Notices
Dynamometer Results & Comparisons Dyno Records | Dyno Discussion | Dyno Wars

Ol 383 back on the rollers.

 
Old 11-08-2018, 07:22 PM
  #21  
10 Second Club
 
big hammer's Avatar
 
Join Date: May 2009
Location: over dere
Posts: 3,191
Default

Originally Posted by SoFla01SSLookinstok View Post


I can agree with this. Past around 6500 rpm though. It's ok you can post your opinion. These heads are only 215cc but are great heads. The best heads? No of coarse not. We've seen tests against the MSD on cath heads. The fast manifolds make better tq/hp up to about 6500rpm. Also the highest I spin is about 7200 & that's only racing or dyno. With the shift drop about 2k rpm I'm just above 5k on an up shift. It would be cool to see the average hp numbers between my manifold & a msd between these rpm. Hams just think if I put some llsr big cam in it with a msd & spun it to 7500+. I bet it would make a nice amount more power with same heads. Ls3 heads would make more power up top but I'm just not a fan. Try to remember this is a skreet car.

No hams a 5.3 will not make this power in this rpm range. Now a 8-9k rpm screamer. Sure. The piston is a nice bit smaller. Hey I could be wrong. I also would like to see a 5.3 making similar power.
no it wonít make the same power in the same rpm range. Power band would move a lot to the right. A 500 rwhp 5.3 would have to spin a lot higher as itíll make less tq. But hp could be similar

big hammer is offline  
Old 11-08-2018, 07:51 PM
  #22  
10 Second Club
 
big hammer's Avatar
 
Join Date: May 2009
Location: over dere
Posts: 3,191
Default

Your tq is decent. Indicative of a decent overall package. But your TQ is also indicative of hp potential. It’s really not hard at all to make 100 rwhp more than your rwtq. Right now I’m at 130 more. Darth HCI ls1 was 100 more and he drove it everywhere. He made around 540/440. There’s potential for even more rwhp there either more rpm but not sure how the Stock bottom would like it

so you being at 460 rwtq well you can see where your hp potential lies with simple math. I think being in that 80-100 more rwhp range than tq is about max and to keep real drivability. Tbh you
could get near 600 rwhp but that’s not really within the realm
ofnthe purpose of your car
big hammer is offline  
Old 11-09-2018, 02:14 PM
  #23  
11 Second Club
Thread Starter
 
SoFla01SSLookinstok's Avatar
 
Join Date: Mar 2012
Location: South Florida
Posts: 1,480
Default

This one guy with a race car. He makes 600+ rwhp.
SoFla01SSLookinstok is offline  
Old 11-09-2018, 04:17 PM
  #24  
TECH Senior Member
iTrader: (26)
 
kinglt-1's Avatar
 
Join Date: Jul 2005
Location: Ft. Wayne, IN
Posts: 5,559
Default

Originally Posted by big hammer View Post
Your tq is decent. Indicative of a decent overall package. But your TQ is also indicative of hp potential. It’s really not hard at all to make 100 rwhp more than your rwtq. Right now I’m at 130 more. Darth HCI ls1 was 100 more and he drove it everywhere. He made around 540/440. There’s potential for even more rwhp there either more rpm but not sure how the Stock bottom would like it

so you being at 460 rwtq well you can see where your hp potential lies with simple math. I think being in that 80-100 more rwhp range than tq is about max and to keep real drivability. Tbh you
could get near 600 rwhp but that’s not really within the realm
ofnthe purpose of your car

How many miles have you put on your car since the 388?
kinglt-1 is offline  
Old 11-09-2018, 10:02 PM
  #25  
10 Second Club
 
big hammer's Avatar
 
Join Date: May 2009
Location: over dere
Posts: 3,191
Default

Originally Posted by kinglt-1 View Post
How many miles have you put on your car since the 388?
i have no clue. More than my firehawk
big hammer is offline  
Old 11-10-2018, 09:04 AM
  #26  
TECH Senior Member
iTrader: (3)
 
99 Black Bird T/A's Avatar
 
Join Date: Nov 2001
Posts: 6,152
Default

So Florida SS, I think the numbers look good. Nice set up.

