Beware of Extreme MotorSport
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Joined: Sep 2002
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From: KSA
Beware of Extreme MotorSport
The car just finished After 7 months waiting 
.... Anyways the baseline dyno runs were never close to 25xwhp as i posted before based on what I was told. They are 218whp 
when the car was totally stock. (Extreme usually don’t like customers to go back and check their cars so customers don’t get pissed even more when they see the car at the same place for the past 4 months)
After 7-8 months going back and forth and getting really frustrated the car is done at Last.
They couldn't push more than 19-20psi on pump gas with alky without seeing some KR so they kept 11 degrees of timing!!! The car made around 395whp 276wtq . This is a built motor with GT35R people.
On the race gas run the car made around 460whp and 380wtq pushing 29psi.
So as you can see the numbers weren’t where I wanted the car to be so we decided to add NOS.
So the final NOS shot was 50 shot for pump gas and 50 for race gas. The pump gas NOS run made 496 whp with boost creep and the race gas NOS made 513 whp. In the 513whp Dyno Graph I saw a huge drop in power… So I asked Shaun whats up with that… Is it knock!! …. He said no its BOOST CUT. I told him ok so where is the dyno run after this one when you increased the BOOST CUT limit… He told me I didn’t do one… I just increased the Boost cut limit!!!
Im telling my self WTF…. What about the midrange power when boost is full with the 50shot spraying through the engine?!
Now I tried asking to see the AEM logs for the runs, but they didn’t want me to see it. Anyways after I got the car and everything they send me the logs and when I look at them…… ALL I SEE is messed up Air/Fuel Ratio with 4 degrees of knock and timing retard from 11 degrees to 9 degrees!!!!
Now the funny thing is with RACE GAS he could only run 11 degrees of timing!!!! On pump gas the knock is bringing the timing back to 9 degrees.
I mean we spent $1200 for tuning and I expected to see better tuning than that. They are telling me now that the car should be fine and Shaun knows what he is doing LMAO. I don’t know how the guy tunes cars if his tunes look like this.
All in all it wasn’t a pleasant experience and I wouldn’t recommend anyone to take his car to Extreme unless it’s for simple work. Don’t give Shaun anything to tune.
.... Anyways the baseline dyno runs were never close to 25xwhp as i posted before based on what I was told. They are 218whp when the car was totally stock. (Extreme usually don’t like customers to go back and check their cars so customers don’t get pissed even more when they see the car at the same place for the past 4 months)After 7-8 months going back and forth and getting really frustrated the car is done at Last.
They couldn't push more than 19-20psi on pump gas with alky without seeing some KR so they kept 11 degrees of timing!!! The car made around 395whp 276wtq
. This is a built motor with GT35R people. On the race gas run the car made around 460whp and 380wtq pushing 29psi.
So as you can see the numbers weren’t where I wanted the car to be so we decided to add NOS.
So the final NOS shot was 50 shot for pump gas and 50 for race gas. The pump gas NOS run made 496 whp with boost creep and the race gas NOS made 513 whp. In the 513whp Dyno Graph I saw a huge drop in power… So I asked Shaun whats up with that… Is it knock!! …. He said no its BOOST CUT. I told him ok so where is the dyno run after this one when you increased the BOOST CUT limit… He told me I didn’t do one… I just increased the Boost cut limit!!!
Im telling my self WTF…. What about the midrange power when boost is full with the 50shot spraying through the engine?!
Now I tried asking to see the AEM logs for the runs, but they didn’t want me to see it. Anyways after I got the car and everything they send me the logs and when I look at them…… ALL I SEE is messed up Air/Fuel Ratio with 4 degrees of knock and timing retard from 11 degrees to 9 degrees!!!!
Now the funny thing is with RACE GAS he could only run 11 degrees of timing!!!! On pump gas the knock is bringing the timing back to 9 degrees.
I mean we spent $1200 for tuning and I expected to see better tuning than that. They are telling me now that the car should be fine and Shaun knows what he is doing LMAO. I don’t know how the guy tunes cars if his tunes look like this.
All in all it wasn’t a pleasant experience and I wouldn’t recommend anyone to take his car to Extreme unless it’s for simple work. Don’t give Shaun anything to tune.
Last edited by LSs1Power; Jul 13, 2005 at 03:15 PM.
Sorry to hear about your woes. I had problems with a purchase years ago as well and did not get a resolution to my satisfaction. I have never done any futher business with them myself. Switched to Buschur and Jarrod has always taken care of me even if there was a bump in the road he smoothed it out. Have also had good luck with RRE, Mach V and quite a few others over the years.
