Back from the dyno---466RWHP
Thread Starter
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Back from the dyno---466RWHP
What a difference a functioning ignition and a tune make! After 3+ hours on the dyno and 15+ pulls we stopped at 466 RWHP and 431 RWTQ. I was MORE than happy with the results! The car still has some more in it but I didn't want to rev it over 7K as I just replaced some of the main bearing a couple hundred miles ago and I was being paranoid... 
Here's a scan of the printout...
It's a 383 LT4. My exhaust it REALLY choking up top right now too...with a better flowing exhaust and a set of shaft rockers I can probably get another 20+HP out of it...but considering this thing took me 10+ months to finish I think i am going to take a break for now!!
Here's a scan of the printout...
It's a 383 LT4. My exhaust it REALLY choking up top right now too...with a better flowing exhaust and a set of shaft rockers I can probably get another 20+HP out of it...but considering this thing took me 10+ months to finish I think i am going to take a break for now!!
Thread Starter
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Originally Posted by Gary K
Awesome. What heads and cam are you running?
242/252 duration @.050 .55x/.56x lift on a 110 LSA
Still a hydrolic roller cam...the great thing is this car is just as easy to drive as it was when I just had heads/cam done to it. Very tame, until you hit the throttle!
I've got to get rid of my 4.10 gears, 1st and 2nd are pretty much useless unless you baby them and it just spins up too quickly to be useable. I'm thinking of going to a 3.73 rearend pretty soon.
Instructor
Joined: Sep 2005
Posts: 156
Likes: 4
From: Plainfield IL
that's really screaming, especially on a mustang dyno, great job.
Is that an all motor pass?
I would love to see a mod list too?
What size injectors/throttle body you running.
What comp. is it, and how much total timing is in it?
That should for sure run a new z06 off the road.
Is that an all motor pass?
I would love to see a mod list too?
What size injectors/throttle body you running.
What comp. is it, and how much total timing is in it?
That should for sure run a new z06 off the road.
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Thread Starter
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Originally Posted by eherbst
that's really screaming, especially on a mustang dyno, great job.
Is that an all motor pass?
I would love to see a mod list too?
What size injectors/throttle body you running.
What comp. is it, and how much total timing is in it?
That should for sure run a new z06 off the road.
Is that an all motor pass?
I would love to see a mod list too?
What size injectors/throttle body you running.
What comp. is it, and how much total timing is in it?
That should for sure run a new z06 off the road.
42lb SVO injectors
TPIS 58mm billet TB
Timing right now in the upper RPM ranges at WOT is set at about 35*. It was initially set at 40* but we started getting some knock on the dyno. I called the guy who prted the heads and he wanted a max of 36* timing...we put in 35-36* and the knock was gone. And this is on crappy AZ 91 octane gas.
The owner of the dyno shop came through when we were making some runs and he was having a blast! The car sounds absolutely wicked running at 6900.
Mod list...well let me see;
All forged 383 LT4
Heavily ported LT4 heads and intake
Cam specs listed eariler
TPIS long tube headers (changed to EM headers soon I hope)
LTCC coil kit
Mez electric water pump
42 lb SVO injectors
58mm billet throttle body
Billet MAF ends
The short-block and heads were put together by Gary Grimes out in Georgia, he does a lot of powertrain development for GM and has one of he largest engine dyno shops in the country. He's not cheap, but he's one of the best. If you want any more specifics just let me know!
Thread Starter
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Originally Posted by zelement
Got any clips of the car at idle with that cam?
I'll bet it sounds killer!
Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
Originally Posted by Zix
.......I've got to get rid of my 4.10 gears, 1st and 2nd are pretty much useless unless you baby them and it just spins up too quickly to be useable. ..........
But with 7000rpm of capability why not think about tires that will hook??
If you are really spinning in 2nd gear, and I am sure you are, with that much power going to 3.73 isn't going to eliminate traction problems especially in 1st gear....then again you might need the 3.73's at the top end going thru the traps
Pleasant problem.......too much power....enjoy..
Thread Starter
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Originally Posted by LT4BUD
Great numbers........
But with 7000rpm of capability why not think about tires that will hook??
If you are really spinning in 2nd gear, and I am sure you are, with that much power going to 3.73 isn't going to eliminate traction problems especially in 1st gear....then again you might need the 3.73's at the top end going thru the traps
Pleasant problem.......too much power....enjoy..
But with 7000rpm of capability why not think about tires that will hook??
If you are really spinning in 2nd gear, and I am sure you are, with that much power going to 3.73 isn't going to eliminate traction problems especially in 1st gear....then again you might need the 3.73's at the top end going thru the traps
Pleasant problem.......too much power....enjoy..