Originally Posted by big hammer View Post
Your tq is decent. Indicative of a decent overall package. But your TQ is also indicative of hp potential. Itís really not hard at all to make 100 rwhp more than your rwtq. Right now Iím at 130 more. Darth HCI ls1 was 100 more and he drove it everywhere. He made around 540/440. Thereís potential for even more rwhp there either more rpm but not sure how the Stock bottom would like it

so you being at 460 rwtq well you can see where your hp potential lies with simple math. I think being in that 80-100 more rwhp range than tq is about max and to keep real drivability. Tbh you
could get near 600 rwhp but thatís not really within the realm
ofnthe purpose of your car
Hammer, I think that's very well worded. When folks have a custom cam spec'd that's a great way to describe what they want out of the top end package with the goal of higher rpm hp.

Follow up question, say a ported 706 cathedral 5.3 cylinder head on a 5.7 flows enough air to too make 400 whp & 400 wtq with a 224 sized cam with the stock Ls6 intake. With a MSD or Fast 102 intake what sort of cam & lifter set do you think will get 500 whp & 400 wtq out of the engine?

Let's limit the rpm to 8,000 for the stock bottom end. LPE spun several stock bottoms to 8,000 rpm and they lived for a while. Let's assume the 5.3 heads can flow a max of 270 cfm of air with the MSD or 102 Fast intake.

Last edited by 99 Black Bird T/A; 11-10-2018 at 09:17 AM.
99 Black Bird T/A is online now  
Old 11-10-2018, 12:27 PM
  #27  
11 Second Club
Thread Starter
 
SoFla01SSLookinstok's Avatar
 
Join Date: Mar 2012
Location: South Florida
Posts: 1,480
Default

Originally Posted by 99 Black Bird T/A View Post
So Florida SS, I think the numbers look good. Nice set up.
Thanks! Appreciate it sir.
SoFla01SSLookinstok is offline  
Old 11-15-2018, 05:45 PM
  #28  
11 Second Club
iTrader: (9)
 
handyandy496's Avatar
 
Join Date: Jun 2013
Location: florida
Posts: 663
Default

Originally Posted by SoFla01SSLookinstok View Post
Thanks! Appreciate it sir.
Even stock performance GM wont run those heavy valves. Stock ls3 sings to 6500 6600. and the lite valves can be pushed to 7600 easy with 500lb springs.
handyandy496 is offline  
Old 11-15-2018, 06:37 PM
  #29  
11 Second Club
Thread Starter
 
SoFla01SSLookinstok's Avatar
 
Join Date: Mar 2012
Location: South Florida
Posts: 1,480
Default

Originally Posted by handyandy496 View Post
Even stock performance GM wont run those heavy valves. Stock ls3 sings to 6500 6600. and the lite valves can be pushed to 7600 easy with 500lb springs.
Maybe I should have just put a crate LS3 in this thing. Would've made more friends online lol.
SoFla01SSLookinstok is offline  
Old 11-16-2018, 07:44 AM
  #30  
TECH Enthusiast
iTrader: (1)
 
Chris25's Avatar
 
Join Date: Sep 2013
Location: Clearwater, FL
Posts: 655
Default

Originally Posted by SoFla01SSLookinstok View Post
Maybe I should have just put a crate LS3 in this thing. Would've made more friends online lol.
Knowing this place probably not lol
Chris25 is online now  
Old 11-16-2018, 08:02 AM
  #31  
11 Second Club
Thread Starter
 
SoFla01SSLookinstok's Avatar
 
Join Date: Mar 2012
Location: South Florida
Posts: 1,480
Default

Originally Posted by Chris25 View Post
Knowing this place probably not lol
Lol...
SoFla01SSLookinstok is offline  
Old 11-16-2018, 12:24 PM
  #32  
TECH Enthusiast
 
Join Date: Oct 2014
Posts: 631
Default

I think itís a nice overall package. Iím sure it has good drive ability and excellent power curve for any street car. Have you had any oil consumption issues with the 4Ē crank? Iím debating between a 3.9Ē or a 4Ē for my ls1 which is why Iím asking.
jhshnh is offline  
Old 11-18-2018, 07:35 PM
  #33  
11 Second Club
Thread Starter
 
