Wisco Speed and Performance

Wisco Speed and Performance WSP specializes in GM performance, repair, aftermarket parts sales, custom wheel/tire packages, etc.

We've been consistently growing the vehicles in our track support fleet, and open to add more partners for the 2026 seas...
12/14/2025

We've been consistently growing the vehicles in our track support fleet, and open to add more partners for the 2026 season and beyond. Whether you're at the track every weekend or just for special occasions, we can help you make sure your hotrod is ready for its next track day!

We don't just do aftermarket upgrades, we'll service your performance vehicles and hotrods too! Although we thrive in up...
12/07/2025

We don't just do aftermarket upgrades, we'll service your performance vehicles and hotrods too! Although we thrive in upgrades, service and maintenance is another big part of our business.
We specialize in late model GM, but also work on classic cars, modern performance vehicles, and exotics.
Anything from fluid changes to transmission / differential replacements, fuel systems and electronics along with all other general repair and maintenance we've got you covered. Not only do we offer GM or OEM replacement parts but in many cases we can also upgrade to a higher quality non-factory replacement part for very similar price points to give the reassurance that the parts we installed will perform as well or better than the originals did.
Let us know how we can help!

Check out one of the recent C7 Z06 Corvettes that got our Stage 3 E (flex fuel) package.This combo made a solid 760whp &...
12/03/2025

Check out one of the recent C7 Z06 Corvettes that got our Stage 3 E (flex fuel) package.
This combo made a solid 760whp & 700tq and produced some impressive deep 5 second 60-130 times when all said and done. Here are the upgrades included in this WSP package.

Stage 3E Package
-LT4 Ported Blower w/ Upper and Lower Pulleys
-PD Blower Cam
-Trunnion Upgrade
-Cold Air Intake
-Catch Can
-P3 Gauge
-Flex Fuel Sensor & Tune

Other optional upgrades:
-Johnson Lifters
-Manton Pushrods
-Nick Williams 103mm Throttle Body
-Monster Triple Clutch
-Exhaust Upgrades

Please reach out with any questions on our packages or pricing.

For anybody on the fence on buying or thinking about a new set of Weld or Forgestar brand wheels we’re offering a 10-20%...
11/06/2025

For anybody on the fence on buying or thinking about a new set of Weld or Forgestar brand wheels we’re offering a 10-20% discount until December 1st on select wheels. This offer includes all in stock wheels so make sure to get on this before supplies run thin! Throwback pic to this killer C6 ZR1 with a nice set of Forgestar F14 Beadlocks in a custom finish.

This customer came to us with a pump gas 580ci Big Block Ford in his Foxbody Mustang with a Holley Sniper EFI setup on i...
11/05/2025

This customer came to us with a pump gas 580ci Big Block Ford in his Foxbody Mustang with a Holley Sniper EFI setup on it looking to get the tune worked out. We were able to get our base tune in it and moved on to getting the combination more dialed in for peak potential. Holley does a good job with their start up/box calibrations to get a vehicle running and driving, but there's always room for improvements to be made and performance left on the table for each setup.
To work thru these and get them dialed in certainly takes time and it may not be considered cheap, but more often than not, the gains are worth the expense not only in power but in idle quality and drivability as well! This is something you'll definitely feel in the seat of your pants along with performance rewards at the track.

This beautiful 1965 F250 came in awhile back for some finishing touches and Sniper EFI tune, as it was recently restored...
11/02/2025

This beautiful 1965 F250 came in awhile back for some finishing touches and Sniper EFI tune, as it was recently restored and fresh 347 Blueprint stroker installed. Doesn't take much for a classic like this to get some looks, but when it's looking, sounding, and running top notch, you'd be foolish not to turn your head!

This relic came to us for some routine service. Love seeing the cleanest of them all come out of the woodwork!
10/26/2025

This relic came to us for some routine service. Love seeing the cleanest of them all come out of the woodwork!

It's not often we get the chance to look at not just 1, but 2 66 Chevelles here at the speed shop! Love to see it!
10/23/2025

It's not often we get the chance to look at not just 1, but 2 66 Chevelles here at the speed shop! Love to see it!

🚨Rowdy S10 Alert🚨Earlier this year, our boy Rick brought us his fresh S10 drag and drive build to have it buttoned up, f...
10/20/2025

🚨Rowdy S10 Alert🚨
Earlier this year, our boy Rick brought us his fresh S10 drag and drive build to have it buttoned up, fired up, and tuned in preparation for Sick Summer. After working thru some first startup/fresh build kinks, we were able to get it rolling on the dyno and lay down some numbers!
Throughout the summer, he's been checking items off the list:
Sick Summer Finisher✅
9 second pass ✅
🏁Class Winner ✅🏁
PB after PB ✅
Looking forward to seeing this beautiful rig back here this winter to turn it up in preparation for some 8 second passes next year!

Check out this beautiful C10 we dialed in with the Holley Sniper! Customer brought it here running on the base cal with ...
10/16/2025

Check out this beautiful C10 we dialed in with the Holley Sniper! Customer brought it here running on the base cal with some concerns and wanted to get it optimized, so we did just that and were able to pick up a bit of power in the process!
Beautiful truck, clean install, real American horsepower!

10/13/2025

Big thank you to everyone that stopped out for our Fall Dyno Day this past Saturday! Had beautiful power-making weather and a good variety of cars on the dyno, everything from the classics to Chevy Sonics!
The top number of the day went to Brian Schmidt and his 2016 Hellcat that put down an impressive 1040HP!
If you listed an email on the form for the dyno Saturday, you should have received your dyno graphs earlier this morning. If you didn't, shoot us a message and we can get them over to you!
Thanks again and we look forward to catching up with you!

Address

177 N Grant Street
Rosendale, WI
54974

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

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