z twenty h8

iTrader: (2)

Finally cut a decent 60' and broke 11s! I had the LNC set a 4500 rpms and could go up more. Too many folks at the track last night so I couldn't squeeze in some extra passes. Not bad for an M6 iron block but I think I could rip off some better times.

Them engine is a bit of a dog (467 hp on a mustang dyno) IMO but having a blast pushing it with the 9". What y'all think?

Summary:
T56
Iron block 408ci
L92 heads
L76 intake
BMR K Member, upper & lower A arms
Quick performance 9", 3.5 PST DS
SFCs, LCAs, tunnel mount TA
Weld RTS Wheels with 295/55/15 Hoosier DR2s out back

Build details here: https://ls1tech.com/forums/generatio...ld-thread.html

Tuskyz28

Love the color of your car!!

HCI2000SS

iTrader: (2)

Not bad man. What was the DA and temp? What's your raceweight?

z twenty h8

iTrader: (2)

Not sure about the DA, weather was mid 70s. Haven't been on a scale but I'd guess she's about 3800 race weight.

QwkTrip

iTrader: (23)

You just ran an 11.4 but had never broken 11's before? Wow, that's a HUGE improvement. What is the secret sauce? Tires?

Congrats on the run!

z twenty h8

iTrader: (2)

Yeah, the first run was the 11.7. I turned up the 2 step and got the 11.4 pass.

I made a few passes at an 1/8 mile track last week and hit mid 7s so I figured I'd be close once I got the the 1/4 mile.

I decided to stop worrying about breaking something and go for it.

2011grandsport

You need to turn the 2 step up and go for it. If you don't want to go all out to start with then progress in 500 rpm increments. With your combination you have a lot more in it.

SoFla01SSLookinstok

Good job cutting the 1.5 60'. What gears do you have in the 9"? Also, what rpm are you going through the traps?

z twenty h8

iTrader: (2)

I think I'll start at 5-55k next time out. It's got 3.89 gears. I don't remember the rpm but I'm shifting at 61k and wasn't at the limiter in 4th.

SoFla01SSLookinstok

Cool. I'd say maybe try revving the motor to 6500. See if that helps the mph. Instead of doing several things at once it would be cool to work on your launch, as you're planning, see the gains, then change shift point to see the differences apart from each other. Test & tune baby. Just an idea.

Tuskyz28

Might sound stupid.... but invest in a good shift light. Youll be surprised how much faster your car can be shifting consistency.

manzo81maro

Nice runs, great 60' on the second pass

z twenty h8

iTrader: (2)

Thanks all! I've got a raptor light in the a-pillar vent.
I think it boils down to turning her up and letting her loose! Think 18lbs in the tires will hold a 5500-6500 clutch dump?

sweet99ss

iTrader: (41)

Not to far off 10's. I remember following your build last year. What size cam is in the 408? My setup was very similar. I think the LS3 heads hold it back a bit. I bet a set of ported heads would have you 10's!

z twenty h8

iTrader: (2)

238/254 @ 115

What did you end up pulling on your 408 build?

sweet99ss

iTrader: (41)

It ran 11.2@121 with a 1.59 60ft it was my first time to the track with it and I was having traction issues. I think with some tuning and a ram air it would have been 10's... Do you have a/c? Also do you have a ram air on it?

z twenty h8

iTrader: (2)

Yes, I've got a/c and an FTRA.

Well, went out to the track on Friday and couldn't hook worth a damn!! Played with the tire pressure and 2 step, and it finally hooked at 16 PSI with a 4500k launch. LOL I missed 3rd horribly that pass, but Still managed an 11.9...

Hope to have better luck next time out.

z28241

iTrader: (13)

I think its a pretty stout build! Since your looking for some feedback, I have to say i think the 28'' tire and 3.89 gear combo arent helping you very much, I vote for a 4.30 gear if your looking to go faster. Nice car!