SoFla01SSLookinstok's Avatar
 
Join Date: Mar 2012
Location: South Florida
Posts: 1,480
Default

Originally Posted by jhshnh View Post
I think it’s a nice overall package. I’m sure it has good drive ability and excellent power curve for any street car. Have you had any oil consumption issues with the 4” crank? I’m debating between a 3.9” or a 4” for my ls1 which is why I’m asking.
Thanks. The dumped exhaust makes it a little rowdy but the motor is pretty tame. Sometimes it smokes a little on start up. Doesn't bother me much. With oil consumption I'd say I will add maybe a quart between 3k mile oil changes. Engine has just over 12k miles on it. Been the same since new.

Last edited by SoFla01SSLookinstok; 11-18-2018 at 07:43 PM.
SoFla01SSLookinstok is offline  
Old 11-18-2018, 07:53 PM
  #34  
10 Second Club
iTrader: (8)
 
HioSSilver's Avatar
 
Join Date: Aug 2002
Location: Winchester, VA
Posts: 5,081
Default

Originally Posted by SoFla01SSLookinstok View Post
Maybe I should have just put a crate LS3 in this thing. Would've made more friends online lol.
with the right combo around it there is no doubt it woulda been faster.
HioSSilver is offline  
Old 11-18-2018, 08:06 PM
  #35  
11 Second Club
Thread Starter
 
SoFla01SSLookinstok's Avatar
 
Join Date: Mar 2012
Location: South Florida
Posts: 1,480
Default

Guess what duhg. Your car could be faster too...
SoFla01SSLookinstok is offline  
Old 11-18-2018, 09:39 PM
  #36  
10 Second Club
iTrader: (8)
 
HioSSilver's Avatar
 
Join Date: Aug 2002
Location: Winchester, VA
Posts: 5,081
Default

Oh mine was faster when i hurt it.
HioSSilver is offline  
Old 11-20-2018, 02:06 PM
  #37  
TECH Senior Member
iTrader: (3)
 
99 Black Bird T/A's Avatar
 
Join Date: Nov 2001
Posts: 6,152
Default

Originally Posted by SoFla01SSLookinstok View Post
Maybe I should have just put a crate LS3 in this thing. Would've made more friends online lol.
Only if the LS3 intake was replaced with a hogged out Fast LSXR 102 intake or MSD intake and ported 102 TB with short /mid runners and a big cam that's not from Comp Cams, tuned & installed by you with software you custom wrote.

Chassis dyno of NA 650 whp minimum to make on line

Last edited by 99 Black Bird T/A; 11-20-2018 at 02:14 PM.
99 Black Bird T/A is online now  
Old 11-20-2018, 07:46 PM
  #38  
10 Second Club
 
big hammer's Avatar
 
Join Date: May 2009
Location: over dere
Posts: 3,191
Default

These are neat. They’re basically mast castings but not cnc’d. I think would be great on a 383

http://www.performance-world.com/Cyl...s-p/63240a.htm
big hammer is offline  
Old 11-21-2018, 08:00 AM
  #39  
"I MAID THEESE"
iTrader: (3)
 
Mavn's Avatar
 
Join Date: Jul 2011
Location: Houston
Posts: 1,554
Default

Originally Posted by big hammer View Post
These are neat. Theyíre basically mast castings but not cncíd. I think would be great on a 383

http://www.performance-world.com/Cyl...s-p/63240a.htm
HMMMM those look interesting
Mavn is offline  
Old 11-21-2018, 08:12 AM
  #40  
TECH Enthusiast
iTrader: (1)
 
Chris25's Avatar
 
Join Date: Sep 2013
Location: Clearwater, FL
Posts: 655
Default

Originally Posted by big hammer View Post
These are neat. Theyíre basically mast castings but not cncíd. I think would be great on a 383

http://www.performance-world.com/Cyl...s-p/63240a.htm
Thats not a bad price at all be interesting to see how they perform.
Chris25 is online now  

Thread Tools
Search this Thread

About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: