September 2022 Car of the Month: hasa

[2mAn]

Factory options: E30 320is (Italian M3) year model 1988

Color: Original color unknown, currently industrial RAL 6037 "pure green"

Interior color: unknown

Engine modifications:

M20B28
M52B28TU crank, turned down to fit M20 block
Maxspeedingrods H-beam rods
84,5mm forged pistons, compression 11.5
Self made crank scraper & baffling
Lightweight steel flywheel & Sachs 618 clutch

Ported AMC head, 195cfm
dBilas 312 camshaft, dBilas springs, Febi rockers
Jenvey 45mm ITB system


Exhaust:

generic headers & 3" self made exhaust

Transmission:

4 speed dogbox

Differential:

Type188, 4.1 ratio, Quaife helical diff

Suspension:

BC-racing coilovers, customized by local race suspension specialist
MRT-engineering billet DTM-style arms front
Delring bushings at rear in Z3 hubs, modified rollcenter/toe/camber
Front Brembo 4piston calipers + 325mm E46 discs, rear BMW calipers +294mm discs

Wheels:

ATS DTC 9x17 et38

Exterior modifications:

widebody kit, riveted on with ghetto style
Self made fiberglass hood & trunk
Plastic side windows

Interior modifications:

Interior removed, full rollcage as per FIA rules.
Race seat, 6point harness
AIM MXL display

Story behind the car:

I saw ad about dirt cheap 320is rolling shell and could not resist having yet another race car project. Idea was just to have a cheap track car. But like usual, one modification leads to yet another modification... and series of modifications. But this incarnation is perhaps the last. Biggest problem is that I love engine tuning, which I have done about 30 years. And M20 is nice simple underrated engine.

[It's Soda Not Pop]

Are there any videos of this beast in action?

[hasa]

I have not any in-car stuff about the current version, but highlights from last races can be seen from other competitor's point of view here:

https://youtu.be/9f3qedGsutU?t=583

I have a plan to document season 2023 better.

[Northern]

Nice!

[82eye]

beautiful car

[zwill23]

Been following this car for a while now, love an M20 at its limits.

Did I read this is making close to 300 crank hp?

[hasa]

Dyno reading was 288bhp/7060rpm. Faster than M50B25 but slower than S54B32, that's all I know for sure!

[MasukBMW]

what transmission is this? very neat

[moatilliatta]

Always enjoy updates from this thing!

[DEV0 E30]

What a beast, very well deserved. Congrats.

[McGyver]

Awesome car and really nice build!

But how are you going to talk about and show the worked-over engine without dyno graphs!?!?!! Also, what's the tube that crosses over the engine to the passenger front?

I just watched the video, that thing is QUICK!!!!

[Aleman]

I have not any in-car stuff about the current version, but highlights from last races can be seen from other competitor's point of view here:

https://youtu.be/9f3qedGsutU?t=583

I have a plan to document season 2023 better.

The handling looks Ginsu Knife sharp around the corners! Nice!

[ForcedFirebird]

Yummy m20!

[82eye]

so much awesome

[hasa]

Awesome car and really nice build!

But how are you going to talk about and show the worked-over engine without dyno graphs!?!?!! Also, what's the tube that crosses over the engine to the passenger front?

I just watched the video, that thing is QUICK!!!!

Thanks! That crossing hose belongs to the ghetto tuned breather system.

Dyno graphs were originally published in the build thread. As there are always discussions of error marginals and different measurement standards, I did not publish them here. But here it is.

Gearbox is a 4-speed dogbox made in Finland. New 5 or 6 speed would be great, but costs arm and leg. The bellhousing is sourced from U.S. Some friendly guy from this forum helped me years ago to get a special M20/Getrag265 housing that is never sold in Europe. Many don't even know that one exists.