Took The Compund Boost Set Up The Track!

[kbracing96]

Ok, so a little history on the old setup and the new one. Previously, the truck had this motor, a MPT70 turbo with .68 a/r. Built 4L60e tranny and TB Stall. Race weight was about 5400 with me in it. DA was about 8000+ (track is 4800') Best pass with that combo was 12.2@110mph with a 1.76 60' running 15psi of boost.

Now for today, TVS1900 being feed by BW S475 turbo. 4L80e tranny with 10.5" Circle D single disk 2800 stall. Race weight is about 120+lbs heavier with the blower, tranny and 3/4 tank of gas. DA was about 7800'. Was running about 13psi of boost.

First pass was fresh off the drive up there, track is about a hour drive away. Truck sat about 20 min with getting teched and all then strait to the staging lanes. It was VERY heat soaked, IAT's were hi just sitting there, 130* or so, then made the pass in full street trim. Was a 13.8@100 with a 2.3 60' Leaving with about 7psi of boost. IAT's where 160* at the end of the run which I know was pulling a bunch of timing. So I went over to the convince store across the street and bought a couple bags of ice and than back to the track. I filled my intercooler reservoir with as much as I could and got the water all cooled off and and made another pass in full street trim. Was much better, 13.3@105 with a 2.0 60'. IAT's started at 95 and 120 at the end of the run. AFR was 11.5-12.2 a tad leaner then I like to run, but I didn't bring my EFILive. Timing was about 20.5.

So I decided to see what it would do in normal full race trim. I pulled the spare, tail gate, head light and cutout plate. This was right at the lunch break for the track crew so it got to set for over an hour and cool everything off really well. Was MUCH happier with this run, I left on 9psi of boost and pulled a 12.7@109 with a 1.87 60', BUT, didn't want to make the 2-3 shift and bounced off the rev limiter (6400rpm) 2-3 times and I lifted briefly so I know that cost me a couple tenths. Since I didn't have my tuning software I couldn't fix it . Made another run, but bounce off the limiter a little harder and I didn't lift, so was a bit slower. So that was my day.

Oh, and one other thing, with 13psi of boost and cutout open, had 7-8psi of back pressure BEFORE the turbo


:::Cliff Note, truck ran best of 12.7@109:::

[ff_jeff]

So how do you feel about it? Good times, but a little slower then you ran before with out the blower.

[TurboMic]

Ya, it was slower Kyle.... Just in case you didnt know...lol...... you going to continue to play with this kit, or go back to turbo only?

[bud8fan]

Ya, it was slower Kyle.... Just in case you didnt know...lol...... you going to continue to play with this kit, or go back to turbo only?

he has the tvs 1900 already sold...

[RedHeartbeat]

If it were me something would have blown off the turbo and got pushed into the blower and ruined it before I could send it to the buyer.

Go back to turbo.

[kbracing96]

So how do you feel about it? Good times, but a little slower then you ran before with out the blower.

Wasn't really disappointed with that time, after all I was 2psi less boost, heaver and bounced of the rev-limiter. Add those to it and would have probable been about where I was, maybe a tad better.

The truck is a lot more responsive on the street with the blower, but just wasn't worth the cost.

Ya, the blower is sold, so gonna go back to turbo only, with a quick spool valve to get it going.

The funnest part about the whole day, is that it wasn't a normal track day. A diesel club had rented the track for a event they wanted to do with "truck" drag racing, drag towing and some stuff like that, with prizes for things like fastest "truck". I showed up with my truck and first they were like "this is for diesels only!" "Your a GASSER!" I was like WTF???, radio only said "trucks" not "diesel ONLY trucks" After me and another guy with a 2wd RCSB with a camed 5.3 spraying a 175 shot fought with them for a while and they realized they only had about 15 other truck at the time they let us run our "gassers", but for TIME ONLY, BUT still had to pay the $50 entry fee. I had already driven the hour to get there, so I did it any way.

Everyone loved my truck, but where pissed when I "smoked" ALL their diesels, I had the fasted truck, but they wouldn't give me the prize cuz I was a "gasser" and not a "diesel", lame

[ff_jeff]

Wasn't really disappointed with that time, after all I was 2psi less boost, heaver and bounced of the rev-limiter. Add those to it and would have probable been about where I was, maybe a tad better.

The truck is a lot more responsive on the street with the blower, but just wasn't worth the cost.

Ya, the blower is sold, so gonna go back to turbo only, with a quick spool valve to get it going.

The funnest part about the whole day, is that it wasn't a normal track day. A diesel club had rented the track for a event they wanted to do with "truck" drag racing, drag towing and some stuff like that, with prizes for things like fastest "truck". I showed up with my truck and first they were like "this is for diesels only!" "Your a GASSER!" I was like WTF???, radio only said "trucks" not "diesel ONLY trucks" After me and another guy with a 2wd RCCB with a camed 5.3 spraying a 175 shot fought with them for a while and they realized they only had about 15 other truck at the time they let us run our "gassers", but for TIME ONLY, BUT still had to pay the $50 entry fee. I had already driven the hour to get there, so I did it any way.

Everyone loved my truck, but where pissed when I "smoked" ALL there diesels, I had the fasted truck, but they wouldn't give me the prize cuz I was a "gasser" and not a "diesel", lame

Thats awesome man. Glad you rained on their parade.
Are you sticking with that turbo?

[kbracing96]

Ya, it was slower Kyle.... Just in case you didnt know...lol...... you going to continue to play with this kit, or go back to turbo only?

Thanks for pointing that out Mic, Guess I just felt fast after beating up a bunch of diesels,

[kbracing96]

Thats awesome man. Glad you rained on their parade.
Are you sticking with that turbo?

Yep, I think it will work well for my goals. People have made over 800rwhp with them