MyE28.com

Yesterday we had my brothers E28 on the dyno. Everything went fine exept that after 4500 rpm we need bigger injectors and a bigger fuelpump. So all the mapping was up to 4500 rpm.

The result so far:

448 rwhp and 510 rwlb/ft @ 4500 rpm.

Can you tell us about the setup? Why no engine bay pic?

Offcourse!

S38B36
Bored to 3,7l
JE pistons (lower compression ratio and thicker bottom)
Port and polished head
Balanced crank, flywheel, rods, pistons
DTA engine managment
1600cc injectors
TCD 745i turbo
Custom made exhaust manifold
Custom 3,5" stainless exhaust
Southbend clutch
6 speed E34 ///M5 gearbox
3.07 big case rebuild LSD

We did most off the work ourselfs but the engine is build by a engine builder. The mapping is done by a guy who does alot of Scooby and Skyline tuning.





So now we need to work on a new fuelpump setup. We are going for a fuel cell in the trunk with a swirll pot and 2 Bosch 044 pumps. It also need bigger injectors but that the idle will be very bad so we are going for second fuel rail.

judging from the valve cover that S38 looks like B38 not B36
those HP and TRQ # are good

Great numbers! How does that rig compare to a Dynojet? What is the other wheel/hub doing during the pull?

Edit - quick search found this -

Dynojet to Dynomite Dyno Comparison on aj660’s 2011 CTS-V Coupe:

http://www.cadillacforums.com/forums...d-up-my-v.html


Bone stock, Vette Doctors Dynomite Dyno on 09-20-2010:
525 RWHP & 519 RWTQ


After the following mods, (9.5” lower pulley, CAI, 160˚, & Vette Doctors tune) Vette Doctors Dynomite dyno on 09-20-2010:


525 (stock) RWHP to 604.3 (modified) RWHP = 15.1% RWHP increase
519 (stock) RWTQ to 619.2 (modified) RWTQ = 19.3% RWTQ increase


The same car with the same modifications, (no other changes) on Mustang Magic’s Dynojet dyno on 10-04-2010:
556.2 RWHP
554.8 RWTQ


The Dynomite dynoed 8.7% (.087) more RWHP than the Dynojet
The Dynomite dynoed 11.6% (.116) more RWTQ than the Dynojet

Or:

The Dynojet dynoed 13.1% (.131) less RWHP than the Dynomite
The Dynojet dynoed 16.2% (.162) less RWTQ than the Dynomite

fukoa wrote:judging from the valve cover that S38 looks like B38 not B36
those HP and TRQ # are good

Yes, the valve cover is from a B38 but the rest is B36.

Duke wrote:Great numbers! How does that rig compare to a Dynojet? What is the other wheel/hub doing during the pull?

Those are for 4wd cars or they can drive the wheels when you can't switch off the tractioncontrol.

This was a very nice and clean dynoshop. The owner had a second gen Supra with 2jz his self.

it has the b38s cam sensor too, b36 has a distributor instead

I know, I put it al on there.

Where is your air filter located? The intake piping leads to the OE location for the charcoal canister. I'm interested because this is the same route I've taken. I assume the element is not trapped inside the hot engine bay...though you've added a partition.

Why the 745i turbo? Even upgraded there are much better options.

I'm not surprised you hit the ceiling given I presume stock fuel lines and pumps. A few rough calculations could have arrived at that result prior to strapping onto the dyno.

They don't have charcoal canisters in Europe.

We know the turbo is not the best choice but this build is started almost 6 years ago. We have learned alot from this and the next project (E12 S38B38 turbo) is going to be alot different.

For the fuel system we are looking at these parts:

Looks like a nice build! How much boost were you running on the dyno?

wkohler wrote:They don't have charcoal canisters in Europe.

No shit Sherlock. Chris & Kyle, always good for a witty one-liner.

My question regards the location of the air intake: is it pulling from the engine bay or has a large hole been cut in the sheetmetal to pull outside air for the compressor?

That Nuke gear looks nice, though the surge tank isn't necessary if proper baffling is added to the fuel tank. I assume you're increasing the size of the feed and return lines also?

Yes, new lines also. We want a surge tank because we're going to do some drifting too.

The airfilter is down there where the ABS unit sits in other E28's. It gets air from a custom opening in the valance with a custom duct to the filter. An aluminium heat shield seperates the filter from the engine bay.

These dyno runs are done @ 15psi turbo pressure.

Very clean build! Got any pics of the a>a IC prior to installation & what is the size? Also, with this setup what did you see for intake air temps under boost?

March the 16th the 537i will go to the hub dyno again! This time with the new fuel system so that it doesn't get lean above 4500 rpm.

The guy that does the mapping says that we can see numbers like 650Hp @ the crank. but let's not get to excited!

NICE!!!

hell, i am thinking about adding a swirl pot to my street car, baffling is non existent by the performance of the stock tank even with a functioning intank pump, if i tried to autocross with under 1/2 tank in the old shark it would fall on its face, and i am in the same boat on the street in the m635 at 1/4 or less (just like the old car) try to take off too fast and vroom buhhh vroom. small surge tank is easier then cutting a hole in the tank then trying to weld it up without blowing up or creating a weak point

Murfinator wrote: That Nuke gear looks nice, though the surge tank isn't necessary if proper baffling is added to the fuel tank.

Yes, E28 gas tanks suck big time! I'm going for a catch tank in my street E28 to.

Well, we went to the dyno again yesterday. Everything worked fine and the result is as follows:

566,4 Hp @ the crank
644 lbf/ft @ the crank

Here some pictures:

The new fuel pressure regulator:


2 Bosch 044 pumps and Nuke performance filter:


And for Murfiator:

Jelmer538i wrote:Well, we went to the dyno again yesterday. Everything worked fine and the result is as follows:

566,4 Hp @ the crank
644 lbf/ft @ the crank

Great numbers!! Nice execution of the mechanicals also.

Numbers at the hub?

Just wondering it's alittle confusing for me but
you dyned the engine on the stand or on a wheelhub
dyno? It's crank hp but the engine is still in the car. ??

its a calculation of the wheel HP and the expected/measured losses, most cars loose 12-20% between the flywheel and the road, i think bmws come in at around 15%

Shadow wrote:Just wondering it's alittle confusing for me but
you dyned the engine on the stand or on a wheelhub
dyno? It's crank hp but the engine is still in the car. ??

Oohh. Didn't think about that.

So basically it's a total guess at what it should
supposedly be making if there was xx amount of factual
drive-train losses..

The first driving and a driftday is done with the 537iT! The power/torque is unbelievable! It is now running on 14 psi because the boostcontroller is not working, we will get a new one soon.

Drifting went fine too, we can spin the tires in 4th gear all the way to the rev limiter and leave marks as long as 1600 feet!

Hey Jelmer,

What do you use for a low pressure pump? The original in tank pump?

Yes, we use a new OEM in tank pump that pumps the E85 to a swirl tank which feeds 2 Bosch 044's.