FP3794 makes 686whp at 26psi
Thread Starter
Joined: Jan 2004
Posts: 11,406
Likes: 78
From: Northwest
FP3794 makes 686whp at 26psi
Would you believe this is on WG line as well?
ER 9:1 LR2.4
Magnus V5 stock TB
Kelford 280/276
Bushmaster race port head
Forward Facing 3794 kit
60mm Test pipe dump
FIC2150s
Omnipower 4 bar
Dual 255s
E85
etc.
David had some bad luck with his last build and ended up losing a headgasket on the dyno. What intially seemed like a bad surface job quickly revealed all sorts of issues, a deck that looked like a waffle, rings in upside down, a head port that appeared to have been done with an auger bit, injector wiring, etc.
After getting the finances figured out he decided to have us do one of our LR2.4s to replace the one that he had just purchased and a Jeff Bush ported cylinder head as well. We built another 9:1 motor with our normal blend of Wiseco and R&R, Supertech valves, Kiggly valvesprings, and then reused as much of the parts as we could from the last build. One thing that was really notable was how BAD the last "head port" was in reality. Jeff couldnt believe how it looked and that it had been able to make power. Here is a comparison between the last head and Jeff's, notice the improvement in VE at work-
Wastegate line dropped since the engine could actually breath and not stack boost up in the intake. Rather than running a minimum of 28 it was now down to 26ish (about 2psi spread at peak power). The main bonus though is the increase in power, up nearly 60whp peak and 66whp max where it makes peak power now.
Even on 89 octane (to simulate Cali 91) pumpgas its pretty crazy-
That was only 8* of timing out the top as well, so if it were to stay on good fuel I really think we could run a little more boost and up the timing 2-3*. This car is really almost the VIII clone of my car last year so it shows combination is EVERYTHING. Also, just because you got a ported head it doesnt mean much as we can see here. As a side note, we ran the car in 4th at this level and it lost power during the pull (normal on our dyno under 700whp) but did spool 500rpm faster with some extra load on the motor-
Aaron
ER 9:1 LR2.4
Magnus V5 stock TB
Kelford 280/276
Bushmaster race port head
Forward Facing 3794 kit
60mm Test pipe dump
FIC2150s
Omnipower 4 bar
Dual 255s
E85
etc.
David had some bad luck with his last build and ended up losing a headgasket on the dyno. What intially seemed like a bad surface job quickly revealed all sorts of issues, a deck that looked like a waffle, rings in upside down, a head port that appeared to have been done with an auger bit, injector wiring, etc.
After getting the finances figured out he decided to have us do one of our LR2.4s to replace the one that he had just purchased and a Jeff Bush ported cylinder head as well. We built another 9:1 motor with our normal blend of Wiseco and R&R, Supertech valves, Kiggly valvesprings, and then reused as much of the parts as we could from the last build. One thing that was really notable was how BAD the last "head port" was in reality. Jeff couldnt believe how it looked and that it had been able to make power. Here is a comparison between the last head and Jeff's, notice the improvement in VE at work-
Wastegate line dropped since the engine could actually breath and not stack boost up in the intake. Rather than running a minimum of 28 it was now down to 26ish (about 2psi spread at peak power). The main bonus though is the increase in power, up nearly 60whp peak and 66whp max where it makes peak power now.
Even on 89 octane (to simulate Cali 91) pumpgas its pretty crazy-
That was only 8* of timing out the top as well, so if it were to stay on good fuel I really think we could run a little more boost and up the timing 2-3*. This car is really almost the VIII clone of my car last year so it shows combination is EVERYTHING. Also, just because you got a ported head it doesnt mean much as we can see here. As a side note, we ran the car in 4th at this level and it lost power during the pull (normal on our dyno under 700whp) but did spool 500rpm faster with some extra load on the motor-
Aaron
Evolving Member
Joined: Mar 2010
Posts: 323
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From: Behind a laptop in FLA
Love this turbo. Did a 10:1 2.0 about a year back on 93 @18psi made 508. When it hits, the bull**** quits. lol
Good job Aaron & the ER crew!
Good job Aaron & the ER crew!
Last edited by BillSpec; Apr 5, 2012 at 05:40 PM.
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nice numbers! thought tq would come on sooner though, even with the 3794...is this stock catback with test pipe dump?
regardless, insane numbers on 89 oct lol
regardless, insane numbers on 89 oct lol
Last edited by anthonyrb98; Apr 5, 2012 at 05:48 PM.
Thread Starter
Joined: Jan 2004
Posts: 11,406
Likes: 78
From: Northwest
Some 3" exhaust with dump, not sure of the brand. It will eventually get turned up but this motor had 14 miles on it when I pulled it on the dyno, 16 when I stopped the E85 tune, and only 20 when the pump tune got done.
While I dont think it takes that many miles to properly break a motor in I do believe that since very few people have ever driven a nearly 700whp car (especially when they get traction limited with the torque) giving them a little to start with and drive it is the best idea. This is the least amount of power that this car currently can make. I would have liked to seen GSCs in it but again we reused the parts he already had and it had Kelfords.
Anthony-
No MIVEC on a big housing big inducer turbo makes a big difference. Remember a 3586 spools WAY faster, and my car with the 3794 isnt a typical result either. 45* of MIVEC go a long way in making it wake up faster....like 800 rpm.
While I dont think it takes that many miles to properly break a motor in I do believe that since very few people have ever driven a nearly 700whp car (especially when they get traction limited with the torque) giving them a little to start with and drive it is the best idea. This is the least amount of power that this car currently can make. I would have liked to seen GSCs in it but again we reused the parts he already had and it had Kelfords.
Anthony-
No MIVEC on a big housing big inducer turbo makes a big difference. Remember a 3586 spools WAY faster, and my car with the 3794 isnt a typical result either. 45* of MIVEC go a long way in making it wake up faster....like 800 rpm.
yeah cant wait to see what i put down with my built 2.0 with the hta86 its a great turbo makes **** ton of power we will c 
u made awesome power whats full spool up on that turbo? rpm wise
u made awesome power whats full spool up on that turbo? rpm wiseSome 3" exhaust with dump, not sure of the brand. It will eventually get turned up but this motor had 14 miles on it when I pulled it on the dyno, 16 when I stopped the E85 tune, and only 20 when the pump tune got done.
While I dont think it takes that many miles to properly break a motor in I do believe that since very few people have ever driven a nearly 700whp car (especially when they get traction limited with the torque) giving them a little to start with and drive it is the best idea. This is the least amount of power that this car currently can make. I would have liked to seen GSCs in it but again we reused the parts he already had and it had Kelfords.
Anthony-
No MIVEC on a big housing big inducer turbo makes a big difference. Remember a 3586 spools WAY faster, and my car with the 3794 isnt a typical result either. 45* of MIVEC go a long way in making it wake up faster....like 800 rpm.
While I dont think it takes that many miles to properly break a motor in I do believe that since very few people have ever driven a nearly 700whp car (especially when they get traction limited with the torque) giving them a little to start with and drive it is the best idea. This is the least amount of power that this car currently can make. I would have liked to seen GSCs in it but again we reused the parts he already had and it had Kelfords.
Anthony-
No MIVEC on a big housing big inducer turbo makes a big difference. Remember a 3586 spools WAY faster, and my car with the 3794 isnt a typical result either. 45* of MIVEC go a long way in making it wake up faster....like 800 rpm.
!how are these cams compared to s2/s3's?
