S50B32 run-in tune dyno video

[Brisbane E30]

Well Red Rocket is alive with a new heart transplant. The car was on the dyno last week to give it a run-in dyno tune. I'm very happy to say that the car made 330whp@7,000rpm. Calculating in a 20% drivetrain loss that equates to about 415hp@the crank. Considering that it is not all in and the fact that the engine was only turned to 7,000rpm (built to turn to over 8,500rpm) I am very happy with the results. I reckon that it sounds pretty nice too.

https://www.youtube.com/watch?v=3bkLaRWAOEM

[nrubenstein]

So, how exactly was the motor built? 330whp is way high for the S50B32.

[Brisbane E30]

So, how exactly was the motor built? 330whp is way high for the S50B32.

Do you mean what is done to the engine?

It has been rebuilt with 12.5:1 CR, 1mm oversize valves which have been multi-angled. The cams are massive "race only" Cat Cams with massive lift and duration. Everything in the engine has been replaced. Shim under bucket conversion. ECU is a Motec M84. Vanos has been deleted. Etc, etc.

[Bglad]

20% drivetrain loss is pretty Impressive. It's more like 10%. How did you quantify the 20% loss? Also, what dyno was used, and what parameters? I can make a stock M20 read 400whp with a couple tweaks to the settings. Dyno's are no more that tuning tools, and never accurately reflect power.

[Brisbane E30]

20% drivetrain loss is pretty Impressive. It's more like 10%. How did you quantify the 20% loss? Also, what dyno was used, and what parameters? I can make a stock M20 read 400whp with a couple tweaks to the settings. Dyno's are no more that tuning tools, and never accurately reflect power.

Good for you!

[Bglad]

Still didnt answer my questions.

[Brisbane E30]

A little perspective - same dyno, same operator, same conditions my mate's E46 M3 CSL made 265whp.

Of course a dyno is just a tuning tool, and out right numbers don't necessarily mean a whole lot.

But it's a good place to start and I can track the delta change when the all in tune and run is done.

[Brisbane E30]

Still didnt answer my questions.

And I don't intend to. None of it matters.

You're not impressed. That's cool. Not here to impress you.

[Bglad]

My 90 Honda Civic Si makes 152hp/140tq based on a 20% drive train loss. So basically what youre saying is that a 108hp engine makes 50 more hp from an intake and exhaust and a tune?

All I'm saying is, you need to fundamentally understand power conversions and distribution. Not saying thats not a healthy motor, but boasting about power is just bragging to impress. Also if you jack the tire pressures up to 60psi so you have less rolling resistance is usually worth a few more ponies ;)

[Bglad]

My 90 Honda Civic Si makes 152hp/140tq based on a 20% drive train loss. So basically what youre saying is that a 108hp engine makes 50 more hp from an intake and exhaust and a tune?

All I'm saying is, you need to fundamentally understand power conversions and distribution. Not saying thats not a healthy motor, but boasting about power is just bragging to impress. Also if you jack the tire pressures up to 60psi so you have less rolling resistance is usually worth a few more ponies ;)

[Brisbane E30]

My 90 Honda Civic Si makes 152hp/140tq based on a 20% drive train loss. So basically what youre saying is that a 108hp engine makes 50 more hp from an intake and exhaust and a tune?

All I'm saying is, you need to fundamentally understand power conversions and distribution. Not saying thats not a healthy motor, but boasting about power is just bragging to impress. Also if you jack the tire pressures up to 60psi so you have less rolling resistance is usually worth a few more ponies ;)

Who's boasting? Certainly not me.

And it's a hub dyno. No tyres to pump up.

[burkey001]

well, i think its awesome :)

[Brisbane E30]

Cheers Burkey.

Car comes home this week.

Next weekend it will be on display at the Mt Cootha Classic Hill Climb and then the week after that should be time for the full-house tune.

What size wheels and tyres were you running on your car?

Ive got 225/35/18 at the moment and there isn't a whole bunch of traction there. Also not a whole bunch of room for meatier tyres. Thinking of running 225/40/18 R comps (R888, Advan etc).

[digger]

s50b32 are awesome, do you have a printout of the graph? i'm interested to see the torque curve sans vanos.

a hub dyno has way less losses than a twin roller dyno as the tyre deformation is the biggest loss, but still must be plenty of power and fun in an e30

what cams and who did the head? any flow numbers?

[nrubenstein]

Do you mean what is done to the engine?

It has been rebuilt with 12.5:1 CR, 1mm oversize valves which have been multi-angled. The cams are massive "race only" Cat Cams with massive lift and duration. Everything in the engine has been replaced. Shim under bucket conversion. ECU is a Motec M84. Vanos has been deleted. Etc, etc.

Well, that explains that! Awesome to see strong results from that. :)