Some of my motors

[07CobaltGirl]

Still new to this. Here is one of my favorite engines, because I love M3s!

[07CobaltGirl]

Here is a SBC 327.



And a Chevy 302 SCCA motor.

[KD14]

Nice straight 6 engine, a bit expensive for an EFI engine though. Can i have the file?

Does the 302 SCCA motor really has OHV with DI?

[07CobaltGirl]

The E46 is the BMW M3 series motor, so it isn't really expensive considering it was used for a $50k+ automobile. I actually detuned it to meet the specs. It was capable of 370-ish HP with this configuration of components. The hardest thing to match was the RPMs at specific torque/hp ratings, so they are actually a tad off. It should be 270 ft-lb@4900 for tq and 343@7900 for hp. Everything else is correct for the motor used in the E46 M3. File is attached. Maybe you can get those right for me.

Yes, the SCCA 302 is not carburated, but Twin Direct Injected instead. The perks of designing it with 2013 components instead of 1967-69 components. This is my modern spin on the original Z-28 motor I fell in love with as a young girl. (My first car was a 427/4spd 1969 Camaro) It is aluminum block/head. I kept the pushrod for posterity, because it is a rich GM tradition. I wanted at least some part of it to be pure. Is there something wrong with pushrods and DI? I don't really know much about modern engines, but I am pretty good with pre-computer era (1981) GM motors.

I attached both files (I think). Give them a look and please post more comments!

[07CobaltGirl]

I made a new motor today. This one is a BBC 427 Turbo. Still trying to learn how to tune a turbocharger. I know the price/time is pretty high, but obviously it is a race setup, and not for mass production. There are not many 900+ hp vehicles running around. Feel free to have a look and offer tips for doing it better. Thanks!

[KD14]

Now i see why your M3 engine is too expesive.. you forced you use expensive bottom parts because of the bore\stroke ratio. Thats why i dont make replicas cause they always sucks since there are so much more variables in real life. What i do though, is making engines with only the capacity, hp@rpm and peak torque figure similar to other engines.

Your 427 engine is really nice, good figures and looking good on the graph (except for the uncompleted part of the turbo)
I gave it some tuning while trying not to change the parts that are vital for the replica.

Changes

-Changed block to AlSi. (Making the block and head from different materials decreases the mtbf drastically)
-Compression decreased to 9.3. (Its pointless to use such high compression on a turbo engine, it can now run on 95 octane with only 30hp loss + most of the time its better to use advanced ignition timing then higher comp)
-Cam profile decreased to 70. (85 is also pointless)
-Intecooler changed to air-water (air to air wasnt enough)
-Turbine size decreased and A\R ratio increased. (By doing this i increased the hp and the boost range)
-Fuel mixture 13.0. (Use less then 13 when you use at least 1.7 bar + of boost)
-Ignition timing 90.
-Catalytic changed to three-way (high flow is pointless or automation got it wrong)

426.8CI XP 40V DOHC TurboRev2.lua

(59.69 KiB) Downloaded 273 times

[07CobaltGirl]

Nice! More power AND more economy! I thought about doing air-water intercooler. Really I did! As for the other turbo settings, I don't really understand them very well. I tried messing around with it, but I only made it worse. Still learning.