Single Turbo RX-7's Questions about all aspects of single turbo setups.

t78 dyno inside, 499rwhp at 17.4psi

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Old May 2, 2008 | 05:40 PM
  #1  
gusfd3s's Avatar
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t78 dyno inside, 499rwhp at 17.4psi

Today we ran the car on the dyno, Rototest hub dyno.

Setup

T78
Big streetport
Custom plenum 80mm throttlebody
shell V-power pump fuel.



Yesterday we achieved 448rwhp at 13.4psi, today we raised the boost to 17PSI.

The turbo is a bit laggy but when it comes on it seems to pull forever!
we only took it to 7400rpm today but the curves just won't peak.

7400rpm 498,8rwhp and 472,8nm or 350ft.lbs @17.4psi

Im now looking for a replacement for the t78, any suggestions?
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Old May 2, 2008 | 05:48 PM
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Gt4094
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Old May 2, 2008 | 05:59 PM
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Nice! You could run like .1 psi and hit 500. How did you make that manifold?
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Old May 2, 2008 | 05:59 PM
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get a vmount instead if u wanna fix the response
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Old May 3, 2008 | 01:16 AM
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The engine was easy to tune and responded well to the increase in boost from 14 psi (448rwhp) to 17.4 psi (498 rwhp). It sould be making around 550 hp ( cranc hp) at the point i lifted the pedal. Torque is 545 Nm ( cranc Nm) at a high 7300 rpm.With this stage 2 big streetport and the improved intake with ported xcessive lower manifold and Gustav made,ported upper manifold i think the engine can make horsepower up to 8000 rpm, but we haven't prove it yet! Plan was using E85 and make 500 rwhp but now it seems just fine with the Shell 99 unleaded fuel. Now you only need some R-tires to avoid those tire spin at 6000 rpm, am i right Gustav?"lol"

/Lasse
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Old May 3, 2008 | 03:01 AM
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gusfd3s's Avatar
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here is a pic from the making of the manifold.


One more not finished.


and the car



Fuel pump weldon 2035 prepared for future plans



Last edited by gusfd3s; May 3, 2008 at 03:08 AM.
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Old May 3, 2008 | 08:23 AM
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When are you going to tune for E85 ?
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Old May 3, 2008 | 09:41 AM
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gusfd3s's Avatar
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Originally Posted by Viking War Hammer
When are you going to tune for E85 ?
when i get bored driving around my 499whp..

would be pretty soon i guess

im getting a little bit worried about my rew rotors though, how far is it safe to push them? i also need to to upgrade my ignition setup i guess..
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Old May 3, 2008 | 11:14 AM
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pm me a price for the turbo if you want to sell it im in no hurry i hve one already but would like a spare
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Old May 3, 2008 | 11:31 AM
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Originally Posted by R-R-Rx7
get a vmount instead if u wanna fix the response
ummm yeah, ok
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Old May 3, 2008 | 02:33 PM
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No need to be worried about your 9:0 c:r rotors unless you come into a 3-cycle phase and ignite the unburnt combustion. Then you may have dented rotor flancs. Sure we try the E-85 soon! But there is a better alternative in Sweden E-98 from Aspen racing fuel which is 15% 100 octane mix with "E-85". Gustav,do we have the guts to break the 600 hp mark with E-98? I think at least Ari Yellon has made over 600 hp with a T-78 on race gas?

/Lasse
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Old May 3, 2008 | 03:05 PM
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Originally Posted by BASTARD
ummm yeah, ok
what?

i assume he wants a quicker turbo.
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Old May 3, 2008 | 04:17 PM
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Originally Posted by Lasse wankel
No need to be worried about your 9:0 c:r rotors unless you come into a 3-cycle phase and ignite the unburnt combustion. Then you may have dented rotor flancs. Sure we try the E-85 soon! But there is a better alternative in Sweden E-98 from Aspen racing fuel which is 15% 100 octane mix with "E-85". Gustav,do we have the guts to break the 600 hp mark with E-98? I think at least Ari Yellon has made over 600 hp with a T-78 on race gas?

/Lasse
e85 or pump gas, no fancy race gas/e98.

this is a streetcar not a dynoqueen :]
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Old May 18, 2008 | 03:40 PM
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today i connected all 6 injectors and everything seems to work, i just set secondary injectors to 3280cc...

when tank is empty i will start tuning for e85.

Hopefully i will hit the dyno very soon!
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Old May 18, 2008 | 11:55 PM
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That looks familiar.

Great setup.
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Old May 24, 2008 | 03:27 PM
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Originally Posted by crispeed

That looks familiar.

Great setup.
Never ever seen the v8killa setup so i wouldn't know

future plans is to put this engine into my other car.. aka my love.

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Old May 24, 2008 | 04:29 PM
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Hope we could say E85 is da **** on Monday don't we Gustav?

/Lasse
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