386 RWHP @ 13PSI, Turbo-NA w/GT4088R, Aux Bridge, etc.
10-01-07, 12:28 PM
#51
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https://www.rx7club.com/fdnewbie-imports-172/gb-racelogic-674843/
10-01-07, 06:20 PM
#52
With each successive run we pulled a bit of fuel and gained between 10 and 20 HP every time. After approximately 6-8 runs (I lost count) the final number was 387 RWHP, 279 FT-LBS @ 13 PSI. A conservative estimate puts that right around 420 HP at the flywheel. Not half bad for an hour on the dyno on low boost. A/F ratios are in the mid 12s until about 5 PSI, falling to the mid 11s to 10 PSI, then low 11s to 13 PSI. Timing is still VERY conservative at 10 degrees. I could put a few degrees of timing into it right now and pick up a few more HP but I'd rather wait and borrow an EGT gauge (or buy a cheap one) before I start bumping timing too much.
10*@13psi is very low timing. of course i'm expecting you to take this with a grain of salt, as i'm just another guy posted in your thread on rx7club, but 10* is very low timing and i'm surprised the car is running as well as it is. that probably also explains the low tq numbers.
at 13psi i'd start from about 15* and add a degree or two with the EGT gauge.
what split are you running?
10-02-07, 08:51 AM
#53
Engine, Not Motor
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Screw that! Run high boost all the time!
https://www.rx7club.com/showthread.php?t=674843
https://www.rx7club.com/showthread.php?t=674843
10*@13psi is very low timing. of course i'm expecting you to take this with a grain of salt, as i'm just another guy posted in your thread on rx7club, but 10* is very low timing and i'm surprised the car is running as well as it is. that probably also explains the low tq numbers.
at 13psi i'd start from about 15* and add a degree or two with the EGT gauge.
what split are you running?
at 13psi i'd start from about 15* and add a degree or two with the EGT gauge.
what split are you running?
In my experience, bridgeports just don't respond well to lots of timing. At low loads 30-35 degrees will make a pretty decent difference in mileage and driveability, but under boost I've not really seen a lot of gain by going past 15-16 degrees. Next time I dyno the car I'll be bumping the timing a bit at low boost, though probably keeping below 14 degrees under high boost...Pump gas friendly, and all that.
Honestly I don't know what the split is set to. I've not changed it from Microtech's base map. Probably something I should look at, now that you mention it...
10-07-07, 12:43 PM
#57
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Nice build Aaron cake!
Never ever think about buying a Kaaz diff :P If you do it`ll go from daily driver to trackday ONLY..
Im running a TIal wg with a .45bar spring and the profecII boost controller and it works really well.. Nice to have low power when its really wet
Never ever think about buying a Kaaz diff :P If you do it`ll go from daily driver to trackday ONLY..
Im running a TIal wg with a .45bar spring and the profecII boost controller and it works really well.. Nice to have low power when its really wet
10-08-07, 09:53 AM
#59
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Made some 1/4 mile runs on Friday. Best run was about 13.12 @ 176 with the tires spinning 3/4 of the way down the track. Traction remains the biggest problem but at least I've got the launch figured out. I'll post some timeslips when I feel like scanning a few of them and have the video edited...
10-08-07, 10:12 AM
#60
Made some 1/4 mile runs on Friday. Best run was about 13.12 @ 176 with the tires spinning 3/4 of the way down the track. Traction remains the biggest problem but at least I've got the launch figured out. I'll post some timeslips when I feel like scanning a few of them and have the video edited...
At first i thought it was 176 MPH!!!.....had to do a double take, forgot you in Canada
Congrats on an awesome build.
FYI, 176 KMH = 109.3 MPH
10-13-07, 05:45 PM
#62
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Everyone needs to stop questioning Aaron, he knows what hes doing, and he knows something is going to give, and he's is prepared for to deal with it. When do I get a ride in this monster?
10-20-07, 07:26 PM
#63
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Here's the video from two weeks ago at the track:
http://www.youtube.com/watch?v=UOPXWf7_LQ8
Crazyness...Loosing traction in 4th gear at 170 KM/H is a bit scary...
http://www.youtube.com/watch?v=UOPXWf7_LQ8
Crazyness...Loosing traction in 4th gear at 170 KM/H is a bit scary...
10-21-07, 09:58 AM
#66
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Timing mistake. Seems to happen fairly often at Sparta. It's sort of funny sometimes when the numbers are totally skewed. I have some timeslips from when the car was NA that show 14.xx at 70 MPH.
The car breaks traction in every gear but 5th so there's not a lot of point in hammering the shifts. It's more then a but unnerving putting the car sideways going into 4th at ~170 KM/H, and a little unsafe as well. So until I get an LSD and some rubber it's enough just to keep the car on the track. The car is a mid/low 11 second car once I have traction...
The car breaks traction in every gear but 5th so there's not a lot of point in hammering the shifts. It's more then a but unnerving putting the car sideways going into 4th at ~170 KM/H, and a little unsafe as well. So until I get an LSD and some rubber it's enough just to keep the car on the track.
