Gavril V8 engine

Hey go check out my Gavril Engines and Sound mod

 

Sorry for the bump, but I noticed something: I recreated the Gavril V8 engine in Automation and was only able to get comparable output numbers by using MPFI. However, no injector rails are modeled. Please, either model the injector rails or reduce the power output - with TBI, the 4.5 should be making around 175 HP, and the 5.5 should put out around 210.

 

When using Automation in sandbox, you have to keep in mind that tech research is not taken into account. For a mid 80's engine, you probably want +7 in just about every category, to account for that fact that the game is balanced assuming you've already had 45 years to research quality improvements at this point. Using this, it is pretty easy to get the Gavril 4.5 V8 up to 230 HP, and the 5.5 up to 250 HP. It's expensive to do so, but I believe it is perfectly possible for an TBI, OHC V8 to reach those power outputs.

 

TBH you're right, I was using pretty shiddy settings for tech. Then again, so were GM and Ford

 

GM and Ford motors of the era, specifically their i6s and V8s were nigh indestructible.

 

It's one of the main reasons why the Crown Vics have been continuing service for so long after their discontinuation (that and the body on frame construction). It's also why a lot of I6/V8 trucks and vans from the 90s are still being used in harsh working conditions without much maintenance. Not sure I can say the same for the I4/V6 sedans and crossovers Ford and GM make now but we'll have to wait and see.

 

Indestructible, but not the best performance.

 

They might have been choked on purpose.

 

As far as I know, the real performance problems came from lousy compression ratios. Removing the emissions equipment might help, but at the end of the day, you're not going to get any real performance without increasing the compression.

 

Awful fuel systems, bad cats and exhaust system, low compression cylinders all made the v8s disgraceful performance wise. Thank god that era has gone.

 

Not to mention the damn near flat cam lobes on the cams they used in the '80s...

 

So realistically, if I installed custom exhaust, a performance carburetor and a much hotter cam on an 80's Chevy 305, not to mention removed all the emissions crap, without changing the compression, how much power could I hope to get?

 

Without changing compression and still using carbs aren't getting much, but you can probably still push it up to around 250 HP. The top of the line fuel injected 305s made about 230 HP even with garbage compression ratios and emissions, so a good carb and aggressive tune could get you a bit higher. If you get aftermarket ported heads, and all that jazz, you could push one up to over 300 HP without changing the compression ratio much. If you got pre-1971 pistons and conrods, so you could run a normal compression ratio, you could probably hit 500 HP with a stock block, but it wouldn't be very driveable. Of course, the Gavril V8 is OHC, so it probably flows as good stock as a moderately tuned OHV 305 head does. Considering the 40 year old 5L 305 could make 230 HP with TBI in the 80s while still passing emissions, the Gavril 5.5 would probably push a fair bit higher. The 300-something HP it makes in the tuned version in the sport D15 is probably pretty reasonable for a high end stock tune.

 

Okay! Guess my first project car is gonna be a 1980's Cutlass Supreme (I would get a Monte Carlo, but the Cutlass is a little bit nicer.) I'll see what I can do to get 250 HP to the wheels without touching the engine internals.

 

You probably aren't getting 250HP to the wheels without touching internals, at least not without a supercharger or something. That 250HP is at the flywheel, optimistically. It depends on what engine you get, but making more power out of an emissions small block will be expensive. You're probably better off getting a TBI conversion, which will buy you a few HP, and a flatter torque curve, for comparatively little pain and under $2000. New cams won't do much if you still have poorly flowing stock head. A new head will make you a lot in the way of power, but it'll cost you about $1000 for decent heads that won't drop your compression even lower, and then you'll need to install them and get new cams, rockers, etc. too. Basically, don't bother with carbs, they're a bit of a pain, aren't as good for dailying, and there's a million and one self-contained EFI conversions for small blocks. Even if it doesn't net you as much power, you'll have a flatter torque curve, better efficiency, and generally better drivability.

 

Long story short, just go for ls if you want cheap hp and great base for tuning

 

Nothing about the LS is cheap bud.

 

Cheaper than those emission-choked shoddy v8s. İt also has much more aftermarket to support.

 

I stopped bothering with the V8 in my Jeep, I just took a sawzall to the floor and flintstone it. Probably wouldn't work in Beam though