Twin Turbo Dyno Video
TECH Enthusiast
Joined: Nov 2003
Posts: 689
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Originally Posted by LASTLS1
Your forgetting we're on LS1 tech. Everyone wants 1000rwhp on 87 octane and getting 30 mpg! 
Also one thing you have to consider for a pump gas tune is cylinder pressure and detonation run hand in hand, with torque and cylinder pressure sharing a fairly direct relationship. Make less torque and turn the motor more RPM's and you will make more horsepower before you hit MBTT for your octane.
Originally Posted by Pro Stock John
Yeah Jim would not tune a 93 pump gas combo to the edge and then give it to the customer.
Andy why don't you hold off until tuning it up until around September, let me catch a bit more, I'm over a second slower than you right now.
Andy why don't you hold off until tuning it up until around September, let me catch a bit more, I'm over a second slower than you right now.
Your going to be just fine! One more time out to the track and you'll be right there, quit sand bagging!
Thread Starter
FormerVendor
Joined: Dec 2001
Posts: 2,444
Likes: 2
From: WWW.SPEEDINC.COM
Thanks guys. And just an update but the system we had in stock is now spoken for. We'll have another available in approx 1 month. (Need a little more time than usual due to the upcoming holidays).
Thread Starter
FormerVendor
Joined: Dec 2001
Posts: 2,444
Likes: 2
From: WWW.SPEEDINC.COM
Originally Posted by Dave95Formula
Just curious...what is in your Sportsman 370 Short-Block (rods, pistons, etc) to hold up to this power level? Are the heads studded? Stock size studs? Is the block o-ringed?
Dave
Dave
It is an Iron 6.0 block, stock crank, eagle rods, Diamond pistons/rings. ARP head studs are used (stock size) along with GM MLS gaskets. The block is not O-ringed.
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TECH Enthusiast
Joined: Mar 2004
Posts: 604
Likes: 0
From: Loganville, GA
Originally Posted by Fraser@speedinc
Theirs a 370 sportsman shortblock in stock if anyone wants to get serious 
In case if anyone is wondering, I'm not looking to grab the last block... I'm just PM'ing for some info about the block
Last edited by mahhddgtp; Dec 18, 2006 at 12:55 AM.
Originally Posted by INTMD8
We recently finished a customer vehicle with our new Twin Turbo street system.
system details- https://ls1tech.com/forums/forced-induction/537009-new-twin-turbo-system-pics.html
video- http://www.ls1speed.com/movies/820tt.wmv
The engine is our 370ci sportsman shortblock, AFR 225 heads, 225/225 113lsa cam, stock throttle body/LS6 intake. T400 trans, 12-bolt rearend w/3.73's (soon to be changed to 3.08's).
This is our new twin turbo system that retains all stock accessories in their original location. Turbos are PT67 P-trim, which as we found are actually physically longer than the GT35R's which caused some clearance issues with the motor mount stands on the K-member. (grinding for clearance was necessary). Dyno runs were also made through a dual 2.5in exhaust exiting at the rear bumper. (it was on the car previously and the customer wanted to keep it).
I tuned it with HP Tuners 3-bar operating system. Injectors are 60lb edge injectors @72psi base pressure.
It made 520rwhp @ 8psi boost and 820rwhp @21psi boost. Pulls were made to 7100rpm. Iat's reached 85 deg at 7,100 and 21psi boost.
All in all we are very pleased with the results considering the cars streetability is not compromised. Should easily be good for 900+rwhp in a 6-speed car.
system details- https://ls1tech.com/forums/forced-induction/537009-new-twin-turbo-system-pics.html
video- http://www.ls1speed.com/movies/820tt.wmv
The engine is our 370ci sportsman shortblock, AFR 225 heads, 225/225 113lsa cam, stock throttle body/LS6 intake. T400 trans, 12-bolt rearend w/3.73's (soon to be changed to 3.08's).
This is our new twin turbo system that retains all stock accessories in their original location. Turbos are PT67 P-trim, which as we found are actually physically longer than the GT35R's which caused some clearance issues with the motor mount stands on the K-member. (grinding for clearance was necessary). Dyno runs were also made through a dual 2.5in exhaust exiting at the rear bumper. (it was on the car previously and the customer wanted to keep it).
I tuned it with HP Tuners 3-bar operating system. Injectors are 60lb edge injectors @72psi base pressure.
It made 520rwhp @ 8psi boost and 820rwhp @21psi boost. Pulls were made to 7100rpm. Iat's reached 85 deg at 7,100 and 21psi boost.
All in all we are very pleased with the results considering the cars streetability is not compromised. Should easily be good for 900+rwhp in a 6-speed car.
Jim, did you use the base FP @72psi plus boost referenced the regulator for a total of 94psi ?
Thread Starter
FormerVendor
Joined: Dec 2001
Posts: 2,444
Likes: 2
From: WWW.SPEEDINC.COM
Originally Posted by No Juice
Jim, when is your car going to be up and running again with this kit on it? What motor are you going to put back in it?
Stock aluminum block, stock crank, scat I-beams, Diamond pistons (flat top). Still keeping the same truck heads and 216/216 cam.
I'll probably just keep it at around 600rwhp until I can do a rearend and a better clutch. I'm looking forward to the spring as this car will become my daily driver.
