Thread: a 240SX SR20VE-T from Germany

here is a promo video of the dyno i was using yesterday:
Maha Prüfstand lps3000

thats flywheel numbers.

The problem with this dyno is the load it generates for the wheels. You must tie the car to ground and add some weight (sandbags, persons, or whatever is available :-) to the trunk to prevent wheelspin.
Because of this you will have a lot of power losses at the wheels. (the green curve is the power loss. you can see its over 80hp)
If you go on a Dyno dynamics or similar constructed dyno you will have losses around 20hp i think.

Measuring this car on a, lets say dyno dynamics, the readings would be 370whp i think.


The torque of this ve-t is crap. its really low. We have to do some further homework i think

It needs bigger valves. The Valves on the VE are smaller than the DE.

my god that beauty eats the speedometer

Where in Germany are you? I would love to see her in person. I'm in München right now and for the next two weeks. Just sayin'. Awesome ride though!

@zer099: no prob, i live near nürnberg which is 160km (100mls) from munich, if you go fast you can make it under 1 hour :-)

My proposal: Come here next weekend as there is a 2 days tuner meet at my friends engine shop "ZEX-Tuning". Lots of customers are coming and we will spend the whole weekend drinking beer, barbecuing and talking about nissan :-)
My two Silvias will be there. You can return saturday evening or stay the night at a cheap hotel like me.

The meet starts on friday evening and ends on sunday.
On saturday some customers/guests are driving to a near dynoshop to dyno their cars. I will also put my car on the dyno again aiming for the 400hp-mark.

Here is my mobile number: 0170 8682195

Dino

>>It needs bigger valves. The Valves on the VE are smaller than the DE.>>

i cannot imagine that this is the reason. If so it would not make good topend power? Or do you have concrete before-after measurements?

Even on 9 psi i made only 290NM (219lbft), but 337NM with my DET on same boost. So there is constantly a torque lack of appr. 18% over the det with same turbo.

I think its the Short runner intake (runners are only 60% of the DET-runner-length). I remember changing the intake manifold of my BMW E36 328i to the earlier model and shorter 325i-manifold. The car felt completely different. It lost 10% torque and gained 5% topendpower.
Problem is that beside mazworx there is nothing on the market, and the mazworx-intake looks very hardcore and nobody nows if it really brings the result i want. DET torque and VE TOPend :-)

i have to reconsider my claim about the short runner low torque theory:

i have gone through some of coheeds dynosheets and found out that he has more or less the same power to torque ratios than i have:

coheed:
442/349=1,266
363/288=1,26
305/236=1,29

my VET:
381/296=1,29 (18psi)
277/215=1,288 (9psi)

my DET:
350/328=1,067 (17psi)
293/272=1,077 (11psi)

Almost the same ratio between coheeds and my VE although he has stock manifold and a far bigger turbo. But the DET has a much different ratio.

So the reason for the low torque of the VE must be elsewhere:

Has anybody an idea? Has anybody a better power to torque ratio than coheed and i have ?

Lets see if we find some dynosheets of the older SR20DET Setup with GT2871 and 18Psi of boost. Dino can post them right here i think.

1.99-2.00 liter:
1) jpsr20det ........ 559.3 WHP, 452.0 WTQ - 92 octane
......................................18 psi, hybrid BW, SR16 cams, tubular exhaust manifold, Calum ECU, fuel and ignition piggy-backs, water/meth injection
2) LANCESR20 ..... 467.9 WHP, 384.2 WTQ - xx octane
......................................24 psi, unknown turbo/management/injection

taken from here:
http://www.sr20-forum.com/tuning/10391-most-powerful-engines-thread-dyno-thread-powerful-cars-tuners.html

447 and 402 is 1.11 power to torque.

My 442 and 349 was with the log manifold. But it seems like the biggest improvement to my tq was all exhaust work. Much bigger ex housing, no exhaust, and tubular manifold made 50 more torque on the same boost, but same whp.