+- Madison Motorsports (https://forum.mmsports.org)
+-- Forum: Madison Motorsports (https://forum.mmsports.org/forumdisplay.php?fid=3)
+--- Forum: Lounge (https://forum.mmsports.org/forumdisplay.php?fid=6)
+--- Thread: So... (/showthread.php?tid=4404)
So... - white_2kgt - 06-24-2006
As most of you know, I had a 4.6L 2v GT engine in my car to start with, the stock motor. In November of 02 I had it dynoed, not much really done to the engine, a few bolt ons here and there, this was my dyno,
![[Image: DynoPrintout.jpg]](http://www.2kgt.com/images/DynoDay_11-23-02/DynoPrintout.jpg)
Decent torque, oh and that was though an automagic trans.
At VIR in Feb of 05 I blew that engine up, hole right through the piston, anyway, replaced that with a 4.6l 4v from an 01 Cobra, never had it dynoed, my lap times were lower at Summit and VIR than with the 2v, but I had changed the entire front suspension while I had the motor out and I had recently put in a TKO 5speed.
Well, first of this month I had the Cobra engine dynoed at Carlisle, in front of about 300 people, I was NOT impressed.
![[Image: IMG_0135.jpg]](http://www.2kgt.com/images/CarlisleAllFordNationals_2006-06-03/IMG_0135.jpg)
![[Image: AxceleratedDyno_web.jpg]](http://www.2kgt.com/albums/00mustang/AxceleratedDyno_web.jpg)
Something's f'ed up there!!! The data log showed my timing was WAY low as well.
We goto watkins glen anyway, Pete and I run together, you all saw the videos, I couldn't pull on him, we were pretty much dead even on the straights.
I get back home and pull the spark plugs, #7 is COVERED in oil, oh great, wonderful, this is great timing, 1 month from Hyperfest and I will probably have to rebuild my engine. I call up a buddy of mine that builds 4v drag engines to come over and look at it, while he is on his way over I start pulling the top end of the engine apart (yes, I took it out of the car, can't get the heads off w/ it in the car), well what do I notice? The #7 injector that is directly under the throttle body is UNPLUGGED! OMG. WTF! So I leave the heads on and my buddy gets there, we have a good laugh and I'm still flabbergasted, it has been unplugged ever since I put the motor in. I already had the cam covers off so he degrees my cams for me and resets the timing (left bank was a few degrees advanced). He checks the #7 piston out w/ a borescope then we do a leak down test, holds great, no problems, phew.
So, I put the motor back in the car (total elapsed time, 5 days). I finally got the exhaust redone and the car back down on wheels and arranged to have another dyno done this morning early, here's the results,
![[Image: AndersonDyno_web.jpg]](http://www.2kgt.com/albums/00mustang/AndersonDyno_web.jpg)
hock: +50hp +50 tqThis motherfucker is going to be a handful at Hyperfest 8)
- ScottyB - 06-24-2006
haha, rock on. what's better than finding 20 bucks in your pocket by accident? finding 50 horsepower by accident!
- JohnC - 06-24-2006
Is the idle noticably different now? I remember having lots of injector/EFI harness problems with the Z, and if that thing was down a cylinder, it was immediately apparent.
Anyhow - congrats on the simple fix
- white_2kgt - 06-24-2006
JohnC Wrote:Is the idle noticably different now? I remember having lots of injector/EFI harness problems with the Z, and if that thing was down a cylinder, it was immediately apparent.
Anyhow - congrats on the simple fix
Yea, but honslty, it wasn't bad before, just reminded me of a cammed big block. The idle is much smoother now. I pulled an injector wire while it was running just to get a feel for how much different the idle is.
- HAULN-SS - 06-24-2006
haha..awesome
- John - 06-24-2006
All different dynos, so it's really difficult to compare. Regardless, 8 cylinders is always better than 7...
- Mike - 06-24-2006
you dummy! hahaha i can't wait to hear and see the beast now!
- white_2kgt - 06-24-2006
Mike Wrote:you dummy! hahaha i can't wait to hear and see the beast now!
I have a full 2.5" exhaust now too, I use to have about 18" of 2.25" pipe left over from the stock setup, w/ all 8 cylinders and the reworked exhaust, is sounds SOOO much better.
- Mike - 06-25-2006
ohhh. this is an advantage of less cylidner btw... when you only have 3/4 it is obvious something is wrong
- ViPER1313 - 06-25-2006
OBD1 cylinder balance check ftw!
- Sijray21 - 06-25-2006
wow, 50whp/50lbs*ft from 1 cylinder
hock:incredible, lol - glad the fix was relatively easy!
- white_2kgt - 06-25-2006
Sijray21 Wrote:wow, 50whp/50lbs*ft from 1 cylinder
incredible, lol - glad the fix was relatively easy!
Well you have to remember it was also robbing power from the other cylinders b/c they had to work to move it up and down, I was expecting to see about 40hp from the fix, boy was I surprised!
- Chris - 06-25-2006
thats like winning the lotto! f'in sweet!
- Evan - 06-25-2006
what is the weight of your car? Are you close to the 9:1 ratio?
do you plan on trying to get the car down to 2700 lbs, or just pump up the hp?
- white_2kgt - 06-26-2006
Evan Wrote:what is the weight of your car? Are you close to the 9:1 ratio?
do you plan on trying to get the car down to 2700 lbs, or just pump up the hp?
There's no way I could afford the carbon fiber required to get my car down to that weight. I'll probably throw some cams in the motor and give it a decent tune, that should put me at the proper hp for my weight and give me some room to bump up the torque as well.