Jackass w/ LS9: original build and new Jackass 2.0 updates!

[JohnC]

Originally Posted by PTAddict

If you take a look at the speed stop results from the 2015 challenge:

https://clubregistration.net/clients...ubEventType=SS

and then the AX results:

https://clubregistration.net/clients...ubEventType=AX

You will see the dominance of 4WD in the low speed events. Danny Popp was competitive in his C5 'Vette, but he was driving at 10.5 tenths to do it

Watching the speed stop in person, it was visually obvious how much harder the 4wd cars launch. Any car that has enough power/weight ratio to win will probably have traction issues in the lower gears with 2WD and street tires, especially front engine cars.

OK, I understand by looking at the results, but if that's the case, why does porsche make so many different 911 models for example? How does one decide?...lol

[Panteracer]

One thing I have noticed when tracking is how much faster the
new gt3's are compared to an older one... they seem to accelerate
a lot faster now.. never had them pull away from me in the Pantera
like they do now.
My neighbor said the new transmissions are so much better and
I read where they moved the torque curve down a couple hundred
Rpms and they are .3 faster on a track... They just keep tweaking
things that we cannot on our cars

Still fun to run around in a 43 year old car with those boys

Bob

[BonzoHansen]

OUSCI was SEMA cars that can go to the track and now it is Track cars that can go to SEMA.

That perfectly captures what my friend and i talked about all day saturday. This was the 4th time we've been to ousci, and we've seen the move to 'race cars'. You've mentioned you cannot build an old muscle car to beat new cars. Watching that porsche tear up the speed stop in such a seemingly effortless manner drove that home in spades.

[LS7 Z/28]

Hey Mark, I tried sending you a PM a while back but your inbox was full. Do you have a part number for the Air filter you like to use on your current setup? I saw a recent photo when you were finishing things up on this for the good guys show. It looks like a huge filter, is it sourced from a GM vehicle? I had a discussion with Brian Thomson about this but he wasn't sure about where you're getting the filter from. Thank you for any information you might be able to provide. The Airraid filter I bought was starving my engine on the chassis dyno.

Thanks

[Stielow]

Originally Posted by LS7 Z/28

Hey Mark, I tried sending you a PM a while back but your inbox was full. Do you have a part number for the Air filter you like to use on your current setup? I saw a recent photo when you were finishing things up on this for the good guys show. It looks like a huge filter, is it sourced from a GM vehicle? I had a discussion with Brian Thomson about this but he wasn't sure about where you're getting the filter from. Thank you for any information you might be able to provide. The Airraid filter I bought was starving my engine on the chassis dyno.

Thanks

It is a 6 inch inlet K&N. I made an adaptor to neck it down to 5 inches. Matt at Sled Alley made the inlet tube that tapers fron 5 inches down to 4 inches at the 90 mm TB.

I hope that helps. I can try to finf the part number but it was the biggest one I could fit in the fender.

BTW my engine is flowing around 1600 CFM so a big filter is part of the package.

Mark

[LS7 Z/28]

Originally Posted by Stielow

It is a 6 inch inlet K&N. I made an adaptor to neck it down to 5 inches. Matt at Sled Alley made the inlet tube that tapers fron 5 inches down to 4 inches at the 90 mm TB.

I hope that helps. I can try to finf the part number but it was the biggest one I could fit in the fender.

BTW my engine is flowing around 1600 CFM so a big filter is part of the package.

Mark

Thanks Mark, that is great info. Your engine is certainly an anomaly!

[Sieg]

Originally Posted by mikels

BTW Sieg: I did happen to catch your 'fix' comment - and found it quite funny.

[formula88]

Some JA video from an earlier test session:

[Sieg]

Jackass looking good on the track last weekend.

[Vince@Meanstreets]

great shot Scott!!

Thanks Mark!!