78supersport

iTrader: (4)

That run Looked good. Sounds like you need to launch at a high rpm on the two step. It going to be a dog out of the hole until you start spraying it. Just the way that cam is. Still has a lot left in it.

superbean

Bingo!

For what its worth, when I put mine on the dyno it made peak power at 27 degrees.. Id say you have a little bit better flowing exhaust than I do so that makes sense. Mine is also at 12.8 - so I see some consistency. Car made 321/312 through a 3600 unlocked loose converter at 5900 rpm.. with your cam you have about another 1000 rpm of useable power to pull that curve up, not to mention a lot more top end. Id imagine even through your converter youre in the neighborhood of 340/350 whp!

have you considered some 799/243 heads to flow with that cam?

MustangLS

iTrader: (5)

The previous run where I went 11.40 I left on the brake as high as the converter would allow, about 4560 RPM according to the datalog. The 11.41 pass I set the 2 step to 4500 so that's about it for the NA set up. If I had the converter tightened up I agree there is more left in it. However before I make any changes I need to see how it works on the spray. We'll see this weekend.

MustangLS

iTrader: (5)

Sounds like a pretty good estimate. One of these days I'll get it on the dyno to see what it puts down to satisfy my curiosity.

I'd like to upgrade the heads but still deciding what route I'll go long term. If I run into a good deal on some 799/243's I'd pick them up. I've also thought about picking up a 6.0 shortblock and putting ls3 heads on top of it. I'm not sure if it will happen this summer but I'd like to put a single turbo on the car. Because of that I've thought about just sticking to the 5.3 as I know I can go plenty fast on that engine with a good set of heads. If I was keeping it NA/Nitrous I'd probably be looking at the 6.0 more. For now I'll see what the 5.3 can do with the nitrous.

Lawhead

iTrader: (14)

You two running the TH400 and Th350 they fit right in there with no firewall issues seems a bit small in there lol

MustangLS

iTrader: (5)

Mine fit without any massaging of the firewall or floor. The engine does sit back pretty far that's about the only tricky thing when dropping the engine in with the trans attached.

Lawhead

iTrader: (14)

Wonder if there is much difference where the motor sits with the AJE vs the UMR

MustangLS

iTrader: (5)

From the pictures I've seen it looks to be the same.

MustangLS

iTrader: (5)

Nitrous install done.

TxFireman1972

iTrader: (8)

Sweet!!!!

jaywill

iTrader: (5)

Looks good !

SCott5

iTrader: (40)

Thats awesome setup. I love sn95s and have been wanting to do this but afraid of taking the plunge. The only thing that worries me is the wiring. The holley looks clean. Was it really a plug and play like the website says

MustangLS

iTrader: (5)

The Holley is pretty easy. You have a power/ground to the battery, fuel pump signal wire, 12v switched inside the car, ground to the back of the engine, constant power under the hood, everything else is plugging into sensors. If you use Holley gauges it's a single wire hook up also an output for a tach. I also have inputs for my transbrake, nitrous arm, factory fuel level sender and trans temp.

I was hoping to have nitrous times tonight but the only rain in the last month happened to come today at our track rental. I made one run on motor and was in the burnout box when it started raining and they called it.

MustangLS

iTrader: (5)

Even though no nitrous times I did get this nice shot of the car leaving. Pretty deceptive as it levels out right after the front end goes up.

vnmous97

awesome build i am doing the same swap just going the street car route
i swapped the rear for the 03 cobra IRS used an iron block 6.0 bored and stroked with LS3 heads ... i just hope i can make as good 1/4 mile time as you your car is very light .. mine is a real cobra with full interior so going to be a bit heavier ... youris very clean i wish i had gutted my dash im probably gonna swap to the 03 style dash i like the black and aluminum !

vnmous97

whats you ground clearance like .. dynatech headers hang pretty low

MustangLS

iTrader: (5)

It sits about as low as my oil pan. Haven't had any issues yet even pulling into a few steep driveways.

You should be able to run pretty good with that combo. Even with the weight difference you should be making a good 60-70RWHP more than I do to offset that weight.

MustangLS

iTrader: (5)

Took it back out to the track tonight to work through the nitrous set up and get used to the Holley progressive controller. Took about 3 hits in 2nd gear to work through it all. Made a 4th pass off the line but ran the bottle low and 5th run of the night resulted in this.



60 foot is pretty weak but a big part of that is the nitrous trigger is by RPM so I'm launching at 4k and the nitrous triggers at 4200 and the delay really hurts me down low. I tried 150 shot and bumping the 2 step higher but it was even worse as the converter stalls to 4400 on motor so it lugged down before it hit the nitrous trigger at 4600 and then in the top of second the trans flared to nearly 7k. That pass was 9 mins after the 10.58 pass so trans might have been hot or I hurt something. I'll go through everything this weekend and possibly pull the trans. It owes me nothing I couldn't be happier with it.

SCott5

iTrader: (40)

Are you progressing at all or hitting it all at once?

Thanks for the info on the Holley, it looks like last night with a purchase I will be taking this leap for sure. I am going to basically go the same route as you (street driven racecar)

MustangLS

iTrader: (5)

With the 100 shot just straight out of the hole. Well actually I launch at 4k and it turns on at 4200. I'm going to rewiring the input so it triggers soon as I release the transbrake. I will try the 150 shot the same way and anything beyond that I'll ramp it in.

No problem glad I could help.