Comp Thumprs Installed
99GTverts minion
Joined: Jun 2007
Posts: 1,214
From: New Baltimore, MI
.....and hopefully it is ready for dyno day...Yeah bring your pink slip - you have a lot more to lose than i do!
Thread Starter
2nd Gear Member
Joined: Oct 2006
Posts: 481
From: Michigan
Problem Solved:
Well my woes are over. Brenspeed arrived last night at my house last night, bear in mind its a 200mi drive one way, raining like hell and they towed a car carrier trailer. Turned out it was a tuning issue.
Basically they got to thinking, they really never tuned one with the Airaid without the sleeve, so the MAF was 101mm, and the fact I don't have charge motion deletes.
So they brought a Xcal3 with them with a set of tunes to try with the sleeve in. Basically on the first try it was night and day difference. That 2500-3200rpm hesitation is almost non-existent now. More like 2600-2700, if that even. Its that brief. The low end hesitation/backfire is greatly reduced. Well the hesitation is normal "5th gear at 30mph" but the backfiring is nearly non-existent.
What they've done is change the way the stock charge motion valves open under part throttle, mimicking like delete plates are installed. Essentially the car was getting choked until WOT, and then the valves would open all the way.
So all in all, took about 1hr of test driving and tuning to tweak it right. The only thing left is when the car comes to a stop and I push in the clutch, the rpms dip way below idle, close to 500rpms, and the tach does a little bounce and comes back to its idle rpm. They said they have a fix for that, but it can't be done via the tuner. They have manually edit the file.
So they left me the Xcal3 and they're emailing me the new tune today to load on my Xcal2. So I'll be switching the tuners back this afternoon, and trying the revised tune when I get home. They also are sending a pre-paid envelope/package to send their Xcal3 back to them.
Now that's customer service man. I was completely amazed by it. Its truly another testament to Brenspeed's name and quality of work. Now I can enjoy my car, the only downside now is I have to leave out of town for 2wks starting tomorrow morning.......
oh well.
Well my woes are over. Brenspeed arrived last night at my house last night, bear in mind its a 200mi drive one way, raining like hell and they towed a car carrier trailer. Turned out it was a tuning issue.
Basically they got to thinking, they really never tuned one with the Airaid without the sleeve, so the MAF was 101mm, and the fact I don't have charge motion deletes.
So they brought a Xcal3 with them with a set of tunes to try with the sleeve in. Basically on the first try it was night and day difference. That 2500-3200rpm hesitation is almost non-existent now. More like 2600-2700, if that even. Its that brief. The low end hesitation/backfire is greatly reduced. Well the hesitation is normal "5th gear at 30mph" but the backfiring is nearly non-existent.
What they've done is change the way the stock charge motion valves open under part throttle, mimicking like delete plates are installed. Essentially the car was getting choked until WOT, and then the valves would open all the way.
So all in all, took about 1hr of test driving and tuning to tweak it right. The only thing left is when the car comes to a stop and I push in the clutch, the rpms dip way below idle, close to 500rpms, and the tach does a little bounce and comes back to its idle rpm. They said they have a fix for that, but it can't be done via the tuner. They have manually edit the file.
So they left me the Xcal3 and they're emailing me the new tune today to load on my Xcal2. So I'll be switching the tuners back this afternoon, and trying the revised tune when I get home. They also are sending a pre-paid envelope/package to send their Xcal3 back to them.
Now that's customer service man. I was completely amazed by it. Its truly another testament to Brenspeed's name and quality of work. Now I can enjoy my car, the only downside now is I have to leave out of town for 2wks starting tomorrow morning.......
oh well.
6th Gear Member
Joined: May 2006
Posts: 11,883
From: Nicely done
that's great news doctorj, i'm glad things have
improved.
the issue you note regarding the rpm bounce, is
basically why i pulled my hot rods. i didn't like it
and decided to wait until tuners could figure out
how to reduce or eliminate the problem. if anyone
can figure it out it just might be brenspeed, so
i'm interested to hear your assessment after
you have a chance to run the revised tune.
improved.
the issue you note regarding the rpm bounce, is
basically why i pulled my hot rods. i didn't like it
and decided to wait until tuners could figure out
how to reduce or eliminate the problem. if anyone
can figure it out it just might be brenspeed, so
i'm interested to hear your assessment after
you have a chance to run the revised tune.
1st Gear Member
Joined: Feb 2009
Posts: 72
From: Illinois
Great to hear that Brenspeed takes care of it's customers like that. I just got my Steeda CAI and tuner from them last week and installed this past weekend. I was very satisfied with their customer service and hearing your story makes my decision to use them on further upgrades a no-brainer. I called them last Tuesday afternoon and they quickly got my information and setup my tune so they could ship out before they left for FL. It's great to see that some companies out there "get it" when it comes to taking care of their customers. Let us know how that custom tune works out. The Thumper might be back in the plans for my 08'.
2nd Gear Member
Joined: Jan 2005
Posts: 192
From: Coupland, Texas
Thanks guys. Brenspeed charges $460 for the install. Took less than 4hrs. Other than the phase limiters, the install is the same as the NSR cams.
I will say this, I've always wanted that Mustang sound guys get in the 2v. Its taken me 5 exhausts to figure out, it just won't happen.
But these cams have fixed that. I don't know how to describe it exactly. It still doesn't have that Mustang 2v "which don't matter now", but it sounds like a true muscle car now, as it should.
I can't get over how many people have complimented on it so far. The intimidation factor sitting at a stop light is priceless.
I will say this, I've always wanted that Mustang sound guys get in the 2v. Its taken me 5 exhausts to figure out, it just won't happen.
But these cams have fixed that. I don't know how to describe it exactly. It still doesn't have that Mustang 2v "which don't matter now", but it sounds like a true muscle car now, as it should.
I can't get over how many people have complimented on it so far. The intimidation factor sitting at a stop light is priceless.
Thread Starter
2nd Gear Member
Joined: Oct 2006
Posts: 481
From: Michigan
You know, that's a good question. I never really asked them about S/C or NOS later on with these cams. I think they'll be fine, but there are probably better cam profiles to use for that kind of application. I know a lot of guys use the FRPP cams and Superchargers and have decent results. Don't hear too much about the Thumprs being used with a S/C though. Or at least I haven't seen much.