I just had Moe Bailey dynotune it. Awesome guy. What do you think of the numbers?

Before the dynotune, I had a mail order tune and was only making 378rwhp sae and 349ft-lbs. Now I am making 403rwhp sae and 387ft-lbs sae with LE1 heads, LE1 intake w/ a 306 cam though a T-56 trans with a 9" rear end and some nice 315 sized tires. Sorry about this distant graph. This particular run I made 402rwhp and 386ft-lbs of torque.

Someone tried telling me that you really don't lose any through a 9". He's wrong right? Out of curiousity what do you think I would have made on the 10 bolt?

Also I am about to go to a th350 trans with a 3800 stall. What do guys think my new dyno numbers will look like?

 

who cares about the dyno numbers with a th350 and a 3800 stall, it'll launch a lot more consistant. dyno numbers are only a tuning tool, track times are what matters

 

Haha, I knew someone was going to say that. I was just curious. Plus I hope the th350 will be more than just consistant. I want it to actually be faster than the t-56.

 

Good numbers, as mentioned though, lets see some track times to go with it. Now's the time to do it with the fall air.

 

Nice TQ curve and nive HP #'s also.

A 9" will rob some #'s over a 7.5 ring and pinion.

Even with a lt weight spool, I would expecty 10-12 RWHP missing and if you have a big heavy *** posi unit, I would think closer to 20 HP robbed.

The 9" has the ring and pinions contact pattern so they ron more power than a Dana 60 (or Strange 60) and I believe it is similar to a 12 bolt.

The advantage is that you will NEVER break the rear end.

Lloyd

 

Great numbers. Wit ha th350 and a 3800 stall...I am guessing 370hp and 350ft lbs but like everyone else said who cares as you will be faster at the track.

 

About one pull lol Nice numbers though

 

a dyno pull wouldn't break the 10 bolt with 400rwhp
hooking up with slicks and dr's is what breaks a 10-bolt

 

or some stick street tires.

Any amount of shock you send threw the 10 bolt will break something.

 

Are you trying to say that a 9" is stronger than a S60?


A 9" is exactly that, a 9" ring and pinion, where as a S60 is a 9.75" ring and pinion. The S60 is stranger than a 9" and takes away less power than both a 9" or a 12-bolt.

 

That is incorrect, the 10 bolt does not break at the first bit of stress it feels. There have been plenty of people that rode their 10-bolts into the 10's dead hooking on slicks. Street tires will not break a 10 bolt unless the 10 bolt already has something wrong with it or has major wear and is not taken care of properly. With as many people running 10-bolts in the 10 and 11 second range, your statements confuse me. Why do you think a 10 bolt would break in a 400rwhp car on street tires??? I've never seen it happen and never heard of it happening. I'm sure it's happened before in rare circumstances but it's not very likely. It will especially not happen on a dyno with that much power.

 

I think alot of the 10 and 11 second cars with the 10 bolts and slicks were most likely automatics. I really just don't see a 10 bolt with a 6 speed lasting that long at all with a hard launch and 400 to the wheels with slicks.

 

 

Maybe you forgot he has a M6. Knew a guy with a M6 that broke 3 rearends in one summer with street tires. Yes he beat the crap out of the car. Autos are a different story. Mine has seen some high tens on the bottle, dead hooking with some high 1.4xs 60 ft. times.

 

Yes, I was talking about auto's such as my own. I can see where you guys are coming from though, refering to a 6-speed. That could definitely do some damage. Clutch dumps and such... But as I stated earlier, this would not happen on a dyno. The power comes on gradually at first. He could make as many dyno runs as he wanted and not break the 10-bolt with his 6-speed. I've still never known anyone personally who has broken their 10-bolt on street tires regardless of the transmission. I'm sure it can happen, but the chances are extremely slim with an auto and not very likely with a manual and just about zero on a dyno.