The car is a mid/low 11 second car once I have traction...
10-21-07, 06:48 PM
#67
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so aaron You have done a lot with the 6 ports now .... Would you mind if I pick you brain for a bit of what you would recommend?
I am going to be rebuilding my spare origional NA but the more I think about it the more I think of it as a re-create. Since I am going new housing and possibly new rotors if I can't find some REALLY good low compression s4 rotors, most of the important stuff is new. I am going to be using the stock turbo and turbo manifold.
Anyways I was wondering what your thoughts were on the intake. I was thinking either I could keep my port matched turbo LIM and corresponding uim and suck, or I could do a spacer like you did on your first build and run the NA lim and intake. Do you think it even matters or its noticeable? Would having working 5/6 port actuators help build boost at all at lower RPM? I will be using turbo primary ports, and na secondary + aux.
Thanks, just wondering your opinions. I am only going to be doing a street port, nothing big like yours. Although I will have a haltech.
Would you consider a street ported 6 port turbo application better or at any special advantage without the 5/6 ports over a street ported 4 port application?
I am going to be rebuilding my spare origional NA but the more I think about it the more I think of it as a re-create. Since I am going new housing and possibly new rotors if I can't find some REALLY good low compression s4 rotors, most of the important stuff is new. I am going to be using the stock turbo and turbo manifold.
Anyways I was wondering what your thoughts were on the intake. I was thinking either I could keep my port matched turbo LIM and corresponding uim and suck, or I could do a spacer like you did on your first build and run the NA lim and intake. Do you think it even matters or its noticeable? Would having working 5/6 port actuators help build boost at all at lower RPM? I will be using turbo primary ports, and na secondary + aux.
Thanks, just wondering your opinions. I am only going to be doing a street port, nothing big like yours. Although I will have a haltech.
Would you consider a street ported 6 port turbo application better or at any special advantage without the 5/6 ports over a street ported 4 port application?
10-22-07, 02:11 AM
#68
Just turn up the boost!
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176 kph is only like 110 mph right? either your car is 4000 lbs or your not making the power you dyno'd.. with the little bit of spin your getting the 13.2 seems about right. i really like your setup but something is off here
10-22-07, 09:47 AM
#70
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Next upgrade is an LSD...
Anyways I was wondering what your thoughts were on the intake. I was thinking either I could keep my port matched turbo LIM and corresponding uim and suck, or I could do a spacer like you did on your first build and run the NA lim and intake. Do you think it even matters or its noticeable? Would having working 5/6 port actuators help build boost at all at lower RPM? I will be using turbo primary ports, and na secondary + aux.
There will be no room to use the aux port stuff unless you make a custom exhaust manifold.
Thanks, just wondering your opinions. I am only going to be doing a street port, nothing big like yours. Although I will have a haltech.
Would you consider a street ported 6 port turbo application better or at any special advantage without the 5/6 ports over a street ported 4 port application?
10-22-07, 03:52 PM
#71
nice work on the setup Aaron, glad to see it finally up and running well.
just a warning at pushing 17+PSI on pump fuel, make sure you are at least running an auxiliary injectant, i'd hate to see the motor go bye bye due to detonation, especially a high compression n/a motor as the internal temps will skyrocket at those boost levels. 13PSI on that turbo is barely dipping into it's efficiency range as well, plan to have some real fun around 20PSI and grab the "oh ****" handles at 25+
for those questioning the 1/4 time, ask Aaron for his 60' times, i bet none were lower than a 2.3 second run, i had similar issues with my car and could hardly push further than a 13.2 due to wheel hop and spin. stickies and a LSD make a world of difference in 1/4 mile times.
just a warning at pushing 17+PSI on pump fuel, make sure you are at least running an auxiliary injectant, i'd hate to see the motor go bye bye due to detonation, especially a high compression n/a motor as the internal temps will skyrocket at those boost levels. 13PSI on that turbo is barely dipping into it's efficiency range as well, plan to have some real fun around 20PSI and grab the "oh ****" handles at 25+
for those questioning the 1/4 time, ask Aaron for his 60' times, i bet none were lower than a 2.3 second run, i had similar issues with my car and could hardly push further than a 13.2 due to wheel hop and spin. stickies and a LSD make a world of difference in 1/4 mile times.
Last edited by RotaryEvolution; 10-22-07 at 04:04 PM.
10-22-07, 04:15 PM
#72
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Suspension makes such a huge difference. When my car had about 275 WHP running shitty tires with an open diff on stock cosmo twin turbo's (13b-re), I was running 14.5 with massive wheel spin through first, some in second, but nothing like whats described here.
Same power just an LSD, much better tires, fresh suspension (AGX eibach bushings nothing to aggressive), and a pinion snubber (best 10$ spent on the car) It got into the high 12's on the first and only run I made in that configuration before blowing a turbo with a still shitty 60' time.
Same power just an LSD, much better tires, fresh suspension (AGX eibach bushings nothing to aggressive), and a pinion snubber (best 10$ spent on the car) It got into the high 12's on the first and only run I made in that configuration before blowing a turbo with a still shitty 60' time.
