Went to 1/4 mile racetrack today.
 

And my car feels pretty friggin zippy on the streets but all I could manage out of the thing was 14.8's consistently for all three passes.

It's a 87 TurboII. 3" downpipe, 2.5" from the collector out to mufflers / Flowmasters. ACT street strip clutch & pressure plate. And a 80's HKS piggyback computer that came already in the car from the previous owner. Everything else is stock.

What would be next move to get better time out of her...?

Rearend hop was HORRIBLE each & every time I came out of the hole.

Thanks.

You probably need to replace your front differential mount. They tend to tear and make the rear end act up a lot. A neat trick that helps is to install a pinion snubber to brace the differential from above. Apparently if you pull the bins there's a centered dimple where you drill and install the snubber. Preload it so it rests gently against the differential and it will protect your new mount from breaking.

I have yet to do this first-hand, but it's the next thing on my to-do list so I've been reading up on it.

Something better than a piggyback and a tune from a professional.

Did you drop tire pressure? Are you on stock suspension?

Rear tires are brand new BF Goodrich G-Force's. Nice and sticky. Atco Dragway in NJ is known for being real sticky as well. The wheel hop was quite the loud & scary being I drove 2.5 hours to get to the track. Tire pressure was dropped to 25 psi. Went around the water box and attempted a small dry burnout each time only to experience the same frightening wheel hop.

I'd love to get something better then just a piggy back but I don't think I'm at that stage yet. I enjoy driving the car as a semi daily and am not looking to tear the whole thing apart just yet.https://cimg8.ibsrv.net/gimg/www.rx7...24c425e560.jpg

Thanks Akaviri, I'll take a look under there see how everything is looking. I remember hearing about the snubber as well. They're not expensive if I remember correctly. I'll go check out Summit now.

Snubber is about $12 shipped, but a PITA to install. If the mount was busted, you'd feel the diff trying to fly through the floor every time you engaged the clutch. When making big power and fat tires, it still doesn't always save the mount, but definitely helps.

check rear alignment, may have some toe off. also shoulda tried 15 psi ;)

Can you post a time slip? There's a lot of information in the first few seconds, long before the ET.

But a set of cheater slicks will cut .5 - 1 second off that time. And be kinder on your differential mounts as well as stub shafts.

What Aaron said...

I am guessing that your 60ft sucked, based on your wheel hop comments.