but it picked up around 30 - 35 ft-lb low-end torque, but only about 5 - 10 rwhp. If you want the exact numbers, call Thunder, ask for David, and ask him about Hoffpauer's car (pronounced Hof-power). The shorties were 1 5/8". Perhaps the gains would have been less if he had 1 3/4" shorties.
Mike
Registered User
Joined: Mar 2002
Posts: 2,743
From: Baton Rouge, LA, USA
Originally posted by EDS Z28
I made 480 rwhp with edelbrock shorties, cat converter, stock midpipe and flowmaster muffler. I knew that there was more power to be had due to the fact I was using only 1 cat converter and a pretty restictive y-pipe.
After changing the entire exhaust system out to flp longtubes, 2 cat converters, custom single 3" exhaust and dual magnaflow mufflers (strait thru) my engine made 525 rwhp and gained torque everywhere above 3500 rpm. I was impressed with the new exhaust, but it wasn't cheap.
I made 480 rwhp with edelbrock shorties, cat converter, stock midpipe and flowmaster muffler. I knew that there was more power to be had due to the fact I was using only 1 cat converter and a pretty restictive y-pipe.
After changing the entire exhaust system out to flp longtubes, 2 cat converters, custom single 3" exhaust and dual magnaflow mufflers (strait thru) my engine made 525 rwhp and gained torque everywhere above 3500 rpm. I was impressed with the new exhaust, but it wasn't cheap.
Registered User
Joined: Feb 2003
Posts: 1,853
From: Christiansburg, VA
i trapped 115.38mph, with a raceweight of 3540lbs.
ported heads-xe224/230-rksport headers (mids 1 3/4")
and the usual bolt ons.
i dynoed 356rwhp/349rwtq with a failing fuel pump and traps speeds of 104-106mph.
i dont have any new dyno # after the fuel pump install, i suspect close to 380rwhp with the trap times. thats not to bad for mids?
im upgrading to jet hot LT because i wanted true duals (sound preference)
will i gain or lose any performance? who knows, i guess we will see
jesse
ported heads-xe224/230-rksport headers (mids 1 3/4")
and the usual bolt ons.
i dynoed 356rwhp/349rwtq with a failing fuel pump and traps speeds of 104-106mph.
i dont have any new dyno # after the fuel pump install, i suspect close to 380rwhp with the trap times. thats not to bad for mids?
im upgrading to jet hot LT because i wanted true duals (sound preference)
will i gain or lose any performance? who knows, i guess we will see
jesse
Registered User
Joined: Mar 2002
Posts: 2,743
From: Baton Rouge, LA, USA
Originally posted by QCKZ28
i trapped 115.38mph, with a raceweight of 3540lbs.
ported heads-xe224/230-rksport headers (mids 1 3/4")
and the usual bolt ons.
i dynoed 356rwhp/349rwtq with a failing fuel pump and traps speeds of 104-106mph.
i dont have any new dyno # after the fuel pump install, i suspect close to 380rwhp with the trap times. thats not to bad for mids?
jesse
i trapped 115.38mph, with a raceweight of 3540lbs.
ported heads-xe224/230-rksport headers (mids 1 3/4")
and the usual bolt ons.
i dynoed 356rwhp/349rwtq with a failing fuel pump and traps speeds of 104-106mph.
i dont have any new dyno # after the fuel pump install, i suspect close to 380rwhp with the trap times. thats not to bad for mids?
jesse
I trapped 114 with 350 rwhp with an old combo.
I would expect 380 rwhp to run closer to 118 mph.
Mike
Registered User
Joined: Feb 2003
Posts: 1,853
From: Christiansburg, VA
Originally posted by engineermike
356 rwhp sounds about right for 115.4 mph.
I trapped 114 with 350 rwhp with an old combo.
I would expect 380 rwhp to run closer to 118 mph.
Mike
356 rwhp sounds about right for 115.4 mph.
I trapped 114 with 350 rwhp with an old combo.
I would expect 380 rwhp to run closer to 118 mph.
Mike
i was trapping 104-106mph with a bad fuel pump, dynoed those numbers, and the DA was 3000
upgraded to a walbro 255, lowered my 60 from 2.5 to 2.0 and trapped 115. but this was at a different track around -1000 DA
would you say that im still in the 360rwhp range?
jesse
Registered User
Joined: Mar 2002
Posts: 4,827
From: Waynesboro, PA
Originally posted by 12SCNDZ
Fastbird93 has also proven to make 375 RWHP with shorties. With some pretty impressive torque numbers to back it up.
Frank
Fastbird93 has also proven to make 375 RWHP with shorties. With some pretty impressive torque numbers to back it up.
Frank
ASM's are Mid-length deisgn.
On another note, I really need to get my rich issue fixed if QckZ28 is trapping 115 with a 356 RWHP rating. I'm dying to see what I get running at.
Registered User
Joined: Feb 2003
Posts: 1,853
From: Christiansburg, VA
Originally posted by Fastbird93
Ahem.......
On another note, I really need to get my rich issue fixed if QckZ28 is trapping 115 with a 356 RWHP rating. I'm dying to see what I get running at.
Ahem.......
On another note, I really need to get my rich issue fixed if QckZ28 is trapping 115 with a 356 RWHP rating. I'm dying to see what I get running at.
jesse
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