299hp and 300ftlbs from my 2.7 turbo setup - At the wheels

[TopTuning]

Greetings all.

Wanted to post and share the performance I've been able to squeeze out of my (AFAIK) stock internal '77 911 2.7 engine.

Engine code says NON-S engine (150 hp stock?)

Setup:

MoTec m150 GPR
VAG style coil on plug
Electronic ITBs with water to air intercoolers (I make sell these see here: https://www.ebay.com/itm/373963592035 or PM me for more info)
ID1300X injectors
BorgWarner EFR 7670 Twin scroll IWG
Dual knock sensors
Dual wideband lambda pre turbo
997 style E-Pedal (I make / sell these too) https://www.ebay.com/itm/373711396082
915 gear box
Custom made MoTec Hall sensor for cam and crank position
Full custom engine harness, tefzel wire etc (I made)
AEM e85 fuel pump
AEM fuel pressure regulator
All new fuel lines etc for ethanol

Cheap headers modified for v-bands, with a connection y-pipe to the turbo (going to remake this in the future with fully custom headers and larger diameter pipes etc)
Simple 3" exhaust with large resonator can and a perforated "cone" inserted in to the pipe before the tip


Car is full flex fuel with MoTec. Can run any mixture of normal gas up to 100% ethanol. Usually runs e85 as did on this dyno.

0.65 - 0.75 BAR boost (9.5 -10.8 PSI)

Dyno work all done on Dynapack hub dyno

This car feels extremely fast, and I build fast Porsches for a living! (mostly 800hp+ 959s)

It has great lowend and spools nice and fast on the street. MoTec has logged 0-60 in under 4 seconds with gentle shifts and no launch, launch control or LSD even (yet)

Driveability is fantastic.

Makes about 225whp on 91 octane gas at 0.5 bar and less timing. I almost never use pump however since E85 isn't hard to get here and cheap.

Something like 350hp at the crankshaft. I've been driving it HARD for 1000s of miles now with no signs of internal problems, but I assume it's close to the limit for a little mag block 2.7

Future plans will be an aluminum case and a full engine build to take full advantage of the turbo and electronics. I've made over 700hp with this turbo on another engine @ 2 BAR

Cheers!





Dip in power is from letting off to try and avoid clutch slipping on dyno

[pkabush]

Nice work! Can we see a couple close up shots of the engine ?

[TopTuning]

Here it is in all its test mule glory!

Everything is coming off / apart after all design work and body work is finished. It will be all pretty someday...

Going to make the top tanks out of metal as well probably with CNC flanges and inlets.

Love this stage though

[TopTuning]

[stownsen914]

Love the project! I've been hoping to build a similar engine for my 914 racecar forever (currently has an aluminum cased 2.7 NA motor). What kind of IATs do you see with that IC setup?

[TopTuning]

Originally Posted by stownsen914

Love the project! I've been hoping to build a similar engine for my 914 racecar forever (currently has an aluminum cased 2.7 NA motor). What kind of IATs do you see with that IC setup?

It works better than expected - 1-2 degrees over ambient normally.

Even after repeated pulls and hard tuning on the dyno, with way less airflow than driving, the hottest IAT I saw was 95 degrees F. Mostly around 75-80 on the dyno, with 65-70 degree air temp.

IAT before intercoolers is usually about +30 degrees over ambient in boost.

Often, when I drive in the morning, the intercooler water and inlet air temp never even gets as warm as ambient air temp. Still cold from over night.

Bell WTA intercooler cores are very, very good.


Intake manifolds are barely warm to the touch after repeated dyno pulls... good stuff

[Coastr]

Interesting AC compressor bracket you haven’t going on there. What’s that from? Is it a denso compressor? Love to see a test mule with AC!

[Bill Douglas]

A lovely bit of engineering you have going on there Top. Very professional and tidy.

[dannobee]

Very nice!

Which EFR turbos do you guys use on the 959's?

I really need to get over there, especially since a good friend of mine lives in Scott's Valley.

[slow&rusty]

Seriously impressive.

[cliyde]

Nice build! Surprisingly, these engines respond well with low boost on stock compression. My 3.2 turbo was around 325hp crank on 7psi with a concervative tune on 93 pump. Good times! Look forward to seeing your final outcome on the build!

Here's a pic of my previous setup.

Originally Posted by TopTuning

Greetings all.
Wanted to post and share the performance I've been able to squeeze out of my (AFAIK) stock internal '77 911 2.7 engine.

[Flynt]

Awesome. And I love the fact that the car is obviously geared toward performance, but still has AC. Is that a front mount condenser?

Considering something like this for a rebuilt 2.2 911T engine I have..

[1100sport]

Very nice set up :-) love to see more air to water I/C! How did you integrate the water system : did you put the water radiators in the rear fenders behind the air vents? Did you use an electric water pump?

[mikedsilva]

Wow. What a setup. That intercooler setup is very neat.

Suprised the mag case has stayed together !

[TopTuning]

Originally Posted by Flynt

Awesome. And I love the fact that the car is obviously geared toward performance, but still has AC. Is that a front mount condenser?

Considering something like this for a rebuilt 2.2 911T engine I have..

Yes, It's the smallest sanden compressor. Just made a bracket for it. It's a tight fit with the throttle motor...

Front condenser with ductwork and dual spall 6.5 fans. Gets to 33 degree vent temp, although it never really gets hot here in Santa Cruz.

Working on a heat pump system reversing system for heat as well. Would be nice to have it all in one device....

[TopTuning]

Originally Posted by 1100sport

Very nice set up :-) love to see more air to water I/C! How did you integrate the water system : did you put the water radiators in the rear fenders behind the air vents? Did you use an electric water pump?

Yeah, it's got a cooler up front with 12an hoses and a CWA 100 pump. Works very well. 1 gallon reservoir.

Working on ducting from the lower air inlet to have good directed air to it, but even running the system before I had a cooler (just long loops and the water tank) it hardly gets warm at all. Huge upgrade over when I ran it without intercoolers.

Bell cores are very effective, and the small volume with shorter charge pipes and small intercoolers helps with fast spool and quick response. Also - it's easy to work on!

[Raceboy]

Oh wait, but...but... you cannot boost mag case!

[TopTuning]

Originally Posted by Raceboy

Oh wait, but...but... you cannot boost mag case!

holding so far

I've seen that orange race car that guy runs a twin turbo 2.7, his was holding nicely until an overrev I think


DPHANS is the guy

[myamoto1]

Originally Posted by TopTuning

It will be all pretty someday...

It's drop dead sexy as is!

[TopTuning]

Originally Posted by myamoto1

It's drop dead sexy as is!

Haahaa well thank you!

I spend most my time doing full restorations on 959s so my standards are pretty high.