This is Archie and they did a great job on dyno tuning my 421sbc. They did a great job and got it set on kill mode. They also installed the motor for me in my 85 Monte Carlo with no leaks and no problems. I highly recommend them if you want your motor tuned to its max performance and capabilities.Thanks

We had horrible experience with Weddle Performance Engines. I highly recommend not going her for anything. The service is absolutely horrible. The owner does not know how to run a business properly. He over charges everything, you are better off spending money in gas to go somewhere else to get engine work done. The owner does NOT give you a quote before working on your engine. It is a shame that we learned the hard way and had to pull our motor out. If you want to get your stuff worked on here, expect to wait about SIX MONTHS to get your motor done.

The owner seems like a well-meaning guy who is working out the kinks of running a business profitably. Their work is good, the shop is clean, but the final cost came out to be almost 3 Times what we talked about (with no unforseen issues) and Im extremely disappointed about that.Background:Jeff bought the small business about 18 months ago, changing the name from Mullvain to Weddle Performance. Mullvain, whose first name I forget, still works there but was looking to phase out and retire so the reigns went to Jeff. This place has been around a while, despite the handoff, and seemed to carry a lot of expertise.My Experience:I had them clean, inspect (disassemble and reassemble), and resurface my 32v Ford C-Heads. They also put in 2 spark plugs inserts. Initially the verbal estimate, which we went through carefully when I dropped the heads off, was $400-$450, plus an additional $450 if inspection revealed that they needed a valve job, which they didnt. I assumed it the total would be a bit more with shop fees, maybe $500, but that was acceptable. Thats the going rate for head work in Illinois at the moment.After some slight delays that werent much in their control, my final tab was a little above $1050. Theres also a 3.5% credit card fee, which I wasnt told about until pickup time, so I left and went to the bank to get cash to save the $35 surcharge.Anyway, after getting the call from Jeff this week that the cost would be over $700 more than expected, I called 2 other shops in the area and 2 out of town for estimates on this job and they all came back with a $400-600 total. One respectable Mustang shop in Detroit quoted $1200 for full out decking and porting, including shipping.Unfortunately this information did not sway Jeff in his new pricing and, at the time I was told the final price, they already had my heads disassembled and cleaned (apparently over $400 of sunk cost if I wanted to stop there), so I did not have much power to take my business elsewhere.One positive note, I do appreciate the guys working a couple hours of overtime to get me the heads back with only minor delay after some parts arrived damaged. Credit to them.Bottom Line:I would recommend this shop only if youre not sensitive to cost at all. For me, I would not have gotten my small job done here if I knew it would cost anywhere near the final price, but if maybe youre looking to make 1000hp out of your LS1 no matter the cost, Im sure they can make it happen.

Stand up guy for sure!

Mike Mullvain and his crew did a great job with the rebuild of my 360 Mopar motor. I had them machine, reassemble, break in and dyno the engine. World class work all the way. Friendly, knowledgeable and helpful in designing my rebuild. The engine performed better than I expected. Ran strong! First class operation! Highly recommend their business.

Always helpful and knowledgeable. Can build pretty much anything. Expect a wait to get the motor done, they are always busy which is no doubt good for them.